first commit

plugins/system/nrframework/fields/acymailing.php

@@ -0,0 +1,113 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+use NRFramework\Extension;
+
+JFormHelper::loadFieldClass('groupedlist');
+
+class JFormFieldAcymailing extends JFormFieldGroupedList
+{
+	/**
+	 * Method to get the field option groups.
+	 *
+	 * @return  array  The field option objects as a nested array in groups.
+	 *
+	 * @since   1.6
+	 */
+    public function getGroups()
+    {
+        $groups = [];
+        $lists  = [];
+
+        if ($acymailing_5_is_installed = Extension::isInstalled('com_acymailing'))
+        {
+            $lists['5'] = $this->getAcym5Lists();
+        }
+
+        if ($acymailing_6_is_installed = Extension::isInstalled('com_acym'))
+        {
+            $lists['6'] = $this->getAcym6Lists();
+        }
+
+        foreach ($lists as $group_key => $group)
+        {
+            if (!is_array($group))
+            {
+                continue;
+            }
+
+            foreach ($group as $list)
+            {
+                $groupLabel = 'AcyMailing ' . ($group_key == '5' ? $group_key : '');
+                $groups[$groupLabel][] = JHtml::_('select.option', $list->id, $list->name);
+            }
+        }
+
+        return $groups;
+    }
+
+    /**
+     *  Get AcyMailing 6 lists
+     *
+     *  @return  mixed   Array on success, null on failure
+     */
+    private function getAcym6Lists()
+    {
+        if (!@include_once(JPATH_ADMINISTRATOR . '/components/com_acym/helpers/helper.php'))
+        {
+            return;
+        }
+
+        $lists = acym_get('class.list')->getAll();
+
+        if (!is_array($lists))
+        {
+            return;
+        }
+
+        // Add 6: prefix to each list id.
+        foreach ($lists as $key => &$list)
+        {
+            $list->id = '6:' . $list->id;
+        }
+
+        return $lists;
+    }
+
+    /**
+     *  Get AcyMailing 5 lists
+     *
+     *  @return  mixed   Array on success, null on failure
+     */
+    private function getAcym5Lists()
+    {
+        if (!@include_once(JPATH_ADMINISTRATOR . '/components/com_acymailing/helpers/helper.php'))
+        {
+            return;
+        }
+         
+        $lists = acymailing_get('class.list')->getLists();
+
+        if (!is_array($lists))
+        {
+            return;
+        }
+
+        // The getGroups method expects the id property
+        foreach ($lists as $key => $list)
+        {
+            $list->id = $list->listid;
+        }
+
+        return $lists;
+    }
+}

plugins/system/nrframework/fields/ajaxify.php

@@ -0,0 +1,167 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+use Joomla\Registry\Registry;
+use NRFramework\HTML;
+
+JFormHelper::loadFieldClass('list');
+
+/*
+ * Creates an AJAX-based dropdown
+ * https://select2.org/
+ */
+abstract class JFormFieldAjaxify extends JFormFieldList
+{
+    /**
+     * Textbox placeholder
+     *
+     * @var string
+     */
+    protected $placeholder = 'Select Items';
+
+    /**
+     * AJAX rows limit
+     *
+     * @var int
+     */
+    protected $limit = 50;
+
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string
+     */
+    protected function getInput()
+    {   
+        if ($this->value && is_string($this->value))
+        {
+            $this->value = \NRFramework\Functions::makeArray($this->value);
+        }
+
+        $placeholder = (string) $this->element['placeholder'];
+        $this->placeholder = empty($placeholder) ? $this->placeholder : $placeholder;
+
+        HTML::stylesheet('plg_system_nrframework/select2.css');
+        HTML::script('plg_system_nrframework/vendor/select2.min.js');
+        HTML::script('plg_system_nrframework/ajaxify.js');
+
+        $this->class .= ' input-xxlarge select2 tf-select-ajaxify';
+
+        return '<div class="tf-ajaxify-wrapper" data-placeholder="' . htmlspecialchars(JText::_($this->placeholder)) . '" data-ajax-endpoint="' . $this->getAjaxEndpoint() . '">' . parent::getInput() . '</div>';
+    }
+
+    protected function getAjaxEndpoint()
+    {
+        $reflector = new ReflectionClass($this);
+        $filename = $reflector->getFileName();
+        $file = JFile::stripExt(basename($filename));
+
+        $token = JSession::getFormToken();
+
+        $field_attributes = (array) $this->element->attributes();
+
+        $data = [
+            'task'  => 'include',
+            'file'  => $file,
+            'path'  => 'plugins/system/nrframework/fields/',
+            'class' => get_called_class(),
+            $token  => 1,
+            'field_attributes' => $field_attributes['@attributes']
+        ];
+
+        return JURI::base() . '?option=com_ajax&format=raw&plugin=nrframework&' . http_build_query($data);
+    }
+
+    /**
+     * Returns data object used by the AJAX request
+     *
+     * @param   array    $options
+     *
+     * @return  array
+     */
+    public function onAjax($options)
+    {
+        $this->options = new Registry($options);
+
+        // Reinitialize Field
+        $this->element = (array) $this->options->get('field_attributes');
+        $this->init();
+
+        $this->limit       = $this->options->get('limit', $this->limit);
+        $this->page        = $this->options->get('page', 1);
+        $this->search_term = $this->options->get('term');
+
+        $rows = $this->getItems();
+
+        $hasMoreRecords = false;
+
+        if ($this->limit > 0)
+        {
+            $total = $this->getItemsTotal();
+            $hasMoreRecords = ($this->page * $this->limit) < $total;
+        }
+
+        $data = [
+            'results' => $rows,
+            'pagination' => ['more' => $hasMoreRecords]
+        ];
+
+        echo json_encode($data);
+    }
+
+    /**
+     * Load selected options
+     *
+     * @return void
+     */
+    protected function getOptions()
+    {
+        $options = $this->value;
+
+        if (empty($options))
+        {
+            return;
+        }
+        
+        // In case the value is previously saved in a comma separated format.
+        if (!is_array($options))
+        {
+            $options = explode(',', $options);
+        }
+
+        if (!method_exists($this, 'validateOptions'))
+        {
+            return $options;
+        }
+
+        // Remove empty and null items
+        $options = array_filter($options);
+
+        try
+        {
+            return $this->validateOptions($options);
+        }
+        catch (Exception $e)
+        {
+            echo $e->getMessage();
+        }
+    }
+
+    /**
+     * This method is called by the onAjax method and must return an array of arrays
+     *
+     * @return void
+     */
+    abstract protected function getItems();
+
+    abstract protected function getItemsTotal();
+}

plugins/system/nrframework/fields/akeebasubs.php

@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+// 
+defined('_JEXEC') or die;
+jimport('joomla.form.helper');
+JFormHelper::loadFieldClass('list');
+
+class JFormFieldAkeebaSubs extends JFormFieldList
+{
+    /**
+     * Method to get a list of options for a list input.
+     *
+     * @return      array           An array of JHtml options.
+     */
+    protected function getOptions() 
+    {
+        if (!NRFramework\Extension::isInstalled('akeebasubs'))
+        {
+            return;
+        }
+
+        $lists = $this->getLevels();
+
+        if (!count($lists))
+        {
+            return;
+        }
+
+        $options = array();
+
+        foreach ($lists as $option)
+        {
+            $options[] = JHTML::_('select.option', $option->id, $option->name);
+        }
+
+        return array_merge(parent::getOptions(), $options);
+    }
+
+    /**
+     *  Retrieve all Akeeba Subscription Levels
+     *
+     *  @return  array  Subscription Levels
+     */
+    private function getLevels()
+    {
+        // Get a db connection.
+        $db = JFactory::getDbo();
+        
+        $query = $db->getQuery(true)
+            ->select('l.akeebasubs_level_id as id, l.title AS name, l.enabled as published')
+            ->from('#__akeebasubs_levels AS l')
+            ->where('l.enabled > -1')
+            ->order('l.title, l.akeebasubs_level_id');
+        $db->setQuery($query);
+        
+        return $db->loadObjectList();
+    }
+}

plugins/system/nrframework/fields/assignmentselection.php

@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+defined('JPATH_PLATFORM') or die;
+
+use NRFramework\HTML;
+
+JFormHelper::loadFieldClass('list');
+
+class JFormFieldAssignmentSelection extends JFormFieldList
+{
+	/**
+	 *  Assignment options
+	 *
+	 *  @var  array
+	 */
+    protected $options = array(
+        0 => 'JDISABLED',
+        1 => 'NR_INCLUDE',
+        2 => 'NR_EXCLUDE'
+    );
+
+    /**
+     *  Return options list to field
+     *
+     *  @return  array
+     */
+    protected function getOptions()
+    {
+        foreach ($this->options as $key => $value)
+        {
+            $options[] = JHTML::_('select.option', $key, JText::_($value));
+        }
+
+        return array_merge(parent::getOptions(), $options);
+    }
+
+    /**
+     *  Setup field with predefined classes and load its media files
+     *
+     *  @param   SimpleXMLElement  $element  
+     *  @param   String            $value   
+     *  @param   String            $group    
+     *
+     *  @return  SimpleXMLElement                    
+     */
+    public function setup(SimpleXMLElement $element, $value, $group = NULL)
+    {
+        $return = parent::setup($element, $value, $group);
+
+        JHtml::_('jquery.framework');
+
+		HTML::script('plg_system_nrframework/assignmentselection.js');
+		HTML::stylesheet('plg_system_nrframework/assignmentselection.css');
+
+        $this->class = 'assignmentselection chzn-color-state';
+
+        return $return;
+    }
+}

plugins/system/nrframework/fields/block.php

@@ -0,0 +1,88 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+###### Note ######
+# This field is deprecated. Use NR_Well instead
+###### Note ######
+
+class JFormFieldNR_Block extends NRFormField
+{
+    /**
+     * The field type.
+     *
+     * @var         string
+     */
+    public $type = 'nr_block';
+
+    protected function getLabel()
+    {
+        return '';
+    }
+
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string  
+     */
+    protected function getInput()
+    {
+        JHtml::stylesheet('plg_system_nrframework/fields.css', false, true);
+
+        $title       = $this->get('label');
+        $description = $this->get('description');
+        $class       = $this->get('class');
+        $showclose   = $this->get('showclose', 0);
+        $start       = $this->get('start', 0);
+        $end         = $this->get('end', 0);
+        $info        = $this->get("html", null);
+
+        if ($info)
+        {
+            $info = str_replace("{{", "<", $info);
+            $info = str_replace("}}", ">", $info);       
+        }
+
+        $html = array();
+
+        if ($start || !$end)
+        {
+            $html[] = '</div>';
+
+            if (strpos($class, 'alert') !== false)
+            {
+                $html[] = '<div class="alert ' . $class . '">';
+            }
+            else
+            {
+                $html[] = '<div class="well nr-well' . $class . '">';
+            }
+            if ($title)
+            {
+                $html[] = '<h4>' . $this->prepareText($title) . '</h4>';
+            }
+            if ($description)
+            {
+                $html[] = '<div class="well-desc">' . $this->prepareText($description) . $info . '</div>';
+            }
+            $html[] = '<div><div>';
+        }
+
+        if (!$start && !$end)
+        {
+            $html[] = '</div>';
+        }
+
+        return '</div>' . implode('', $html);
+    }
+}

plugins/system/nrframework/fields/comparator.php

@@ -0,0 +1,68 @@
+<?php
+/**
+ * @author          Tassos.gr <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+JFormHelper::loadFieldClass('list');
+
+class JFormFieldComparator extends JFormFieldList
+{
+    private $defaults = [
+        'includes' => 'NR_IS',
+        'not_includes' => 'NR_IS_NOT'
+    ];
+
+    /**
+	 * Method to get the field input markup for a generic list.
+	 * Use the multiple attribute to enable multiselect.
+	 *
+	 * @return  string  The field input markup.
+	 */
+	protected function getInput()
+	{
+        $this->required = true;
+        $this->class .= ' comparator';
+
+        return parent::getInput();
+    }
+
+    /**
+     * Return the label.
+     * 
+     * @return  string
+     */
+    protected function getLabel()
+    {
+        if (!isset($this->element['label']))
+        {
+            $this->element['label'] = 'NR_MATCH';
+        }
+
+        return parent::getLabel();
+    }
+
+    /**
+     * Return the options.
+     * 
+     * @return  string
+     */
+    protected function getOptions()
+    {
+        if (!$options = parent::getOptions())
+        {
+            $options = $this->defaults;
+
+            foreach ($options as $key => &$value)
+            {
+                $value = JText::_($value);
+            }
+        }
+
+        return $options;
+    }
+}

plugins/system/nrframework/fields/componentitems.php

@@ -0,0 +1,208 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+use Joomla\Registry\Registry;
+
+require_once __DIR__ . '/ajaxify.php';
+
+/*
+ * Creates an AJAX-based dropdown
+ * https://select2.org/
+ */
+class JFormFieldComponentItems extends JFormFieldAjaxify
+{
+    /**
+     * Single items table name
+     *
+     * @var string
+     */
+    protected $table = 'content';
+
+    /**
+     * Primary key column of the single items table
+     *
+     * @var string
+     */
+    protected $column_id = 'id';
+
+    /**
+     * The title column of the single items table
+     *
+     * @var string
+     */
+    protected $column_title = 'title';
+
+    /**
+     * The state column of the single items table
+     *
+     * @var string
+     */
+    protected $column_state = 'state';
+
+    /**
+     * Pass extra where SQL statement
+     *
+     * @var string
+     */
+    protected $where;
+
+    /**
+     * The Joomla database object
+     *
+     * @var object
+     */
+    protected $db;
+
+	/**
+	 * Method to attach a JForm object to the field.
+	 *
+	 * @param   SimpleXMLElement  $element  The SimpleXMLElement object representing the `<field>` tag for the form field object.
+	 * @param   mixed             $value    The form field value to validate.
+	 * @param   string            $group    The field name group control value. This acts as an array container for the field.
+	 *                                      For example if the field has name="foo" and the group value is set to "bar" then the
+	 *                                      full field name would end up being "bar[foo]".
+	 *
+	 * @return  boolean  True on success.
+	 *
+	 * @since   3.2
+	 */
+    public function setup(SimpleXMLElement $element, $value, $group = null)
+    {
+		if ($return = parent::setup($element, $value, $group))
+		{
+            $this->init();
+        }
+        
+		return $return;
+    }
+
+    public function init()
+    {
+        $this->table = isset($this->element['table']) ? (string) $this->element['table'] : $this->table;
+
+        $this->column_id = isset($this->element['column_id']) ? (string) $this->element['column_id'] : $this->column_id;
+        $this->column_id = $this->prefix($this->column_id);
+
+        $this->column_title = isset($this->element['column_title']) ? (string) $this->element['column_title'] : $this->column_title;
+        $this->column_title = $this->prefix($this->column_title);
+
+        $this->column_state = isset($this->element['column_state']) ? (string) $this->element['column_state'] : $this->column_state;
+        $this->column_state = $this->prefix($this->column_state);
+
+        $this->where = isset($this->element['where']) ? (string) $this->element['where'] : null;
+        $this->join = isset($this->element['join']) ? (string) $this->element['join'] : null;
+
+        if (!isset($this->element['placeholder']))
+        {
+            $this->placeholder = (string) $this->element['description'];
+        }
+
+        // Initialize database Object
+        $this->db = JFactory::getDbo();
+    }
+
+    private function prefix($string)
+    {
+        if (strpos($string, '.') === false)
+        {
+            $string = 'i.' . $string;
+        }
+
+        return $string;
+    }
+
+    protected function getTemplateResult()
+    {
+        return '<span class="row-text">\' + state.text + \'</span><span style="float:right; opacity:.7">\' + state.id + \'</span>';
+    }
+
+    protected function getItemsQuery()
+    {
+        $db = $this->db;
+
+        $query = $this->getQuery()
+            ->order($db->quoteName($this->column_id) . ' DESC');
+
+        if ($this->limit > 0)
+        {
+            // Joomla uses offset
+            $page = $this->page - 1;
+
+            $query->setLimit($this->limit, $page * $this->limit);
+        }
+
+        return $query;
+    }
+
+    protected function getItems()
+    {
+        $db = $this->db;
+
+        $db->setQuery($this->getItemsQuery());
+        
+		return $db->loadObjectList();
+    }
+
+    protected function getItemsTotal()
+    {
+        $db = $this->db;
+
+        $query = $this->getQuery()
+            ->clear('select')
+            ->select('count(*)');
+        $db->setQuery($query);
+        
+		return (int) $db->loadResult();
+    }
+
+    protected function getQuery()
+    {
+        $db = $this->db;
+
+        $query = $db->getQuery(true)
+            ->select([
+                $db->quoteName($this->column_id, 'id'),
+                $db->quoteName($this->column_title, 'text'),
+                $db->quoteName($this->column_state, 'state')
+            ])
+            ->from($db->quoteName('#__' . $this->table, 'i'));
+
+        if (!empty($this->search_term))
+        {
+            $query->where($db->quoteName($this->column_title) . ' LIKE ' . $db->quote('%' . $this->search_term . '%'));
+        }
+
+        if ($this->join)
+        {
+            $query->join('INNER', $this->join);
+        }
+
+        if ($this->where)
+        {
+            $query->where($this->where);
+        }
+
+        return $query;
+    }
+
+    protected function validateOptions($options)
+    {
+        $db = $this->db;
+
+        $query = $this->getQuery()
+            ->where($db->quoteName($this->column_id) . ' IN (' . implode(',', $options) . ')');
+       
+        $db->setQuery($query);
+
+        return $db->loadAssocList('id', 'text');
+    }
+}

