<?php
namespace Domain\Cron;

class CronRepository
{
  private $db;

  public function __construct($db)
  {
    $this->db = $db;
  }

  public function automaticUpdateSites()
  {
    $results = $this->db->query( "SELECT id, url FROM projects WHERE automatic_update = 1 AND DATE_ADD( last_update, INTERVAL 1 WEEK ) <= '" . date( 'Y-m-d H:i:s' ) . "'" )->fetchAll();
    if ( is_array( $results ) and !empty( $results ) ) foreach ( $results as $row )
    {
      $this->db->delete( 'project_links_internal', [ 'AND' => [ 'project_id' => $row['id'], 'parent_id[!]' => null ] ] );
      $this->db->delete( 'project_links_external', [ 'project_id' => $row['id'] ] );
      $this->db->update( 'project_links_internal', [ 'visited' => 0 ], [ 'project_id' => $row['id'] ] );

      $this->db->update( 'projects', [ 'last_update' => date( 'Y-m-d H:i:s' ) ], [ 'id' => $row['id'] ] );

      return [ 'status' => 'ok', 'msg' => 'Ponawiam sprawdzanie strony <a href="' . $row['url'] . '" target="_blank">' . $row['url'] . '</a>' ];
    }
    return [ 'status' => 'empty' ];
  }

  public function getSiteMainLinks()
  {
    $results = $this->db->query( 'SELECT id, url FROM projects WHERE id NOT IN ( SELECT project_id FROM project_links_internal GROUP BY project_id ) AND enabled = 1 LIMIT 1' )->fetchAll();
    if ( is_array( $results ) and !empty ( $results ) ) foreach ( $results as $row )
    {
      $ch = curl_init();
      curl_setopt( $ch, CURLOPT_URL, $row['url'] );
      curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
      curl_setopt( $ch, CURLOPT_VERBOSE, 1 );
      curl_setopt( $ch, CURLOPT_TIMEOUT, 60 );
      curl_setopt( $ch, CURLOPT_HEADER, true );
      curl_setopt( $ch, CURLOPT_CAINFO, 'cacert.pem' );
      curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, false );
      curl_setopt( $ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.103 Safari/537.36' );
      $response = curl_exec( $ch );
      curl_close ( $ch );

      if ( !curl_errno( $ch ) )
      {
        $this->db->insert( 'project_links_internal', [
                'project_id' => $row['id'],
                'url' => $row['url'],
                'parent_id' => null
              ] );

        $doc = new \DOMDocument;
        $doc->loadHTML( $response );
        foreach ( $doc->getElementsByTagName( 'a' ) as $link )
        {
          $url = $link->getAttribute( 'href' );

          if ( \S::is_url_internal( $row['url'], $url ) )
          {
            if ( strpos( $url, '#' ) !== false )
              $url = rtrim( substr( $url, 0, strpos( $url, '#' ) ), '?,#' );

            $url = \S::modify_internal_link( $row['url'], $url );

            if ( !filter_var( $url, FILTER_VALIDATE_URL ) === false and !$this->db->count( 'project_links_internal', [ 'AND' => [ 'project_id' => $row['id'], 'url' => $url ] ] ) )
            {
              $this->db->insert( 'project_links_internal', [
                        'project_id' => $row['id'],
                        'url' => $url
                      ] );
            }
          }
        }
        return [ 'status' => 'ok', 'msg' => 'Pobieram linki dla strony <a href="' . $row['url'] . '" target="_blank">' . $row['url'] . '</a>' ];
      }
      else
        return [ 'status' => 'ok', 'msg' => 'Błąd podczas pobierania strony <a href="' . $row['url'] . '" target="_blank">' . $row['url'] . '</a>' ];
    }
    return [ 'status' => 'empty' ];
  }

  public function getSiteOtherLinks()
  {
    $results = $this->db->query( 'SELECT '
                                    . 'pli.id, project_id, pli.url, p.url AS project_url '
                                  . 'FROM '
                                    . 'project_links_internal AS pli '
                                      . 'INNER JOIN projects AS p ON p.id = pli.project_id '
                                  . 'WHERE '
                                    . 'visited = 0 AND enabled = 1 '
                                  . 'LIMIT 1' )->fetchAll();
    if ( is_array( $results ) and !empty( $results ) ) foreach ( $results as $row )
    {
      $url = parse_url( $row['url'] );

