src/Core/Config/Adapter/PreloadPConfigAdapter.php

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