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+++ b/library/smarty/demo/plugins/cacheresource.pdo.php
@@ -0,0 +1,312 @@
+<?php
+
+/**
+ * PDO Cache Handler
+ * Allows you to store Smarty Cache files into your db.
+ * Example table :
+ * CREATE TABLE `smarty_cache` (
+ * `id` char(40) NOT NULL COMMENT 'sha1 hash',
+ * `name` varchar(250) NOT NULL,
+ * `cache_id` varchar(250) DEFAULT NULL,
+ * `compile_id` varchar(250) DEFAULT NULL,
+ * `modified` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
+ * `expire` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
+ * `content` mediumblob NOT NULL,
+ * PRIMARY KEY (`id`),
+ * KEY `name` (`name`),
+ * KEY `cache_id` (`cache_id`),
+ * KEY `compile_id` (`compile_id`),
+ * KEY `modified` (`modified`),
+ * KEY `expire` (`expire`)
+ * ) ENGINE=InnoDB
+ * Example usage :
+ * $cnx = new PDO("mysql:host=localhost;dbname=mydb", "username", "password");
+ * $smarty->setCachingType('pdo');
+ * $smarty->loadPlugin('Smarty_CacheResource_Pdo');
+ * $smarty->registerCacheResource('pdo', new Smarty_CacheResource_Pdo($cnx, 'smarty_cache'));
+ *
+ * @author Beno!t POLASZEK - 2014
+ */
+class Smarty_CacheResource_Pdo extends Smarty_CacheResource_Custom {
+
+ protected $fetchStatements = Array('default' => 'SELECT %2$s
+ FROM %1$s
+ WHERE 1
+ AND id = :id
+ AND cache_id IS NULL
+ AND compile_id IS NULL',
+
+ 'withCacheId' => 'SELECT %2$s
+ FROM %1$s
+ WHERE 1
+ AND id = :id
+ AND cache_id = :cache_id
+ AND compile_id IS NULL',
+
+ 'withCompileId' => 'SELECT %2$s
+ FROM %1$s
+ WHERE 1
+ AND id = :id
+ AND compile_id = :compile_id
+ AND cache_id IS NULL',
+
+ 'withCacheIdAndCompileId' => 'SELECT %2$s
+ FROM %1$s
+ WHERE 1
+ AND id = :id
+ AND cache_id = :cache_id
+ AND compile_id = :compile_id');
+ protected $insertStatement = 'INSERT INTO %s
+
+ SET id = :id,
+ name = :name,
+ cache_id = :cache_id,
+ compile_id = :compile_id,
+ modified = CURRENT_TIMESTAMP,
+ expire = DATE_ADD(CURRENT_TIMESTAMP, INTERVAL :expire SECOND),
+ content = :content
+
+ ON DUPLICATE KEY UPDATE
+ name = :name,
+ cache_id = :cache_id,
+ compile_id = :compile_id,
+ modified = CURRENT_TIMESTAMP,
+ expire = DATE_ADD(CURRENT_TIMESTAMP, INTERVAL :expire SECOND),
+ content = :content';
+
+ protected $deleteStatement = 'DELETE FROM %1$s WHERE %2$s';
+ protected $truncateStatement = 'TRUNCATE TABLE %s';
+
+ protected $fetchColumns = 'modified, content';
+ protected $fetchTimestampColumns = 'modified';
+
+ protected $pdo, $table, $database;
+
+ /*
+ * Constructor
+ *
+ * @param PDO $pdo PDO : active connection
+ * @param string $table : table (or view) name
+ * @param string $database : optionnal - if table is located in another db
+ */
+ public function __construct(PDO $pdo, $table, $database = null) {
+
+ if (is_null($table)) {
+ throw new SmartyException("Table name for caching can't be null");
+ }
+
+ $this->pdo = $pdo;
+ $this->table = $table;
+ $this->database = $database;
+
+ $this->fillStatementsWithTableName();
+ }
+
+ /*
+ * Fills the table name into the statements.
