src/Core/Config/JITPConfigAdapter.php

   1 <?php
   2 namespace Friendica\Core\Config;
   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 implements IPConfigAdapter
  14 {
  15         private $in_db;
  16
  17         /**
  18          * The config cache of this adapter
  19          * @var IPConfigCache
  20          */
  21         private $configCache;
  22
  23         /**
  24          * @param IPConfigCache $configCache The config cache of this adapter
  25          */
  26         public function __construct(IPConfigCache $configCache)
  27         {
  28                 $this->configCache = $configCache;
  29         }
  30
  31         /**
  32          * {@inheritdoc}
  33          */
  34         public function load($uid, $cat)
  35         {
  36                 $pconfigs = DBA::select('pconfig', ['v', 'k'], ['cat' => $cat, 'uid' => $uid]);
  37                 if (DBA::isResult($pconfigs)) {
  38                         while ($pconfig = DBA::fetch($pconfigs)) {
  39                                 $k = $pconfig['k'];
  40
  41                                 $this->configCache->setP($uid, $cat, $k, $pconfig['v']);
  42
  43                                 $this->in_db[$uid][$cat][$k] = true;
  44                         }
  45                 } else if ($cat != 'config') {
  46                         // Negative caching
  47                         $this->configCache->setP($uid, $cat, null, "!<unset>!");
  48                 }
  49                 DBA::close($pconfigs);
  50         }
  51
  52         /**
  53          * {@inheritdoc}
  54          */
  55         public function get($uid, $cat, $k, $default_value = null, $refresh = false)
  56         {
  57                 if (!$refresh) {
  58                         // Looking if the whole family isn't set
  59                         if ($this->configCache->getP($uid, $cat) !== null) {
  60                                 if ($this->configCache->getP($uid, $cat) === '!<unset>!') {
  61                                         return $default_value;
  62                                 }
  63                         }
  64
  65                         if ($this->configCache->getP($uid, $cat, $k) !== null) {
  66                                 if ($this->configCache->getP($uid, $cat, $k) === '!<unset>!') {
  67                                         return $default_value;
  68                                 }
  69                                 return $this->configCache->getP($uid, $cat, $k);
  70                         }
  71                 }
  72
  73                 $pconfig = DBA::selectFirst('pconfig', ['v'], ['uid' => $uid, 'cat' => $cat, 'k' => $k]);
  74                 if (DBA::isResult($pconfig)) {
  75                         $val = (preg_match("|^a:[0-9]+:{.*}$|s", $pconfig['v']) ? unserialize($pconfig['v']) : $pconfig['v']);
  76
  77                         $this->configCache->setP($uid, $cat, $k, $val);
  78
  79                         $this->in_db[$uid][$cat][$k] = true;
  80
  81                         return $val;
  82                 } else {
  83                         $this->configCache->setP($uid, $cat, $k, '!<unset>!');
  84
  85                         $this->in_db[$uid][$cat][$k] = false;
  86
  87                         return $default_value;
  88                 }
  89         }
  90
  91         /**
  92          * {@inheritdoc}
  93          */
  94         public function set($uid, $cat, $k, $value)
  95         {
  96                 // We store our setting values in a string variable.
  97                 // So we have to do the conversion here so that the compare below works.
  98                 // The exception are array values.
  99                 $dbvalue = (!is_array($value) ? (string)$value : $value);
 100
 101                 $stored = $this->get($uid, $cat, $k, null, true);
 102
 103                 if (($stored === $dbvalue) && $this->in_db[$uid][$cat][$k]) {
 104                         return true;
 105                 }
 106
 107                 $this->configCache->setP($uid, $cat, $k, $value);
 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' => $k], true);
 113
 114                 if ($result) {
 115                         $this->in_db[$uid][$cat][$k] = true;
 116                 }
 117
 118                 return $result;
 119         }
 120
 121         /**
 122          * {@inheritdoc}
 123          */
 124         public function delete($uid, $cat, $k)
 125         {
 126                 $this->configCache->deleteP($uid, $cat, $k);
 127
 128                 if (!empty($this->in_db[$uid][$cat][$k])) {
 129                         unset($this->in_db[$uid][$cat][$k]);
 130                 }
 131
 132                 $result = DBA::delete('pconfig', ['uid' => $uid, 'cat' => $cat, 'k' => $k]);
 133
 134                 return $result;
 135         }
 136 }