plugins/system/nrframework/fields/conditionbuilder.php

@@ -0,0 +1,78 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+use NRFramework\Conditions\ConditionBuilder;
+use NRFramework\Extension;
+
+JFormHelper::loadFieldClass('hidden');
+
+class JFormFieldConditionBuilder extends JFormFieldHidden
+{
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string
+     */
+    protected function getInput()
+    {
+       // Condition Builder relies on com_ajax for AJAX requests.
+       if (!Extension::componentIsEnabled('ajax'))
+       {
+           \JFactory::getApplication()->enqueueMessage(\JText::_('AJAX Component is not enabled.'), 'error');
+           return;
+       }
+
+        // This is required on views we don't control such as the Fields or the Modules view page.
+        JHtml::_('formbehavior.chosen', '.hasChosen');
+
+        JHtml::stylesheet('plg_system_nrframework/fields.css', ['relative' => true, 'version' => 'auto']);
+        JHtml::stylesheet('plg_system_nrframework/joomla' . (defined('nrJ4') ? '4' : '3') . '.css', ['relative' => true, 'version' => 'auto']);
+
+        \JText::script('NR_CB_SELECT_CONDITION_GET_STARTED');
+        \JText::script('NR_ARE_YOU_SURE_YOU_WANT_TO_DELETE_THIS_ITEM');
+
+        // Value must be always be a JSON string.
+        if (is_array($this->value))
+        {
+            $this->value = json_encode($this->value);
+        }
+
+        // If field is empty, initialize it with an empty Condition Group
+
+        $payload = [
+            'include_rules' => isset($this->getOptions()['include_rules']) ? ConditionBuilder::prepareXmlRulesList($this->getOptions()['include_rules']) : '',
+            'exclude_rules' => isset($this->getOptions()['exclude_rules']) ? ConditionBuilder::prepareXmlRulesList($this->getOptions()['exclude_rules']) : '',
+            'geo_modal' => ConditionBuilder::getGeoModal() // Out of context
+        ];
+
+        return '
+            <div class="cb-wrapper">
+                ' . parent::getInput() . ConditionBuilder::getLayout('conditionbuilder', $payload) . '
+            </div>
+        ';
+    }
+
+    /**
+     * Returns the field options.
+     * 
+     * @return  array
+     */
+    protected function getOptions()
+    {
+        $options = [
+            'include_rules' => (string) $this->element['include_rules'],
+            'exclude_rules' => (string) $this->element['exclude_rules']
+        ];
+        
+        return $options;
+    }
+}

plugins/system/nrframework/fields/content.php

@@ -0,0 +1,70 @@
+<?php 
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+defined('_JEXEC') or die;
+
+require_once dirname(__DIR__) . '/helpers/groupfield.php';
+
+class JFormFieldNR_Content extends NRFormGroupField
+{
+	public $type = 'Content';
+
+	public function getCategories()
+	{
+		$query = $this->db->getQuery(true)
+			->select('COUNT(c.id)')
+			->from('#__categories AS c')
+			->where('c.extension = ' . $this->db->quote('com_content'))
+			->where('c.parent_id > 0')
+			->where('c.published > -1');
+		$this->db->setQuery($query);
+		$total = $this->db->loadResult();
+
+		$options = array();
+		if ($this->get('show_ignore'))
+		{
+			if (in_array('-1', $this->value))
+			{
+				$this->value = array('-1');
+			}
+			$options[] = JHtml::_('select.option', '-1', '- ' . JText::_('NR_IGNORE') . ' -', 'value', 'text', 0);
+			$options[] = JHtml::_('select.option', '-', '&nbsp;', 'value', 'text', 1);
+		}
+
+		$query->clear('select')
+			->select('c.id, c.title as name, c.level, c.published, c.language')
+			->order('c.lft');
+
+		$this->db->setQuery($query);
+		$list = $this->db->loadObjectList();
+
+		$options = array_merge($options, $this->getOptionsByList($list, array('language'), -1));
+
+		return $options;
+	}
+
+	public function getItems()
+	{
+		$query = $this->db->getQuery(true)
+			->select('COUNT(i.id)')
+			->from('#__content AS i')
+			->where('i.access > -1');
+		$this->db->setQuery($query);
+		$total = $this->db->loadResult();
+
+		$query->clear('select')
+			->select('i.id, i.title as name, i.language, c.title as cat, i.access as published')
+			->join('LEFT', '#__categories AS c ON c.id = i.catid')
+			->order('i.title, i.ordering, i.id');
+		$this->db->setQuery($query);
+		$list = $this->db->loadObjectList();
+
+		return $this->getOptionsByList($list, array('language', 'cat', 'id'));
+	}
+}

plugins/system/nrframework/fields/currencies.php

@@ -0,0 +1,210 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+require_once JPATH_PLUGINS . '/system/nrframework/helpers/fieldlist.php';
+
+class JFormFieldNR_Currencies extends NRFormFieldList
+{
+	public $currencies = array(
+		"AED" => "United Arab Emirates Dirham",
+		"AFN" => "Afghan Afghani",
+		"ALL" => "Albanian Lek",
+		"AMD" => "Armenian Dram",
+		"ANG" => "Netherlands Antillean Guilder",
+		"AOA" => "Angolan Kwanza",
+		"ARS" => "Argentine Peso",
+		"AUD" => "Australian Dollar",
+		"AWG" => "Aruban Florin",
+		"AZN" => "Azerbaijani Manat",
+		"BAM" => "Bosnia-Herzegovina Convertible Mark",
+		"BBD" => "Barbadian Dollar",
+		"BDT" => "Bangladeshi Taka",
+		"BGN" => "Bulgarian Lev",
+		"BHD" => "Bahraini Dinar",
+		"BIF" => "Burundian Franc",
+		"BMD" => "Bermudan Dollar",
+		"BND" => "Brunei Dollar",
+		"BOB" => "Bolivian Boliviano",
+		"BRL" => "Brazilian Real",
+		"BSD" => "Bahamian Dollar",
+		"BTC" => "Bitcoin",
+		"BTN" => "Bhutanese Ngultrum",
+		"BWP" => "Botswanan Pula",
+		"BYN" => "Belarusian Ruble",
+		"BYR" => "Belarusian Ruble (pre-2016)",
+		"BZD" => "Belize Dollar",
+		"CAD" => "Canadian Dollar",
+		"CDF" => "Congolese Franc",
+		"CHF" => "Swiss Franc",
+		"CLF" => "Chilean Unit of Account (UF)",
+		"CLP" => "Chilean Peso",
+		"CNY" => "Chinese Yuan",
+		"COP" => "Colombian Peso",
+		"CRC" => "Costa Rican Colón",
+		"CUC" => "Cuban Convertible Peso",
+		"CUP" => "Cuban Peso",
+		"CVE" => "Cape Verdean Escudo",
+		"CZK" => "Czech Republic Koruna",
+		"DJF" => "Djiboutian Franc",
+		"DKK" => "Danish Krone",
+		"DOP" => "Dominican Peso",
+		"DZD" => "Algerian Dinar",
+		"EEK" => "Estonian Kroon",
+		"EGP" => "Egyptian Pound",
+		"ERN" => "Eritrean Nakfa",
+		"ETB" => "Ethiopian Birr",
+		"EUR" => "Euro",
+		"FJD" => "Fijian Dollar",
+		"FKP" => "Falkland Islands Pound",
+		"GBP" => "British Pound Sterling",
+		"GEL" => "Georgian Lari",
+		"GGP" => "Guernsey Pound",
+		"GHS" => "Ghanaian Cedi",
+		"GIP" => "Gibraltar Pound",
+		"GMD" => "Gambian Dalasi",
+		"GNF" => "Guinean Franc",
+		"GTQ" => "Guatemalan Quetzal",
+		"GYD" => "Guyanaese Dollar",
+		"HKD" => "Hong Kong Dollar",
+		"HNL" => "Honduran Lempira",
+		"HRK" => "Croatian Kuna",
+		"HTG" => "Haitian Gourde",
+		"HUF" => "Hungarian Forint",
+		"IDR" => "Indonesian Rupiah",
+		"ILS" => "Israeli New Sheqel",
+		"IMP" => "Manx pound",
+		"INR" => "Indian Rupee",
+		"IQD" => "Iraqi Dinar",
+		"IRR" => "Iranian Rial",
+		"ISK" => "Icelandic Króna",
+		"JEP" => "Jersey Pound",
+		"JMD" => "Jamaican Dollar",
+		"JOD" => "Jordanian Dinar",
+		"JPY" => "Japanese Yen",
+		"KES" => "Kenyan Shilling",
+		"KGS" => "Kyrgystani Som",
+		"KHR" => "Cambodian Riel",
+		"KMF" => "Comorian Franc",
+		"KPW" => "North Korean Won",
+		"KRW" => "South Korean Won",
+		"KWD" => "Kuwaiti Dinar",
+		"KYD" => "Cayman Islands Dollar",
+		"KZT" => "Kazakhstani Tenge",
+		"LAK" => "Laotian Kip",
+		"LBP" => "Lebanese Pound",
+		"LKR" => "Sri Lankan Rupee",
+		"LRD" => "Liberian Dollar",
+		"LSL" => "Lesotho Loti",
+		"LTL" => "Lithuanian Litas",
+		"LVL" => "Latvian Lats",
+		"LYD" => "Libyan Dinar",
+		"MAD" => "Moroccan Dirham",
+		"MDL" => "Moldovan Leu",
+		"MGA" => "Malagasy Ariary",
+		"MKD" => "Macedonian Denar",
+		"MMK" => "Myanma Kyat",
+		"MNT" => "Mongolian Tugrik",
+		"MOP" => "Macanese Pataca",
+		"MRO" => "Mauritanian Ouguiya",
+		"MTL" => "Maltese Lira",
+		"MUR" => "Mauritian Rupee",
+		"MVR" => "Maldivian Rufiyaa",
+		"MWK" => "Malawian Kwacha",
+		"MXN" => "Mexican Peso",
+		"MYR" => "Malaysian Ringgit",
+		"MZN" => "Mozambican Metical",
+		"NAD" => "Namibian Dollar",
+		"NGN" => "Nigerian Naira",
+		"NIO" => "Nicaraguan Córdoba",
+		"NOK" => "Norwegian Krone",
+		"NPR" => "Nepalese Rupee",
+		"NZD" => "New Zealand Dollar",
+		"OMR" => "Omani Rial",
+		"PAB" => "Panamanian Balboa",
+		"PEN" => "Peruvian Nuevo Sol",
+		"PGK" => "Papua New Guinean Kina",
+		"PHP" => "Philippine Peso",
+		"PKR" => "Pakistani Rupee",
+		"PLN" => "Polish Zloty",
+		"PYG" => "Paraguayan Guarani",
+		"QAR" => "Qatari Rial",
+		"RON" => "Romanian Leu",
+		"RSD" => "Serbian Dinar",
+		"RUB" => "Russian Ruble",
+		"RWF" => "Rwandan Franc",
+		"SAR" => "Saudi Riyal",
+		"SBD" => "Solomon Islands Dollar",
+		"SCR" => "Seychellois Rupee",
+		"SDG" => "Sudanese Pound",
+		"SEK" => "Swedish Krona",
+		"SGD" => "Singapore Dollar",
+		"SHP" => "Saint Helena Pound",
+		"SLL" => "Sierra Leonean Leone",
+		"SOS" => "Somali Shilling",
+		"SRD" => "Surinamese Dollar",
+		"STD" => "São Tomé and Príncipe Dobra",
+		"SVC" => "Salvadoran Colón",
+		"SYP" => "Syrian Pound",
+		"SZL" => "Swazi Lilangeni",
+		"THB" => "Thai Baht",
+		"TJS" => "Tajikistani Somoni",
+		"TMT" => "Turkmenistani Manat",
+		"TND" => "Tunisian Dinar",
+		"TOP" => "Tongan Pa?anga",
+		"TRY" => "Turkish Lira",
+		"TTD" => "Trinidad and Tobago Dollar",
+		"TWD" => "New Taiwan Dollar",
+		"TZS" => "Tanzanian Shilling",
+		"UAH" => "Ukrainian Hryvnia",
+		"UGX" => "Ugandan Shilling",
+		"USD" => "United States Dollar",
+		"UYU" => "Uruguayan Peso",
+		"UZS" => "Uzbekistan Som",
+		"VEF" => "Venezuelan Bolívar Fuerte",
+		"VND" => "Vietnamese Dong",
+		"VUV" => "Vanuatu Vatu",
+		"WST" => "Samoan Tala",
+		"XAF" => "CFA Franc BEAC",
+		"XAG" => "Silver Ounce",
+		"XAU" => "Gold Ounce",
+		"XCD" => "East Caribbean Dollar",
+		"XDR" => "Special Drawing Rights",
+		"XOF" => "CFA Franc BCEAO",
+		"XPD" => "Palladium Ounce",
+		"XPF" => "CFP Franc",
+		"XPT" => "Platinum Ounce",
+		"YER" => "Yemeni Rial",
+		"ZAR" => "South African Rand",
+		"ZMK" => "Zambian Kwacha (pre-2013)",
+		"ZMW" => "Zambian Kwacha",
+		"ZWL" => "Zimbabwean Dollar",
+	);
+
+	protected function getOptions()
+	{
+		$options = array();
+
+		if ($this->showSelect())
+		{
+			$options[] = JHTML::_('select.option', "", "- " . JText::_("NR_SELECT_CURRENCY"). " -");
+		}
+
+		asort($this->currencies);
+
+		foreach ($this->currencies as $key => $value)
+		{
+			$options[] = JHTML::_('select.option', $key, $key . " (" . $value . ")");
+		}
+
+		return array_merge(parent::getOptions(), $options);
+	}
+}

plugins/system/nrframework/fields/freetext.php

@@ -0,0 +1,68 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+class JFormFieldNR_Freetext extends NRFormField
+{
+    /**
+     * The field type.
+     *
+     * @var         string
+     */
+    public $type = 'freetext';
+
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string  
+     */
+    protected function getInput()
+    {   
+        $file  = $this->get("file", false);
+        $text  = $this->get("text", false);
+        $label = $this->get("label", false);
+
+        if (!$label)
+        {
+            $html[] = '</div><div class="freetext '.$this->get("class").'">';
+        }
+
+        if ($file)
+        {
+            $html[] = $this->renderContent($this->get("file"), $this->get("path"), $this);        
+        }
+
+        if ($text)
+        {
+            $html[] = $this->prepareText($text);
+        }
+
+        return implode(" ", $html);
+    }
+
+    /**
+     *  Render PHP file with data
+     *
+     *  @param   string  $file         The file name
+     *  @param   string  $path         The pathname
+     *  @param   mixed   $displayData  The data object passed to template file
+     *
+     *  @return  string                HTML rendered
+     */
+    private function renderContent($file, $path, $displayData = null) 
+    {
+        $layout = new JLayoutFile($file, JPATH_SITE . $path, array('debug' => 0));
+        return $layout->render($displayData);
+    }
+
+}

plugins/system/nrframework/fields/geo.php

@@ -0,0 +1,84 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+require_once JPATH_PLUGINS . '/system/nrframework/helpers/fieldlist.php';
+
+class JFormFieldNR_Geo extends NRFormFieldList
+{
+	private $list;
+
+	protected function getInput()
+	{
+		if ($this->get('detect_visitor_country', false) && empty($this->value) && $countryCode = $this->getVisitorCountryCode())
+		{
+			$this->value = $countryCode;
+		}
+
+		return parent::getInput();
+	}
+
+	protected function getOptions()
+	{
+		switch ($this->get('geo'))
+		{
+			case 'continents':
+				$this->list = \NRFramework\Continents::getContinentsList();
+				$selectLabel = 'NR_SELECT_CONTINENT';
+				break;
+            default:
+				$this->list = \NRFramework\Countries::getCountriesList();
+				$selectLabel = 'NR_SELECT_COUNTRY';
+				break;
+		}
+
+		if ($this->get('use_label_as_value', false))
+		{
+			$this->list = array_combine($this->list, $this->list);
+		}
+
+		$options = array();
+
+		if ($this->get("showselect", 'true') === 'true')
+		{
+			$options[] = JHTML::_('select.option', "", "- " . JText::_($selectLabel) . " -");
+		}
+
+		foreach ($this->list as $key => $value)
+		{
+			$options[] = JHTML::_('select.option', $key, $value);
+		}
+
+		return array_merge(parent::getOptions(), $options);
+	}
+
+    /**
+     *  Detect visitor's country
+     *
+     *  @return  string   The visitor's country code (GR)
+     */
+    private function getVisitorCountryCode()
+    {
+    	$path = JPATH_PLUGINS . '/system/tgeoip/';
+
+    	if (!\JFolder::exists($path))
+    	{
+    		return;
+    	}
+
+    	if (!class_exists('TGeoIP'))
+    	{
+        	@include_once $path . 'vendor/autoload.php';
+        	@include_once $path . 'helper/tgeoip.php';
+    	}
+
+        $geo = new \TGeoIP();
+        return $geo->getCountryCode();
+    }
+}

