<?php

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

    gatekeeper();
	action_gatekeeper();

    global $Dippler;

    $course = (int)get_input('course');
	$id = (int)get_input('resource');
	$title = get_input('title');
	$author = get_input('author');
	$description = get_input('description');
	$published = get_input('published');
	$tags = get_input('tags');
	$folder = get_input('folder');
	$categories = get_input('categories', array());

	// Cache variables
	$input_values = array();
    $input_values['title'] = $title;
	$input_values['author'] = $author;
    $input_values['description'] = $description;
	$input_values['published'] = $published;
	$input_values['tags'] = $tags;
	$input_values['folder'] = $folder;
	$input_values['categories'] = $categories;
    $_SESSION['input_values'] = $input_values;

	if (empty($title)) {
		$Dippler->add_system_message(_("At least one of the parameters is empty."), 'error');
		forward("course/resources/{$course}/resource/{$id}/edit");
	} else if (empty($course)) {
	    $Dippler->add_system_message(_("Course not found"), 'error');
		forward('courses/my');
	} else if (empty($id)) {
	    $Dippler->add_system_message(_("Resource not found"), 'error');
		forward("course/resources/{$course}");
	} else {
		$lre = new LearningResource($id);
		$lre->load();
		$lre->title = $title;
		$lre->author = $author;
		$lre->description = $description;
        if (strtotime($published)) {
			$published = strtotime($published);
        } else {
			$published = null;
		}
		$lre->published = $published;
		if (isset($tags)) {
		    $lre->tags = explode(",", $tags);
		}
		$lre->folder = $folder;
		$new_cats = array();
		$data_categories = $Dippler->listCourseCategoriesFull($course);
		foreach ($categories as $cat_id) {
		    $new_cats[$cat_id] = $data_categories[$cat_id];
		}
		$lre->categories = $new_cats;
		if (!$lre->save()) {
		    $Dippler->add_system_message(_("Resource could not be saved."), 'error');
			forward("course/resources/{$course}/resource/{$id}/edit");
		}

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

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

	forward('courses/my');
?>