<?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/>.

/**
 * Class containing data for my overview block.
 *
 * @package    block_myoverview
 * @copyright  2017 Ryan Wyllie <ryan@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
namespace block_myoverview\output;
defined('MOODLE_INTERNAL') || die();

use renderable;
use renderer_base;
use templatable;

require_once($CFG->dirroot . '/blocks/myoverview/lib.php');

/**
 * Class containing data for my overview block.
 *
 * @copyright  2018 Bas Brands <bas@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class main implements renderable, templatable {

    /**
     * Store the grouping preference
     *
     * @var string String matching the grouping constants defined in myoverview/lib.php
     */
    private $grouping;

    /**
     * Store the sort preference
     *
     * @var string String matching the sort constants defined in myoverview/lib.php
     */
    private $sort;

    /**
     * Store the view preference
     *
     * @var string String matching the view/display constants defined in myoverview/lib.php
     */
    private $view;

    /**
     * Store the paging preference
     *
     * @var string String matching the paging constants defined in myoverview/lib.php
     */
    private $paging;

    /**
     * Store the display categories config setting
     *
     * @var boolean
     */
    private $displaycategories;

    /**
     * main constructor.
     * Initialize the user preferences
     *
     * @param string $grouping Grouping user preference
     * @param string $sort Sort user preference
     * @param string $view Display user preference
     */
    public function __construct($grouping, $sort, $view, $paging) {
        $this->grouping = $grouping ? $grouping : BLOCK_MYOVERVIEW_GROUPING_ALL;
        $this->sort = $sort ? $sort : BLOCK_MYOVERVIEW_SORTING_TITLE;
        $this->view = $view ? $view : BLOCK_MYOVERVIEW_VIEW_CARD;
        $this->paging = $paging ? $paging : BLOCK_MYOVERVIEW_PAGING_12;
        $config = get_config('block_myoverview');
        if (!$config->displaycategories) {
            $this->displaycategories = BLOCK_MYOVERVIEW_DISPLAY_CATEGORIES_OFF;
        } else {
            $this->displaycategories = BLOCK_MYOVERVIEW_DISPLAY_CATEGORIES_ON;
        }
    }

    /**
     * Get the user preferences as an array to figure out what has been selected
     *
     * @return array $preferences Array with the pref as key and value set to true
     */
    public function get_preferences_as_booleans() {
        $preferences = [];
        $preferences[$this->view] = true;
        $preferences[$this->sort] = true;
        $preferences[$this->grouping] = true;

        return $preferences;
    }

    /**
     * Export this data so it can be used as the context for a mustache template.
     *
     * @param \renderer_base $output
     * @return array Context variables for the template
     */
    public function export_for_template(renderer_base $output) {

        $nocoursesurl = $output->image_url('courses', 'block_myoverview')->out();

        $defaultvariables = [
            'nocoursesimg' => $nocoursesurl,
            'grouping' => $this->grouping,
            'sort' => $this->sort == BLOCK_MYOVERVIEW_SORTING_TITLE ? 'fullname' : 'ul.timeaccess desc',
            'view' => $this->view,
            'paging' => $this->paging,
            'displaycategories' => $this->displaycategories,
        ];

        $preferences = $this->get_preferences_as_booleans();
        return array_merge($defaultvariables, $preferences);

    }
}