Config FollowUp

- New Configuration (Config is now only holding the instance)
- New PConfiguration (PConfig is now only holding the instance)

- Config & PConfig-Adapter don't need "ConfigCache" anymore

- DB-Connection is now outside App->reload() for better dependency-chaining

src/Core/Config/Adapter/IConfigAdapter.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace Friendica\Core\Config\Adapter;
+
+/**
+ *
+ * @author Hypolite Petovan <hypolite@mrpetovan.com>
+ */
+interface IConfigAdapter
+{
+	/**
+	 * Loads all configuration values into a cached storage.
+	 *
+	 * @param string  $cat The category of the configuration values to load
+	 *
+	 * @return array
+	 */
+	public function load($cat = "config");
+
+	/**
+	 * Get a particular user's config variable given the category name
+	 * ($family) and a key.
+	 *
+	 * @param string  $cat The category of the configuration value
+	 * @param string  $key The configuration key to query
+	 *
+	 * @return mixed Stored value or "!<unset>!" if it does not exist
+	 */
+	public function get($cat, $key);
+
+	/**
+	 * Stores a config value ($value) in the category ($family) under the key ($key)
+	 * for the user_id $uid.
+	 *
+	 * Note: Please do not store booleans - convert to 0/1 integer values!
+	 *
+	 * @param string $cat   The category of the configuration value
+	 * @param string $key   The configuration key to set
+	 * @param mixed  $value The value to store
+	 *
+	 * @return bool Operation success
+	 */
+	public function set($cat, $key, $value);
+
+	/**
+	 * Removes the configured value from the stored cache
+	 * and removes it from the database.
+	 *
+	 * @param string $cat The category of the configuration value
+	 * @param string $key   The configuration key to delete
+	 *
+	 * @return mixed
+	 */
+	public function delete($cat, $key);
+
+	/**
+	 * Checks, if the current adapter is connected to the backend
+	 *
+	 * @return bool
+	 */
+	public function isConnected();
+}