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📄 fetch.php(7.73 KB)
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Editing: fetch.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/>.

/**
 * Web service functions relating to point grades and grading.
 *
 * @package    core_grades
 * @copyright  2019 Andrew Nicols <andrew@nicols.co.uk>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

declare(strict_types = 1);

namespace core_grades\grades\grader\gradingpanel\point\external;

use coding_exception;
use context;
use core_grades\component_gradeitem as gradeitem;
use core_grades\component_gradeitems;
use core_external\external_api;
use core_external\external_function_parameters;
use core_external\external_single_structure;
use core_external\external_value;
use core_external\external_warnings;
use moodle_exception;
use stdClass;

/**
 * External grading panel point API
 *
 * @package    core_grades
 * @copyright  2019 Andrew Nicols <andrew@nicols.co.uk>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class fetch extends external_api {

/**
     * Describes the parameters for fetching the grading panel for a simple grade.
     *
     * @return external_function_parameters
     * @since Moodle 3.8
     */
    public static function execute_parameters(): external_function_parameters {
        return new external_function_parameters ([
            'component' => new external_value(
                PARAM_ALPHANUMEXT,
                'The name of the component',
                VALUE_REQUIRED
            ),
            'contextid' => new external_value(
                PARAM_INT,
                'The ID of the context being graded',
                VALUE_REQUIRED
            ),
            'itemname' => new external_value(
                PARAM_ALPHANUM,
                'The grade item itemname being graded',
                VALUE_REQUIRED
            ),
            'gradeduserid' => new external_value(
                PARAM_INT,
                'The ID of the user show',
                VALUE_REQUIRED
            ),
        ]);
    }

/**
     * Fetch the data required to build a grading panel for a simple grade.
     *
     * @param string $component
     * @param int $contextid
     * @param string $itemname
     * @param int $gradeduserid
     * @return array
     * @throws \dml_exception
     * @throws \invalid_parameter_exception
     * @throws \restricted_context_exception
     * @throws coding_exception
     * @throws moodle_exception
     * @since Moodle 3.8
     */
    public static function execute(string $component, int $contextid, string $itemname, int $gradeduserid): array {
        global $USER, $CFG;
        require_once("{$CFG->libdir}/gradelib.php");
        [
            'component' => $component,
            'contextid' => $contextid,
            'itemname' => $itemname,
            'gradeduserid' => $gradeduserid,
        ] = self::validate_parameters(self::execute_parameters(), [
            'component' => $component,
            'contextid' => $contextid,
            'itemname' => $itemname,
            'gradeduserid' => $gradeduserid,
        ]);

// Validate the context.
        $context = context::instance_by_id($contextid);
        self::validate_context($context);

// Validate that the supplied itemname is a gradable item.
        if (!component_gradeitems::is_valid_itemname($component, $itemname)) {
            throw new coding_exception("The '{$itemname}' item is not valid for the '{$component}' component");
        }

// Fetch the gradeitem instance.
        $gradeitem = gradeitem::instance($component, $context, $itemname);

if (!$gradeitem->is_using_direct_grading()) {
            throw new moodle_exception("The {$itemname} item in {$component}/{$contextid} is not configured for direct grading");
        }

// Fetch the actual data.
        $gradeduser = \core_user::get_user($gradeduserid, '*', MUST_EXIST);

// One can access its own grades. Others just if they're graders.
        if ($gradeduserid != $USER->id) {
            $gradeitem->require_user_can_grade($gradeduser, $USER);
        }

$hasgrade = $gradeitem->user_has_grade($gradeduser);
        $grade = $gradeitem->get_formatted_grade_for_user($gradeduser, $USER);
        $isgrading = $gradeitem->user_can_grade($gradeduser, $USER);

// Set up some items we need to return on other interfaces.
        $gradegrade = \grade_grade::fetch(['itemid' => $gradeitem->get_grade_item()->id, 'userid' => $gradeduser->id]);
        $gradername = $gradegrade ? fullname(\core_user::get_user($gradegrade->usermodified)) : null;

return self::get_fetch_data($grade, $hasgrade, $gradeitem, $gradername, $isgrading);
    }

/**
     * Get the data to be fetched.
     *
     * @param stdClass $grade
     * @param bool $hasgrade
     * @param gradeitem $gradeitem
     * @param string|null $gradername
     * @param bool $isgrading
     * @return array
     */
    public static function get_fetch_data(
        stdClass $grade,
        bool $hasgrade,
        gradeitem $gradeitem,
        ?string $gradername,
        bool $isgrading = false
    ): array {
        $templatename = 'core_grades/grades/grader/gradingpanel/point';

// We do not want to display anything if we are showing the grade as a letter. For example the 'Grade' might
        // read 'B-'. We do not want to show the user the actual point they were given. See MDL-71439.
        if (($gradeitem->get_grade_item()->get_displaytype() == GRADE_DISPLAY_TYPE_LETTER) && !$isgrading) {
            $templatename = 'core_grades/grades/grader/gradingpanel/point_blank';
        }

return [
            'templatename' => $templatename,
            'hasgrade' => $hasgrade,
            'grade' => [
                'grade' => $grade->grade,
                'usergrade' => $grade->usergrade,
                'maxgrade' => (int) $grade->maxgrade,
                'gradedby' => $gradername,
                'timecreated' => $grade->timecreated,
                'timemodified' => $grade->timemodified,
            ],
            'warnings' => [],
        ];
    }

/**
     * Describes the data returned from the external function.
     *
     * @return external_single_structure
     * @since Moodle 3.8
     */
    public static function execute_returns(): external_single_structure {
        return new external_single_structure([
            'templatename' => new external_value(PARAM_SAFEPATH, 'The template to use when rendering this data'),
            'hasgrade' => new external_value(PARAM_BOOL, 'Does the user have a grade?'),
            'grade' => new external_single_structure([
                'grade' => new external_value(PARAM_FLOAT, 'The numeric grade'),
                'usergrade' => new external_value(PARAM_RAW, 'Current user grade'),
                'maxgrade' => new external_value(PARAM_RAW, 'Max possible grade'),
                'gradedby' => new external_value(PARAM_RAW, 'The assumed grader of this grading instance'),
                'timecreated' => new external_value(PARAM_INT, 'The time that the grade was created'),
                'timemodified' => new external_value(PARAM_INT, 'The time that the grade was last updated'),
            ]),
            'warnings' => new external_warnings(),
        ]);
    }
}

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