<?php

    require_once(dirname(dirname(__FILE__))."/engine/engine.php");

    gatekeeper();
	action_gatekeeper();

    global $Dippler;

    $course = (int)get_input('course');
    $id = (int)get_input('post');
	$title = get_input('post_title');
	$body = get_input('post_body');
	$tags = get_input('post_tags');

	// Cache variables
	$input_values = array();
    $input_values['post_title'] = $title;
    $input_values['post_body'] = $body;
    $input_values['post_tags'] = $tags;
    $_SESSION['input_values'] = $input_values;

	if (empty($title) || empty($body)) {
		$Dippler->add_system_message(_("At least one of the parameters is empty."), 'error');
		forward("course/announcements/{$course}/post/{$id}/edit");
	} else if (empty($course)) {
	    $Dippler->add_system_message(_("Course not found"), 'error');
		forward('courses/my');
	} else if (empty($id)) {
	    $Dippler->add_system_message(_("Announcement not found"), 'error');
		forward("course/announcements/{$course}");
	} else {
		$post = new CourseBlogPost($id);
		$post->load();
		$post->title = $title;
		$post->body = $body;
		if (isset($tags)) {
		    $post->tags = explode(",", $tags);
		}
		if (!$post->save()) {
		    $Dippler->add_system_message(_("Announcement could not be saved."), 'error');
			forward("course/announcements/{$course}/post/{$id}/edit");
		}

		$Dippler->add_system_message(_("Announcement saved."));

		// Clear cache
        $Dippler->clearSessionInputValues();
		forward($post->getURL());
	}

	forward('courses/my');
?>