/**
 * Verify and delete the post.  The post can be a discussion post.
 *
 * @param object $course
 * @param object $cm
 * @param object $forum
 * @param context_module $modcontext
 * @param object $discussion
 * @param object $post
 * @return string The URL to redirect to
 */
function hsuforum_verify_and_delete_post($course, $cm, $forum, $modcontext, $discussion, $post)
{
    global $CFG, $USER;
    // Check user capability to delete post.
    $timepassed = time() - $post->created;
    if ($timepassed > $CFG->maxeditingtime && !has_capability('mod/hsuforum:deleteanypost', $modcontext)) {
        print_error("cannotdeletepost", "hsuforum", hsuforum_go_back_to("discuss.php?d={$post->discussion}"));
    }
    if ($post->totalscore) {
        print_error('couldnotdeleteratings', 'rating', hsuforum_go_back_to("discuss.php?d={$post->discussion}"));
    }
    if (hsuforum_count_replies($post) && !has_capability('mod/hsuforum:deleteanypost', $modcontext)) {
        print_error("couldnotdeletereplies", "hsuforum", hsuforum_go_back_to("discuss.php?d={$post->discussion}"));
    }
    if (!$post->parent) {
        // post is a discussion topic as well, so delete discussion
        if ($forum->type == 'single') {
            print_error('cannnotdeletesinglediscussion', 'hsuforum', hsuforum_go_back_to("discuss.php?d={$post->discussion}"));
        }
        hsuforum_delete_discussion($discussion, false, $course, $cm, $forum);
        $params = array('objectid' => $discussion->id, 'context' => $modcontext, 'other' => array('forumid' => $forum->id));
        $event = \mod_hsuforum\event\discussion_deleted::create($params);
        $event->add_record_snapshot('hsuforum_discussions', $discussion);
        $event->trigger();
        return $CFG->wwwroot . "/mod/hsuforum/view.php?id={$cm->id}";
    }
    if (!hsuforum_delete_post($post, has_capability('mod/hsuforum:deleteanypost', $modcontext), $course, $cm, $forum)) {
        print_error('errorwhiledelete', 'hsuforum');
    }
    if ($forum->type == 'single') {
        // Single discussion forums are an exception. We show
        // the forum itself since it only has one discussion
        // thread.
        $discussionurl = "view.php?f={$forum->id}";
    } else {
        $discussionurl = "discuss.php?d={$post->discussion}";
    }
    $params = array('context' => $modcontext, 'objectid' => $post->id, 'other' => array('discussionid' => $discussion->id, 'forumid' => $forum->id, 'forumtype' => $forum->type));
    if ($post->userid !== $USER->id) {
        $params['relateduserid'] = $post->userid;
    }
    $event = \mod_hsuforum\event\post_deleted::create($params);
    $event->add_record_snapshot('hsuforum_posts', $post);
    $event->add_record_snapshot('hsuforum_discussions', $discussion);
    $event->trigger();
    return hsuforum_go_back_to($discussionurl);
}
 /**
  * Test discussion_deleted event.
  */
 public function test_discussion_deleted()
 {
     // Setup test data.
     $course = $this->getDataGenerator()->create_course();
     $forum = $this->getDataGenerator()->create_module('hsuforum', array('course' => $course->id));
     $user = $this->getDataGenerator()->create_user();
     // Add a discussion.
     $record = array();
     $record['course'] = $course->id;
     $record['forum'] = $forum->id;
     $record['userid'] = $user->id;
     $discussion = $this->getDataGenerator()->get_plugin_generator('mod_hsuforum')->create_discussion($record);
     $context = context_module::instance($forum->cmid);
     $params = array('context' => $context, 'objectid' => $discussion->id, 'other' => array('forumid' => $forum->id));
     $event = \mod_hsuforum\event\discussion_deleted::create($params);
     // Trigger and capture the event.
     $sink = $this->redirectEvents();
     $event->trigger();
     $events = $sink->get_events();
     $this->assertCount(1, $events);
     $event = reset($events);
     // Checking that the event contains the expected values.
     $this->assertInstanceOf('\\mod_hsuforum\\event\\discussion_deleted', $event);
     $this->assertEquals($context, $event->get_context());
     $expected = array($course->id, 'hsuforum', 'delete discussion', "view.php?id={$forum->cmid}", $forum->id, $forum->cmid);
     $this->assertEventLegacyLogData($expected, $event);
     $this->assertEventContextNotUsed($event);
     $this->assertNotEmpty($event->get_name());
 }