+ *
+ * @return Current Instance
+ * @access protected
+ */
+ protected function fillStatementsWithTableName() {
+
+ foreach ($this->fetchStatements AS &$statement) {
+ $statement = sprintf($statement, $this->getTableName(), '%s');
+ }
+
+ $this->insertStatement = sprintf($this->insertStatement, $this->getTableName());
+ $this->deleteStatement = sprintf($this->deleteStatement, $this->getTableName(), '%s');
+ $this->truncateStatement = sprintf($this->truncateStatement, $this->getTableName());
+
+ return $this;
+ }
+
+ /*
+ * Gets the fetch statement, depending on what you specify
+ *
+ * @param string $columns : the column(s) name(s) you want to retrieve from the database
+ * @param string $id unique cache content identifier
+ * @param string|null $cache_id cache id
+ * @param string|null $compile_id compile id
+ * @access protected
+ */
+ protected function getFetchStatement($columns, $id, $cache_id = null, $compile_id = null) {
+
+ if (!is_null($cache_id) && !is_null($compile_id)) {
+ $query = $this->fetchStatements['withCacheIdAndCompileId'] AND $args = Array('id' => $id, 'cache_id' => $cache_id, 'compile_id' => $compile_id);
+ } elseif (is_null($cache_id) && !is_null($compile_id)) {
+ $query = $this->fetchStatements['withCompileId'] AND $args = Array('id' => $id, 'compile_id' => $compile_id);
+ } elseif (!is_null($cache_id) && is_null($compile_id)) {
+ $query = $this->fetchStatements['withCacheId'] AND $args = Array('id' => $id, 'cache_id' => $cache_id);
+ } else {
+ $query = $this->fetchStatements['default'] AND $args = Array('id' => $id);
+ }
+
+ $query = sprintf($query, $columns);
+
+ $stmt = $this->pdo->prepare($query);
+
+ foreach ($args AS $key => $value) {
+ $stmt->bindValue($key, $value);
+ }
+
+ return $stmt;
+ }
+
+ /**
+ * fetch cached content and its modification time from data source
+ *
+ * @param string $id unique cache content identifier
+ * @param string $name template name
+ * @param string|null $cache_id cache id
+ * @param string|null $compile_id compile id
+ * @param string $content cached content
+ * @param integer $mtime cache modification timestamp (epoch)
+ *
+ * @return void
+ * @access protected
+ */
+ protected function fetch($id, $name, $cache_id = null, $compile_id = null, &$content, &$mtime) {
+
+ $stmt = $this->getFetchStatement($this->fetchColumns, $id, $cache_id, $compile_id);
+ $stmt->execute();
+ $row = $stmt->fetch();
+ $stmt->closeCursor();
+
+ if ($row) {
+ $content = $this->outputContent($row['content']);
+ $mtime = strtotime($row['modified']);
+ } else {
+ $content = null;
+ $mtime = null;
+ }
+ }
+
+ /**
+ * Fetch cached content's modification timestamp from data source
+ * {@internal 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|null $cache_id cache id
+ * @param string|null $compile_id compile id
+ *
+ * @return integer|boolean timestamp (epoch) the template was modified, or false if not found
+ * @access protected
+ */
+ // protected function fetchTimestamp($id, $name, $cache_id = null, $compile_id = null) {
+ // $stmt = $this->getFetchStatement($this->fetchTimestampColumns, $id, $cache_id, $compile_id);
+ // $stmt -> execute();
+ // $mtime = strtotime($stmt->fetchColumn());
+ // $stmt -> closeCursor();
+ // return $mtime;
+ // }
+
+ /**
+ * Save content to cache
+ *
+ * @param string $id unique cache content identifier
+ * @param string $name template name
+ * @param string|null $cache_id cache id
+ * @param string|null $compile_id compile id
+ * @param integer|null $exp_time seconds till expiration time in seconds or null
+ * @param string $content content to cache
+ *
+ * @return boolean success
+ * @access protected
+ */
+ protected function save($id, $name, $cache_id = null, $compile_id = null, $exp_time, $content) {
+
+ $stmt = $this->pdo->prepare($this->insertStatement);
+
+ $stmt->bindValue('id', $id);
+ $stmt->bindValue('name', $name);
+ $stmt->bindValue('cache_id', $cache_id, (is_null($cache_id)) ? PDO::PARAM_NULL : PDO::PARAM_STR);
+ $stmt->bindValue('compile_id', $compile_id, (is_null($compile_id)) ? PDO::PARAM_NULL : PDO::PARAM_STR);
+ $stmt->bindValue('expire', (int)$exp_time, PDO::PARAM_INT);
+ $stmt->bindValue('content', $this->inputContent($content));
+ $stmt->execute();
+
+ return !!$stmt->rowCount();
+ }
+
+ /*
+ * Encodes the content before saving to database
+ *
+ * @param string $content
+ * @return string $content
+ * @access protected
+ */
+ protected function inputContent($content) {
+ return $content;
+ }
+
+ /*
+ * Decodes the content before saving to database
+ *
+ * @param string $content
+ * @return string $content
+ * @access protected
+ */
+ protected function outputContent($content) {
+ return $content;
+ }
+
+ /**
+ * Delete content from cache
+ *
+ * @param string|null $name template name
+ * @param string|null $cache_id cache id
+ * @param string|null $compile_id compile id
+ * @param integer|null|-1 $exp_time seconds till expiration or null
+ *
+ * @return integer number of deleted caches
+ * @access protected
+ */
+ protected function delete($name = null, $cache_id = null, $compile_id = null, $exp_time = null) {
+
+ // delete the whole cache
+ if ($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
+ $this->pdo->query($this->truncateStatement);
+ return -1;
+ }
+ // build the filter
+ $where = array();
+ // equal test name
+ if ($name !== null) {
+ $where[] = 'name = ' . $this->pdo->quote($name);
+ }
+ // equal test cache_id and match sub-groups
+ if ($cache_id !== null) {
+ $where[] = '(cache_id = ' . $this->pdo->quote($cache_id)
+ . ' OR cache_id LIKE ' . $this->pdo->quote($cache_id . '|%') . ')';
+ }
+ // equal test compile_id
+ if ($compile_id !== null) {
+ $where[] = 'compile_id = ' . $this->pdo->quote($compile_id);
+ }
+ // for clearing expired caches
+ if ($exp_time === Smarty::CLEAR_EXPIRED) {
+ $where[] = 'expire < CURRENT_TIMESTAMP';
+ } // range test expiration time
+ elseif ($exp_time !== null) {
+ $where[] = 'modified < DATE_SUB(NOW(), INTERVAL ' . intval($exp_time) . ' SECOND)';
+ }
+ // run delete query
+ $query = $this->pdo->query(sprintf($this->deleteStatement, join(' AND ', $where)));
+ return $query->rowCount();
+ }
+
+ /**
+ * Gets the formatted table name
+ *
+ * @return string
+ * @access protected
+ */
+ protected function getTableName() {
+ return (is_null($this->database)) ? "`{$this->table}`" : "`{$this->database}`.`{$this->table}`";
+ }
+}
+
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