plugins/system/nrframework/fields/geodbchecker.php

@@ -0,0 +1,84 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+class JFormFieldGeoDBChecker extends JFormField
+{
+    /**
+     * Whether TGeoIP is disabled or not.
+     * 
+     * @var  boolean
+     */
+    private $tgeoip_plugin_disabled = false;
+    
+    protected function getLabel()
+    {
+        return;
+    }
+
+	/**
+	 * Renders the field.
+	 *
+	 * @param   array   $options
+	 *
+	 * @return  string
+	 */
+	public function renderField($options = [])
+	{
+        // Check if TGeoIP plugin is enabled
+        if (!\NRFramework\Extension::pluginIsEnabled('tgeoip'))
+        {
+            $this->tgeoip_plugin_disabled = true;
+            return parent::renderField($options);
+        }
+        
+        // Do not render the field if the database is up-to-date
+        if (!\NRFramework\Extension::geoPluginNeedsUpdate())
+        {
+            return;
+        }
+
+		return parent::renderField($options);
+	}
+
+    /**
+     * Shows a warning message when the Geolocation plugin is disabled.
+     * 
+     * @return  string
+     */
+    private function disabledPluginWarning()
+    {
+        return '<div class="alert alert-warning geo-db-checker" style="margin-top: 0; margin-bottom: 0;">' .
+            '<h3 style="margin-top:0;">' . JText::sprintf('NR_GEO_PLUGIN_DISABLED') . '</h3>' .
+            '<p>' . JText::sprintf('NR_GEO_PLUGIN_DISABLED_DESC', '<a href="' . JRoute::_('index.php?option=com_plugins&view=plugins&filter' . (defined('nrJ4') ? '[search]' : '_search') . '=System - Tassos.gr GeoIP Plugin') . '" target="_blank">', '</a>') . '</p>' .
+        '</div>';
+    }
+
+    /**
+     * If the geolocation database is missing or its outdated, then display a helpful message
+     * to the usser notifying them that they need to update.
+     *
+     * @return  string
+     */
+    protected function getInput()
+    {
+        if ($this->tgeoip_plugin_disabled)
+        {
+            return $this->disabledPluginWarning();
+        }
+        
+        return '<div class="alert alert-info" style="margin: 0;">' .
+            '<h3 style="margin-top:0;">' . JText::sprintf('NR_GEO_MAINTENANCE') . '</h3>' .
+            '<p>' . JText::sprintf('NR_GEO_MAINTENANCE_DESC') . '</p>' .
+            '<a class="btn btn-success" data-toggle="modal" data-bs-toggle="modal" href="#tf-geodbchecker-modal"><span class="icon-refresh"></span> Update Database</a>' .
+        '</div>';
+    }
+}

plugins/system/nrframework/fields/gmap.php

@@ -0,0 +1,86 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+use NRFramework\HTML;
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+class JFormFieldNR_Gmap extends NRFormField
+{
+	/**
+	 *  The default Google Maps API Key
+	 *
+	 *  @var  string
+	 */
+	public $defaultAPIKey = 'AIzaSyAPgVu1A9L7_q0gtYToFeJiUHDSCCXYZKI';
+
+	/**
+	 * Method to get the field input markup.
+	 *
+	 * @return  string  The field input markup.
+	 */
+	public function getInput()
+	{
+		// Setup properties
+		$this->width    = $this->get('width', '500px');
+		$this->height   = $this->get('height', '400px');
+		$this->zoom     = $this->get('zoom', '10');
+		$this->margin   = $this->get('margin', '0 0 10px 0');
+		$this->readonly = $this->get('readonly', false) ? 'readonly' : '';
+		$this->value    = $this->checkCoordinates($this->value, null) ? $this->value : $this->get('default', '36.892587, 27.287793');
+		$this->hint     = $this->prepareText($this->get('hint', 'NR_ENTER_COORDINATES'));
+
+		// Add scripts to DOM
+		JHtml::_('jquery.framework');
+		JFactory::getDocument()->addScript('//maps.googleapis.com/maps/api/js?key=' . $this->getAPIKey());
+		HTML::script('plg_system_nrframework/field.gmap.js');
+		Jtext::script('NR_WRONG_COORDINATES');
+
+		// Add styles to DOM
+		$this->doc->addStyleDeclaration('
+			#' . $this->id . '_map { 
+				height: ' . $this->height . ';
+				width:  ' . $this->width  . ';
+				margin: ' . $this->margin . ';
+			}
+		');
+
+		return '<div id="' . $this->id . '_map"></div><input type="text" name="' . $this->name . '" class="form-control ' . $this->class . ' nr_gmap" id="' . $this->id . '" value="' . $this->value . '" placeholder="' . $this->hint . '" data-zoom="' . $this->zoom . '" ' . $this->readonly . '/>';
+	}
+
+	/**
+	 * Checks the validity of the coordinates
+	 */
+	private function checkCoordinates($coordinates)
+	{
+		return (preg_match("/^[-+]?([1-8]?\d(\.\d+)?|90(\.0+)?),\s*[-+]?(180(\.0+)?|((1[0-7]\d)|([1-9]?\d))(\.\d+)?)$/", $coordinates));
+	}
+
+	/**
+	 *  Get the Google Maps API Key. 
+	 *  If no key is found in the framework options then the default API Key will be used instead.
+	 *  
+	 *  We should update the default API Key once a while.
+	 *
+	 *  @return  string
+	 */
+	private function getAPIKey()
+	{
+		if (!$framework = JPluginHelper::getPlugin('system', 'nrframework'))
+		{
+			return $this->defaultAPIKey;
+		}
+		
+		// Get plugin params
+		$params = new JRegistry($framework->params);
+		return $params->get('gmapkey', $this->defaultAPIKey);
+	}
+}

plugins/system/nrframework/fields/inline.php

@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+class JFormFieldNR_Inline extends NRFormField
+{
+	/**
+	 *  Method to render the input field
+	 *
+	 *  @return  string
+	 */
+	protected function getInput()
+	{
+		JHtml::stylesheet('plg_system_nrframework/inline-control-group.css', ['relative' => true, 'version' => 'auto']);
+
+		$start = $this->get('start', 1);
+		$end   = $this->get('end', 0);
+
+		if ($start && !$end)
+		{
+			return '<div class="inline-control-group '.$this->get('class').'"><div><div>';
+		}
+
+		return '</div></div></div>';
+	}
+}

plugins/system/nrframework/fields/jshoppingcomponentitems.php

@@ -0,0 +1,44 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+use Joomla\Registry\Registry;
+
+require_once __DIR__ . '/componentitems.php';
+
+class JFormFieldJShoppingComponentItems extends JFormFieldComponentItems
+{
+    public function init()
+    {
+        // Get default language
+        $this->element['column_title'] = 'name_' . $this->getLanguage();
+
+        parent::init();
+    }
+
+	/**
+     *  JoomShopping is using different columns per language. Therefore, we need to use their API to get the default language code.
+     *
+     *  @return  string
+     */
+    private function getLanguage($default = 'en-GB')
+    {	
+		// Silent inclusion.
+        @include_once JPATH_SITE . '/components/com_jshopping/lib/factory.php';
+
+        if (!class_exists('JSFactory'))
+        {
+            return $default;
+        }
+
+		return JSFactory::getConfig()->defaultLanguage;
+    }
+}

plugins/system/nrframework/fields/modules.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+require_once JPATH_PLUGINS . '/system/nrframework/helpers/fieldlist.php';
+
+class JFormFieldModules extends NRFormFieldList
+{
+    /**
+     * Method to get a list of options for a list input.
+     *
+     * @return   array   An array of JHtml options.
+     */
+    protected function getOptions()
+    {
+        $db = $this->db;
+        
+        $query = $db->getQuery(true);
+        
+        $query->select('*')
+        ->from('#__modules')
+        ->where('published=1')
+        ->where('access !=3')
+        ->order('title');
+        
+        $client = isset($this->element['client']) ? (int) $this->element['client'] : false;
+
+        if ($client !== false)
+        {
+            $query->where('client_id = ' . $client);
+        }
+
+        $rows = $db->setQuery($query);
+        $results = $db->loadObjectList();
+
+        $options = array();
+
+        if ($this->showSelect())
+        {
+            $options[] = JHTML::_('select.option', "", '- ' . JText::_("NR_SELECT_MODULE") . ' -');
+        }
+
+        foreach ($results as $option)
+        {
+            $options[] = JHTML::_('select.option', $option->id, $option->title);
+        }
+
+        $options = array_merge(parent::getOptions(), $options);
+
+        return $options;
+    }
+}

plugins/system/nrframework/fields/nrbrowser.php

@@ -0,0 +1,40 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+require_once JPATH_PLUGINS . '/system/nrframework/helpers/fieldlist.php';
+
+class JFormFieldNRBrowser extends NRFormFieldList
+{
+	/**
+	 *  Browsers List
+	 *
+	 *  @var  array
+	 */
+	public $options = array(
+		'chrome'  => 'NR_CHROME',
+		'firefox' => 'NR_FIREFOX',
+		'edge'    => 'NR_EDGE',
+		'ie'      => 'NR_IE',
+		'safari'  => 'NR_SAFARI',
+		'opera'   => 'NR_OPERA'
+	);
+
+	protected function getOptions()
+	{
+		asort($this->options);
+
+		foreach ($this->options as $key => $option)
+		{
+			$options[] = JHTML::_('select.option', $key, JText::_($option));
+		}
+
+		return array_merge(parent::getOptions(), $options);
+	}
+}

plugins/system/nrframework/fields/nrchainedfields.php

@@ -0,0 +1,392 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+use Joomla\Registry\Registry;
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+class JFormFieldNRChainedFields extends NRFormField
+{
+	/**
+	 * All CSV choices.
+	 * 
+	 * @var  array
+	 */
+	protected $choices = [];
+
+	/**
+	 * The separator used in the CSV file.
+	 * 
+	 * @var  string
+	 */
+	protected $separator = ',';
+
+	/**
+	 * The data source contents.
+	 * 
+	 * @var  string
+	 */
+	protected $dataset = '';
+	
+	/**
+	 * Method to get the field input markup.
+	 *
+	 * @return  string  The field input markup.
+	 */
+	protected function getInput()
+	{
+		$layout = new \JLayoutFile('chainedfields', JPATH_PLUGINS . '/system/nrframework/layouts');
+
+		$data_source = $this->get('data_source', 'custom');
+
+		switch ($data_source)
+		{
+			case 'custom':
+				$this->dataset = $this->get('data_source_custom', '');
+				break;
+
+			case 'csv_file':
+				$csv_file = $this->get('data_source_csv', '');
+
+				if (!file_exists($csv_file))
+				{
+					return;
+				}
+				
+				$this->dataset = $csv_file;
+				break;
+		}
+
+		$this->separator = $this->get('separator', ',');
+
+		$data = [
+			'csv' => $this->dataset,
+			'data_source' => $data_source,
+			'value' => $this->getValue(),
+			'data' => $this->getData()
+		];
+
+		return $layout->render($data);
+	}
+
+	/**
+	 * Returns the field value.
+	 * 
+	 * @return  mixed
+	 */
+	private function getValue()
+	{
+		if (!$this->value)
+		{
+			return null;
+		}
+
+		if (!$this->choices = \NRFramework\Helpers\ChainedFields::loadCSV($this->dataset, $this->get('data_source', 'custom'), $this->separator, $this->id . '_', $this->name))
+		{
+			return null;
+		}
+
+		$choices = $this->choices['inputs'];
+
+		// Ensure the value is in correct format when used as plain field or in subform
+		$this->value = array_values((array) $this->value);
+
+		foreach ($this->choices['inputs'] as $key => $input)
+		{
+			$choices[$key]['choices'] = $this->getSelectedChoices($key, $this->value, $input);
+		}
+
+		return $choices;
+	}
+
+	/**
+	 * Finds the choices of the select.
+	 * 
+	 * @param   string  $key
+	 * @param   array   $value
+	 * @param   array   $input
+	 * 
+	 * @return  mixed
+	 */
+	private function getSelectedChoices($key, $value, $input)
+	{
+		$choices = $this->getSelectChoices($value, $input['id']);
+
+		if (!is_array($choices))
+		{
+			return null;
+		}
+
+		// set selected options based on value
+		foreach ($choices as $_key => &$choice)
+		{
+			if (!isset($value[$key]) || $choice['value'] !== $value[$key])
+			{
+				continue;
+			}
+
+			$choice['isSelected'] = true;
+		}
+
+		return $choices;
+	}
+
+    /**
+     * Handles the AJAX request.
+	 * 
+	 * Runs when select a value from a select field.
+     *
+     * @param   array    $options
+     *
+     * @return  array
+     */
+    public function onAjax($options)
+    {
+		$options = new Registry($options);
+	
+		if (!$select_id = $options->get('select_id'))
+		{
+            echo json_encode([
+				'error' => true,
+				'response' => \JText::_('NR_CANNOT_PROCESS_REQUEST')
+			]);
+			jexit();
+		}
+
+		if (!$value = $options->get('value'))
+		{
+            echo json_encode([
+				'error' => true,
+				'response' => \JText::_('NR_CANNOT_PROCESS_REQUEST')
+			]);
+			jexit();
+		}
+
+		if (!$value = json_decode($options->get('value'), true))
+		{
+            echo json_encode([
+				'error' => true,
+				'response' => \JText::_('NR_CANNOT_PROCESS_REQUEST')
+			]);
+			jexit();
+		}
+
+		if (!$data_source = $options->get('data_source'))
+		{
+            echo json_encode([
+				'error' => true,
+				'response' => \JText::_('NR_CANNOT_PROCESS_REQUEST')
+			]);
+			jexit();
+		}
+
+		if (!$csv = $options->get('csv'))
+		{
+            echo json_encode([
+				'error' => true,
+				'response' => \JText::_('NR_CANNOT_PROCESS_REQUEST')
+			]);
+			jexit();
+		}
+
+		$csv = json_decode($csv, true);
+
+		// get field ID from select ID
+		$id = preg_replace('/_[0-9]+$/', '', $select_id);
+
+		if (!$id || !$select_id || !$value || !$csv)
+		{
+            echo json_encode([
+				'error' => true,
+				'response' => \JText::_('NR_CANNOT_PROCESS_REQUEST')
+			]);
+			jexit();
+		}
+
+		$this->id = $id;
+
+		// get all CSV data
+		if (!$this->choices = \NRFramework\Helpers\ChainedFields::loadCSV($csv, $data_source, $this->separator, $this->id . '_', $this->name))
+		{
+            echo json_encode([
+				'error' => true,
+				'response' => \JText::_('NR_CANNOT_PROCESS_REQUEST')
+			]);
+			jexit();
+		}
+
+		// find next select options
+		$this->findNextOptions($id, $select_id, $value);
+	}
+
+	/**
+	 * Finds the options of the next select.
+	 * 
+	 * @param   string  $id
+	 * @param   string  $select_id
+	 * @param   array   $value
+	 * 
+	 * @return  void
+	 */
+	private function findNextOptions($id, $select_id, $value)
+	{
+		// find next ID
+		$next_select_id = $this->getNextSelectID($id, $select_id);
+
+		// get next choices
+		$choices = $next_select_id ? $this->getSelectChoices($value, $next_select_id) : [];
+
+		echo json_encode([
+			'error' => false,
+			'response' => $choices
+		]);
+		jexit();
+	}
+
+	/**
+	 * Returns the select choices.
+	 * 
+	 * @param   array    $field_value
+	 * @param   string   $select_id
+	 * @param   integer  $depth
+	 * @param   array    $choices
+	 * @param   array    $full_field_value
+	 * 
+	 * @return  array
+	 */
+	private function getSelectChoices($field_value = null, $select_id = null, $depth = null, $choices = null, $full_field_value = null)
+	{
+		$full_field_value = $full_field_value !== null ? $full_field_value : $field_value;
+		$value            = array_shift($field_value);
+		$index            = $select_id ? $this->getSelectID($select_id) : 1;
+		$depth            = $depth ? $depth : 1;
+		$choices          = $choices === null ? $this->choices['choices'] : (empty($choices) ? [] : $choices);
+		$select_choices   = [];
+
+		if ($depth == $index)
+		{
+			$select_choices = $choices;
+		}
+		else
+		{
+			foreach ($choices as $choice)
+			{
+				if ($choice['value'] !== $value)
+				{
+					continue;
+				}
+
+				$select_choices = $this->getSelectChoices($field_value, $select_id, $depth + 1, !empty($choice['choices']) ? $choice['choices'] : [], $full_field_value);
+				break;
+			}
+		}
+
+		if (empty($select_choices) && $this->getPreviousSelectValue($select_id, $full_field_value))
+		{
+			$select_choices = [
+				[
+					'text'       => 'No options',
+					'value'      => '',
+					'isSelected' => true
+				]
+			];
+		}
+
+		return $select_choices;
+	}
+
+	/**
+	 * Returns the previous select value
+	 * 
+	 * @param   string  $select_id
+	 * @param   string  $full_field_value
+	 * 
+	 * @return  string
+	 */
+	public function getPreviousSelectValue($select_id, $full_field_value)
+	{
+		$explode = explode('_', $select_id);
+
+		$input_id = $explode[count($explode) - 1];
+		$field_id = rtrim($select_id, '_' . $input_id);
+
+		$prev_input_id = sprintf('%s.%s', $field_id, $input_id - 1);
+		$prev_input_value = isset($full_field_value[$prev_input_id]) ? $full_field_value[$prev_input_id] : null;
+
+		return $prev_input_value;
+	}
+
+	/**
+	 * Finds the next select ID
+	 * 
+	 * @param   string  $base_id
+	 * @param   string  $select_id
+	 * 
+	 * @return  mixed
+	 */
+	public function getNextSelectID($base_id, $select_id)
+	{
+		$id = $this->getSelectID($select_id);
+		$next_id = $id + 1;
+
+		if ($next_id % 10 == 0)
+		{
+			$next_id++;
+		}
+
+		$next_select_id = sprintf('%s_%d', $base_id, $next_id);
+
+		foreach ($this->choices['inputs'] as $input)
+		{
+			if ($input['id'] != $next_select_id)
+			{
+				continue;
+			}
+
+			return $next_select_id;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Gets the ID (index) of the select by its ID.
+	 * 
+	 * @param   string  $select_id
+	 * 
+	 * @return  int
+	 */
+	public function getSelectID($select_id)
+	{
+		$explode = explode('_', $select_id);
+
+		return (int) array_pop($explode);
+	}
+
+	/**
+	 * Fetches all CSV data.
+	 * 
+	 * @return  array
+	 */
+	private function getData()
+	{
+		if (!$this->dataset)
+		{
+			return [];
+		}
+
+		if (!$choices = \NRFramework\Helpers\ChainedFields::loadCSV($this->dataset, $this->get('data_source', 'csv_file'), $this->separator, $this->id . '_', $this->name))
+		{
+			return [];
+		}
+
+		return $choices;
+	}
+}

