From 43d268274473cd99f16e12271bee49767867ca88 Mon Sep 17 00:00:00 2001
From: Valentin Popov <info@valentineus.link>
Date: Sat, 9 Jun 2018 11:39:03 +0400
Subject: External API

Signed-off-by: Valentin Popov <info@valentineus.link>
---
 externallib.php | 237 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 237 insertions(+)
 create mode 100644 externallib.php

diff --git a/externallib.php b/externallib.php
new file mode 100644
index 0000000..8054fcc
--- /dev/null
+++ b/externallib.php
@@ -0,0 +1,237 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * External API.
+ *
+ * @copyright   2018 "Valentin Popov" <info@valentineus.link>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @package     tool_apisiteadmins
+ */
+
+defined("MOODLE_INTERNAL") || die();
+
+require_once(__DIR__ . "/lib.php");
+
+require_once($CFG->dirroot . "/lib/external/externallib.php");
+require_once($CFG->dirroot . "/user/externallib.php");
+require_once($CFG->dirroot . "/user/lib.php");
+
+/**
+ * External functions.
+ *
+ * @copyright   2018 "Valentin Popov" <info@valentineus.link>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @package     tool_apisiteadmins
+ */
+class tool_apisiteadmins_external extends external_api {
+    /**
+     * Returns description of method parameters.
+     *
+     * @return  external_function_parameters
+     * @since   Moodle 2.2
+     */
+    public static function add_to_administrators_parameters() {
+        return new external_function_parameters(
+            array(
+                "userid" => new external_value(PARAM_INT, "ID of the user")
+            )
+        );
+    }
+
+    /**
+     * Adds a user to the list of administrators.
+     *
+     * @param   number  $userid System user ID
+     * @return  boolean         Result of execution
+     * @since   Moodle 2.2
+     * @throws  moodle_exception
+     */
+    public static function add_to_administrators($userid) {
+        $parameters = self::validate_parameters(self::add_to_administrators_parameters(), array("userid" => $userid));
+
+        $context = context_system::instance();
+        self::validate_context($context);
+
+        return tool_apisiteadmins::add_user($parameters["userid"]);
+    }
+
+    /**
+     * Returns description of method result value.
+     *
+     * @return  external_description
+     * @since   Moodle 2.2
+     */
+    public static function add_to_administrators_returns() {
+        return new external_value(PARAM_BOOL, "Result of execution");
+    }
+
+    /**
+     * Returns description of method parameters.
+     *
+     * @return  external_function_parameters
+     * @since   Moodle 2.2
+     */
+    public static function remove_from_administrators_parameters() {
+        return new external_function_parameters(
+            array(
+                "userid" => new external_value(PARAM_INT, "ID of the user")
+            )
+        );
+    }
+
+    /**
+     * Removes a user from the list of administrators.
+     *
+     * @param   number  $userid System user ID
+     * @return  boolean         Result of execution
+     * @since   Moodle 2.2
+     * @throws  moodle_exception
+     */
+    public static function remove_from_administrators($userid) {
+        $parameters = self::validate_parameters(self::remove_from_administrators_parameters(), array("userid" => $userid));
+
+        $context = context_system::instance();
+        self::validate_context($context);
+
+        return tool_apisiteadmins::remove_user($parameters["userid"]);
+    }
+
+    /**
+     * Returns description of method result value.
+     *
+     * @return  external_description
+     * @since   Moodle 2.2
+     */
+    public static function remove_from_administrators_returns() {
+        return new external_value(PARAM_BOOL, "Result of execution");
+    }
+
+    /**
+     * Returns description of method parameters.
+     *
+     * @return  external_function_parameters
+     * @since   Moodle 2.2
+     */
+    public static function change_main_administrator_parameters() {
+        return new external_function_parameters(
+            array(
+                "userid" => new external_value(PARAM_INT, "ID of the user")
+            )
+        );
+    }
+
+    /**
+     * Registers the user as the primary administrator.
+     *
+     * @param   number  $userid System user ID
+     * @return  boolean         Result of execution
+     * @since   Moodle 2.2
+     * @throws  moodle_exception
+     */
+    public static function change_main_administrator($userid) {
+        $parameters = self::validate_parameters(self::change_main_administrator_parameters(), array("userid" => $userid));
+
+        $context = context_system::instance();
+        self::validate_context($context);
+
+        return tool_apisiteadmins::set_main($parameters["userid"]);
+    }
+
+    /**
+     * Returns description of method result value.
+     *
+     * @return  external_description
+     * @since   Moodle 2.2
+     */
+    public static function change_main_administrator_returns() {
+        return new external_value(PARAM_BOOL, "Result of execution");
+    }
+
+    /**
+     * Returns description of method parameters.
+     *
+     * @return  external_function_parameters
+     * @since   Moodle 2.2
+     */
+    public static function get_main_administrator_parameters() {
+        return new external_function_parameters(array());
+    }
+
+    /**
+     * Gets information about the main administrator.
+     *
+     * @return  array           An array of arrays containg user profiles
+     * @since   Moodle 2.2
+     */
+    public static function get_main_administrator() {
+        $context = context_system::instance();
+        self::validate_context($context);
+
+        $result = array();
+        $result[] = user_get_user_details(get_admin());
+
+        return $result;
+    }
+
+    /**
+     * Returns description of method result value.
+     *
+     * @return  external_description
+     * @since   Moodle 2.2
+     */
+    public static function get_main_administrator_returns() {
+        return new external_multiple_structure(core_user_external::user_description());
+    }
+
+    /**
+     * Returns description of method parameters.
+     *
+     * @return  external_function_parameters
+     * @since   Moodle 2.2
+     */
+    public static function get_list_administrators_parameters() {
+        return new external_function_parameters(array());
+    }
+
+    /**
+     * Gets the list of administrators in the system.
+     *
+     * @return  array           An array of arrays containg user profiles
+     * @since   Moodle 2.2
+     */
+    public static function get_list_administrators() {
+        $context = context_system::instance();
+        self::validate_context($context);
+
+        $result = array();
+        foreach (get_admins() as $user) {
+            $result[] = user_get_user_details($user);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Returns description of method result value.
+     *
+     * @return  external_description
+     * @since   Moodle 2.2
+     */
+    public static function get_list_administrators_returns() {
+        return new external_multiple_structure(core_user_external::user_description());
+    }
+}
-- 
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