      $ch = curl_init();
      curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
      curl_setopt( $ch, CURLOPT_VERBOSE, 1 );
      curl_setopt( $ch, CURLOPT_TIMEOUT, 60 );
      curl_setopt( $ch, CURLOPT_COOKIEFILE, 'temp/cookie.txt' );
      curl_setopt( $ch, CURLOPT_COOKIEJAR, 'temp/cookie.txt' );
      curl_setopt( $ch, CURLOPT_CAINFO, 'cacert.pem' );
      curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, false );
      curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true );
      curl_setopt( $ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.103 Safari/537.36' );

      curl_setopt( $ch, CURLOPT_URL, 'http://' . $url['host'] );
      $response     = curl_exec( $ch );

      curl_setopt( $ch, CURLOPT_URL, $row['url'] );
      $response     = curl_exec( $ch );
      $content_type = curl_getinfo( $ch, CURLINFO_CONTENT_TYPE );
      $code         = curl_getinfo( $ch, CURLINFO_HTTP_CODE );
      curl_close ( $ch );

      if ( !curl_errno( $ch ) and ( $code == 200 or $code == 301 ) and strpos( $content_type, 'text/html' ) !== false )
      {
        $this->getSiteMetaTitle( $row['id'], $response );
        $this->getSiteMetaKeywords( $row['id'], $response );
        $this->getSiteMetaDescription( $row['id'], $response );
        $this->getSiteMetaRobots( $row['id'], $response );
        $this->getSiteMetaGooglebot( $row['id'], $response );
        $this->getSiteCodeLenght( $row['id'], $response );
        $this->getSiteTextLenght( $row['id'], $response );
        $this->getSiteCanonical( $row['id'], $response );
        $this->getTableExists( $row['id'], $response );
        $this->getIframeExists( $row['id'], $response );
        $this->getH1Exists( $row['id'], $response );
        $this->getImagesWithoutAlt( $row['id'], $response );

        /* pobranie linków ze strony */
        $doc = new \DOMDocument;
        $doc->loadHTML( $response );

        foreach ( $doc->getElementsByTagName( 'a' ) as $link )
        {
          $url = $link->getAttribute( 'href' );

          /* linki wewnętrzne na danej postronie */
          if ( \S::is_url_internal( $row['project_url'], $url ) )
          {
            if ( strpos( $url, '#' ) !== false )
              $url = rtrim( substr( $url, 0, strpos( $url, '#' ) ), '?,#' );

            $url  = \S::modify_internal_link( $row['project_url'], $url, $row['url'] );
            $info = pathinfo( $url );

            if ( !filter_var( $url, FILTER_VALIDATE_URL ) === false and !in_array( strtolower( $info['extension'] ), \S::not_html_format() ) and !$this->db->count( 'project_links_internal', [
                    'AND' => [
                      'project_id' => $row['project_id'],
                      'url' => $url
                    ]
                  ] ) )
            {
              $this->db->insert( 'project_links_internal', [
                        'project_id' => $row['project_id'],
                        'url' => $url,
                        'visited' => 0,
                        'parent_id' => $row['id'],
                        'response' => $response
                      ] );
            }
          }
          /* linki zewnętrzne na danej podstronie */
          else
          {
            $link->getAttribute( 'rel' ) == 'nofollow' ? $nofollow = 1 : $nofollow = 0;