plugins/system/nrframework/fields/nrcomponents.php

@@ -0,0 +1,130 @@
+<?php
+/**
+ * @author          Tassos.gr <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+jimport('joomla.filesystem.folder');
+jimport('joomla.filesystem.file');
+
+class JFormFieldNRComponents extends JFormFieldList
+{
+    protected function getOptions()
+    {
+        return array_merge(parent::getOptions(), $this->getInstalledComponents());
+    }
+
+	/**
+	 *  Method to get field parameters
+	 *
+	 *  @param   string  $val      Field parameter
+	 *  @param   string  $default  The default value
+	 *
+	 *  @return  string
+	 */
+	public function get($val, $default = '')
+	{
+		return (isset($this->element[$val]) && (string) $this->element[$val] != '') ? (string) $this->element[$val] : $default;
+	}
+    
+    /**
+     *  Creates a list of installed components
+     *
+     *  @return array
+     */
+    protected function getInstalledComponents()
+    {
+        $lang = JFactory::getLanguage();
+        $db   = JFactory::getDbo();
+
+        $components = $db->setQuery(
+            $db->getQuery(true)
+                ->select('name, element')
+                ->from('#__extensions')
+                ->where('type = ' . $db->quote('component'))
+                ->where('name != ""')
+                ->where('element != ""')
+                ->where('enabled = 1')
+                ->order('element, name')
+        )->loadObjectList();
+
+        $comps = array();
+
+        foreach ($components as $component)
+        {
+            // Make sure we have a valid element
+            if (empty($component->element))
+            {
+                continue;
+            }
+
+            // Skip backend-based only components
+            if ($this->get('frontend', false))
+            {
+                $component_folder = JPATH_SITE . '/components/' . $component->element;
+
+                if (!\JFolder::exists($component_folder))
+                {
+                    continue;
+                }
+
+                if (!\JFolder::exists($component_folder . '/views') && 
+                    !\JFolder::exists($component_folder . '/View')  && 
+                    !\JFolder::exists($component_folder . '/view'))
+                {
+                    continue;
+                }
+            }
+
+            // Try loading component's system language file in order to display a user friendly component name
+            // Runs only if the component's name is not translated already.
+            if (strpos($component->name, ' ') === false)
+            {   
+                $filenames = [
+                    $component->element . '.sys',
+                    $component->element
+                ];
+
+                $paths = [
+                    JPATH_ADMINISTRATOR,
+                    JPATH_ADMINISTRATOR . '/components/' . $component->element,
+                    JPATH_SITE,
+                    JPATH_SITE . '/components/' . $component->element
+                ];
+
+                foreach ($filenames as $key => $filename)
+                {
+                    foreach ($paths as $key => $path)
+                    {
+                        $loaded = $lang->load($filename, $path, null) || $lang->load($filename, $path, $lang->getDefault());
+
+                        if ($loaded)
+                        {
+                            break 2;
+                        }
+                    }
+                }
+
+                // Translate component's name
+                $component->name = JText::_(strtoupper($component->name));
+            }
+
+            $comps[strtolower($component->element)] = $component->name;
+        }
+
+        asort($comps);
+
+        $options = array();
+
+        foreach ($comps as $key => $name)
+        {
+            $options[] = JHtml::_('select.option', $key, $name);
+        }
+
+        return $options;
+    }
+}

plugins/system/nrframework/fields/nrconditions.php

@@ -0,0 +1,179 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+use NRFramework\Extension;
+
+JFormHelper::loadFieldClass('groupedlist');
+
+class JFormFieldNRConditions extends JFormFieldGroupedList
+{
+	/**
+     * List of available conditions
+     *
+     * @var array
+     */
+    public static $conditions = [
+		'NR_DATETIME' => [
+			'Date\Date' => 'NR_DATE',
+			'Date\Day' => 'NR_WEEKDAY',
+			'Date\Month' => 'NR_MONTH',
+			'Date\Time' => 'NR_TIME'
+		],
+		'Joomla' => [
+			'com_content#Component\ContentArticle' => 'NR_CONTENT_ARTICLE',
+			'com_content#Component\ContentCategory' => 'NR_CONTENT_CATEGORY',
+			'com_content#Component\ContentView' => 'NR_CONTENT_VIEW',
+			'Joomla\UserID' => 'NR_ASSIGN_USER_ID',
+			'Joomla\UserGroup' => 'NR_USERGROUP',
+			'Joomla\AccessLevel' => 'NR_USERACCESSLEVEL',
+			'Joomla\Menu' => 'NR_MENU',
+			'Joomla\Component' => 'NR_ASSIGN_COMPONENTS',
+			'Joomla\Language' => 'NR_ASSIGN_LANGS'
+		],
+		'NR_TECHNOLOGY' => [
+			'Device' => 'NR_ASSIGN_DEVICES',
+			'Browser' => 'NR_ASSIGN_BROWSERS',
+			'OS' => 'NR_ASSIGN_OS'
+		],
+		'NR_GEOLOCATION' => [
+			'Geo\City' => 'NR_CITY',
+			'Geo\Country' => 'NR_ASSIGN_COUNTRIES',
+			'Geo\Region' => 'NR_REGION',
+			'Geo\Continent' => 'NR_CONTINENT'
+		],
+		'NR_INTEGRATIONS' => [
+			'com_rstbox#EngageBox'=> 'NR_VIEWED_ANOTHER_BOX',
+			'com_convertforms#ConvertForms'=> 'NR_CONVERT_FORMS_CAMPAIGN',
+			'com_acymailing#AcyMailing|com_acym#AcyMailing' => 'NR_ACYMAILING_LIST',
+			'com_akeebasubs#AkeebaSubs' => 'NR_AKEEBASUBS_LEVEL',
+		],
+		'VirtueMart' => [
+			'com_virtuemart#Component\VirtueMartCartContainsProducts' => 'NR_VM_CART_CONTAINS_PRODUCTS',
+			'com_virtuemart#Component\VirtueMartCartContainsXProducts' => 'NR_VM_CART_CONTAINS_X_PRODUCTS',
+			'com_virtuemart#Component\VirtueMartCartValue' => 'NR_VM_CART_VALUE',
+			'com_virtuemart#Component\VirtueMartSingle' => 'NR_VM_PRODUCT',
+			'com_virtuemart#Component\VirtueMartCategory' => 'NR_VM_CATEGORY'
+		],
+		'Hikashop' => [
+			'com_hikashop#Component\HikashopCartContainsProducts' => 'NR_HIKA_CART_CONTAINS_PRODUCTS',
+			'com_hikashop#Component\HikashopCartContainsXProducts' => 'NR_HIKA_CART_CONTAINS_X_PRODUCTS',
+			'com_hikashop#Component\HikashopCartValue' => 'NR_HIKA_CART_VALUE',
+			'com_hikashop#Component\HikashopSingle' => 'NR_HIKA_PRODUCT',
+			'com_hikashop#Component\HikashopCategory' => 'NR_HIKA_CATEGORY'
+		],
+		'K2' => [
+			'com_k2#Component\K2Item' => 'NR_K2_ITEM',
+			'com_k2#Component\K2Category' => 'NR_K2_CATEGORY',
+			'com_k2#Component\K2Tag' => 'NR_K2_TAG',
+			'com_k2#Component\K2Pagetype' => 'NR_K2_PAGE_TYPE',
+		],
+		'NR_ADVANCED' => [
+			'URL' => 'NR_URL',
+			'Referrer' => 'NR_ASSIGN_REFERRER',
+			'IP' => 'NR_IPADDRESS',
+			'Pageviews' => 'NR_ASSIGN_PAGEVIEWS_VIEWS',
+			'Cookie' => 'NR_COOKIE',
+			'PHP' => 'NR_ASSIGN_PHP',
+			'TimeOnSite' => 'NR_ASSIGN_TIMEONSITE'
+		]
+	];
+
+	/**
+	 * Method to get the field option groups.
+	 *
+	 * @return  array  The field option objects as a nested array in groups.
+	 */
+	protected function getGroups()
+	{
+		$include_rules = empty($this->element['include_rules']) ? [] : explode(',', $this->element['include_rules']);
+		$exclude_rules = empty($this->element['exclude_rules']) ? [] : explode(',', $this->element['exclude_rules']);
+
+		$groups[''][] = JHtml::_('select.option', null, JText::_('NR_CB_SELECT_CONDITION'));
+
+		foreach (self::$conditions as $conditionGroup => $conditions)
+		{
+			foreach ($conditions as $conditionName => $condition)
+			{
+				$skip_condition = false;
+
+				/**
+				 * Checks conditions that have multiple components as dependency.
+				 * Check for multiple given components for a particular condition, i.e. acymailing can be loaded via com_acymailing or com_acym
+				 */
+				$multiple_components = explode('|', $conditionName);
+				if (count($multiple_components) >= 2)
+				{
+					foreach ($multiple_components as $component)
+					{
+						$skip_condition = false;
+
+						if (!$conditionName = $this->getConditionName($component))
+						{
+							$skip_condition = true;
+							continue;
+						}
+					}
+				}
+				
+				// If the condition must be skipped, skip it
+				if ($skip_condition)
+				{
+					continue;
+				}
+
+				// Checks for a single condition whether its component exists and can be used.
+				if (!$conditionName = $this->getConditionName($conditionName))
+				{
+					continue;
+				}
+
+				// If its excluded, skip it
+				if (!empty($exclude_rules) && in_array($conditionName, $exclude_rules))
+				{
+					continue;
+				}
+
+				// If its not included, skip it
+				if (!empty($include_rules) && !in_array($conditionName, $include_rules))
+				{
+					continue;
+				}
+
+				// Add condition to the group
+				$groups[JText::_($conditionGroup)][] = JHtml::_('select.option', $conditionName, JText::_($condition), 'value', 'text');
+			}
+		}
+
+		// Merge any additional groups in the XML definition.
+		return array_merge(parent::getGroups(), $groups);
+	}
+
+	/**
+	 * Returns the parsed condition name.
+	 * 
+	 * i.e. $condition: com_k2#Component\K2Item
+	 * will return: Component\K2Item
+	 * 
+	 * @param   string  $condition
+	 * 
+	 * @return  mixed
+	 */
+	private function getConditionName($condition)
+	{
+		$conditionNameParts = explode('#', $condition);
+
+		if (count($conditionNameParts) >= 2 && !Extension::isEnabled($conditionNameParts[0]))
+		{
+			return false;
+		}
+		
+		return isset($conditionNameParts[1]) ? $conditionNameParts[1] : $conditionNameParts[0];
+	}
+}

plugins/system/nrframework/fields/nrdevice.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+require_once JPATH_PLUGINS . '/system/nrframework/helpers/fieldlist.php';
+
+class JFormFieldNRDevice extends NRFormFieldList
+{
+	/**
+	 *  Browsers List
+	 *
+	 *  @var  array
+	 */
+	public $options = array(
+        'desktop' => 'NR_DESKTOPS',
+        'mobile'  => 'NR_MOBILES',
+        'tablet'  => 'NR_TABLETS'
+	);
+
+	protected function getOptions()
+	{
+		asort($this->options);
+
+		foreach ($this->options as $key => $option)
+		{
+			$options[] = JHTML::_('select.option', $key, JText::_($option));
+		}
+
+		return array_merge(parent::getOptions(), $options);
+	}
+}

plugins/system/nrframework/fields/nrdjcatalog2categories.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRDJCatalog2Categories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Indicates whether the options array should be sorted before render.
+	 *
+	 * @var boolean
+	 */
+	protected $sortTree = true;
+
+	/**
+	 * Indicates whether the options array should have the levels re-calculated
+	 * 
+	 * @var boolean
+	 */
+	protected $fixLevels = true;
+
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('id as value, name as text, parent_id as parent, IF (published=1, 0, 1) as disable')
+			->from('#__djc2_categories');
+
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nrdjcfcategories.php

@@ -0,0 +1,47 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRDJCFCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Indicates whether the options array should be sorted before render.
+	 *
+	 * @var boolean
+	 */
+    protected $sortTree = true;
+    
+	/**
+	 * Indicates whether the options array should have the levels re-calculated
+	 * 
+	 * @var boolean
+	 */
+	protected $fixLevels = true;
+    
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('id as value, name as text, parent_id as `parent`, IF (published=1, 0, 1) as disable')
+            ->from('#__djcf_categories');
+
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nrdjeventscategories.php

@@ -0,0 +1,35 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRDJEventsCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Get a list of all DJ Events Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('a.id as value, a.name as text, 0 AS level, 0 as parent, 0 as disable')
+			->from('#__djev_cats as a')
+			->group('a.id, a.name')
+			->order('a.id ASC');
+			
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nreasyblogcategories.php

@@ -0,0 +1,36 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNREasyBlogCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('a.id as value, a.title as text, COUNT(DISTINCT b.id) AS level, a.parent_id as parent, IF (a.published=1, 0, 1) as disable')
+			->from('#__easyblog_category as a')
+			->join('LEFT', '#__easyblog_category AS b on a.lft > b.lft AND a.rgt < b.rgt')
+			->group('a.id, a.title, a.lft')
+			->order('a.lft ASC');
+			
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nreshopcategories.php

@@ -0,0 +1,48 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNREShopCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Indicates whether the options array should be sorted before render.
+	 *
+	 * @var boolean
+	 */
+	protected $sortTree = true;
+
+	/**
+	 * Indicates whether the options array should have the levels re-calculated
+	 * 
+	 * @var boolean
+	 */
+	protected $fixLevels = true;
+    
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('a.id as value, b.category_name as text, a.category_parent_id as parent, IF (a.published=1, 0, 1) as disable')
+			->from('#__eshop_categories as a')
+			->join('LEFT', '#__eshop_categorydetails AS b on a.id=b.category_id');
+
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nreventbookingcategories.php

@@ -0,0 +1,40 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNREventBookingCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Indicates whether the options array should be sorted before render.
+	 *
+	 * @var boolean
+	 */
+	protected $sortTree = true;
+
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+		$db = $this->db;
+
+		$query = $db->getQuery(true)
+			->select('id as value, name as text, level, parent, IF (published=1, 0, 1) as disable')
+			->from('#__eb_categories');
+			
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nrfonts.php

@@ -0,0 +1,43 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+JFormHelper::loadFieldClass('groupedlist');
+
+class JFormFieldNRFonts extends JFormFieldGroupedList
+{
+	/**
+	 * Method to get the field option groups.
+	 *
+	 * @return  array  The field option objects as a nested array in groups.
+	 *
+	 * @since   1.6
+	 */
+	protected function getGroups()
+	{
+		$groups = array();
+
+		foreach (NRFramework\Fonts::getFontGroups() as $name => $fontGroup)
+		{
+			// Initialize the group if necessary.
+			if (!isset($groups[$name]))
+			{
+				$groups[$name] = array();
+			}
+
+			foreach ($fontGroup as $font)
+			{
+				$groups[$name][] = JHtml::_('select.option', $font, $font);
+			}
+		}
+
+		// Merge any additional groups in the XML definition.
+		return array_merge(parent::getGroups(), $groups);
+	}
+}

plugins/system/nrframework/fields/nrgridboxcategories.php

@@ -0,0 +1,47 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRGridboxCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Indicates whether the options array should be sorted before render.
+	 *
+	 * @var boolean
+	 */
+    protected $sortTree = true;
+    
+	/**
+	 * Indicates whether the options array should have the levels re-calculated
+	 * 
+	 * @var boolean
+	 */
+	protected $fixLevels = true;
+
+	/**
+	 * Get a list of all Gridbox Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+		->select('id as value, title as text, parent as parent, IF (published=1, 0, 1) as disable')
+		->from('#__gridbox_categories');
+			
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nrgrouplevel.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRGroupLevel extends JFormFieldNRTreeSelect
+{
+	/**
+	 * A helper to get the list of user groups.
+	 * Logic from administrator\components\com_config\model\field\filters.php@getUserGroups
+	 * 
+	 * @return	object
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+		$db = $this->db;
+
+		// Get the user groups from the database.
+		$query = $db->getQuery(true)
+			->select('a.id AS value, a.title AS text, COUNT(DISTINCT b.id) AS level')
+			->from('#__usergroups AS a')
+			->join('LEFT', '#__usergroups AS b on a.lft > b.lft AND a.rgt < b.rgt')
+			->group('a.id, a.title, a.lft')
+			->order('a.lft ASC');
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nrhikashopcategories.php

@@ -0,0 +1,38 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRHikaShopCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('a.category_id as value, a.category_name as text, (a.category_depth - 1) AS level, a.category_parent_id as parent, IF (a.category_published=1, 0, 1) as disable')
+			->from('#__hikashop_category as a')
+			->join('LEFT', '#__hikashop_category AS b on a.category_left > b.category_left AND a.category_right < b.category_right')
+			->group('a.category_id, a.category_name, a.category_left')
+			->where($db->quoteName('a.category_type') . ' = ' . $db->quote('product'))
+			->where($db->quoteName('a.category_id') . ' > 2')
+			->order('a.category_left ASC');
+			
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nrimagesselector.php

