src/Core/Config/Adapter/PreloadConfigAdapter.php

   1 <?php
   2
   3 namespace Friendica\Core\Config\Adapter;
   4
   5 use Friendica\Database\DBA;
   6
   7 /**
   8  * Preload Configuration Adapter
   9  *
  10  * Minimizes the number of database queries to retrieve configuration values at the cost of memory.
  11  *
  12  * @author Hypolite Petovan <hypolite@mrpetovan.com>
  13  */
  14 class PreloadConfigAdapter extends AbstractDbaConfigAdapter implements IConfigAdapter
  15 {
  16         private $config_loaded = false;
  17
  18         /**
  19          * {@inheritdoc}
  20          */
  21         public function load($cat = 'config')
  22         {
  23                 $return = [];
  24
  25                 if (!$this->isConnected()) {
  26                         return $return;
  27                 }
  28
  29                 if ($this->config_loaded) {
  30                         return $return;
  31                 }
  32
  33                 $configs = DBA::select('config', ['cat', 'v', 'k']);
  34                 while ($config = DBA::fetch($configs)) {
  35                         $value = $config['v'];
  36                         if (isset($value) && $value !== '') {
  37                                 $return[$config['cat']][$config['k']] = $value;
  38                         } else {
  39                                 $return[$config['cat']][$config['k']] = '!<unset>!';
  40                         }
  41                 }
  42                 DBA::close($configs);
  43
  44                 $this->config_loaded = true;
  45
  46                 return $return;
  47         }
  48
  49         /**
  50          * {@inheritdoc}
  51          */
  52         public function get($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                                 return $value;
  65                         }
  66                 }
  67
  68                 return '!<unset>!';
  69         }
  70
  71         /**
  72          * {@inheritdoc}
  73          */
  74         public function set($cat, $key, $value)
  75         {
  76                 if (!$this->isConnected()) {
  77                         return false;
  78                 }
  79
  80                 // We store our setting values as strings.
  81                 // So we have to do the conversion here so that the compare below works.
  82                 // The exception are array values.
  83                 $compare_value = !is_array($value) ? (string)$value : $value;
  84
  85                 if ($this->get($cat, $key) === $compare_value) {
  86                         return true;
  87                 }
  88
  89                 // manage array value
  90                 $dbvalue = is_array($value) ? serialize($value) : $value;
  91
  92                 $result = DBA::update('config', ['v' => $dbvalue], ['cat' => $cat, 'k' => $key], true);
  93
  94                 return $result;
  95         }
  96
  97         /**
  98          * {@inheritdoc}
  99          */
 100         public function delete($cat, $key)
 101         {
 102                 if (!$this->isConnected()) {
 103                         return false;
 104                 }
 105
 106                 $result = DBA::delete('config', ['cat' => $cat, 'k' => $key]);
 107
 108                 return $result;
 109         }
 110
 111         /**
 112          * {@inheritdoc}
 113          */
 114         public function isLoaded($cat, $key)
 115         {
 116                 if (!$this->isConnected()) {
 117                         return false;
 118                 }
 119
 120                 return $this->config_loaded;
 121         }
 122 }