            $this->db->insert( 'project_links_external', [
                              'project_id' => $row['project_id'],
                              'link_id' => $row['id'],
                              'url' => $link->getAttribute( 'href' ),
                              'nofollow' => $nofollow,
                              'title' => $link->getAttribute( 'title' )
                            ] );
          }
        }

        $this->db->update( 'project_links_internal', [
                  'visited' => 1,
                  'content_type' => $content_type,
                  'response_code' => $code,
                  'response' => $response
                ], [
                  'id' => $row['id']
                ] );

        return [ 'status' => 'ok', 'msg' => 'Pobieram informacje dla strony <a href="' . $row['url'] . '" target="_blank">' . $row['url'] . '</a>' ];
      }
      else if ( $code == 404 or strpos( $content_type, 'text/html' ) === false )
      {
        $this->db->update( 'project_links_internal', [
                  'visited' => 1,
                  'deleted' => 1,
                  'content_type' => $content_type,
                  'response_code' => $code
                ], [
                  'id' => $row['id']
                ] );

        return [ 'status' => 'ok', 'msg' => 'Pobieram informacje dla strony <a href="' . $row['url'] . '" target="_blank">' . $row['url'] . '</a>' ];
      }
      else if ( $code !== 200 and strpos( $content_type, 'text/html' ) !== false )
      {
        $this->db->update( 'project_links_internal', [
                  'visited' => 1,
                  'content_type' => $content_type,
                  'response_code' => $code,
                  'response' => $response
                ], [
                  'id' => $row['id']
                ] );

        return [ 'status' => 'ok', 'msg' => 'Pobieram informacje dla strony <a href="' . $row['url'] . '" target="_blank">' . $row['url'] . '</a>' ];
      }
      else
        return [ 'status' => 'ok', 'msg' => 'Błąd podczas pobierania strony <a href="' . $row['url'] . '" target="_blank">' . $row['url'] . '</a>' ];
    }
    return [ 'status' => 'empty' ];
  }

  private function getImagesWithoutAlt( $urlId, $response )
  {
    $doc = new \DOMDocument;
    $doc->loadHTML( $response );
    $images = $doc->getElementsByTagName("img");

    $have_images_without_alt = 0;
    foreach ( $images as $img )
    {
      if ( !$img->getAttribute( 'alt' ) )
        $have_images_without_alt = 1;
    }

    $this->db->update( 'project_links_internal', [ 'have_images_without_alt' => $have_images_without_alt ], [ 'id' => $urlId ] );
  }

  private function getTableExists( $urlId, $response )
  {
    $doc = new \DOMDocument;
    $doc->loadHTML( $response );
    $count = $doc->getElementsByTagName("table");

    $this->db->update( 'project_links_internal', [ 'have_table' => $count->length ? 1 : 0 ], [ 'id' => $urlId ] );
  }

  private function getIframeExists( $urlId, $response )
  {
    $doc = new \DOMDocument;
    $doc->loadHTML( $response );
    $count = $doc->getElementsByTagName("iframe");

    $this->db->update( 'project_links_internal', [ 'have_iframe' => $count->length ? 1 : 0 ], [ 'id' => $urlId ] );
  }

  private function getH1Exists( $urlId, $response )
  {
    $doc = new \DOMDocument;
    $doc->loadHTML( $response );
    $count = $doc->getElementsByTagName("h1");
    $this->db->update( 'project_links_internal', [ 'have_h1' => $count->length ? 1 : 0 ], [ 'id' => $urlId ] );
  }

  private function getSiteMetaTitle( $urlId, $response )
  {
    $title = '';

    preg_match('/<title>([^>]*)<\/title>/si', $response, $match );

    if ( isset( $match ) && is_array( $match ) && count( $match ) > 0 )
      $title = (string)strip_tags( $match[1] );

    if ( !$title )
    {
      preg_match_all('/<[\s]*meta[\s]*name="og:?' . '([^>"]*)"?[\s]*' . 'content="?([^>"]*)"?[\s]*[\/]?[\s]*>/si', $response, $match);