@@ -0,0 +1,113 @@
+<?php
+
+/**
+ * @package         Convert Forms
+ * @version         3.2.12 Free
+ * 
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+defined('_JEXEC') or die('Restricted access');
+
+JFormHelper::loadFieldClass('text');
+
+class JFormFieldNRImagesSelector extends JFormFieldText
+{
+    /**
+	 * Renders the Images Selector
+	 *
+	 * @return  string  The field input markup.
+	 */
+	protected function getInput()
+	{
+		$field_attributes = (array) $this->element->attributes();
+		$attributes = isset($field_attributes["@attributes"]) ? $field_attributes["@attributes"] : null;
+		$field_attributes = new JRegistry($attributes);
+
+		if (!$images = $field_attributes->get('images', ''))
+		{
+			return;
+		}
+		
+		$columns = $field_attributes->get('columns', 6);
+		$width = $field_attributes->get('width', '100%');
+		$height = $field_attributes->get('height', '');
+		$key_type = $field_attributes->get('key_type', null);
+
+		$class = 'cols_' . $columns . (!empty($this->class) ? ' ' . $this->class : '');
+
+		$paths = explode(',', $images);
+
+		$images = [];
+		foreach ($paths as $key => $path)
+		{
+			// skip empty paths
+			if (empty(rtrim(ltrim($path, ' '), ' ')))
+			{
+				continue;
+			}
+
+			if ($imgs = $this->getImagesFromPath($path))
+			{
+				// add new images to array of images
+				$images = array_merge($images, $imgs);
+			}
+			else
+			{
+				// check if image exist
+				if (file_exists(JPATH_ROOT . '/' . ltrim($path, ' /')))
+				{
+					// add new image to array of images
+					$images[] = ltrim($path, ' /');
+				}
+			}
+		}
+
+		// load CSS
+		JHtml::script('plg_system_nrframework/images-selector-field.js', ['relative' => true, 'version' => true]);
+		JHtml::stylesheet('plg_system_nrframework/images-selector-field.css', ['relative' => true, 'version' => true]);
+		
+		$layout = new \JLayoutFile('imagesselector', JPATH_PLUGINS . '/system/nrframework/layouts');
+
+		$data = [
+			'value'    => !empty($this->value) ? $this->value : $this->default,
+			'name' 	   => $this->name,
+			'class'    => $class,
+			'key_type' => $key_type,
+			'images'   => $images,
+			'columns'  => $columns,
+			'id'  	   => $this->id,
+			'required' => $this->required,
+			'width'    => $width,
+			'height'   => $height
+		];
+		
+        return $layout->render($data);
+	}
+
+    /**
+     * Returns all images in path
+     * 
+     * @return  mixed
+     */
+	private function getImagesFromPath($path)
+	{
+		$folder = JPATH_ROOT . '/' . ltrim($path, ' /');
+
+		if (!is_dir($folder) || !$folder_files = scandir($folder))
+		{
+			return false;
+		}
+		
+		$images = array_diff($folder_files, array('.', '..', '.DS_Store'));
+		$images = array_values($images);
+
+		// prepend path to image file names
+		array_walk($images, function(&$value, $key) use ($path) { $value = ltrim($path, ' /') . '/' . $value; } );
+		
+		return $images;
+	}
+}

plugins/system/nrframework/fields/nrinlinefileupload.php

@@ -0,0 +1,151 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+use Joomla\Registry\Registry;
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+class JFormFieldNRInlineFileUpload extends NRFormField
+{
+	/**
+	 * Method to get the field input markup.
+	 *
+	 * @return  string  The field input markup.
+	 */
+	protected function getInput()
+	{
+		$layout = new \JLayoutFile('inlinefileupload', JPATH_PLUGINS . '/system/nrframework/layouts');
+
+		$data = [
+			'value' => $this->value,
+			'name' => $this->name,
+			'accept' => $this->get('accept'),
+			'upload_folder' => base64_encode($this->get('upload_folder'))
+		];
+
+		return $layout->render($data);
+	}
+
+    /**
+     * Handles the AJAX request
+     *
+     * @param   array    $options
+     *
+     * @return  array
+     */
+    public function onAjax($options)
+    {
+		$options = new Registry($options);
+
+		if ($options->get('action') == 'remove')
+		{
+			$this->onRemove($options);
+			return;
+		}
+
+		$this->onUpload();
+	}
+
+	/**
+	 * On file upload.
+	 * 
+	 * @return  string
+	 */
+	private function onUpload()
+	{
+		// Make sure we have a valid file passed
+        if (!$file = $this->app->input->files->get('file', null, null))
+        {
+            echo json_encode([
+				'error' => true,
+				'response' => \JText::_('NR_UPLOAD_ERROR_INVALID_FILE')
+			]);
+			jexit();
+		}
+
+		// ensure an upload folder was given
+		if (!$upload_folder = $this->app->input->get('upload_folder', null, null))
+		{
+            echo json_encode([
+				'error' => true,
+				'response' => \JText::_('NR_UPLOAD_FOLDER_MISSING')
+			]);
+			jexit();
+		}
+
+		// ensure we can decode its value
+		if (!$upload_folder = base64_decode($upload_folder))
+		{
+            echo json_encode([
+				'error' => true,
+				'response' => \JText::_('NR_UPLOAD_FOLDER_INVALID')
+			]);
+			jexit();
+		}
+
+		$uploaded_file = null;
+		$file_size = 0;
+		$file_name = null;
+
+		// try to upload the file.
+		try {
+			$uploaded_file = \NRFramework\File::upload($file, JPATH_ROOT . DIRECTORY_SEPARATOR . $upload_folder, 'text/plain', false, true);
+			$filePathInfo = NRFramework\File::pathinfo($uploaded_file);
+			$file_name = $filePathInfo['basename'];
+            $file_size = JFile::exists($uploaded_file) ? filesize($uploaded_file) : 0;
+			$file_size = $file_size ? number_format($file_size / 1024, 2) . ' KB' : $file_size;
+		} catch (\Throwable $th)
+		{
+            echo json_encode([
+				'error' => true,
+				'response' => $th->getMessage()
+			]);
+			jexit();
+		}
+		
+		echo json_encode([
+			'error' => false,
+			'response' => \JText::_('NR_FILE_UPLOADED_SUCCESSFULLY'),
+			'file_name' => base64_encode($file_name),
+			'file' => base64_encode($uploaded_file),
+			'file_size' => $file_size
+		]);
+		jexit();
+	}
+
+	/**
+	 * On file removal.
+	 * 
+	 * @return  string
+	 */
+	private function onRemove($options)
+	{
+		if (!$file = $options->get('remove_file'))
+		{
+            echo json_encode([
+				'error' => true,
+				'response' => \JText::_('NR_UPLOAD_ERROR_INVALID_FILE')
+			]);
+			jexit();
+		}
+
+		// If file exists, remove it
+		if (file_exists($file))
+		{
+			unlink($file);
+		}
+
+		echo json_encode([
+			'error' => false,
+			'response' => \JText::_('NR_FILE_DELETED')
+		]);
+		jexit();
+	}
+}

plugins/system/nrframework/fields/nrjbusinessdirectorycategories.php

@@ -0,0 +1,39 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRJBusinessDirectoryCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Get a list of all J-BusinessDirectory Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+        $filter_type = isset($this->element['filter_type']) ? (string) $this->element['filter_type'] : 1;
+		
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('a.id as value, a.name as text, a.level AS level, a.parent_id as parent, IF (a.published=1, 0, 1) as disable')
+			->from('#__jbusinessdirectory_categories as a')
+            ->join('LEFT', '#__jbusinessdirectory_categories AS b on a.lft > b.lft AND a.rgt < b.rgt')
+            ->where($db->quoteName('a.type') . ' = ' . $db->q($filter_type))
+			->group('a.id, a.name, a.lft')
+			->order('a.lft ASC');
+			
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nrjcalprocategories.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRJCalProCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('a.id as value, a.title as text, COUNT(DISTINCT b.id) AS level, a.parent_id as parent, IF (a.published=1, 0, 1) as disable')
+			->from('#__categories as a')
+            ->join('LEFT', '#__categories AS b on a.lft > b.lft AND a.rgt < b.rgt')
+            ->where('a.extension = "com_jcalpro"')
+			->group('a.id, a.title, a.lft')
+			->order('a.lft ASC');
+			
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nrjeventscategories.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRJEventsCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('a.id as value, a.title as text, COUNT(DISTINCT b.id) AS level, a.parent_id as parent, IF (a.published=1, 0, 1) as disable')
+			->from('#__categories as a')
+            ->join('LEFT', '#__categories AS b on a.lft > b.lft AND a.rgt < b.rgt')
+            ->where('a.extension = "com_jevents"')
+			->group('a.id, a.title, a.lft')
+			->order('a.lft ASC');
+			
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nrjshoppingcategories.php

@@ -0,0 +1,66 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRJShoppingCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Indicates whether the options array should be sorted before render.
+	 *
+	 * @var boolean
+	 */
+	protected $sortTree = true;
+
+	/**
+	 * Indicates whether the options array should have the levels re-calculated
+	 * 
+	 * @var boolean
+	 */
+	protected $fixLevels = true;
+    
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+		$db = $this->db;
+
+		$query = $db->getQuery(true)
+			->select($db->quoteName('name_' . $this->getLanguage(), 'text'))
+			->select('category_id as value, category_parent_id as parent, IF (category_publish=1, 0, 1) as disable')
+			->from('#__jshopping_categories');
+
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+
+	/**
+     *  JoomShopping is using different columns per language. Therefore, we need to use their API to get the default language code.
+     *
+     *  @return  string
+     */
+    private function getLanguage($default = 'en-GB')
+    {	
+		// Silent inclusion.
+        @include_once JPATH_SITE . '/components/com_jshopping/lib/factory.php';
+
+        if (!class_exists('JSFactory'))
+        {
+            return $default;
+        }
+
+		return JSFactory::getConfig()->defaultLanguage;
+    }
+}

plugins/system/nrframework/fields/nrk2.php

@@ -0,0 +1,152 @@
+<?php
+/**
+ * @author          Tassos.gr <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+require_once JPATH_PLUGINS . '/system/nrframework/helpers/groupfield.php';
+
+class JFormFieldNRK2 extends NRFormGroupField
+{
+    public $type = 'K2';
+
+    /**
+     *  Pagetypes options
+     *
+     *  @var  array
+     */
+    public $pagetype_options = array(
+        'itemlist_category' => 'NR_ASSIGN_K2_CATEGORY_OPTION',
+        'item_item'         => 'NR_ASSIGN_K2_ITEM_OPTION',
+        'item_itemform'     => 'NR_ASSIGN_K2_ITEM_FORM_OPTION',
+        'latest_latest'     => 'NR_ASSIGN_K2_LATEST_OPTION',
+        'itemlist_tag'      => 'NR_ASSIGN_K2_TAG_OPTION',
+        'itemlist_user'     => 'NR_ASSIGN_K2_USER_PAGE_OPTION'
+    );
+
+    
+    public function getItems()
+    {
+        $query = $this->db->getQuery(true);
+        $query
+            ->select('i.id, i.title as name, i.language, c.name as cat, i.published')
+            ->from('#__k2_items as i')
+            ->join('LEFT', '#__k2_categories AS c ON c.id = i.catid')
+            ->order('i.title, i.ordering, i.id');
+        $this->db->setQuery($query);
+		$list = $this->db->loadObjectList();
+
+		return $this->getOptionsByList($list, array('language', 'cat', 'id'));
+    }
+
+    public function getPagetypes()
+    {
+        asort($this->pagetype_options);
+
+		foreach ($this->pagetype_options as $key => $option)
+		{
+			$options[] = JHTML::_('select.option', $key, JText::_($option));
+		}
+
+		return $options;
+    }
+
+    public function getTags()
+    {
+        $query = $this->db->getQuery(true);
+        $query
+            ->select('t.id, t.name')
+            ->from('#__k2_tags as t')
+            ->order('t.id');
+        $this->db->setQuery($query);
+        $list = $this->db->loadObjectList();
+
+        return $this->getOptionsByList($list);        
+    }
+
+    public function getCategories()
+    {
+        $query = $this->db->getQuery(true);
+        $query
+            ->select('c.id, c.name, c.parent, c.published, c.language')
+            ->from('#__k2_categories as c')
+            ->where('c.trash = 0')
+            ->where('c.id != c.parent')
+            ->order('c.ordering');
+        $this->db->setQuery($query);
+        $cats = $this->db->loadObjectList();
+
+        $options = [];
+        // get category levels
+        foreach ($cats as $c)
+        {
+            $level = 0;
+            $parent_id = (int)$c->parent;
+
+            while ($parent_id)
+            {
+                $level++;
+                $parent_id = $this->getNextParentId($cats, $parent_id);
+            }
+
+            $c->level = $level;
+            $options[] = $c;
+        }
+
+        // sort options
+        $options = $this->sortTreeSelectOptions($options);        
+        return $this->getOptionsByList($options, array('language'));
+    }
+
+    /**
+     *  Sorts treeselect options
+     * 
+     *  @param  array $options
+     *  @param  int   $parent_id
+     * 
+     *  @return array
+     */
+    protected function sortTreeSelectOptions($options, $parent_id = 0)
+    {
+        if (empty($options))
+        {
+            return [];
+        }
+
+        $result = [];
+
+        $sub_options = array_filter($options, function($option) use($parent_id)
+        {
+            return $option->parent == $parent_id;
+        });
+
+        foreach ($sub_options as $option)
+        {
+            $result[] = $option;
+            $result = array_merge($result, $this->sortTreeSelectOptions($options, $option->id));
+        }
+
+        return $result;
+    }
+
+    /**
+     *  Returns the next parent id
+     *  Helper method for getCategories
+     * 
+     *  @return int
+     */
+    protected function getNextParentId($categories, $current_pid)
+    {
+        foreach($categories as $c)
+        {
+            if ((int)$c->id === $current_pid)
+            {
+                return (int)$c->parent;
+            }
+        }
+    }
+}

plugins/system/nrframework/fields/nrmenuitems.php

@@ -0,0 +1,125 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+use \NRFramework\HTML;
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+
+class JFormFieldNRMenuItems extends NRFormField
+{
+	/**
+	 * Output the HTML for the field
+	 * Example of usage: <field name="field_name" type="nrmenuitems" label="NR_SELECTION" />
+	 */
+	protected function getInput()
+	{
+		$size    = $this->get('size', 300);
+		$options = $this->getMenuItems();
+
+		return HTML::treeselect($options, $this->name, $this->value, $this->id, $size);
+	}
+
+	/**
+	 * Get a list of menu links for one or all menus.
+	 * Logic from administrator\components\com_menus\helpers\menus.php@getMenuLinks()
+	 */
+	public function getMenuItems()
+	{
+		NRFramework\Functions::loadLanguage('com_menus', JPATH_ADMINISTRATOR);
+		$db = $this->db;
+
+		// Prevent the "The SELECT would examine more than MAX_JOIN_SIZE rows; " MySQL error
+		// on websites with a big number of menu items in the db.
+		$db->setQuery('SET SQL_BIG_SELECTS = 1')->execute();
+
+		$query = $db->getQuery(true)
+			->select('a.id AS value, a.title AS text, a.alias, a.level, a.menutype, a.type, a.template_style_id, a.checked_out, a.language')
+			->from('#__menu AS a')
+			->join('LEFT', $db->quoteName('#__menu') . ' AS b ON a.lft > b.lft AND a.rgt < b.rgt')
+			->where('a.published != -2')
+			->group('a.id, a.alias, a.title, a.level, a.menutype, a.type, a.template_style_id, a.checked_out, a.lft, a.language')
+			->order('a.lft ASC');
+
+		// Get the options.
+		$db->setQuery($query);
+
+		try
+		{
+			$links = $db->loadObjectList();
+		}
+		catch (RuntimeException $e)
+		{
+			JFactory::getApplication()->enqueueMessage($e->getMessage());
+			return false;
+		}
+
+		// Group the items by menutype.
+		$query->clear()
+			->select('*')
+			->from('#__menu_types')
+			->where('menutype <> ' . $db->quote(''))
+			->order('title, menutype');
+		$db->setQuery($query);
+
+		try
+		{
+			$menuTypes = $db->loadObjectList();
+		}
+		catch (RuntimeException $e)
+		{
+			JFactory::getApplication()->enqueueMessage($e->getMessage());
+			return false;
+		}
+
+		// Create a reverse lookup and aggregate the links.
+		$rlu = array();
+		foreach ($menuTypes as &$type)
+		{
+			$type->value      = 'type.' . $type->menutype;
+			$type->text       = $type->title;
+			$type->level      = 0;
+			$type->class      = 'hidechildren';
+			$type->labelclass = 'nav-header';
+
+			$rlu[$type->menutype] = &$type;
+			$type->links          = array();
+		}
+
+		foreach ($links as &$link)
+		{
+			if (isset($rlu[$link->menutype]))
+			{
+				if (preg_replace('#[^a-z0-9]#', '', strtolower($link->text)) !== preg_replace('#[^a-z0-9]#', '', $link->alias))
+				{
+					$link->text .= ' <small>[' . $link->alias . ']</small>';
+				}
+
+				if ($link->language && $link->language != '*')
+				{
+					$link->text .= ' <small>(' . $link->language . ')</small>';
+				}
+
+				if ($link->type == 'alias')
+				{
+					$link->text .= ' <small>(' . JText::_('COM_MENUS_TYPE_ALIAS') . ')</small>';
+					$link->disable = 1;
+				}
+
+				$rlu[$link->menutype]->links[] = &$link;
+
+				unset($link->menutype);
+			}
+		}
+
+		return $menuTypes;
+	}
+
+}

plugins/system/nrframework/fields/nrmodulepositions.php

@@ -0,0 +1,67 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2019 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+require_once JPATH_PLUGINS . '/system/nrframework/helpers/fieldlist.php';
+
+class JFormFieldNRModulePositions extends NRFormFieldList
+{
+    /**
+     * Method to get a list of options for a list input.
+     *
+     * @return   array   An array of JHtml options.
+     */
+    protected function getOptions()
+    {
+        // get templates
+        $templates = $this->getTemplates();
+
+        require_once JPATH_ADMINISTRATOR . '/components/com_templates/helpers/templates.php';
+
+        // get all position options
+        $options = [];
+
+        $options[] = JHTML::_('select.option', '',  \JText::_('NR_NONE_SELECTED'));
+        foreach ($templates as $template) {
+            $options[] = JHTML::_('select.option', '<OPTGROUP>', $template->name);
+
+            // find all positions for template
+            $positions = TemplatesHelper::getPositions(0, $template->element);
+            foreach ($positions as $position) {
+                $options[] = JHTML::_('select.option', $position, $position);
+            }
+
+            $options[] = JHTML::_('select.option', '</OPTGROUP>');
+        }
+
+        return array_merge(parent::getOptions(), $options);
+    }
+
+    /**
+     * Returns all enabled templates
+     * 
+     * @return  object
+     */
+    private function getTemplates()
+    {
+        $db = $this->db;
+
+        $query = $db->getQuery(true);
+        $query->select('element, name, enabled');
+        $query->from('#__extensions');
+        $query->where('client_id = 0');
+        $query->where('type = '.$db->quote('template'));
+        $query->where('enabled = 1');
+        $db->setQuery($query);
+
+        return $db->loadObjectList();
+    }
+}

