mirror of
https://github.com/Yetangitu/ampache
synced 2025-10-03 01:39:28 +02:00
2bb142eeb8
Fix coding guidelines incoherences. Code should match PSR1/2 now, and php-cs is set to check it on each commit. Also fixed the Git hook to take into account only added, modified, copied and renamed files (preventing errors when trying to check deleted files). Closes #1260.
141 lines
4 KiB
PHP
141 lines
4 KiB
PHP
<?php
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/* vim:set softtabstop=4 shiftwidth=4 expandtab: */
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/**
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*
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* LICENSE: GNU Affero General Public License, version 3 (AGPLv3)
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* Copyright 2001 - 2015 Ampache.org
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* database_object
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*
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* This is a general object that is extended by all of the basic
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* database based objects in ampache. It attempts to do some standard
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* caching for all of the objects to cut down on the database calls
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*
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*/
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abstract class database_object
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{
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private static $object_cache = array();
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// Statistics for debugging
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public static $cache_hit = 0;
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private static $_enabled = false;
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/**
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* get_info
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* retrieves the info from the database and puts it in the cache
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*/
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public function get_info($id, $table_name='')
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{
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$table_name = $table_name ? Dba::escape($table_name) : Dba::escape(strtolower(get_class($this)));
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// Make sure we've got a real id
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if (!is_numeric($id)) {
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return array();
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}
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if (self::is_cached($table_name, $id)) {
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return self::get_from_cache($table_name, $id);
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}
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$sql = "SELECT * FROM `$table_name` WHERE `id`='$id'";
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$db_results = Dba::read($sql);
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if (!$db_results) {
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return array();
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}
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$row = Dba::fetch_assoc($db_results);
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self::add_to_cache($table_name, $id, $row);
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return $row;
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} // get_info
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/**
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* clear_cache
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*/
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public static function clear_cache()
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{
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self::$object_cache = array();
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}
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/**
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* is_cached
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* this checks the cache to see if the specified object is there
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*/
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public static function is_cached($index, $id)
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{
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// Make sure we've got some parents here before we dive below
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if (!isset(self::$object_cache[$index])) {
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return false;
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}
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return isset(self::$object_cache[$index][$id]);
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} // is_cached
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/**
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* get_from_cache
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* This attempts to retrieve the specified object from the cache we've got here
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*/
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public static function get_from_cache($index, $id)
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{
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// Check if the object is set
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if (isset(self::$object_cache[$index]) && isset(self::$object_cache[$index][$id])) {
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self::$cache_hit++;
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return self::$object_cache[$index][$id];
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}
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return false;
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} // get_from_cache
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/**
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* add_to_cache
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* This adds the specified object to the specified index in the cache
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*/
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public static function add_to_cache($index, $id, $data)
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{
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if (!self::$_enabled) {
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return false;
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}
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$value = is_null($data) ? false : $data;
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self::$object_cache[$index][$id] = $value;
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} // add_to_cache
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/**
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* remove_from_cache
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* This function clears something from the cache, there are a few places we need to do this
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* in order to have things display correctly
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*/
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public static function remove_from_cache($index, $id)
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{
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if (isset(self::$object_cache[$index]) && isset(self::$object_cache[$index][$id])) {
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unset(self::$object_cache[$index][$id]);
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}
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} // remove_from_cache
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/**
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* _auto_init
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* Load in the cache settings once so we can avoid function calls
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*/
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public static function _auto_init()
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{
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self::$_enabled = AmpConfig::get('memory_cache');
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} // _auto_init
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} // end database_object
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