<?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/>.

namespace mod_survey\output;

use moodle_url;
use renderable;
use renderer_base;
use templatable;
use url_select;

/**
 * Output the rendered elements for the tertiary nav page action
 *
 * @package mod_survey
 * @copyright 2021 Sujith Haridasan <sujith@moodle.com>
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class actionbar implements renderable, templatable {
    /**
     * The course id.
     *
     * @var int $id
     */
    private $id;

    /**
     * The action decides the url to navigate to.
     *
     * @var string $action
     */
    private $action;

    /**
     * Current url.
     *
     * @var moodle_url $currenturl
     */
    private $currenturl;

    /**
     * actionbar constructor.
     *
     * @param int $id The course module id.
     * @param string $action The action string.
     * @param moodle_url $currenturl The current URL.
     */
    public function __construct(int $id, string $action, moodle_url $currenturl) {
        $this->id = $id;
        $this->action = $action;
        $this->currenturl = $currenturl;
    }

    /**
     * Create select menu for the reports
     *
     * @return url_select url_select object.
     */
    private function create_select_menu(): url_select {
        $menu = [];
        $actions = $this->get_available_reports();

        foreach ($actions as $action => $straction) {
            $url = new moodle_url($this->currenturl, ['id' => $this->id, 'action' => $action]);
            $menu[$url->out(false)] = $straction;
        }
        return new url_select($menu, $this->currenturl->out(false), null, 'surveyresponseselect');
    }

    /**
     * Generate available reports list
     *
     * @return array The list of available action => action string.
     */
    private function get_available_reports(): array {
        global $DB;

        $cm = get_coursemodule_from_id('survey', $this->id);
        $survey = $DB->get_record("survey", ["id" => $cm->instance]);

        $actions = [];
        if ($survey && ($survey->template != SURVEY_CIQ)) {
            $actions['summary'] = get_string('summary', 'survey');
            $actions['scales'] = get_string('scales', 'survey');
        }
        $actions['questions'] = get_string('questions', 'survey');
        $actions['students'] = get_string('participants');

        return $actions;
    }

    /**
     * Data for the template.
     *
     * @param renderer_base $output renderer_base object.
     * @return array data for the template
     */
    public function export_for_template(renderer_base $output): array {
        global $PAGE;

        $selecturl = $this->create_select_menu();
        $data = [
            'urlselect' => $selecturl->export_for_template($output)
        ];

        if (has_capability('mod/survey:download', $PAGE->cm->context)) {
            $downloadlink = (new moodle_url('/mod/survey/report.php', ['id' => $this->id, 'action' => 'download']))->out(false);
            $data['download'] = [
                'link' => $downloadlink,
                'text' => get_string('downloadresults', 'mod_survey'),
            ];
        }
        return $data;
    }
}