      if ( isset ( $match ) && is_array( $match ) && count( $match ) == 3 )
      {
        $originals  = $match[0];
        $names      = $match[1];
        $values     = $match[2];

        if ( count( $originals ) == count( $names ) && count( $names ) == count( $values ) )
        {
          $metaTags = array();
          for ( $i = 0, $limiti = count( $names ); $i < $limiti; $i++ )
          {
            $metaTags[ $names[$i] ] = array(
              'html'  => htmlentities( $originals[$i] ),
              'value' => $values[$i]
            );
          }
        }
        $title = (string)$metaTags['title']['value'];
      }
    }

    $this->db->update( 'project_links_internal', [ 'title' => $title ], [ 'id' => $urlId ] );
  }

  private function getSiteCanonical( $urlId, $response )
  {
    $doc = new \DOMDocument;
    $doc->loadHTML( $response );
    foreach ( $doc->getElementsByTagName( 'link' ) as $link )
    {
      $rel = $link->getAttribute( 'rel' );

      if ( $rel == 'canonical' )
      {
        $canonical = $link->getAttribute( 'href' );
      }
    }

    $this->db->update( 'project_links_internal', [ 'canonical' => $canonical ], [ 'id' => $urlId ] );
  }

  private function getSiteMetaKeywords( $urlId, $response )
  {
    $meta_keywords = '';

    preg_match_all( '/<[\s]*meta[\s]*name="?' . '([^>"]*)"?[\s]*' . 'content="?([^>"]*)"?[\s]*[\/]?[\s]*>/si', $response, $match );

    if ( isset ( $match ) && is_array( $match ) && count( $match ) == 3 )
    {
      $originals  = $match[0];
      $names      = $match[1];
      $values     = $match[2];

      if ( count( $originals ) == count( $names ) && count( $names ) == count( $values ) )
      {
        $metaTags = array();
        for ( $i = 0, $limiti = count( $names ); $i < $limiti; $i++ )
        {
          $metaTags[ $names[$i] ] = array(
            'html'  => htmlentities( $originals[$i] ),
            'value' => $values[$i]
          );
        }
      }
      $meta_keywords = (string)$metaTags['keywords']['value'];
    }

    if ( !$meta_keywords )
    {
      preg_match_all( '/<[\s]*meta[\s]*property="og:?' . '([^>"]*)"?[\s]*' . 'content="?([^>"]*)"?[\s]*[\/]?[\s]*>/si', $response, $match );

      if ( isset ( $match ) && is_array( $match ) && count( $match ) == 3 )
      {
        $originals  = $match[0];
        $names      = $match[1];
        $values     = $match[2];

        if ( count( $originals ) == count( $names ) && count( $names ) == count( $values ) )
        {
          $metaTags = array();
          for ( $i = 0, $limiti = count( $names ); $i < $limiti; $i++ )
          {
            $metaTags[ $names[$i] ] = array(
              'html'  => htmlentities( $originals[$i] ),
              'value' => $values[$i]
            );
          }
        }
        $meta_keywords = (string)$metaTags['keywords']['value'];
      }
    }

    $this->db->update( 'project_links_internal', [ 'meta_keywords' => $meta_keywords ], [ 'id' => $urlId ] );
  }

  private function getSiteMetaDescription( $urlId, $response )
  {
    $meta_description = '';

    preg_match_all('/<[\s]*meta[\s]*name="?' . '([^>"]*)"?[\s]*' . 'content="?([^>"]*)"?[\s]*[\/]?[\s]*>/si', $response, $match);

    if ( isset ( $match ) && is_array( $match ) && count( $match ) == 3 )
    {
      $originals  = $match[0];
      $names      = $match[1];
      $values     = $match[2];

