diff options
Diffstat (limited to 'system/libraries/Cache/drivers/Cache_file.php')
| -rw-r--r-- | system/libraries/Cache/drivers/Cache_file.php | 110 |
1 files changed, 87 insertions, 23 deletions
diff --git a/system/libraries/Cache/drivers/Cache_file.php b/system/libraries/Cache/drivers/Cache_file.php index 769bd5a26..c6aa848fe 100644 --- a/system/libraries/Cache/drivers/Cache_file.php +++ b/system/libraries/Cache/drivers/Cache_file.php @@ -18,7 +18,7 @@ * * @package CodeIgniter * @author EllisLab Dev Team - * @copyright Copyright (c) 2008 - 2013, EllisLab, Inc. (http://ellislab.com/) + * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/) * @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0) * @link http://codeigniter.com * @since Version 2.0 @@ -62,25 +62,13 @@ class CI_Cache_file extends CI_Driver { /** * Fetch from cache * - * @param mixed unique key id - * @return mixed data on success/false on failure + * @param string $id Cache ID + * @return mixed Data on success, FALSE on failure */ public function get($id) { - if ( ! file_exists($this->_cache_path.$id)) - { - return FALSE; - } - - $data = unserialize(file_get_contents($this->_cache_path.$id)); - - if ($data['ttl'] > 0 && time() > $data['time'] + $data['ttl']) - { - unlink($this->_cache_path.$id); - return FALSE; - } - - return $data['data']; + $data = $this->_get($id); + return is_array($data) ? $data['data'] : FALSE; } // ------------------------------------------------------------------------ @@ -88,13 +76,13 @@ class CI_Cache_file extends CI_Driver { /** * Save into cache * - * @param string unique key - * @param mixed data to store - * @param int length of time (in seconds) the cache is valid - * - Default is 60 seconds - * @return bool true on success/false on failure + * @param string $id Cache ID + * @param mixed $data Data to store + * @param int $ttl Time to live in seconds + * @param bool $raw Whether to store the raw value (unused) + * @return bool TRUE on success, FALSE on failure */ - public function save($id, $data, $ttl = 60) + public function save($id, $data, $ttl = 60, $raw = FALSE) { $contents = array( 'time' => time(), @@ -127,6 +115,54 @@ class CI_Cache_file extends CI_Driver { // ------------------------------------------------------------------------ /** + * Increment a raw value + * + * @param string $id Cache ID + * @param int $offset Step/value to add + * @return New value on success, FALSE on failure + */ + public function increment($id, $offset = 1) + { + $data = $this->_get($id); + + if ($data === FALSE OR ! is_int($data['data'])) + { + return FALSE; + } + + $new_value = $data['data'] + $offset; + return $this->save($id, $new_value, $data['ttl']) + ? $new_value + : FALSE; + } + + // ------------------------------------------------------------------------ + + /** + * Decrement a raw value + * + * @param string $id Cache ID + * @param int $offset Step/value to reduce by + * @return New value on success, FALSE on failure + */ + public function decrement($id, $offset = 1) + { + $data = $this->_get($id); + + if ($data === FALSE OR ! is_int($data['data'])) + { + return FALSE; + } + + $new_value = $data['data'] - $offset; + return $this->save($id, $new_value, $data['ttl']) + ? $new_value + : FALSE; + } + + // ------------------------------------------------------------------------ + + /** * Clean the Cache * * @return bool false on failure/true on success @@ -200,6 +236,34 @@ class CI_Cache_file extends CI_Driver { return is_really_writable($this->_cache_path); } + // ------------------------------------------------------------------------ + + /** + * Get all data + * + * Internal method to get all the relevant data about a cache item + * + * @param string $id Cache ID + * @return mixed Data array on success or FALSE on failure + */ + protected function _get($id) + { + if ( ! file_exists($this->_cache_path.$id)) + { + return FALSE; + } + + $data = unserialize(file_get_contents($this->_cache_path.$id)); + + if ($data['ttl'] > 0 && time() > $data['time'] + $data['ttl']) + { + unlink($this->_cache_path.$id); + return FALSE; + } + + return $data; + } + } /* End of file Cache_file.php */ |