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
  33                                 $return[$key] = $pconfig['v'];
  34
  35                                 $this->in_db[$uid][$cat][$key] = true;
  36                         }
  37                 } else if ($cat != 'config') {
  38                         // Negative caching
  39                         $return = "!<unset>!";
  40                 }
  41                 DBA::close($pconfigs);
  42
  43                 return [$cat => $return];
  44         }
  45
  46         /**
  47          * {@inheritdoc}
  48          */
  49         public function get($uid, $cat, $key)
  50         {
  51                 if (!$this->isConnected()) {
  52                         return '!<unset>!';
  53                 }
  54
  55                 $pconfig = DBA::selectFirst('pconfig', ['v'], ['uid' => $uid, 'cat' => $cat, 'k' => $key]);
  56                 if (DBA::isResult($pconfig)) {
  57                         // manage array value
  58                         $value = (preg_match("|^a:[0-9]+:{.*}$|s", $pconfig['v']) ? unserialize($pconfig['v']) : $pconfig['v']);
  59
  60                         if (isset($value) && $value !== '') {
  61                                 $this->in_db[$uid][$cat][$key] = true;
  62                                 return $value;
  63                         }
  64                 }
  65
  66                 $this->in_db[$uid][$cat][$key] = false;
  67                 return '!<unset>!';
  68         }
  69
  70         /**
  71          * {@inheritdoc}
  72          */
  73         public function set($uid, $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 = $this->get($uid, $cat, $key);
  85
  86                 if (!isset($this->in_db[$uid])) {
  87                         $this->in_db[$uid] = [];
  88                 }
  89                 if (!isset($this->in_db[$uid][$cat])) {
  90                         $this->in_db[$uid][$cat] = [];
  91                 }
  92                 if (!isset($this->in_db[$uid][$cat][$key])) {
  93                         $this->in_db[$uid][$cat][$key] = false;
  94                 }
  95
  96                 if (($stored === $dbvalue) && $this->in_db[$uid][$cat][$key]) {
  97                         return true;
  98                 }
  99
 100                 // manage array value
 101                 $dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
 102
 103                 $result = DBA::update('pconfig', ['v' => $dbvalue], ['uid' => $uid, 'cat' => $cat, 'k' => $key], true);
 104
 105                 $this->in_db[$uid][$cat][$key] = $result;
 106
 107                 return $result;
 108         }
 109
 110         /**
 111          * {@inheritdoc}
 112          */
 113         public function delete($uid, $cat, $key)
 114         {
 115                 if (!$this->isConnected()) {
 116                         return false;
 117                 }
 118
 119                 if (!empty($this->in_db[$uid][$cat][$key])) {
 120                         unset($this->in_db[$uid][$cat][$key]);
 121                 }
 122
 123                 $result = DBA::delete('pconfig', ['uid' => $uid, 'cat' => $cat, 'k' => $key]);
 124
 125                 return $result;
 126         }
 127
 128         /**
 129          * {@inheritdoc}
 130          */
 131         public function isLoaded($uid, $cat, $key)
 132         {
 133                 if (!$this->isConnected()) {
 134                         return false;
 135                 }
 136
 137                 return (isset($this->in_db[$uid][$cat][$key])) && $this->in_db[$uid][$cat][$key];
 138         }
 139 }