plugins/system/nrframework/fields/nrmodules.php

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2019 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+require_once JPATH_PLUGINS . '/system/nrframework/helpers/fieldlist.php';
+
+class JFormFieldNRModules extends NRFormFieldList
+{
+    /**
+     * Provide a list of all published modules.
+     *
+     * @return   array   An array of JHtml options.
+     */
+    protected function getOptions()
+    {
+        // Get modules
+        $modules = $this->getModules();
+
+        // get all position options
+        $options = [];
+
+        $options[] = JHTML::_('select.option', '',  \JText::_('NR_NONE_SELECTED'));
+        foreach ($modules as $module) {
+            $options[] = JHTML::_('select.option', $module->id, $module->title . ' (' . $module->id . ')');
+        }
+
+        return array_merge(parent::getOptions(), $options);
+    }
+
+    /**
+     * Returns all enabled modules.
+     * 
+     * @return  object
+     */
+    private function getModules()
+    {
+        $db = $this->db;
+
+        $query = $db->getQuery(true);
+        $query->select('id, title');
+        $query->from('#__modules');
+        $query->where('published = 1');
+        $db->setQuery($query);
+
+        return $db->loadObjectList();
+    }
+}

plugins/system/nrframework/fields/nrnumber.php

@@ -0,0 +1,41 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+JFormHelper::loadFieldClass('number');
+
+class JFormFieldNRNumber extends JFormFieldNumber
+{
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string  
+     */
+    function getInput()
+    {   
+        $parent = parent::getInput();
+        $addon  = (string) $this->element['addon'];
+
+        if (empty($addon))
+        {
+            return $parent;
+        }
+
+        return '
+            <div class="input-append input-group">
+                ' . $parent . '
+                <span class="add-on input-group-append">
+                    <span class="input-group-text" style="font-size:inherit;">' . JText::_($addon) . '</span>
+                </span>
+            </div>
+        ';
+    }
+}

plugins/system/nrframework/fields/nros.php

@@ -0,0 +1,41 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+require_once JPATH_PLUGINS . '/system/nrframework/helpers/fieldlist.php';
+
+class JFormFieldNROs extends NRFormFieldList
+{
+	/**
+	 *  Browsers List
+	 *
+	 *  @var  array
+	 */
+	public $options = array(
+        'linux'      => 'NR_LINUX',
+        'mac'        => 'NR_MAC',
+        'android'    => 'NR_ANDROID',
+        'ios'        => 'NR_IOS',
+        'windows'    => 'NR_WINDOWS',
+        'blackberry' => 'NR_BLACKBERRY',
+        'chromeos'   => 'NR_CHROMEOS'
+	);
+	
+	protected function getOptions()
+	{
+		asort($this->options);
+
+		foreach ($this->options as $key => $option)
+		{
+			$options[] = JHTML::_('select.option', $key, JText::_($option));
+		}
+
+		return array_merge(parent::getOptions(), $options);
+	}
+}

plugins/system/nrframework/fields/nrresponsivecontrol.php

@@ -0,0 +1,225 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2018 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+JFormHelper::loadFieldClass('text');
+
+use Joomla\Registry\Registry;
+
+class JFormFieldNRResponsiveControl extends JFormFieldText
+{
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string  
+     */
+    function getInput()
+    {
+        return $this->getLayout();
+    }
+
+    /**
+     * Returns html for all devices
+     * 
+     * @return  array
+     */
+    private function getFieldsData()
+    {
+        if (!$fieldsList = $this->getSubformFieldsList())
+        {
+            return [];
+        }
+        
+        $html = [
+            'desktop' => '',
+            'tablet'  => '',
+            'mobile'  => ''
+        ];
+
+        $base_name = $fieldsList['base_name'];
+
+        // Control default value
+        $control_default = json_decode($this->default, true);
+
+        // loop for all devices
+        foreach ($html as $device => &$device_output)
+        {
+            // loop all fields
+            foreach ($fieldsList['fields'] as $fieldName)
+            {
+                $name = $fieldName;
+
+                // Default value of the input for breakpoint
+                $default = null;
+
+                if ($control_default && isset($control_default[$device][$name]))
+                {
+                    $default = $control_default[$device][$name];
+                }
+                
+                $field_data = $this->getFieldInputByDevice($name, $device, $default);
+                $field_html = $field_data['html'];
+
+                $field_html = str_replace(
+                    [
+                        '[' . $this->group . '][' . $name . ']',
+                        '_' . $this->group . '_' . $name
+                    ],
+                    [
+                        '[' . $this->group . '][' . $base_name . '][' . $name . '][' . $device . ']',
+                        '_' . $this->group . '_' . $base_name . '_' . $name . '_' . $device
+                    ], $field_html
+                );
+                
+                // Render layout
+                $payload = [
+                    'label' => $field_data['label'],
+                    'description' => $field_data['description'],
+                    'data' => $field_html
+                ];
+                $layout = new JLayoutFile('responsive_control_item', JPATH_PLUGINS . '/system/nrframework/layouts');
+                $device_output .= $layout->render($payload);
+            }
+        }
+        
+        return $html;
+    }
+
+    /**
+     * Returns the field layout
+     * 
+     * @return  string
+     */
+    private function getLayout()
+    {
+        JHtml::stylesheet('plg_system_nrframework/responsive_control.css', ['relative' => true, 'version' => 'auto']);
+        JHtml::script('plg_system_nrframework/responsive_control.js', ['relative' => true, 'version' => 'auto']);
+
+        $width = isset($this->element['width']) ? (string) $this->element['width'] : '300px';
+        $title = isset($this->element['title']) ? (string) $this->element['title'] : '';
+        $class = isset($this->element['class']) ? ' ' . (string) $this->element['class'] : '';
+
+        if (defined('nrJ4'))
+        {
+            $class .= ' isJ4';
+        }
+        
+        $data = [
+            'title'  => JText::_($title),
+            'width'  => $width,
+            'class'  => $class,
+            'fields' => $this->getFieldsData()
+        ];
+
+        // Render layout
+        $layout = new JLayoutFile('responsive_control', JPATH_PLUGINS . '/system/nrframework/layouts');
+        return $layout->render($data);
+    }
+
+    /**
+     * Returns the list of added fields
+     * 
+     * @return  array
+     */
+    private function getSubformFieldsList()
+    {
+        $el = $this->element;
+
+        if (empty(count($el->subform)))
+        {
+            return [];
+        }
+
+        $data = [
+            'base_name' => $el->attributes()->name,
+            'fields' => []
+        ];
+
+        foreach ($el->subform->field as $key => $field)
+        {
+            $data['fields'][] = (string) $field->attributes()->name;
+        }
+        
+        return $data;
+    }
+
+    /**
+     * Returns the field's title and value
+     * 
+     * @param   string  $field_name     The field name of the field.
+     * @param   string  $device         The breakpoint of the field.
+     * @param   string  $default        The default value of the field.
+     * 
+     * @return  array
+     */
+    private function getFieldInputByDevice($field_name, $device, $default = null)
+    {
+        $el = $this->element;
+
+        $data = [];
+
+        foreach ($el->subform->field as $key => $field)
+        {
+            if ((string) $field->attributes()->name != $field_name)
+            {
+                continue;
+            }
+
+            // Get input value
+            $value = $this->getFieldInputValue($field_name, $device);
+
+            // If no value is set, get the default value (if given)
+            if (!$value && $default)
+            {
+                $value = $default;
+            }
+
+            $data = [
+                'label' => JText::_((string) $field->attributes()->label),
+                'description' => JText::_((string) $field->attributes()->description),
+                'html' => $this->form->getInput($field_name, $this->group, $value)
+            ];
+        }
+        
+        return $data;
+    }
+
+    /**
+     * Finds the field input value
+     * 
+     * @param   string  $field_name
+     * @param   string  $device
+     * 
+     * @return  string
+     */
+    private function getFieldInputValue($field_name, $device)
+    {
+        $values = $this->getValue();
+        $values = new Registry($values);
+
+        return $values->get($field_name . '.' . $device);
+    }
+
+    /**
+     * Returns the field value
+     * 
+     * @return  mixed
+     */
+    private function getValue()
+    {
+        if (empty($this->value))
+        {
+            return;
+        }
+
+        return $this->value;
+    }
+}

plugins/system/nrframework/fields/nrrsblogcategories.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRRSBlogCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('a.id as value, a.title as text, (COUNT(DISTINCT b.id) - 1) AS level, a.parent_id as parent, IF (a.published=1, 0, 1) as disable')
+			->from('#__rsblog_categories as a')
+			->where('a.parent_id > 0')
+			->join('LEFT', '#__rsblog_categories AS b on a.lft > b.lft AND a.rgt < b.rgt')
+			->group('a.id, a.title, a.lft')
+			->order('a.lft ASC');
+			
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nrsobiprocategories.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRSobiProCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Indicates whether the options array should be sorted before render.
+	 *
+	 * @var boolean
+	 */
+	protected $sortTree = true;
+
+	/**
+	 * Indicates whether the options array should have the levels re-calculated
+	 * 
+	 * @var boolean
+	 */
+	protected $fixLevels = true;
+	
+    /**
+     * Increase the value(ID) of the category by one.
+	 * This happens because we have a parent category "Bussiness Directory" that pushes-in the indentation
+	 * and we reset it by decreasing the value, level and parent.
+     * 
+     * @var boolean
+     */
+	protected $increaseValue = true;
+
+	/**
+	 * Get a list of all SobiPro Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('(a.id - 1) as value, b.sValue as text, (a.parent - 1) as level, (a.parent - 1) as parent, IF (a.state=1, 0, 1) as disable')
+			->from('#__sobipro_object as a')
+            ->join('LEFT', "#__sobipro_language AS b on a.id = b.id AND b.sKey = 'name'")
+			->where($db->quoteName('a.oType') . ' = '. $db->quote('category'));
+			
+		$db->setQuery($query);
+
+		$result = $db->loadObjectList();
+
+		return $result;
+	}
+}

plugins/system/nrframework/fields/nrsppagebuildercategories.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRSPPageBuilderCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('a.id as value, a.title as text, (COUNT(DISTINCT b.id) - 1) AS level, a.parent_id as parent, IF (a.published=1, 0, 1) as disable')
+			->from('#__categories as a')
+            ->join('LEFT', '#__categories AS b on a.lft > b.lft AND a.rgt < b.rgt')
+            ->where('a.extension = "com_sppagebuilder"')
+			->group('a.id, a.title, a.lft')
+			->order('a.lft ASC');
+			
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/nrtext.php

@@ -0,0 +1,93 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+JFormHelper::loadFieldClass('text');
+
+class JFormFieldNRText extends JFormFieldText
+{
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string  
+     */
+    public function getInput()
+    {   
+        // This line added to help us support the K2 Items and Joomla! Articles dropdown listbox array values
+        $this->value = is_array($this->value) ? implode(',', $this->value) : $this->value;
+
+        // Adds an extra info label next to input
+        $addon  = (string) $this->element['addon'];
+        $parent = parent::getInput();
+
+        if (!empty($addon))
+        {
+            $html[] = '
+                <div class="input-append input-group">
+                    ' . $parent . '
+                    <span class="add-on input-group-append">
+                        <span class="input-group-text" style="font-size:inherit;">' . JText::_($addon) . '</span>
+                    </span>
+                </div>';
+        } else
+        {
+            $html[] = parent::getInput();
+        }
+
+        // Adds a link next to input
+        $url        = $this->element['url'];
+        $text       = $this->element['urltext'];
+        $target     = $this->element['urltarget'] ? $this->element['urltarget'] : "_blank";
+        $class      = $this->element['urlclass'] ? $this->element['urlclass'] : "";
+        $attributes = "";
+
+        // Popup mode
+        if ($this->element["urlpopup"])
+        {
+            $class .= " nrPopup";
+            $attributes = 'data-width="600" data-height="600"';
+            $this->addPopupScript();
+        }
+
+        if ($url && $text)
+        {
+            $html[] = '<a ' . $attributes . ' class="' . $class . '" style="margin-left:10px;" href="' . $url . '" target="' . $target . '">' . JText::_($text) . '</a>';
+        }
+
+        return implode('', $html);
+    }
+
+    private function addPopupScript()
+    {
+        static $run;
+
+        if ($run)
+        {
+            return;
+        }
+
+        $run = true;
+
+        JFactory::getDocument()->addScriptDeclaration('
+            jQuery(function($) {
+                $(".nrPopup").click(function() {
+                    url    = $(this).attr("href");
+                    width  = $(this).data("width");
+                    height = $(this).data("height");
+
+                    window.open(""+url+"", "nrPopup", "width=" + width + ", height=" + height + "");
+
+                    return false;              
+                })
+            })
+        ');
+    }
+}

plugins/system/nrframework/fields/nrtoggle.php

@@ -0,0 +1,66 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+use NRFramework\HTML;
+
+JFormHelper::loadFieldClass('checkbox');
+
+/**
+ * Pure CSS iOS-like Toggle Button based on the Checkbox field.
+ * 
+ * This field also fixes the Unchecked checkbox value using a hidden field.
+ * Credits: http://mistercameron.com/2008/01/unchecked-checkbox-values/
+ */
+class JFormFieldNRToggle extends JFormFieldCheckbox
+{
+	/**
+	 * On state value
+	 *
+	 * @var int
+	 */
+	protected $on_value = 1;
+
+	/**
+	 * Off state value
+	 *
+	 * @var int
+	 */
+	protected $off_value = 0;
+
+	/**
+	 * Method to get the field input markup.
+	 *
+	 * @return  string
+	 */
+	public function getInput()
+	{
+		HTML::stylesheet('plg_system_nrframework/toggle.css');
+
+		$required = $this->required ? ' required aria-required="true"' : '';
+		$checked  = $this->checked ? ' checked' : '';
+		$class	  = !empty($this->class) ? ' ' . $this->class : '';
+
+		// Fix bug inherited from the Checkbox field where the input remains checked even if save it unchecked.
+		if ($this->checked && (string) $this->value == (string) $this->off_value)
+		{
+			$checked = '';
+		}
+
+		return '
+			<span class="nrtoggle' . $class . '">
+				<input type="hidden" name="' . $this->name . '" id="' . $this->id . '_" value="' . $this->off_value . '">
+				<input type="checkbox" name="' . $this->name . '" id="' . $this->id . '" value="'
+				. htmlspecialchars($this->on_value, ENT_COMPAT, 'UTF-8') . '"' . $checked . $required . ' />
+				<label for="' . $this->id . '"></label>
+			</span>
+		';
+	}
+}

plugins/system/nrframework/fields/nrurl.php

@@ -0,0 +1,58 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+class JFormFieldNRURL extends NRFormField
+{
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string  
+     */
+    function getInput()
+    {   
+        $url    = $this->get("url", "#");
+        $target = $this->get("target", "_blank");
+        $text   = $this->get("text");
+        $class  = $this->get("class");
+        $icon   = $this->get("icon", null);
+
+        $url = str_replace("{{base}}", JURI::base(), $url);
+        $url = str_replace("{{root}}", JURI::root(), $url);
+
+        $html[] = '<a class="nrurl ' . $class . '" href="' . $url . '" target="' . $target . '">';
+
+        if ($icon)
+        {
+            $html[] = '<span class="icon-'.$icon.'"></span>';
+        }
+
+        $html[] = $this->prepareText($text);
+        $html[] = '</a>';
+
+        // Add CSS to the page
+        $run = false;
+        if (!$run)
+        {
+            JFactory::getDocument()->addStyleDeclaration('
+                .nrurl.disabled {
+                    pointer-events: none;
+                }
+            ');
+
+            $run = true;
+        }
+
+        return implode(" ", $html);
+    }
+}

plugins/system/nrframework/fields/nrvirtuemartcategories.php

@@ -0,0 +1,71 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRVirtueMartCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Indicates whether the options array should be sorted before render.
+	 *
+	 * @var boolean
+	 */
+    protected $sortTree = true;
+    
+	/**
+	 * Indicates whether the options array should have the levels re-calculated
+	 * 
+	 * @var boolean
+	 */
+	protected $fixLevels = true;
+
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+		$db = $this->db;
+
+		$query = $db->getQuery(true)
+			->select('a.virtuemart_category_id as value, b.category_name as text, c.category_parent_id as parent, IF (a.published=1, 0, 1) as disable')
+			->from('#__virtuemart_categories as a')
+            ->join('LEFT', '#__virtuemart_categories_' . $this->getLanguage() . ' AS b on a.virtuemart_category_id = b.virtuemart_category_id')
+			->join('LEFT', '#__virtuemart_category_categories AS c on a.virtuemart_category_id = c.id')
+			->order('c.id desc');
+		
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+
+	/**
+     *  VirtueMart is using different tables per language. Therefore, we need to use their API to get the default language code
+     *
+     *  @return  string
+     */
+    private function getLanguage($default = 'en_gb')
+    {	
+		// Silent inclusion.
+		@include_once JPATH_ADMINISTRATOR . '/components/com_virtuemart/helpers/config.php'; 
+
+        if (!class_exists('VmConfig'))
+		{
+			return $default;
+        }
+            
+        // Init configuration
+		VmConfig::loadConfig();
+		
+        return VmConfig::$jDefLang;
+    }
+}

