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classes/Smarty/SmartyCacheResourceMysql.php

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+<?php
+/**
+ * Copyright since 2007 PrestaShop SA and Contributors
+ * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Open Software License (OSL 3.0)
+ * that is bundled with this package in the file LICENSE.md.
+ * It is also available through the world-wide-web at this URL:
+ * https://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@prestashop.com so we can send you a copy immediately.
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
+ * versions in the future. If you wish to customize PrestaShop for your
+ * needs please refer to https://devdocs.prestashop.com/ for more information.
+ *
+ * @author    PrestaShop SA and Contributors <contact@prestashop.com>
+ * @copyright Since 2007 PrestaShop SA and Contributors
+ * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ */
+class Smarty_CacheResource_Mysql extends Smarty_CacheResource_Custom
+{
+    /**
+     * fetch cached content and its modification time from data source.
+     *
+     * @param string $id unique cache content identifier
+     * @param string $name template name
+     * @param string $cache_id cache id
+     * @param string $compile_id compile id
+     * @param string $content cached content
+     * @param int $mtime cache modification timestamp (epoch)
+     */
+    protected function fetch($id, $name, $cache_id, $compile_id, &$content, &$mtime)
+    {
+        $row = Db::getInstance()->getRow('SELECT modified, content FROM ' . _DB_PREFIX_ . 'smarty_cache WHERE id_smarty_cache = "' . pSQL($id, true) . '"');
+        if ($row) {
+            $content = $row['content'];
+            $mtime = strtotime($row['modified']);
+        } else {
+            $content = null;
+            $mtime = null;
+        }
+    }
+
+    /**
+     * Fetch cached content's modification timestamp from data source.
+     *
+     * @note implementing this method is optional. Only implement it if modification times can be accessed faster than loading the complete cached content.
+     *
+     * @param string $id unique cache content identifier
+     * @param string $name template name
+     * @param string $cache_id cache id
+     * @param string $compile_id compile id
+     *
+     * @return int|bool timestamp (epoch) the template was modified, or false if not found
+     */
+    protected function fetchTimestamp($id, $name, $cache_id, $compile_id)
+    {
+        $value = Db::getInstance()->getValue('SELECT modified FROM ' . _DB_PREFIX_ . 'smarty_cache WHERE id_smarty_cache = "' . pSQL($id, true) . '"');
+        $mtime = strtotime($value);
+
+        return $mtime;
+    }
+
+    /**
+     * Save content to cache.
+     *
+     * @param string $id unique cache content identifier
+     * @param string $name template name
+     * @param string $cache_id cache id
+     * @param string $compile_id compile id
+     * @param int|null $exp_time seconds till expiration time in seconds or null
+     * @param string $content content to cache
+     *
+     * @return bool success
+     */
+    protected function save($id, $name, $cache_id, $compile_id, $exp_time, $content)
+    {
+        Db::getInstance()->execute('
+		REPLACE INTO ' . _DB_PREFIX_ . 'smarty_cache (id_smarty_cache, name, cache_id, content)
+		VALUES (
+			"' . pSQL($id, true) . '",
+			"' . pSQL(sha1($name)) . '",
+			"' . pSQL($cache_id, true) . '",
+			"' . pSQL($content, true) . '"
+		)');
+
+        return (bool) Db::getInstance()->Affected_Rows();
+    }
+
+    /**
+     * Delete content from cache.
+     *
+     * @param string $name template name
+     * @param string $cache_id cache id
+     * @param string $compile_id compile id
+     * @param int|null $exp_time seconds till expiration or null
+     *
+     * @return int number of deleted caches
+     */
+    protected function delete($name, $cache_id, $compile_id, $exp_time)
+    {
+        // delete the whole cache
+        if ($name === null && $cache_id === null && $compile_id === null && $exp_time === null) {
+            // returning the number of deleted caches would require a second query to count them
+            Db::getInstance()->execute('TRUNCATE TABLE ' . _DB_PREFIX_ . 'smarty_cache');
+
+            return -1;
+        }
+
+        $where = [];
+        if ($name !== null) {
+            $where[] = 'name = "' . pSQL(sha1($name)) . '"';
+        }
+        if ($exp_time !== null) {
+            $where[] = 'modified < DATE_SUB(NOW(), INTERVAL ' . (int) $exp_time . ' SECOND)';
+        }
+        if ($cache_id !== null) {
+            $where[] = '(cache_id  = "' . pSQL($cache_id, true) . '" OR cache_id LIKE "' . pSQL($cache_id . '|%', true) . '")';
+        }
+
+        Db::getInstance()->execute('DELETE FROM ' . _DB_PREFIX_ . 'smarty_cache WHERE ' . implode(' AND ', $where));
+
+        return Db::getInstance()->Affected_Rows();
+    }
+}