      if ( count( $originals ) == count( $names ) && count( $names ) == count( $values ) )
      {
        $metaTags = array();
        for ( $i = 0, $limiti = count( $names ); $i < $limiti; $i++ )
        {
          $metaTags[ $names[$i] ] = array(
            'html'  => htmlentities( $originals[$i] ),
            'value' => $values[$i]
          );
        }
      }
      $meta_description = (string)$metaTags['description']['value'];
    }

    if ( !$meta_description )
    {
      preg_match_all( '/<[\s]*meta[\s]*property="og:?' . '([^>"]*)"?[\s]*' . 'content="?([^>"]*)"?[\s]*[\/]?[\s]*>/si', $response, $match );

      if ( isset ( $match ) && is_array( $match ) && count( $match ) == 3 )
      {
        $originals  = $match[0];
        $names      = $match[1];
        $values     = $match[2];

        if ( count( $originals ) == count( $names ) && count( $names ) == count( $values ) )
        {
          $metaTags = array();
          for ( $i = 0, $limiti = count( $names ); $i < $limiti; $i++ )
          {
            $metaTags[ $names[$i] ] = array(
              'html'  => htmlentities( $originals[$i] ),
              'value' => $values[$i]
            );
          }
        }
        $meta_description = (string)$metaTags['description']['value'];
      }
    }

    $this->db->update( 'project_links_internal', [ 'meta_description' => $meta_description ], [ 'id' => $urlId ] );
  }

  private function getSiteMetaRobots( $urlId, $response )
  {
    $meta_robots = '';

    preg_match_all('/<[\s]*meta[\s]*name="?' . '([^>"]*)"?[\s]*' . 'content="?([^>"]*)"?[\s]*[\/]?[\s]*>/si', $response, $match);

    if ( isset ( $match ) && is_array( $match ) && count( $match ) == 3 )
    {
      $originals  = $match[0];
      $names      = $match[1];
      $values     = $match[2];

      if ( count( $originals ) == count( $names ) && count( $names ) == count( $values ) )
      {
        $metaTags = array();
        for ( $i = 0, $limiti = count( $names ); $i < $limiti; $i++ )
        {
          $metaTags[ $names[$i] ] = array(
            'html'  => htmlentities( $originals[$i] ),
            'value' => $values[$i]
          );
        }
      }
      $meta_robots = (string)$metaTags['robots']['value'];
    }

    $this->db->update( 'project_links_internal', [ 'meta_robots' => $meta_robots ], [ 'id' => $urlId ] );
  }

  private function getSiteMetaGooglebot( $urlId, $response )
  {
    $meta_googlebot = '';

    preg_match_all('/<[\s]*meta[\s]*name="?' . '([^>"]*)"?[\s]*' . 'content="?([^>"]*)"?[\s]*[\/]?[\s]*>/si', $response, $match);

    if ( isset ( $match ) && is_array( $match ) && count( $match ) == 3 )
    {
      $originals  = $match[0];
      $names      = $match[1];
      $values     = $match[2];

      if ( count( $originals ) == count( $names ) && count( $names ) == count( $values ) )
      {
        $metaTags = array();
        for ( $i = 0, $limiti = count( $names ); $i < $limiti; $i++ )
        {
          $metaTags[ $names[$i] ] = array(
            'html'  => htmlentities( $originals[$i] ),
            'value' => $values[$i]
          );
        }
      }
      $meta_googlebot = (string)$metaTags['googlebot']['value'];
    }

    $this->db->update( 'project_links_internal', [ 'meta_googlebot' => $meta_googlebot ], [ 'id' => $urlId ] );
  }

  private function getSiteCodeLenght( $urlId, $response )
  {
    $this->db->update( 'project_links_internal', [ 'code_lenght' => strlen( $response ) ], [ 'id' => $urlId ] );
  }

  private function getSiteTextLenght( $urlId, $response )
  {
    $this->db->update( 'project_links_internal', [ 'text_lenght' => strlen( \S::strip_html_tags( $response ) ) ], [ 'id' => $urlId ] );
  }
}