src/Core/Config/Adapter/JITConfigAdapter.php

   1 <?php
   2 namespace Friendica\Core\Config\Adapter;
   3
   4 use Friendica\Database\DBA;
   5
   6 /**
   7  * JustInTime Configuration Adapter
   8  *
   9  * Default Config Adapter. Provides the best performance for pages loading few configuration variables.
  10  *
  11  * @author Hypolite Petovan <hypolite@mrpetovan.com>
  12  */
  13 class JITConfigAdapter extends AbstractDbaConfigAdapter implements IConfigAdapter
  14 {
  15         private $in_db;
  16
  17         /**
  18          * {@inheritdoc}
  19          */
  20         public function load($cat = "config")
  21         {
  22                 $return = [];
  23
  24                 if (!$this->isConnected()) {
  25                         return $return;
  26                 }
  27
  28                 // We don't preload "system" anymore.
  29                 // This reduces the number of database reads a lot.
  30                 if ($cat === 'system') {
  31                         return $return;
  32                 }
  33
  34                 $configs = DBA::select('config', ['v', 'k'], ['cat' => $cat]);
  35                 while ($config = DBA::fetch($configs)) {
  36                         $key   = $config['k'];
  37                         $value = $config['v'];
  38
  39                         if (isset($value) && $value !== '') {
  40                                 $return[$key] = $value;
  41                                 $this->in_db[$cat][$key] = true;
  42                         }
  43                 }
  44                 DBA::close($configs);
  45
  46                 return [$cat => $config];
  47         }
  48
  49         /**
  50          * {@inheritdoc}
  51          */
  52         public function get($cat, $key)
  53         {
  54                 if (!$this->isConnected()) {
  55                         return '!<unset>!';
  56                 }
  57
  58                 $config = DBA::selectFirst('config', ['v'], ['cat' => $cat, 'k' => $key]);
  59                 if (DBA::isResult($config)) {
  60                         // manage array value
  61                         $value = (preg_match("|^a:[0-9]+:{.*}$|s", $config['v']) ? unserialize($config['v']) : $config['v']);
  62
  63                         if (isset($value) && $value !== '') {
  64                                 $this->in_db[$cat][$key] = true;
  65                                 return $value;
  66                         }
  67                 }
  68
  69                 $this->in_db[$cat][$key] = false;
  70                 return '!<unset>!';
  71         }
  72
  73         /**
  74          * {@inheritdoc}
  75          */
  76         public function set($cat, $key, $value)
  77         {
  78                 if (!$this->isConnected()) {
  79                         return false;
  80                 }
  81
  82                 // We store our setting values in a string variable.
  83                 // So we have to do the conversion here so that the compare below works.
  84                 // The exception are array values.
  85                 $dbvalue = (!is_array($value) ? (string)$value : $value);
  86
  87                 $stored = $this->get($cat, $key);
  88
  89                 if (!isset($this->in_db[$cat])) {
  90                         $this->in_db[$cat] = [];
  91                 }
  92                 if (!isset($this->in_db[$cat][$key])) {
  93                         $this->in_db[$cat][$key] = false;
  94                 }
  95
  96                 if (($stored === $dbvalue) && $this->in_db[$cat][$key]) {
  97                         return true;
  98                 }
  99
 100                 // manage array value
 101                 $dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
 102
 103                 $result = DBA::update('config', ['v' => $dbvalue], ['cat' => $cat, 'k' => $key], true);
 104
 105                 $this->in_db[$cat][$key] = $result;
 106
 107                 return $result;
 108         }
 109
 110         /**
 111          * {@inheritdoc}
 112          */
 113         public function delete($cat, $key)
 114         {
 115                 if (!$this->isConnected()) {
 116                         return false;
 117                 }
 118
 119                 if (isset($this->cache[$cat][$key])) {
 120                         unset($this->in_db[$cat][$key]);
 121                 }
 122
 123                 $result = DBA::delete('config', ['cat' => $cat, 'k' => $key]);
 124
 125                 return $result;
 126         }
 127
 128         /**
 129          * {@inheritdoc}
 130          */
 131         public function isLoaded($cat, $key)
 132         {
 133                 if (!$this->isConnected()) {
 134                         return false;
 135                 }
 136
 137                 return (isset($this->in_db[$cat][$key])) && $this->in_db[$cat][$key];
 138         }
 139 }