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
  38                         $return[$key] = $config['v'];
  39                         $this->in_db[$cat][$key] = true;
  40                 }
  41                 DBA::close($configs);
  42
  43                 return [$cat => $config];
  44         }
  45
  46         /**
  47          * {@inheritdoc}
  48          */
  49         public function get($cat, $key)
  50         {
  51                 if (!$this->isConnected()) {
  52                         return '!<unset>!';
  53                 }
  54
  55                 $config = DBA::selectFirst('config', ['v'], ['cat' => $cat, 'k' => $key]);
  56                 if (DBA::isResult($config)) {
  57                         // manage array value
  58                         $value = (preg_match("|^a:[0-9]+:{.*}$|s", $config['v']) ? unserialize($config['v']) : $config['v']);
  59
  60                         if (isset($value) && $value !== '') {
  61                                 $this->in_db[$cat][$key] = true;
  62                                 return $value;
  63                         }
  64                 }
  65
  66                 $this->in_db[$cat][$key] = false;
  67                 return '!<unset>!';
  68         }
  69
  70         /**
  71          * {@inheritdoc}
  72          */
  73         public function set($cat, $key, $value)
  74         {
  75                 if (!$this->isConnected()) {
  76                         return false;
  77                 }
  78
  79                 // We store our setting values in a string variable.
  80                 // So we have to do the conversion here so that the compare below works.
  81                 // The exception are array values.
  82                 $dbvalue = (!is_array($value) ? (string)$value : $value);
  83
  84                 $stored = $this->get($cat, $key);
  85
  86                 if (!isset($this->in_db[$cat])) {
  87                         $this->in_db[$cat] = [];
  88                 }
  89                 if (!isset($this->in_db[$cat][$key])) {
  90                         $this->in_db[$cat][$key] = false;
  91                 }
  92
  93                 if (($stored === $dbvalue) && $this->in_db[$cat][$key]) {
  94                         return true;
  95                 }
  96
  97                 // manage array value
  98                 $dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
  99
 100                 $result = DBA::update('config', ['v' => $dbvalue], ['cat' => $cat, 'k' => $key], true);
 101
 102                 $this->in_db[$cat][$key] = $result;
 103
 104                 return $result;
 105         }
 106
 107         /**
 108          * {@inheritdoc}
 109          */
 110         public function delete($cat, $key)
 111         {
 112                 if (!$this->isConnected()) {
 113                         return false;
 114                 }
 115
 116                 if (isset($this->cache[$cat][$key])) {
 117                         unset($this->in_db[$cat][$key]);
 118                 }
 119
 120                 $result = DBA::delete('config', ['cat' => $cat, 'k' => $key]);
 121
 122                 return $result;
 123         }
 124
 125         /**
 126          * {@inheritdoc}
 127          */
 128         public function isLoaded($cat, $key)
 129         {
 130                 if (!$this->isConnected()) {
 131                         return false;
 132                 }
 133
 134                 return (isset($this->in_db[$cat][$key])) && $this->in_db[$cat][$key];
 135         }
 136 }