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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/>.

/**
 * Unit tests for mod_lti lib
 *
 * @package    mod_lti
 * @category   external
 * @copyright  2015 Juan Leyva <juan@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @since      Moodle 3.0
 */

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

/**
     * Prepares things before this test case is initialised
     * @return void
     */
    public static function setUpBeforeClass() {
        global $CFG;
        require_once($CFG->dirroot . '/mod/lti/lib.php');
    }

/**
     * Test lti_view
     * @return void
     */
    public function test_lti_view() {
        global $CFG;

$CFG->enablecompletion = 1;
        $this->resetAfterTest();

$this->setAdminUser();
        // Setup test data.
        $course = $this->getDataGenerator()->create_course(array('enablecompletion' => 1));
        $lti = $this->getDataGenerator()->create_module('lti', array('course' => $course->id),
                                                            array('completion' => 2, 'completionview' => 1));
        $context = context_module::instance($lti->cmid);
        $cm = get_coursemodule_from_instance('lti', $lti->id);

// Trigger and capture the event.
        $sink = $this->redirectEvents();

lti_view($lti, $course, $cm, $context);

$events = $sink->get_events();
        // 2 additional events thanks to completion.
        $this->assertCount(3, $events);
        $event = array_shift($events);

// Checking that the event contains the expected values.
        $this->assertInstanceOf('\mod_lti\event\course_module_viewed', $event);
        $this->assertEquals($context, $event->get_context());
        $moodleurl = new \moodle_url('/mod/lti/view.php', array('id' => $cm->id));
        $this->assertEquals($moodleurl, $event->get_url());
        $this->assertEventContextNotUsed($event);
        $this->assertNotEmpty($event->get_name());

// Check completion status.
        $completion = new completion_info($course);
        $completiondata = $completion->get_data($cm);
        $this->assertEquals(1, $completiondata->completionstate);

}

/**
     * Test deleting LTI instance.
     */
    public function test_lti_delete_instance() {
        $this->resetAfterTest();

$this->setAdminUser();
        $course = $this->getDataGenerator()->create_course(array());
        $lti = $this->getDataGenerator()->create_module('lti', array('course' => $course->id));
        $cm = get_coursemodule_from_instance('lti', $lti->id);

// Must not throw notices.
        course_delete_module($cm->id);
    }

public function test_lti_core_calendar_provide_event_action() {
        $this->resetAfterTest();
        $this->setAdminUser();

// Create the activity.
        $course = $this->getDataGenerator()->create_course();
        $lti = $this->getDataGenerator()->create_module('lti', array('course' => $course->id));

// Create a calendar event.
        $event = $this->create_action_event($course->id, $lti->id,
            \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);

// Create an action factory.
        $factory = new \core_calendar\action_factory();

// Decorate action event.
        $actionevent = mod_lti_core_calendar_provide_event_action($event, $factory);

// Confirm the event was decorated.
        $this->assertInstanceOf('\core_calendar\local\event\value_objects\action', $actionevent);
        $this->assertEquals(get_string('view'), $actionevent->get_name());
        $this->assertInstanceOf('moodle_url', $actionevent->get_url());
        $this->assertEquals(1, $actionevent->get_item_count());
        $this->assertTrue($actionevent->is_actionable());
    }

public function test_lti_core_calendar_provide_event_action_as_non_user() {
        global $CFG;

$this->resetAfterTest();
        $this->setAdminUser();

// Create the activity.
        $course = $this->getDataGenerator()->create_course();
        $lti = $this->getDataGenerator()->create_module('lti', array('course' => $course->id));

// Create a calendar event.
        $event = $this->create_action_event($course->id, $lti->id,
            \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);

// Now, log out.
        $CFG->forcelogin = true; // We don't want to be logged in as guest, as guest users might still have some capabilities.
        $this->setUser();

// Create an action factory.
        $factory = new \core_calendar\action_factory();

// Decorate action event.
        $actionevent = mod_lti_core_calendar_provide_event_action($event, $factory);

// Confirm the event is not shown at all.
        $this->assertNull($actionevent);
    }

public function test_lti_core_calendar_provide_event_action_for_user() {
        global $CFG;

$this->resetAfterTest();
        $this->setAdminUser();

