Documentation added

[friendica.git] / include / Core / PConfig.php

diff --git a/include/Core/PConfig.php b/include/Core/PConfig.php
index 49b69a1f7a2d814de21e87e9e6ba2ca2bd4fa430..6ced9fc7553fc6fa1198848c123db0405490f5c9 100644 (file)
--- a/include/Core/PConfig.php
+++ b/include/Core/PConfig.php
@@ -18,6 +18,8 @@ use dbm;
  */
 class PConfig {
 
+       private static $in_db;
+
        /**
         * @brief Loads all configuration values of a user's config family into a cached storage.
         *
@@ -40,6 +42,7 @@ class PConfig {
                        foreach ($r as $rr) {
                                $k = $rr['k'];
                                $a->config[$uid][$family][$k] = $rr['v'];
+                               self::$in_db[$uid][$family][$k] = true;
                        }
                } else if ($family != 'config') {
                        // Negative caching
@@ -92,15 +95,18 @@ class PConfig {
                        dbesc($key)
                );
 
-               if (dbm::is_result($ret)) {
+               if (count($ret)) {
                        $val = (preg_match("|^a:[0-9]+:{.*}$|s", $ret[0]['v'])?unserialize( $ret[0]['v']):$ret[0]['v']);
                        $a->config[$uid][$family][$key] = $val;
+                       self::$in_db[$uid][$family][$key] = true;
 
                        return $val;
                } else {
                        $a->config[$uid][$family][$key] = '!<unset>!';
+                       self::$in_db[$uid][$family][$key] = false;
+
+                       return $default_value;
                }
-               return $default_value;
        }
 
        /**
@@ -125,18 +131,23 @@ class PConfig {
 
                $a = get_app();
 
-               $stored = self::get($uid, $family, $key);
+               // We store our setting values in a string variable.
+               // So we have to do the conversion here so that the compare below works.
+               // The exception are array values.
+               $dbvalue = (!is_array($value) ? (string)$value : $value);
+
+               $stored = self::get($uid, $family, $key, null, true);
 
-               if ($stored == $value) {
+               if (($stored === $dbvalue) AND self::$in_db[$uid][$family][$key]) {
                        return true;
                }
 
-               // manage array value
-               $dbvalue = (is_array($value) ? serialize($value):$value);
+               $a->config[$uid][$family][$key] = $dbvalue;
 
-               $a->config[$uid][$family][$key] = $value;
+               // manage array value
+               $dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
 
-                if (is_null($stored)) {
+               if (is_null($stored) OR !self::$in_db[$uid][$family][$key]) {
                        $ret = q("INSERT INTO `pconfig` (`uid`, `cat`, `k`, `v`) VALUES (%d, '%s', '%s', '%s') ON DUPLICATE KEY UPDATE `v` = '%s'",
                                intval($uid),
                                dbesc($family),
@@ -154,6 +165,7 @@ class PConfig {
                }
 
                if ($ret) {
+                       self::$in_db[$uid][$family][$key] = true;
                        return $value;
                }
                return $ret;
@@ -178,6 +190,7 @@ class PConfig {
 
                if (x($a->config[$uid][$family], $key)) {
                        unset($a->config[$uid][$family][$key]);
+                       unset(self::$in_db[$uid][$family][$key]);
                }
 
                $ret = q("DELETE FROM `pconfig` WHERE `uid` = %d AND `cat` = '%s' AND `k` = '%s'",