course_summary_exporter.php

<?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 for exporting a course summary from an stdClass.
 *
 * @package    core_course
 * @copyright  2015 Damyon Wiese
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
namespace core_course\external;
defined('MOODLE_INTERNAL') || die();

use renderer_base;
use moodle_url;

/**
 * Class for exporting a course summary from an stdClass.
 *
 * @copyright  2015 Damyon Wiese
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class course_summary_exporter extends \core\external\exporter {

    /**
     * Constructor - saves the persistent object, and the related objects.
     *
     * @param mixed $data - Either an stdClass or an array of values.
     * @param array $related - An optional list of pre-loaded objects related to this object.
     */
    public function __construct($data, $related = array()) {
        if (!array_key_exists('isfavourite', $related)) {
            $related['isfavourite'] = false;
        }
        parent::__construct($data, $related);
    }

    protected static function define_related() {
        // We cache the context so it does not need to be retrieved from the course.
        return array('context' => '\\context', 'isfavourite' => 'bool?');
    }

    protected function get_other_values(renderer_base $output) {
        global $CFG;
        $courseimage = self::get_course_image($this->data);
        if (!$courseimage) {
            $courseimage = self::get_course_pattern($this->data);
        }
        $progress = self::get_course_progress($this->data);
        $hasprogress = false;
        if ($progress === 0 || $progress > 0) {
            $hasprogress = true;
        }
        $progress = floor($progress);
        $coursecategory = \core_course_category::get($this->data->category, MUST_EXIST, true);
        return array(
            'fullnamedisplay' => get_course_display_name_for_list($this->data),
            'viewurl' => (new moodle_url('/course/view.php', array('id' => $this->data->id)))->out(false),
            'courseimage' => $courseimage,
            'progress' => $progress,
            'hasprogress' => $hasprogress,
            'isfavourite' => $this->related['isfavourite'],
            'hidden' => boolval(get_user_preferences('block_myoverview_hidden_course_' . $this->data->id, 0)),
            'showshortname' => $CFG->courselistshortnames ? true : false,
            'coursecategory' => $coursecategory->name
        );
    }

    public static function define_properties() {
        return array(
            'id' => array(
                'type' => PARAM_INT,
            ),
            'fullname' => array(
                'type' => PARAM_TEXT,
            ),
            'shortname' => array(
                'type' => PARAM_TEXT,
            ),
            'idnumber' => array(
                'type' => PARAM_RAW,
            ),
            'summary' => array(
                'type' => PARAM_RAW,
                'null' => NULL_ALLOWED
            ),
            'summaryformat' => array(
                'type' => PARAM_INT,
            ),
            'startdate' => array(
                'type' => PARAM_INT,
            ),
            'enddate' => array(
                'type' => PARAM_INT,
            )
        );
    }

    /**
     * Get the formatting parameters for the summary.
     *
     * @return array
     */
    protected function get_format_parameters_for_summary() {
        return [
            'component' => 'course',
            'filearea' => 'summary',
        ];
    }

    public static function define_other_properties() {
        return array(
            'fullnamedisplay' => array(
                'type' => PARAM_TEXT,
            ),
            'viewurl' => array(
                'type' => PARAM_URL,
            ),
            'courseimage' => array(
                'type' => PARAM_RAW,
            ),
            'progress' => array(
                'type' => PARAM_INT,
                'optional' => true
            ),
            'hasprogress' => array(
                'type' => PARAM_BOOL
            ),
            'isfavourite' => array(
                'type' => PARAM_BOOL
            ),
            'hidden' => array(
                'type' => PARAM_BOOL
            ),
            'timeaccess' => array(
                'type' => PARAM_INT,
                'optional' => true
            ),
            'showshortname' => array(
                'type' => PARAM_BOOL
            ),
            'coursecategory' => array(
                'type' => PARAM_TEXT
            )
        );
    }

    /**
     * Get the course image if added to course.
     *
     * @param object $course
     * @return string url of course image
     */
    public static function get_course_image($course) {
        global $CFG;
        $courseinlist = new \core_course_list_element($course);
        foreach ($courseinlist->get_course_overviewfiles() as $file) {
            if ($file->is_valid_image()) {
                $pathcomponents = [
                    '/pluginfile.php',
                    $file->get_contextid(),
                    $file->get_component(),
                    $file->get_filearea() . $file->get_filepath() . $file->get_filename()
                ];
                $path = implode('/', $pathcomponents);
                return (new moodle_url($path))->out();
            }
        }
        return false;
    }

    /**
     * Get the course pattern datauri.
     *
     * The datauri is an encoded svg that can be passed as a url.
     * @param object $course
     * @return string datauri
     */
    public static function get_course_pattern($course) {
        $color = self::coursecolor($course->id);
        $pattern = new \core_geopattern();
        $pattern->setColor($color);
        $pattern->patternbyid($course->id);
        return $pattern->datauri();
    }

    /**
     * Get the course progress percentage.
     *
     * @param object $course
     * @return int progress
     */
    public static function get_course_progress($course) {
        return \core_completion\progress::get_course_progress_percentage($course);
    }

    /**
     * Get the course color.
     *
     * @param int $courseid
     * @return string hex color code.
     */
    public static function coursecolor($courseid) {
        // The colour palette is hardcoded for now. It would make sense to combine it with theme settings.
        $basecolors = ['#81ecec', '#74b9ff', '#a29bfe', '#dfe6e9', '#00b894',
            '#0984e3', '#b2bec3', '#fdcb6e', '#fd79a8', '#6c5ce7'];

        $color = $basecolors[$courseid % 10];
        return $color;
    }
}