src/Core/Config/Adapter/JITPConfigAdapter.php

   1 <?php
   2 namespace Friendica\Core\Config\Adapter;
   3
   4 use Friendica\Database\DBA;
   5
   6 /**
   7  * JustInTime User Configuration Adapter
   8  *
   9  * Default PConfig Adapter. Provides the best performance for pages loading few configuration variables.
  10  *
  11  * @author Hypolite Petovan <hypolite@mrpetovan.com>
  12  */
  13 class JITPConfigAdapter extends AbstractDbaConfigAdapter implements IPConfigAdapter
  14 {
  15         private $in_db;
  16
  17         /**
  18          * {@inheritdoc}
  19          */
  20         public function load($uid, $cat)
  21         {
  22                 $return = [];
  23
  24                 if (!$this->isConnected()) {
  25                         return $return;
  26                 }
  27
  28                 $pconfigs = DBA::select('pconfig', ['v', 'k'], ['cat' => $cat, 'uid' => $uid]);
  29                 if (DBA::isResult($pconfigs)) {
  30                         while ($pconfig = DBA::fetch($pconfigs)) {
  31                                 $key = $pconfig['k'];
  32                                 $value = $pconfig['v'];
  33
  34                                 if (isset($value) && $value !== '') {
  35                                         $return[$key] = $value;
  36                                         $this->in_db[$uid][$cat][$key] = true;
  37                                 }
  38                         }
  39                 } else if ($cat != 'config') {
  40                         // Negative caching
  41                         $return = "!<unset>!";
  42                 }
  43                 DBA::close($pconfigs);
  44
  45                 return [$cat => $return];
  46         }
  47
  48         /**
  49          * {@inheritdoc}
  50          */
  51         public function get($uid, $cat, $key)
  52         {
  53                 if (!$this->isConnected()) {
  54                         return '!<unset>!';
  55                 }
  56
  57                 $pconfig = DBA::selectFirst('pconfig', ['v'], ['uid' => $uid, 'cat' => $cat, 'k' => $key]);
  58                 if (DBA::isResult($pconfig)) {
  59                         // manage array value
  60                         $value = (preg_match("|^a:[0-9]+:{.*}$|s", $pconfig['v']) ? unserialize($pconfig['v']) : $pconfig['v']);
  61
  62                         if (isset($value) && $value !== '') {
  63                                 $this->in_db[$uid][$cat][$key] = true;
  64                                 return $value;
  65                         }
  66                 }
  67
  68                 $this->in_db[$uid][$cat][$key] = false;
  69                 return '!<unset>!';
  70         }
  71
  72         /**
  73          * {@inheritdoc}
  74          */
  75         public function set($uid, $cat, $key, $value)
  76         {
  77                 if (!$this->isConnected()) {
  78                         return false;
  79                 }
  80
  81                 // We store our setting values in a string variable.
  82                 // So we have to do the conversion here so that the compare below works.
  83                 // The exception are array values.
  84                 $dbvalue = (!is_array($value) ? (string)$value : $value);
  85
  86                 $stored = $this->get($uid, $cat, $key);
  87
  88                 if (!isset($this->in_db[$uid])) {
  89                         $this->in_db[$uid] = [];
  90                 }
  91                 if (!isset($this->in_db[$uid][$cat])) {
  92                         $this->in_db[$uid][$cat] = [];
  93                 }
  94                 if (!isset($this->in_db[$uid][$cat][$key])) {
  95                         $this->in_db[$uid][$cat][$key] = false;
  96                 }
  97
  98                 if (($stored === $dbvalue) && $this->in_db[$uid][$cat][$key]) {
  99                         return true;
 100                 }
 101
 102                 // manage array value
 103                 $dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
 104
 105                 $result = DBA::update('pconfig', ['v' => $dbvalue], ['uid' => $uid, 'cat' => $cat, 'k' => $key], true);
 106
 107                 $this->in_db[$uid][$cat][$key] = $result;
 108
 109                 return $result;
 110         }
 111
 112         /**
 113          * {@inheritdoc}
 114          */
 115         public function delete($uid, $cat, $key)
 116         {
 117                 if (!$this->isConnected()) {
 118                         return false;
 119                 }
 120
 121                 if (!empty($this->in_db[$uid][$cat][$key])) {
 122                         unset($this->in_db[$uid][$cat][$key]);
 123                 }
 124
 125                 $result = DBA::delete('pconfig', ['uid' => $uid, 'cat' => $cat, 'k' => $key]);
 126
 127                 return $result;
 128         }
 129
 130         /**
 131          * {@inheritdoc}
 132          */
 133         public function isLoaded($uid, $cat, $key)
 134         {
 135                 if (!$this->isConnected()) {
 136                         return false;
 137                 }
 138
 139                 return (isset($this->in_db[$uid][$cat][$key])) && $this->in_db[$uid][$cat][$key];
 140         }
 141 }