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                         $this->in_db[$cat][$key] = true;
  61                         return $value;
  62                 } else {
  63
  64                         $this->in_db[$cat][$key] = false;
  65                         return '!<unset>!';
  66                 }
  67         }
  68
  69         /**
  70          * {@inheritdoc}
  71          */
  72         public function set($cat, $key, $value)
  73         {
  74                 if (!$this->isConnected()) {
  75                         return false;
  76                 }
  77
  78                 // We store our setting values in a string variable.
  79                 // So we have to do the conversion here so that the compare below works.
  80                 // The exception are array values.
  81                 $dbvalue = (!is_array($value) ? (string)$value : $value);
  82
  83                 $stored = $this->get($cat, $key);
  84
  85                 if (!isset($this->in_db[$cat])) {
  86                         $this->in_db[$cat] = [];
  87                 }
  88                 if (!isset($this->in_db[$cat][$key])) {
  89                         $this->in_db[$cat][$key] = false;
  90                 }
  91
  92                 if (($stored === $dbvalue) && $this->in_db[$cat][$key]) {
  93                         return true;
  94                 }
  95
  96                 // manage array value
  97                 $dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
  98
  99                 $result = DBA::update('config', ['v' => $dbvalue], ['cat' => $cat, 'k' => $key], true);
 100
 101                 $this->in_db[$cat][$key] = $result;
 102
 103                 return $result;
 104         }
 105
 106         /**
 107          * {@inheritdoc}
 108          */
 109         public function delete($cat, $key)
 110         {
 111                 if (!$this->isConnected()) {
 112                         return false;
 113                 }
 114
 115                 if (isset($this->cache[$cat][$key])) {
 116                         unset($this->in_db[$cat][$key]);
 117                 }
 118
 119                 $result = DBA::delete('config', ['cat' => $cat, 'k' => $key]);
 120
 121                 return $result;
 122         }
 123 }