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 = $this->toConfigValue($pconfig['v']);
  33
  34                                 // The value was in the db, so don't check it again (unless you have to)
  35                                 $this->in_db[$uid][$cat][$key] = true;
  36
  37                                 if (isset($value)) {
  38                                         $return[$key] = $value;
  39                                 }
  40                         }
  41                 } else if ($cat != 'config') {
  42                         // Negative caching
  43                         $return = null;
  44                 }
  45                 DBA::close($pconfigs);
  46
  47                 return [$cat => $return];
  48         }
  49
  50         /**
  51          * {@inheritdoc}
  52          */
  53         public function get($uid, $cat, $key)
  54         {
  55                 if (!$this->isConnected()) {
  56                         return null;
  57                 }
  58
  59                 // The value was in the db, so don't check it again (unless you have to)
  60                 $this->in_db[$uid][$cat][$key] = true;
  61
  62                 $pconfig = DBA::selectFirst('pconfig', ['v'], ['uid' => $uid, 'cat' => $cat, 'k' => $key]);
  63                 if (DBA::isResult($pconfig)) {
  64                         $value = $this->toConfigValue($pconfig['v']);
  65
  66                         if (isset($value)) {
  67                                 return $value;
  68                         }
  69                 }
  70
  71                 $this->in_db[$uid][$cat][$key] = false;
  72                 return null;
  73         }
  74
  75         /**
  76          * {@inheritdoc}
  77          */
  78         public function set($uid, $cat, $key, $value)
  79         {
  80                 if (!$this->isConnected()) {
  81                         return false;
  82                 }
  83
  84                 // We store our setting values in a string variable.
  85                 // So we have to do the conversion here so that the compare below works.
  86                 // The exception are array values.
  87                 $dbvalue = (!is_array($value) ? (string)$value : $value);
  88
  89                 $stored = $this->get($uid, $cat, $key);
  90
  91                 if (!isset($this->in_db[$uid])) {
  92                         $this->in_db[$uid] = [];
  93                 }
  94                 if (!isset($this->in_db[$uid][$cat])) {
  95                         $this->in_db[$uid][$cat] = [];
  96                 }
  97                 if (!isset($this->in_db[$uid][$cat][$key])) {
  98                         $this->in_db[$uid][$cat][$key] = false;
  99                 }
 100
 101                 if (($stored === $dbvalue) && $this->in_db[$uid][$cat][$key]) {
 102                         return true;
 103                 }
 104
 105                 // manage array value
 106                 $dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
 107
 108                 $result = DBA::update('pconfig', ['v' => $dbvalue], ['uid' => $uid, 'cat' => $cat, 'k' => $key], true);
 109
 110                 $this->in_db[$uid][$cat][$key] = $result;
 111
 112                 return $result;
 113         }
 114
 115         /**
 116          * {@inheritdoc}
 117          */
 118         public function delete($uid, $cat, $key)
 119         {
 120                 if (!$this->isConnected()) {
 121                         return false;
 122                 }
 123
 124                 if (isset($this->in_db[$uid][$cat][$key])) {
 125                         unset($this->in_db[$uid][$cat][$key]);
 126                 }
 127
 128                 return DBA::delete('pconfig', ['uid' => $uid, 'cat' => $cat, 'k' => $key]);
 129         }
 130
 131         /**
 132          * {@inheritdoc}
 133          */
 134         public function isLoaded($uid, $cat, $key)
 135         {
 136                 if (!$this->isConnected()) {
 137                         return false;
 138                 }
 139
 140                 return (isset($this->in_db[$uid][$cat][$key])) && $this->in_db[$uid][$cat][$key];
 141         }
 142 }