plugins/system/nrframework/fields/nrzoocategories.php

@@ -0,0 +1,48 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRZooCategories extends JFormFieldNRTreeSelect
+{
+	/**
+	 * Indicates whether the options array should be sorted before render.
+	 *
+	 * @var boolean
+	 */
+    protected $sortTree = true;
+    
+	/**
+	 * Indicates whether the options array should have the levels re-calculated
+	 * 
+	 * @var boolean
+	 */
+	protected $fixLevels = true;
+
+	/**
+	 * Get a list of all EventBooking Categories
+	 *
+	 * @return void
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+        $db = $this->db;
+        
+		$query = $db->getQuery(true)
+			->select('id as value, name as text, parent as `parent`, IF (published=1, 0, 1) as disable')
+			->from('#__zoo_category')
+			->order('ordering');
+
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}

plugins/system/nrframework/fields/password.php

@@ -0,0 +1,68 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+JFormHelper::loadFieldClass('password');
+
+class JFormFieldNR_Password extends JFormFieldPassword
+{
+	/**
+	 * Method to get the field input markup.
+	 *
+	 * @return  string  The field input markup.
+	 */
+	public function getInput()
+	{
+		if (defined('nrJ4'))
+		{
+			return parent::getInput();
+		}
+
+		$id = $this->id . '_btn';
+
+		$doc = JFactory::getDocument();
+
+		JHtml::stylesheet('plg_system_nrframework/fields.css', false, true);
+
+		$doc->addStyleDeclaration('
+			.nr-pass-btn {
+				display:flex;
+				align-items:center;
+			}
+			.nr-pass-btn > * {
+				margin:0 !important;
+				padding:0 !important;
+			}
+			.nr-pass-btn label {
+				margin-left:5px !important;
+				user-select: none;
+			}
+		');
+
+		$doc->addScriptDeclaration('
+			jQuery(function($) {
+				$("#' . $id . '").change(function() {
+					var type = $(this).is(":checked") ? "text" : "password";
+					$(this).closest(".nr-pass").find(".nr-pass-input input").attr("type", type);
+				})
+			})
+		');
+
+		return '
+			<div class="nr-pass input-flex">
+				<div class="input-flex-item nr-pass-input">'. parent::getInput() .'</div>
+		 		<div class="input-flex-item nr-pass-btn">
+					<input name="' . $id . '" id="' . $id . '" type="checkbox"/>
+					<label for="' . $id . '">'.JText::_("JSHOW").'</label>
+				</div>
+			</div>
+		';
+	}
+}

plugins/system/nrframework/fields/pro.php

@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+class JFormFieldNR_PRO extends JFormField
+{
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string
+     */
+    protected function getInput()
+    {   
+        $label = (string) $this->element['label'];
+        $isFeatureMode = !is_null($label) && !empty($label);
+
+        $buttonText = $isFeatureMode ? 'NR_UNLOCK_PRO_FEATURE' : 'NR_UPGRADE_TO_PRO';
+
+        NRFramework\HTML::renderProOnlyModal();
+
+        $html = '<a style="float:none;" class="btn btn-danger btn-sm" href="#" data-pro-only="' . JText::_($label) . '">';
+
+        if (defined('nrJ4')) 
+        {
+            $html .= '<span class="icon-lock mr-2"></span> ';
+        } else 
+        {
+            if ($isFeatureMode)
+            {
+                $html .= '<span class="icon-lock mr-2" style="position:relative; top:1px;"></span> ';
+            } else 
+            {
+                $html .= '<span class="icon-heart mr-2" style="position:relative; top:2px; left:-1px;"></span> ';
+            }
+        }
+
+        $html .= JText::_($buttonText) . '</a>';
+
+        return $html;
+    }
+}

plugins/system/nrframework/fields/rate.php

@@ -0,0 +1,108 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+JFormHelper::loadFieldClass('text');
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+class JFormFieldNR_Rate extends NRFormField
+{
+	/**
+	 * The form field type.
+	 *
+	 * @var    string
+	 */
+	public $type = 'nr_rate';
+
+	/**
+	 * Method to get the field input markup.
+	 *
+	 * @return  string  The field input markup.
+	 */
+	public function getInput()
+	{
+		// Setup properties
+		$this->starwidth = $this->get('starwidth', '25px');
+		$this->numstarts = $this->get('numstars', 5);
+		$this->maxvalue  = $this->get('maxvalue', 5);
+		$this->halfstar  = $this->get('halfstar', 0) ? "true" : "false";
+		$this->spacing   = $this->get('spacing', "3px");
+		$this->ratedfill = $this->get('ratedfill', "#e7711b");
+		$this->value     = empty($this->value) ? 0 : $this->value;
+		
+		static $run;
+		if (!$run)
+		{
+			// Add styles and scripts to DOM
+			JHtml::_('jquery.framework');
+			JHtml::script('plg_system_nrframework/vendor/jquery.rateyo.min.js', ['relative' => true, 'version' => true]);
+			JHtml::stylesheet('plg_system_nrframework/vendor/jquery.rateyo.min.css', ['relative' => true, 'version' => true]);
+
+			$this->doc->addStyleDeclaration('
+				.nr_rate {
+				    display: flex;
+				    align-items: center;
+				}
+				.nr_rate_preview {
+				    background-color: #393939;
+				    color: #fff;
+				    padding: 7px;
+				    font-size: 12px;
+				    line-height: 1;
+				    min-width: 20px;
+				    text-align: center;
+				    border-radius: 2px;
+				    position:relative;
+				    top:2px;
+				}
+				.nr_rate .jq-ry-container {
+				    padding: 0 10px 0 0;
+				}
+				.nr_rate svg {
+				    max-width: unset;
+				}
+			');
+
+			$run = true;
+		}
+
+		$this->doc->addScriptDeclaration('
+			jQuery(function($) {
+				$("#nr_rate_'.$this->id.'").rateYo({
+					rating:    ' . $this->value . ',
+					starWidth: "'. $this->starwidth .'",
+					numStars:  ' . $this->numstarts . ',
+					maxValue:  ' . $this->maxvalue . ',
+					halfStar:  ' . $this->halfstar . ',
+					spacing:   "' . $this->spacing . '",
+					ratedFill: "' . $this->ratedfill . '",
+					onInit: function (rating) {
+						$(this).parent().find(".nr_rate_preview").html(rating);
+					},
+					onSet: function(rating) {
+						$(this).next("input").val(rating);
+					},
+					onChange: function(rating) {
+						$(this).parent().find(".nr_rate_preview").html(rating);
+					}
+				});
+			});
+    	');
+
+		$html[] = '<div class="nr_rate">';
+		$html[] = '<div id="nr_rate_'.$this->id.'"></div>';
+		$html[] = '<input value="' . $this->value . '" name="' . $this->name . '" type="hidden"/>';
+		$html[] = '<span class="nr_rate_preview"></span>';
+		$html[] = '</div>';
+
+		return implode(" ", $html);
+	}
+}

plugins/system/nrframework/fields/rulevaluehint.php

@@ -0,0 +1,32 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+class JFormFieldRuleValueHint extends JFormField
+{
+    protected function getLabel()
+    {
+        return;
+    }
+
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string
+     */
+    protected function getInput()
+    {
+        $ruleName = (string) $this->element['ruleName'];
+        $rule = \NRFramework\Factory::getCondition($ruleName);
+
+        return '<div class="ruleValueHint">' . $rule->getValueHint() . '</div>';
+    }
+}

plugins/system/nrframework/fields/smarttags.php

@@ -0,0 +1,193 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+require_once dirname(__DIR__) . "/helpers/smarttags.php";
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+class JFormFieldNR_SmartTags extends NRFormField
+{
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string  
+     */
+    function getInput()
+    {  
+        $smartTags = new NRSmartTags();
+
+        // Add extra tags by calling an external method
+        if ($tagsMethod = $this->get("tagsMethod", null))
+        {
+            $method = explode("::", $tagsMethod);
+
+            if (is_array($method))
+            {
+                $extraTags = call_user_func($method);
+                $smartTags->add($extraTags);     
+            }
+        }
+
+    	$tags = $smartTags->get();
+
+        if (!$tags || !is_array($tags))
+        {
+            return;
+        }
+
+    	$html[] = '
+    		<div class="nrSmartTags">
+			    <a class="nrst-btn" 
+                    href="#" 
+                    data-show-label="' . JText::_("NR_SMARTTAGS_SHOW") . '" 
+                    data-hide-label="' . JText::_("NR_SMARTTAGS_HIDE") . '">
+                        <span class="icon icon-tag"></span>
+                        <span class="l">' . $this->prepareText($this->get("linklabel", "NR_SMARTTAGS_SHOW")) . '</span>
+                </a>
+                <div class="nrst-wrap">
+    		    <div class="nrst-list">';
+
+    	foreach ($tags as $tag => $value)
+    	{
+    		$html[] = '<div><a href="#" data-clipboard="' . $tag . '">' . $tag . '</a></div>';
+    	}
+
+    	$html[] = '</div></div></div>';
+
+        $this->addScript();
+
+    	return implode(" ", $html);
+    }
+
+    /**
+     *  Adds field's script and CSS into the document once
+     */
+    private function addScript()
+    {
+    	static $run;
+
+    	if ($run)
+    	{
+    		return;
+    	}
+
+        // Add script
+    	$this->doc->addScriptDeclaration('
+			jQuery(function($) {
+				$(".nrst-btn").click(function() {
+                    list = $(this).next();
+                    $(this).find(".l").html(list.is(":visible") ? $(this).data("show-label") : $(this).data("hide-label"));
+                    list.slideToggle();
+				})
+
+                $(".nrst-list a").click(function() {
+                    var tag = $(this);
+                    copyTextToClipboard(tag.data("clipboard"), function(success) {
+                        if (success) {
+                            tag.addClass("copied");
+                        }
+
+                        setTimeout(function() {
+                            tag.removeClass("copied");
+                        }, 1000);
+                    });
+
+                    return false;
+                });
+
+                function copyTextToClipboard(text, callback) {
+                    var textArea = document.createElement("textarea");
+                    textArea.style.position = "fixed";
+                    textArea.style.top = 0;
+                    textArea.style.left = 0;
+                    textArea.style.width = "2em";
+                    textArea.style.height = "2em";
+                    textArea.style.background = "transparent";
+                    textArea.value = text;
+                    document.body.appendChild(textArea);
+                    textArea.select();
+
+                    try {
+                        var success = document.execCommand("copy");
+                        callback(success);
+                    } catch (err) {
+                        callback(false);
+                    }
+
+                    document.body.removeChild(textArea);
+                }
+			})
+    	');
+
+        // Add height
+        if ($height = $this->get("height", null))
+        {
+            $this->doc->addStyleDeclaration('
+                .nrst-wrap {
+                    height: ' . $height . ';
+                    overflow-x: hidden;
+                    padding-right: 10px;
+                }'
+            );
+        }
+
+        // Add CSS
+    	$this->doc->addStyleDeclaration('
+			.nrst-wrap {
+                display:none;
+            }
+            .nrst-list {
+				display:flex;
+				flex-wrap: wrap;
+				margin:10px -3px 0 -3px;
+			}
+			.nrst-list div {
+				min-width:50%;
+			}
+			.nrst-list a {
+                -webkit-transition: background 150ms ease;
+                -moz-transition: background 150ms ease;
+                transition: background 150ms ease;
+                color: inherit;
+                text-decoration: none;
+				display: block;
+				border: solid 1px #ddd;
+				padding: 7px;
+				line-height: 1;
+				margin: 3px;
+				font-size: 12px;
+			}
+            .nrst-list a:hover {
+                background-color:#eee;
+            }
+            .nrst-list a:after {
+                font-family: "IcoMoon";
+                font-style: normal;
+                speak: none;
+                float: right;
+                font-size: 10px;
+                line-height: 1;
+            }
+            .nrst-list a:hover:after {
+                content: "\e018";
+            }
+            .nrst-list a.copied {
+                background:#dff0d8;
+            }
+            .nrst-list a.copied:after {
+                content: "\47";
+                color: green;
+            }
+    	');
+
+    	$run = true;
+    }
+}

plugins/system/nrframework/fields/smarttagsbox.php

@@ -0,0 +1,102 @@
+<?php
+
+/**
+ * @package         Convert Forms
+ * @version         3.2.12 Free
+ * 
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2022 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+defined('_JEXEC') or die('Restricted access');
+
+use NRFramework\SmartTags;
+
+class JFormFieldSmartTagsBox extends JFormField
+{
+    /**
+     * Undocumented variable
+     *
+     * @var string
+     */
+    public $input_selector = '.show-smart-tags';
+
+    /**
+     *  Disable field label
+     *
+     *  @return  boolean
+     */
+    protected function getLabel()
+    {
+        return false;
+    }
+
+    /**
+     * Method to get a list of options for a list input.
+     *
+     * @return  array   An array of JHtml options.
+     */
+    protected function getInput()
+    {
+        JHtml::_('script', 'plg_system_nrframework/smarttagsbox.js', ['version' => 'auto', 'relative' => true]);
+        JHtml::_('stylesheet', 'plg_system_nrframework/smarttagsbox.css', ['version' => 'auto', 'relative' => true]);
+
+        JText::script('NR_SMARTTAGS_NOTFOUND');
+        JText::script('NR_SMARTTAGS_SHOW');
+
+        JFactory::getDocument()->addScriptOptions('SmartTagsBox', [
+            'selector' => $this->input_selector,
+            'tags'     => [
+                'Joomla' => [
+                    '{page.title}'     => 'Page Title',
+                    '{url}'            => 'Page URL',
+                    '{url.path}'       => 'Page Path',
+                    '{page.lang}'      => 'Page Language Code',
+                    '{page.langurl}'   => 'Page Language URL',
+                    '{page.desc}'      => 'Page Meta Description',
+                    '{site.name}'      => 'Site Name',
+                    '{site.url}'       => 'Site URL',
+                    '{site.email}'     => 'Site Email',
+                    '{user.id}'        => 'User ID',
+                    '{user.username}'  => 'User Username',
+                    '{user.email}'     => 'User Email',
+                    '{user.name}'      => 'User Full name',
+                    '{user.firstname}' => 'User First name',
+                    '{user.lastname}'  => 'User Last name',
+                    '{user.groups}'    => 'User Group IDs',
+                    '{user.registerdate}' => 'User Registration Date',
+                ],
+                'Visitor' => [
+                    '{client.device}'    => 'Visitor Device Type',  
+                    '{ip}'               => 'Visitor IP Address',
+                    '{client.browser}'   => 'Visitor Browser',
+                    '{client.os}'        => 'Visitor Operating System',
+                    '{client.useragent}' => 'Visitor User Agent String',
+                    '{client.id}'        => JText::_('NR_TAG_CLIENTID'),
+                    '{geo.country}'      => JText::_('NR_TAG_GEOCOUNTRY'),
+                    '{geo.countrycode}'  => JText::_('NR_TAG_GEOCOUNTRYCODE'),
+                    '{geo.city}'         => JText::_('NR_TAG_GEOCITY'),
+                    '{geo.location}'     => JText::_('NR_TAG_GEOLOCATION'),
+                ],
+                'Other' => [
+                    '{date}'  => 'Date',
+                    '{time}'  => 'Time',
+                    '{day}'   => 'Day',
+                    '{month}' => 'Month',
+                    '{year}'  => 'Year',
+                    '{referrer}' => 'Referrer URL',
+                    '{randomid}' => 'Random ID',
+                    '{querystring.YOUR_KEY}' => 'Query String',
+                    '{language.YOUR_KEY}' => 'Language String',
+                    '{post.YOUR_KEY}' => 'POST Data'
+                ]
+            ]
+        ]);
+
+        // Render box layout
+        $layout = new JLayoutFile('smarttagsbox', JPATH_PLUGINS . '/system/nrframework/layouts');
+        return $layout->render();
+    }
+}

plugins/system/nrframework/fields/tfbordercontrol.php

@@ -0,0 +1,92 @@
+<?php
+
+/**
+ * @package         Convert Forms
+ * @version         3.2.12 Free
+ * 
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+defined('_JEXEC') or die('Restricted access');
+
+class JFormFieldTFBorderControl extends JFormField
+{
+    protected function getInput()
+    {
+        // Control Group Class
+        $control_group_class = (string) $this->element['control_group_class'];
+
+        // Hides the inner control labels
+        $hide_labels = (bool) $this->element['hide_labels'];
+        $hiddenLabel = $hide_labels ? 'hiddenLabel="true"' : '';
+
+        // Prefix and suffix for the fieldset
+        $prefix = $suffix = '';
+        
+        // Whether to display the fields inline
+        $inline = (bool) $this->element['inline'];
+        if ($inline)
+        {
+            $prefix = '<field name="border_control_row_start" type="nr_inline" />';
+            $suffix = '<field name="border_control_row_end" type="nr_inline" end="1" />';
+        }
+        
+        $form_source = new SimpleXMLElement('
+            <form>
+                <fieldset name="border">
+                    ' . $prefix . '
+                    <field name="style" type="list"
+                        ' . $hiddenLabel . '
+                        label="NR_STYLE"
+                        description="NR_BORDER_CONTROL_STYLE_DESC"
+                        required="' . $this->required . '"
+                        disabled="' . $this->disabled . '">
+                        <option value="none">NR_NONE</option>
+						<option value="solid">NR_SOLID</option>
+						<option value="dotted">NR_DOTTED</option>
+						<option value="dashed">NR_DASHED</option>
+						<option value="double">NR_DOUBLE</option>
+						<option value="groove">NR_GROOVE</option>
+						<option value="ridge">NR_RIDGE</option>
+                    </field>
+                    <field name="width" type="nrnumber"
+                        ' . $hiddenLabel . '
+                        label="NR_WIDTH"
+                        description="NR_BORDER_WIDTH_DESC"
+                        class="input-small"
+						default="0"
+                        required="' . $this->required . '"
+                        disabled="' . $this->disabled . '"
+                        addon="px"
+						showon="style!:none"
+                    />
+                    <field name="color" type="color"
+                        ' . $hiddenLabel . '
+                        label="NR_COLOR"
+                        description="NR_BORDER_COLOR_DESC"
+						keywords="transparent,none"
+						format="rgba"
+						position="bottom"
+                        required="' . $this->required . '"
+                        disabled="' . $this->disabled . '"
+						showon="style!:none"
+                    />
+                    ' . $suffix . '
+                </fieldset>
+            </form>
+        ');
+
+        $control  = $this->name;
+        $formname = 'border.' . str_replace(['jform[', '[', ']'], ['', '.', ''], $control);
+
+        $form = JForm::getInstance($formname, $form_source->asXML(), ['control' => $control]);
+        $form->bind($this->value);
+
+        return $form->renderFieldset('border', [
+            'class' => $control_group_class
+        ]);
+    }
+}

