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          * @param bool $mark if true, mark the selection of the current cat/key pair
  54          */
  55         public function get($uid, $cat, $key, $mark = true)
  56         {
  57                 if (!$this->isConnected()) {
  58                         return null;
  59                 }
  60
  61                 // The value was in the db, so don't check it again (unless you have to)
  62                 if ($mark) {
  63                         $this->in_db[$uid][$cat][$key] = true;
  64                 }
  65
  66                 $pconfig = DBA::selectFirst('pconfig', ['v'], ['uid' => $uid, 'cat' => $cat, 'k' => $key]);
  67                 if (DBA::isResult($pconfig)) {
  68                         $value = $this->toConfigValue($pconfig['v']);
  69
  70                         if (isset($value)) {
  71                                 return $value;
  72                         }
  73                 }
  74
  75                 $this->in_db[$uid][$cat][$key] = false;
  76                 return null;
  77         }
  78
  79         /**
  80          * {@inheritdoc}
  81          */
  82         public function set($uid, $cat, $key, $value)
  83         {
  84                 if (!$this->isConnected()) {
  85                         return false;
  86                 }
  87
  88                 // We store our setting values in a string variable.
  89                 // So we have to do the conversion here so that the compare below works.
  90                 // The exception are array values.
  91                 $dbvalue = (!is_array($value) ? (string)$value : $value);
  92
  93                 $stored = $this->get($uid, $cat, $key, false);
  94
  95                 if (!isset($this->in_db[$uid])) {
  96                         $this->in_db[$uid] = [];
  97                 }
  98                 if (!isset($this->in_db[$uid][$cat])) {
  99                         $this->in_db[$uid][$cat] = [];
 100                 }
 101                 if (!isset($this->in_db[$uid][$cat][$key])) {
 102                         $this->in_db[$uid][$cat][$key] = false;
 103                 }
 104
 105                 if (($stored === $dbvalue) && $this->in_db[$uid][$cat][$key]) {
 106                         return true;
 107                 }
 108
 109                 // manage array value
 110                 $dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
 111
 112                 $result = DBA::update('pconfig', ['v' => $dbvalue], ['uid' => $uid, 'cat' => $cat, 'k' => $key], true);
 113
 114                 $this->in_db[$uid][$cat][$key] = $result;
 115
 116                 return $result;
 117         }
 118
 119         /**
 120          * {@inheritdoc}
 121          */
 122         public function delete($uid, $cat, $key)
 123         {
 124                 if (!$this->isConnected()) {
 125                         return false;
 126                 }
 127
 128                 if (isset($this->in_db[$uid][$cat][$key])) {
 129                         unset($this->in_db[$uid][$cat][$key]);
 130                 }
 131
 132                 return DBA::delete('pconfig', ['uid' => $uid, 'cat' => $cat, 'k' => $key]);
 133         }
 134
 135         /**
 136          * {@inheritdoc}
 137          */
 138         public function isLoaded($uid, $cat, $key)
 139         {
 140                 if (!$this->isConnected()) {
 141                         return false;
 142                 }
 143
 144                 return (isset($this->in_db[$uid][$cat][$key])) && $this->in_db[$uid][$cat][$key];
 145         }
 146 }