Add Config adapter interfaces/classes

src/Core/Config/JITPConfigAdapter.php

@@ -0,0 +1,117 @@
+<?php
+namespace Friendica\Core\Config;
+
+use dba;
+use Friendica\BaseObject;
+use Friendica\Database\DBM;
+
+require_once 'include/dba.php';
+
+/**
+ * JustInTime PConfigAdapter
+ *
+ * Default PConfig Adapter. Provides the best performance for pages loading few configuration variables.
+ *
+ * @author Hypolite Petovan <mrpetovan@gmail.com>
+ */
+class JITPConfigAdapter extends BaseObject implements IPConfigAdapter
+{
+	private $in_db;
+
+	public function load($uid, $cat)
+	{
+		$a = self::getApp();
+
+		$pconfigs = dba::select('pconfig', ['v', 'k'], ['cat' => $cat, 'uid' => $uid]);
+		if (DBM::is_result($pconfigs)) {
+			while ($pconfig = dba::fetch($pconfigs)) {
+				$k = $pconfig['k'];
+				$a->config[$uid][$cat][$k] = $pconfig['v'];
+				$this->in_db[$uid][$cat][$k] = true;
+			}
+		} else if ($cat != 'config') {
+			// Negative caching
+			$a->config[$uid][$cat] = "!<unset>!";
+		}
+		dba::close($pconfigs);
+	}
+
+	public function get($uid, $cat, $k, $default_value = null, $refresh = false)
+	{
+		$a = self::getApp();
+
+		if (!$refresh) {
+			// Looking if the whole family isn't set
+			if (isset($a->config[$uid][$cat])) {
+				if ($a->config[$uid][$cat] === '!<unset>!') {
+					return $default_value;
+				}
+			}
+
+			if (isset($a->config[$uid][$cat][$k])) {
+				if ($a->config[$uid][$cat][$k] === '!<unset>!') {
+					return $default_value;
+				}
+				return $a->config[$uid][$cat][$k];
+			}
+		}
+
+		$pconfig = dba::selectFirst('pconfig', ['v'], ['uid' => $uid, 'cat' => $cat, 'k' => $k]);
+		if (DBM::is_result($pconfig)) {
+			$val = (preg_match("|^a:[0-9]+:{.*}$|s", $pconfig['v']) ? unserialize($pconfig['v']) : $pconfig['v']);
+			$a->config[$uid][$cat][$k] = $val;
+			$this->in_db[$uid][$cat][$k] = true;
+
+			return $val;
+		} else {
+			$a->config[$uid][$cat][$k] = '!<unset>!';
+			$this->in_db[$uid][$cat][$k] = false;
+
+			return $default_value;
+		}
+	}
+
+	public function set($uid, $cat, $k, $value)
+	{
+		$a = self::getApp();
+
+		// 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 = $this->get($uid, $cat, $k, null, true);
+
+		if (($stored === $dbvalue) && $this->in_db[$uid][$cat][$k]) {
+			return true;
+		}
+
+		$a->config[$uid][$cat][$k] = $dbvalue;
+
+		// manage array value
+		$dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
+
+		$result = dba::update('pconfig', ['v' => $dbvalue], ['uid' => $uid, 'cat' => $cat, 'k' => $k], true);
+
+		if ($result) {
+			$this->in_db[$uid][$cat][$k] = true;
+			return $value;
+		}
+
+		return $result;
+	}
+
+	public function delete($uid, $cat, $k)
+	{
+		$a = self::getApp();
+
+		if (!empty($a->config[$uid][$cat][$k])) {
+			unset($a->config[$uid][$cat][$k]);
+			unset($this->in_db[$uid][$cat][$k]);
+		}
+
+		$result = dba::delete('pconfig', ['uid' => $uid, 'cat' => $cat, 'k' => $k]);
+
+		return $result;
+	}
+}