[ticket/13740] Implementation of the new installer framework

[ci skip]

PHPBB3-13740

phpBB/install/task_interface.php

@@ -0,0 +1,47 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install;
+
+/**
+ * Interface for installer tasks
+ */
+interface task_interface
+{
+	/**
+	 * Checks if the task is essential to install phpBB or it can be skipped
+	 *
+	 * Note: Please note that all the non-essential modules have to implement check_requirements()
+	 * method.
+	 *
+	 * @return	bool	true if the task is essential, false otherwise
+	 */
+	public function is_essential();
+
+	/**
+	 * Checks requirements for the tasks
+	 *
+	 * Note: Only need to be implemented for non-essential tasks, as essential tasks
+	 * requirements should be checked in the requirements install module.
+	 *
+	 * @return bool	true if the task's requirements are met
+	 */
+	public function check_requirements();
+
+	/**
+	 * Executes the task
+	 *
+	 * @return null
+	 */
+	public function run();
+}