// Create the activity.
        $course = $this->getDataGenerator()->create_course();
        $lti = $this->getDataGenerator()->create_module('lti', array('course' => $course->id));

// Enrol a student in the course.
        $student = $this->getDataGenerator()->create_and_enrol($course, 'student');

// Create a calendar event.
        $event = $this->create_action_event($course->id, $lti->id,
            \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);

// Now, log out.
        $CFG->forcelogin = true; // We don't want to be logged in as guest, as guest users might still have some capabilities.
        $this->setUser();

// Create an action factory.
        $factory = new \core_calendar\action_factory();

// Decorate action event for the student.
        $actionevent = mod_lti_core_calendar_provide_event_action($event, $factory, $student->id);

public function test_lti_core_calendar_provide_event_action_already_completed() {
        global $CFG;

$this->resetAfterTest();
        $this->setAdminUser();

$CFG->enablecompletion = 1;

// Create the activity.
        $course = $this->getDataGenerator()->create_course(array('enablecompletion' => 1));
        $lti = $this->getDataGenerator()->create_module('lti', array('course' => $course->id),
            array('completion' => 2, 'completionview' => 1, 'completionexpected' => time() + DAYSECS));

// Get some additional data.
        $cm = get_coursemodule_from_instance('lti', $lti->id);

// Create a calendar event.
        $event = $this->create_action_event($course->id, $lti->id,
            \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);

// Mark the activity as completed.
        $completion = new completion_info($course);
        $completion->set_module_viewed($cm);

// Create an action factory.
        $factory = new \core_calendar\action_factory();

// Decorate action event.
        $actionevent = mod_lti_core_calendar_provide_event_action($event, $factory);

// Ensure result was null.
        $this->assertNull($actionevent);
    }

public function test_lti_core_calendar_provide_event_action_already_completed_as_non_user() {
        global $CFG;

$this->resetAfterTest();
        $this->setAdminUser();

$CFG->enablecompletion = 1;

// Get some additional data.
        $cm = get_coursemodule_from_instance('lti', $lti->id);

// Create a calendar event.
        $event = $this->create_action_event($course->id, $lti->id,
            \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);

// Mark the activity as completed.
        $completion = new completion_info($course);
        $completion->set_module_viewed($cm);

// Now, log out.
        $CFG->forcelogin = true; // We don't want to be logged in as guest, as guest users might still have some capabilities.
        $this->setUser();

// Create an action factory.
        $factory = new \core_calendar\action_factory();

// Decorate action event.
        $actionevent = mod_lti_core_calendar_provide_event_action($event, $factory);

// Ensure result was null.
        $this->assertNull($actionevent);
    }

public function test_lti_core_calendar_provide_event_action_already_completed_for_user() {
        global $CFG;

$this->resetAfterTest();
        $this->setAdminUser();

$CFG->enablecompletion = 1;

// Enrol 2 students in the course.
        $student1 = $this->getDataGenerator()->create_and_enrol($course, 'student');
        $student2 = $this->getDataGenerator()->create_and_enrol($course, 'student');

// Get some additional data.
        $cm = get_coursemodule_from_instance('lti', $lti->id);

// Create a calendar event.
        $event = $this->create_action_event($course->id, $lti->id,
            \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);

// Mark the activity as completed for $student1.
        $completion = new completion_info($course);
        $completion->set_module_viewed($cm, $student1->id);

// Now, log in as $student2.
        $this->setUser($student2);

// Create an action factory.
        $factory = new \core_calendar\action_factory();

// Decorate action event for $student1.
        $actionevent = mod_lti_core_calendar_provide_event_action($event, $factory, $student1->id);

// Ensure result was null.
        $this->assertNull($actionevent);
    }

/**
     * Creates an action event.
     *
     * @param int $courseid The course id.
     * @param int $instanceid The instance id.
     * @param string $eventtype The event type.
     * @return bool|calendar_event
     */
    private function create_action_event($courseid, $instanceid, $eventtype) {
        $event = new stdClass();
        $event->name = 'Calendar event';
        $event->modulename  = 'lti';
        $event->courseid = $courseid;
        $event->instance = $instanceid;
        $event->type = CALENDAR_EVENT_TYPE_ACTION;
        $event->eventtype = $eventtype;
        $event->timestart = time();

return calendar_event::create($event);
    }
}