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<?php |
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/* |
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You may not change or alter any portion of this comment or credits |
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of supporting developers from this source code or any supporting source code |
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which is considered copyrighted (c) material of the original comment or credit authors. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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*/ |
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namespace Xmf\Module\Helper; |
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/** |
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* Manage cache interaction in a module. Cache key will be prefixed |
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* with the module name to segregate it from keys set by other modules |
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* or system functions. Cache data is by definition serialized, so |
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* any arbitrary data (i.e. array, object) can be stored. |
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* |
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* @category Xmf\Module\Helper\Cache |
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* @package Xmf |
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* @author trabis <[email protected]> |
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* @author Richard Griffith <[email protected]> |
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* @copyright 2011-2018 XOOPS Project (https://xoops.org) |
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* @license GNU GPL 2 or later (http://www.gnu.org/licenses/gpl-2.0.html) |
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* @link https://xoops.org |
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*/ |
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class Cache extends AbstractHelper |
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{ |
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/** |
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* @var string |
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*/ |
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protected $prefix; |
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/** |
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* @var XoopsCache |
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*/ |
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protected $cache; |
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/** |
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* Initialize parent::__construct calls this after verifying module object. |
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* |
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* @return void |
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*/ |
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public function init() |
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{ |
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\XoopsLoad::load('xoopscache'); |
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$this->prefix = $this->module->getVar('dirname') . '_'; |
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$this->cache = \XoopsCache::getInstance(); |
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} |
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/** |
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* Add our module prefix to a name |
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* |
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* @param string $name name to prefix |
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* |
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* @return string module prefixed name |
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*/ |
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protected function prefix($name) |
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{ |
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return $this->prefix . $name; |
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} |
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/** |
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* Write a value for a key to the cache |
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* |
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* @param string $key Identifier for the data |
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* @param mixed $value Data to be cached - anything except a resource |
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* @param int|null $ttl Time to live in seconds |
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* |
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* @return bool True if the data was successfully cached, false on failure |
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*/ |
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public function write($key, $value, $ttl = null) |
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{ |
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return $this->cache->write($this->prefix($key), $value, $ttl); |
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} |
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/** |
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* Read value for a key from the cache |
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* |
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* @param string $key Identifier for the data |
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* @param mixed $default default value to return if config $key is not set |
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* |
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* @return mixed value if key was set, false not set or expired |
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*/ |
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public function read($key, $default = false) |
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{ |
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$value = $this->cache->read($this->prefix($key)); |
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return (false !== $value) ? $value : $default; |
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} |
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/** |
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* Delete a key from the cache |
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* |
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* @param string $key Identifier for the data |
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* |
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* @return void |
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*/ |
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public function delete($key) |
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{ |
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$this->cache->delete($this->prefix($key)); |
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} |
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/** |
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* cache block wrapper |
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* |
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* If the cache read for $key is a miss, call the $regenFunction to update it. |
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* |
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* @param string $key Identifier for the cache item |
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* @param callable $regenFunction function to generate cached content |
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* @param int|null $ttl time to live, number of seconds as integer |
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* or null for default |
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* @param mixed $args variable argument list for $regenFunction |
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* |
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* @return mixed |
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*/ |
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public function cacheRead($key, $regenFunction, $ttl = null, $args = null) |
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{ |
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if (null === $args) { |
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$varArgs = array(); |
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} else { |
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$varArgs = func_get_args(); |
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array_shift($varArgs); // pull off $key |
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array_shift($varArgs); // pull off $regenFunction |
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array_shift($varArgs); // pull off $ttl |
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} |
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$cachedContent = $this->read($key); |
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// Check to see if the cache missed, which could mean that it either didn't exist or was stale. |
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if ($cachedContent === false) { |
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// Run the relatively expensive code. |
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$cachedContent = call_user_func_array($regenFunction, $varArgs); |
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// save result |
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$this->write($key, $cachedContent, $ttl); |
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} |
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return $cachedContent; |
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} |
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} |
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mambax7 /
XoopsCore25
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