plugins/system/nrframework/fields/tfborderradiuscontrol.php

@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * @package         Convert Forms
+ * @version         3.2.12 Free
+ * 
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+defined('_JEXEC') or die('Restricted access');
+
+require 'tfdimensioncontrol.php';
+
+class JFormFieldTFBorderRadiusControl extends JFormFieldTFDimensionControl
+{
+    /**
+     * Set the dimensions.
+     * 
+     * @var  array
+     */
+    protected $dimensions = [
+        'top_left' => 'NR_TOP_LEFT',
+        'top_right' => 'NR_TOP_RIGHT',
+        'bottom_right' => 'NR_BOTTOM_RIGHT',
+        'bottom_left' => 'NR_BOTTOM_LEFT'
+    ];
+}

plugins/system/nrframework/fields/tfdimensioncontrol.php

@@ -0,0 +1,116 @@
+<?php
+
+/**
+ * @package         Convert Forms
+ * @version         3.2.12 Free
+ * 
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+defined('_JEXEC') or die('Restricted access');
+
+JFormHelper::loadFieldClass('text');
+
+class JFormFieldTFDimensionControl extends JFormFieldText
+{
+    /**
+     * Set the dimensions.
+     * 
+     * @var  array
+     */
+    protected $dimensions = [
+        'top' => 'NR_TOP',
+        'right' => 'NR_RIGHT',
+        'bottom' => 'NR_BOTTOM',
+        'left' => 'NR_LEFT'
+    ];
+
+    /**
+     * Set whether the linked button will be enabled or not.
+     * 
+     * @var  boolean
+     */
+    protected $linked = true;
+    
+    /**
+     * Method to get a list of options for a list input.
+     * @return  array  An array of JHtml options.
+     */
+    protected function getInput()
+    {
+        if (!$this->dimensions = isset($this->element['dimensions']) ? $this->parseDimensions($this->element['dimensions']) : $this->dimensions)
+        {
+            return;
+        }
+     
+        $this->assets();
+   
+        $this->linked = isset($this->element['linked']) ? (boolean) $this->element['linked'] : (isset($this->value->linked) ? (boolean) $this->value->linked : $this->linked);
+        
+        $payload = [
+            'dimensions' => $this->dimensions,
+            'linked' => $this->linked,
+            'name' => $this->name,
+            'value' => $this->value
+        ];
+
+        $layout = new JLayoutFile('dimension', JPATH_PLUGINS . '/system/nrframework/layouts/controls');
+        return $layout->render($payload);
+    }
+
+    /**
+     * Prepares the given dimensions.
+     * 
+     * Input:
+     * 
+	 * - top:NR_TOP,right:NR_RIGHT,bottom:NR_BOTTOM,left:NR_LEFT
+	 * - top_left:Top Left,top_right:Top Right,bottom_right:Bottom Right,bottom_left:Bottom Left
+     * 
+     * @param  array  $dimensions
+     * 
+     * @return array
+     */
+    private function parseDimensions($dimensions = [])
+    {
+        $pairs = explode(',', $dimensions);
+        
+        $parsed = [];
+
+        if (empty(array_filter($pairs)))
+        {
+            return [];
+        }
+
+        foreach ($pairs as $key => $pair)
+        {
+            if (!$value = explode(':', $pair))
+            {
+                continue;
+            }
+
+            // We expect 2 key,value pairs
+            if (count($value) !== 2)
+            {
+                continue;
+            }
+
+            $parsed[$value[0]] = \JText::_($value[1]);
+        }
+
+        return $parsed;
+    }
+
+    /**
+     * Load field assets.
+     * 
+     * @return  void
+     */
+    private function assets()
+    {
+        JHtml::stylesheet('plg_system_nrframework/controls/dimension.css', ['relative' => true, 'versioning' => 'auto']);
+        JHtml::script('plg_system_nrframework/controls/dimension.js', ['relative' => true, 'version' => true]);
+    }
+}

plugins/system/nrframework/fields/tfinputrepeater.php

@@ -0,0 +1,95 @@
+<?php
+
+/**
+ * @package         Convert Forms
+ * @version         3.2.12 Free
+ * 
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+defined('_JEXEC') or die('Restricted access');
+
+JFormHelper::loadFieldClass('subform');
+
+class JFormFieldTFInputRepeater extends JFormFieldSubform
+{
+    /**
+	 * Method to attach a Form object to the field.
+	 *
+	 * @param   \SimpleXMLElement  $element  The SimpleXMLElement object representing the <field /> tag for the form field object.
+	 * @param   mixed              $value    The form field value to validate.
+	 * @param   string             $group    The field name group control value.
+	 *
+	 * @return  boolean  True on success.
+	 *
+	 * @since   3.6
+	 */
+	public function setup(\SimpleXMLElement $element, $value, $group = null)
+	{
+        $element->addAttribute('multiple', true);
+        
+        // By default initialize the field with an empty item.
+        if (empty($value))
+        {
+            $value = [0 => ''];
+        }
+
+        // In case we have provided a default value in the XML in JSON format
+        if ($value && is_string($value))
+        {
+            // Attempt to decode as JSON
+            $value_ = json_decode($value, true);
+
+            // If JSON decode fails, expect comma-separated or newline-separated values
+            if (is_null($value_))
+            {
+                $value = NRFramework\Functions::makeArray($value);
+
+                $new_value = [];
+
+                foreach ($value as $key => $val)
+                {
+                    $new_value['value' . $key] = [
+                        'value' => $val
+                    ];
+                }
+
+                $value = $new_value;
+            } else 
+            {
+                $value = $value_;
+            }
+        }
+
+		parent::setup($element, $value, $group);
+
+		return true;
+	}
+
+    /**
+     * Method to get a list of options for a list input.
+     * @return  array  An array of JHtml options.
+     */
+    protected function getInput()
+    {
+        $this->layout = 'joomla.form.field.subform.repeatable-table';
+
+        $this->assets();
+
+        return '<div class="tf-input-repeater ' . $this->class . '">' . parent::getInput() . '<a href="#" class="btn tf-input-repeater-add"><span class="icon-plus"></span></a></div>';
+    }
+
+    /**
+     * Load field assets.
+     * 
+     * @return  void
+     */
+    private function assets()
+    {
+        JHtml::stylesheet('plg_system_nrframework/tfinputrepeater.css', ['relative' => true, 'versioning' => 'auto']);
+        JHtml::script('plg_system_nrframework/tfinputrepeater.js', ['relative' => true, 'version' => true]);
+    }
+}

plugins/system/nrframework/fields/time.php

@@ -0,0 +1,94 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+class JFormFieldNR_Time extends NRFormField
+{
+
+	/**
+	 * Sets the time value
+	 * 
+	 * @var  string  $time_value
+	 */
+	private $time_value = null;
+
+	/**
+	 * Method to get the field input markup.
+	 *
+	 * @return  string  The field input markup.
+	 */
+	public function getInput()
+	{
+		// Setup properties
+		$this->hint      = $this->get('hint', '00:00');
+		$this->class     = $this->get('class');
+		$this->placement = $this->get('placement', 'top');
+		$this->align     = $this->get('align', 'left');
+		$this->autoclose = $this->get('autoclose', 'true');
+		$this->default   = $this->get('default', 'now');
+		$this->donetext  = $this->get('donetext', 'Done');
+		$this->required  = $this->get('required') === 'true';
+
+		/**
+		 * When an object is created using this class, it cannot set $this->value
+		 * So we set $time_value and then use it's value to display the time
+		 */
+		$this->value = !is_null($this->time_value) ? $this->time_value : $this->value;
+
+		// Add styles and scripts to DOM
+		JHtml::_('jquery.framework');
+		JHtml::script('plg_system_nrframework/vendor/jquery-clockpicker.min.js', ['relative' => true, 'version' => true]);
+		JHtml::stylesheet('plg_system_nrframework/vendor/jquery-clockpicker.min.css', ['relative' => true, 'version' => true]);
+
+		static $run;
+		// Run once to initialize it
+		if (!$run)
+		{
+			$this->doc->addScriptDeclaration('
+				jQuery(function($) {
+					$(".clockpicker").clockpicker();
+				});
+        	');
+
+			// Fix a CSS conflict caused by the template.css on Joomla 3
+			if (!defined('nrJ4'))
+			{
+				// Fuck you template.css
+				$this->doc->addStyleDeclaration('
+					.clockpicker-align-left.popover > .arrow {
+					    left: 25px;
+					}
+				');
+			}
+
+			$run = true;
+		}
+
+		return '
+			<div class="clockpicker" data-donetext="' . $this->donetext . '" data-default="' . $this->default . '" data-placement="' . $this->placement . '" data-align="' . $this->align . '" data-autoclose="' . $this->autoclose . '">
+				' . parent::getInput() . '
+			</div>';
+	}
+
+	/**
+	 * Sets the $time_value of the time when created as an object
+	 * due to not being able to set the $this->value byitself
+	 * 
+	 * @param   string  $value
+	 * 
+	 * @return  void
+	 */
+	public function setValue($value)
+	{
+		$this->time_value = $value;
+	}
+}

plugins/system/nrframework/fields/treeselect.php

@@ -0,0 +1,162 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+use \NRFramework\HTML;
+
+defined('_JEXEC') or die;
+
+abstract class JFormFieldNRTreeSelect extends JFormField
+{
+	/**
+	 * Database object
+	 *
+	 * @var object
+	 */
+	public $db;
+
+	/**
+	 * Indicates whether the options array should be sorted before render.
+	 *
+	 * @var boolean
+	 */
+	protected $sortTree = false;
+	
+	/**
+	 * Indicates whether the options array should have the levels re-calculated
+	 * 
+	 * @var boolean
+	 */
+    protected $fixLevels = false;
+    
+    /**
+     * Increase the value(ID) of the category by one.
+	 * This happens because we have a parent category "Bussiness Directory" that pushes-in the indentation
+	 * and we reset it by decreasing the value, level and parent.
+     * 
+     * @var boolean
+     */
+    protected $increaseValue = false;
+
+	/**
+	 * Output the HTML for the field
+	 */
+	protected function getInput()
+	{
+		$this->db = JFactory::getDbo();
+
+		$options = $this->getOptions();
+
+		if ($this->sortTree)
+		{
+			$options = $this->sortTreeSelectOptions($options);
+		}
+
+        if ($this->fixLevels)
+        {
+			$options = $this->fixLevels($options);
+        }
+        
+        if ($this->increaseValue)
+        {
+            // Increase by 1 the value(ID) of the category
+            foreach ($options as $key => $value)
+            {
+                $options[$key]->value+=1;
+            }
+        }
+
+		return HTML::treeselect($options, $this->name, $this->value, $this->id);
+	}
+
+	/**
+     *  Sorts treeselect options
+     * 
+     *  @param  array $options
+     *  @param  int   $parent_id
+     * 
+     *  @return array
+     */
+    protected function sortTreeSelectOptions($options, $parent_id = 0)
+    {
+        if (empty($options))
+        {
+            return [];
+        }
+
+        $result = [];
+
+        $sub_options = array_filter($options, function($option) use($parent_id)
+        {
+            return $option->parent == $parent_id;
+        });
+
+        foreach ($sub_options as $option)
+        {
+            $result[] = $option;
+            $result = array_merge($result, $this->sortTreeSelectOptions($options, $option->value));
+        }
+
+        return $result;
+	}
+	
+	/**
+     *  Fixes the levels of the categories
+     * 
+     *  @param  array $categories
+     * 
+     *  @return array
+     */
+    protected function fixLevels($cats)
+    {
+		// new categories
+		$categories = [];
+		
+        // get category levels
+        foreach ($cats as $c)
+        {
+            $level = 0;
+            $parent_id = (int)$c->parent;
+
+            while ($parent_id)
+            {
+                $level++;
+                $parent_id = $this->getNextParentId($cats, $parent_id);
+			}
+			
+            $c->level = $level;
+            $categories[] = $c;
+		}
+		
+		return $categories;
+	}
+
+    /**
+     *  Returns the next parent id
+     *  Helper method for getCategories
+     * 
+     *  @return int
+     */
+    protected function getNextParentId($categories, $current_pid)
+    {
+        foreach($categories as $c)
+        {
+            if ((int)$c->value === $current_pid)
+            {
+                return (int)$c->parent;
+            }
+        }
+    }
+
+	/**
+	 * Get tree options as an Array of objects
+	 * Each object should have the attributes: value, text, parent, level, disable
+	 *
+	 * @return object
+	 */
+	abstract protected function getOptions();
+}

plugins/system/nrframework/fields/users.php

@@ -0,0 +1,53 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+use \NRFramework\HTML;
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+class JFormFieldNR_Users extends NRFormField
+{
+	public $type = 'Users';
+
+	protected function getInput()
+	{
+		$this->params = $this->element->attributes();
+
+		if (!is_array($this->value))
+		{
+			$this->value = explode(',', $this->value);
+		}
+
+		$options = $this->getUsers();
+
+		$size     = (int) $this->get('size', 300);
+
+		return HTML::treeselectSimple($options, $this->name, $this->value, $this->id, $size);
+	}
+
+	public function getUsers()
+	{
+		$query = $this->db->getQuery(true)
+			->select('COUNT(u.id)')
+			->from('#__users AS u')
+			->where('u.block = 0');
+		$this->db->setQuery($query);
+		$total = $this->db->loadResult();
+
+		$query->clear('select')
+			->select('u.name, u.username, u.id')
+			->order('name');
+		$this->db->setQuery($query);
+		$list = $this->db->loadObjectList();
+
+		return $this->getOptionsByList($list, array('username', 'id'));
+	}
+}

plugins/system/nrframework/fields/virtuemartcomponentitems.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+use Joomla\Registry\Registry;
+
+require_once __DIR__ . '/componentitems.php';
+
+class JFormFieldVirtueMartComponentItems extends JFormFieldComponentItems
+{
+    public function init()
+    {
+        // Get default language
+        $this->element['table'] = 'virtuemart_products_' . $this->getLanguage();
+
+        parent::init();
+    }
+
+	/**
+     *  VirtueMart is using different tables per language. Therefore, we need to use their API to get the default language code
+     *
+     *  @return  string
+     */
+    private function getLanguage($default = 'en_gb')
+    {	
+		// Silent inclusion.
+		@include_once JPATH_ADMINISTRATOR . '/components/com_virtuemart/helpers/config.php'; 
+
+        if (!class_exists('VmConfig'))
+		{
+			return $default;
+        }
+            
+        // Init configuration
+		VmConfig::loadConfig();
+		
+        return VmConfig::$jDefLang;
+    }
+
+    protected function getItems()
+    {
+        $items = parent::getItems();
+
+        // If text is not properly decoded, decode it
+        $items = array_map(function($item) {
+            $item->text = html_entity_decode($item->text);
+            return $item;
+        }, $items);
+        
+        return $items;
+    }
+}

plugins/system/nrframework/fields/well.php

@@ -0,0 +1,95 @@
+<?php
+
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2021 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+// No direct access to this file
+defined('_JEXEC') or die;
+
+require_once dirname(__DIR__) . '/helpers/field.php';
+
+class JFormFieldNR_Well extends NRFormField
+{
+    /**
+     * The field type.
+     *
+     * @var string
+     */
+    public $type = 'nr_well';
+
+    /**
+     * Layout to render the form field
+     *
+     * @var  string
+     */
+    protected $renderLayout = 'well';
+
+    /**
+     * Override renderer include path
+     *
+     * @return  array
+     */
+    protected function getLayoutPaths()
+    {
+        return JPATH_PLUGINS . '/system/nrframework/layouts/';
+    }
+
+    /**
+     *  Method to render the input field
+     *
+     *  @return  string  
+     */
+    protected function getInput()
+    {   
+        JHtml::stylesheet('plg_system_nrframework/fields.css', ['relative' => true, 'version' => 'auto']);
+
+        $title       = $this->get('label');
+        $description = $this->get('description');
+        $url         = $this->get('url');
+        $class       = $this->get('class');
+        $start       = $this->get('start', 0);
+        $end         = $this->get('end', 0);
+        $info        = $this->get("html", null);
+
+        if ($info)
+        {
+            $info = str_replace("{{", "<", $info);
+            $info = str_replace("}}", ">", $info);
+        }
+
+        $html = array();
+
+        if ($start || !$end)
+        {
+            if ($title)
+            {
+                $html[] = '<h4>' . $this->prepareText($title) . '</h4>';
+            }
+            if ($description)
+            {
+                $html[] = '<div class="well-desc">' . $this->prepareText($description) . $info . '</div>';
+            }
+
+            if ($url)
+            {
+                if (defined('nrJ4'))
+                {
+                    $html[] = '<a class="btn btn-outline-secondary btn-sm wellbtn" target="_blank" href="' . $url . '"><span class="icon-info-circle"></span></a>';
+                } else 
+                {
+                    $html[] = '<a class="btn btn-secondary wellbtn" target="_blank" href="' . $url . '"><span class="icon-info"></span></a>';
+                }
+            }
+        }
+
+        if ($end) {
+            $html[] = '</div>';
+        }
+
+        return implode('', $html);
+    }
+}