src/Core/PConfig/JitPConfig.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Core\PConfig;
  23
  24 use Friendica\Core\BasePConfig;
  25 use Friendica\Model;
  26
  27 /**
  28  * This class implements the Just-In-Time configuration, which will cache
  29  * user config values in a cache, once they are retrieved.
  30  *
  31  * Default Configuration type.
  32  * Provides the best performance for pages loading few configuration variables.
  33  */
  34 class JitPConfig extends BasePConfig
  35 {
  36         /**
  37          * @var array Array of already loaded db values (even if there was no value)
  38          */
  39         private $db_loaded;
  40
  41         /**
  42          * @param Cache                $configCache The configuration cache
  43          * @param Model\Config\PConfig $configModel The configuration model
  44          */
  45         public function __construct(Cache $configCache, Model\Config\PConfig $configModel)
  46         {
  47                 parent::__construct($configCache, $configModel);
  48                 $this->db_loaded = [];
  49         }
  50
  51         /**
  52          * {@inheritDoc}
  53          *
  54          */
  55         public function load(int $uid, string $cat = 'config')
  56         {
  57                 // If not connected or no uid, do nothing
  58                 if (!$uid || !$this->configModel->isConnected()) {
  59                         return;
  60                 }
  61
  62                 $config = $this->configModel->load($uid, $cat);
  63
  64                 if (!empty($config[$cat])) {
  65                         foreach ($config[$cat] as $key => $value) {
  66                                 $this->db_loaded[$uid][$cat][$key] = true;
  67                         }
  68                 }
  69
  70                 // load the whole category out of the DB into the cache
  71                 $this->configCache->load($uid, $config);
  72         }
  73
  74         /**
  75          * {@inheritDoc}
  76          */
  77         public function get(int $uid, string $cat, string $key, $default_value = null, bool $refresh = false)
  78         {
  79                 if (!$uid) {
  80                         return $default_value;
  81                 }
  82
  83                 // if the value isn't loaded or refresh is needed, load it to the cache
  84                 if ($this->configModel->isConnected() &&
  85                     (empty($this->db_loaded[$uid][$cat][$key]) ||
  86                      $refresh)) {
  87
  88                         $dbvalue = $this->configModel->get($uid, $cat, $key);
  89
  90                         if (isset($dbvalue)) {
  91                                 $this->configCache->set($uid, $cat, $key, $dbvalue);
  92                                 unset($dbvalue);
  93                         }
  94
  95                         $this->db_loaded[$uid][$cat][$key] = true;
  96                 }
  97
  98                 // use the config cache for return
  99                 $result = $this->configCache->get($uid, $cat, $key);
 100
 101                 return (isset($result)) ? $result : $default_value;
 102         }
 103
 104         /**
 105          * {@inheritDoc}
 106          */
 107         public function set(int $uid, string $cat, string $key, $value)
 108         {
 109                 if (!$uid) {
 110                         return false;
 111                 }
 112
 113                 // set the cache first
 114                 $cached = $this->configCache->set($uid, $cat, $key, $value);
 115
 116                 // If there is no connected adapter, we're finished
 117                 if (!$this->configModel->isConnected()) {
 118                         return $cached;
 119                 }
 120
 121                 $stored = $this->configModel->set($uid, $cat, $key, $value);
 122
 123                 $this->db_loaded[$uid][$cat][$key] = $stored;
 124
 125                 return $cached && $stored;
 126         }
 127
 128         /**
 129          * {@inheritDoc}
 130          */
 131         public function delete(int $uid, string $cat, string $key)
 132         {
 133                 if (!$uid) {
 134                         return false;
 135                 }
 136
 137                 $cacheRemoved = $this->configCache->delete($uid, $cat, $key);
 138
 139                 if (isset($this->db_loaded[$uid][$cat][$key])) {
 140                         unset($this->db_loaded[$uid][$cat][$key]);
 141                 }
 142
 143                 if (!$this->configModel->isConnected()) {
 144                         return $cacheRemoved;
 145                 }
 146
 147                 $storeRemoved = $this->configModel->delete($uid, $cat, $key);
 148
 149                 return $cacheRemoved || $storeRemoved;
 150         }
 151 }