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<?php |
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/** |
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* @package CleverStyle CMS |
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* @author Nazar Mokrynskyi <[email protected]> |
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* @copyright Copyright (c) 2016, Nazar Mokrynskyi |
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* @license MIT License, see license.txt |
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*/ |
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namespace cs\Cache; |
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use |
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cs\Core; |
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/** |
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* Abstract class that simplifies creating cache engines without namespaces support |
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* |
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* This class implements methods: |
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* * `::get()` |
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* * `::set()` |
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* * `::del()` |
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* * `::clean()` |
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* |
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* And requires to implement simple low-level `protected` proxy-methods: |
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* * `::available_internal()` |
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* * `::get_internal()` |
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* * `::set_internal()` |
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* * `::del_internal()` |
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* * `::clean_internal()` |
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* * `::increment_internal()` |
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* |
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* The main benefit is that namespace support is provided by this class and target class only needs to implement trivial low-level methods |
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*/ |
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abstract class _Abstract_with_namespace extends _Abstract { |
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/** |
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* @var array |
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*/ |
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protected $root_versions_cache = []; |
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/** |
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* Whether current cache engine is available (might be `false` if necessary extension is not installed or something similar) |
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* |
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* @return bool |
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*/ |
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abstract protected function available_internal (); |
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/** |
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* @abstract |
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* |
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* @param string $item |
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* |
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* @return bool|mixed |
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*/ |
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abstract protected function get_internal ($item); |
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/** |
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* @abstract |
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* |
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* @param string $item |
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* @param mixed $data |
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* |
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* @return bool |
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*/ |
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abstract protected function set_internal ($item, $data); |
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/** |
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* @abstract |
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* |
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* @param string $item |
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* |
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* @return bool |
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*/ |
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abstract protected function del_internal ($item); |
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/** |
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* @abstract |
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* |
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* @param string $item |
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* |
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* @return bool |
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*/ |
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abstract protected function increment_internal ($item); |
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/** |
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* @abstract |
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* |
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* @return bool |
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*/ |
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abstract protected function clean_internal (); |
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/** |
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* @inheritdoc |
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*/ |
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function get ($item) { |
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if (!$this->available_internal()) { |
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return false; |
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} |
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return $this->get_internal( |
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$this->namespaces_imitation($item) |
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); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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function set ($item, $data) { |
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if (!$this->available_internal()) { |
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return false; |
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} |
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return $this->set_internal( |
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$this->namespaces_imitation($item), |
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$data |
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); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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function del ($item) { |
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if (!$this->available_internal()) { |
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return false; |
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} |
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$domain = $this->domain(); |
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$this->del_internal($this->namespaces_imitation($item)); |
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$this->increment_internal("/$domain/$item"); |
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unset($this->root_versions_cache["/$domain/$item"]); |
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return true; |
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} |
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/** |
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* @return string |
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*/ |
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protected function domain () { |
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static $domain; |
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if (!isset($domain)) { |
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$domain = Core::instance()->domain; |
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} |
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return $domain; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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function clean () { |
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if (!$this->available_internal()) { |
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return false; |
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} |
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return $this->clean_internal(); |
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} |
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/** |
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* Namespaces imitation |
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* |
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* Accepts item as parameter, returns item string that uses namespaces (needed for fast deletion of large branches of cache elements). |
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* |
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* @param $item |
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* |
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* @return string |
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*/ |
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protected function namespaces_imitation ($item) { |
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$domain = $this->domain(); |
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$exploded = explode('/', $item); |
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$count = count($exploded); |
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if ($count > 1) { |
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$item_path = $domain; |
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--$count; |
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/** @noinspection ForeachInvariantsInspection */ |
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for ($i = 0; $i < $count; ++$i) { |
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$item_path .= '/'.$exploded[$i]; |
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if (!$i && isset($this->root_versions_cache["/$item_path"])) { |
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$exploded[$i] .= '/'.$this->root_versions_cache["/$item_path"]; |
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continue; |
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} |
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$version = $this->get_internal("/$item_path"); |
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if ($version === false) { |
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$this->set_internal("/$item_path", 0); |
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$version = 0; |
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} |
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$exploded[$i] .= "/$version"; |
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if (!$i) { |
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$this->root_versions_cache["/$item_path"] = $version; |
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} |
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} |
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return "$domain/".implode('/', $exploded); |
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} |
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return "$domain/$item"; |
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} |
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} |
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nazar-pc /
CleverStyle-Framework
