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<?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/>.

/**
 * Contains a test class for the message helper.
 *
 * @package core_message
 * @category test
 * @copyright 2018 Jake Dallimore <jrhdallimore@gmail.com>
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

global $CFG;

require_once($CFG->dirroot . '/message/tests/messagelib_test.php');

/**
 * Tests for the message helper class.
 *
 * @package core_message
 * @category test
 * @copyright 2018 Jake Dallimore <jrhdallimore@gmail.com>
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class core_message_helper_testcase extends advanced_testcase {

public function setUp() {
        $this->resetAfterTest(true);
    }

public function test_get_member_info_ordering() {
        // Create a conversation with several users.
        $user1 = self::getDataGenerator()->create_user();
        $user2 = self::getDataGenerator()->create_user();
        $user3 = self::getDataGenerator()->create_user();
        $user4 = self::getDataGenerator()->create_user();

\core_message\api::create_conversation(
            \core_message\api::MESSAGE_CONVERSATION_TYPE_GROUP,
            [
                $user1->id,
                $user2->id,
                $user3->id,
                $user4->id,
            ],
            'Group conversation'
        );

// Verify that the member information comes back in the same order that we specified in the input array.
        $memberinfo = \core_message\helper::get_member_info($user1->id, [$user3->id, $user4->id, $user2->id]);
        $this->assertEquals($user3->id, array_shift($memberinfo)->id);
        $this->assertEquals($user4->id, array_shift($memberinfo)->id);
        $this->assertEquals($user2->id, array_shift($memberinfo)->id);
    }

/**
     * Test search_get_user_details returns the correct profile data when $CFG->messagingallusers is disabled.
     */
    public function test_search_get_user_details_sitewide_disabled() {
        global $DB;
        set_config('messagingallusers', false);

// Two students sharing course 1, visible profile within course (no groups).
        $user1 = $this->getDataGenerator()->create_user();
        $user2 = $this->getDataGenerator()->create_user();
        $course1 = $this->getDataGenerator()->create_course((object) ['groupmode' => 0]);
        $this->getDataGenerator()->enrol_user($user1->id, $course1->id);
        $this->getDataGenerator()->enrol_user($user2->id, $course1->id);

// A teacher in course 1.
        $user3 = $this->getDataGenerator()->create_user();
        $this->getDataGenerator()->enrol_user($user3->id, $course1->id, 'editingteacher');

// Two students sharing course 2, separate groups (profiles not visible to one another).
        // Note: no groups are created here, but separate groups mode alone is enough to restrict profile access.
        $user4 = $this->getDataGenerator()->create_user();
        $user5 = $this->getDataGenerator()->create_user();
        $course2 = $this->getDataGenerator()->create_course((object) ['groupmode' => 1]);
        $this->getDataGenerator()->enrol_user($user4->id, $course2->id);
        $this->getDataGenerator()->enrol_user($user5->id, $course2->id);

// A teacher in course 2.
        $user6 = $this->getDataGenerator()->create_user();
        $this->getDataGenerator()->enrol_user($user6->id, $course2->id, 'editingteacher');

// Teacher and course contact in course 3.
        $user7 = $this->getDataGenerator()->create_user();
        $course3 = $this->getDataGenerator()->create_course();
        $this->getDataGenerator()->enrol_user($user7->id, $course3->id, 'editingteacher');
        $teacherrole = $DB->get_record('role', array('shortname' => 'editingteacher'));

// Make teachers course contacts.
        set_config('coursecontact', $teacherrole->id);

// User 1 should be able to see users within their course, but not course contacts or students in other courses.
        $this->setUser($user1);
        $this->assertNotEmpty(\core_message\helper::search_get_user_details($user2)); // Student in same course.
        $this->assertEmpty(\core_message\helper::search_get_user_details($user4)); // Student in another course.
        $this->assertNotEmpty(\core_message\helper::search_get_user_details($user3)); // Teacher in same course.
        $this->assertEmpty(\core_message\helper::search_get_user_details($user7)); // Teacher (course contact) in another course.

// User 3 should be able to see the teacher in their own course, but not other students in that course nor course contacts
        // or students in other courses.
        $this->setUser($user4);
        $this->assertEmpty(\core_message\helper::search_get_user_details($user5)); // Student in same course.
        $this->assertEmpty(\core_message\helper::search_get_user_details($user1)); // Student in another course.
        $this->assertNotEmpty(\core_message\helper::search_get_user_details($user6)); // Teacher in same course.
        $this->assertEmpty(\core_message\helper::search_get_user_details($user7)); // Teacher (course contact) in another course.
    }

/**
     * Test search_get_user_details returns the correct profile data when $CFG->messagingallusers is enabled.
     */
    public function test_search_get_user_details_sitewide_enabled() {
        global $DB;
        set_config('messagingallusers', true);

// A teacher in course 1.
        $user3 = $this->getDataGenerator()->create_user();
        $this->getDataGenerator()->enrol_user($user3->id, $course1->id, 'editingteacher');

// A teacher in course 2.
        $user6 = $this->getDataGenerator()->create_user();
        $this->getDataGenerator()->enrol_user($user6->id, $course2->id, 'editingteacher');

// Make teachers course contacts.
        set_config('coursecontact', $teacherrole->id);

// User 1 should be able to see users within their course and course contacts, but not students in other courses.
        $this->setUser($user1);
        $this->assertNotEmpty(\core_message\helper::search_get_user_details($user2)); // Student in same course.
        $this->assertEmpty(\core_message\helper::search_get_user_details($user4)); // Student in another course.
        $this->assertNotEmpty(\core_message\helper::search_get_user_details($user3)); // Teacher in same course.
        $this->assertNotEmpty(\core_message\helper::search_get_user_details($user7)); // Teacher (course contact) in another course.

// User 3 should be able to see the teacher in their own course, but not other students in that course nor course contacts
        // or students in other courses.
        $this->setUser($user4);
        $this->assertEmpty(\core_message\helper::search_get_user_details($user5)); // Student in same course.
        $this->assertEmpty(\core_message\helper::search_get_user_details($user1)); // Student in another course.
        $this->assertNotEmpty(\core_message\helper::search_get_user_details($user6)); // Teacher in same course.
        $this->assertNotEmpty(\core_message\helper::search_get_user_details($user7)); // Teacher (course contact) in another course.
    }
}