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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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namespace gradereport_singleview\external;
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use context_course;
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use core_course_external;
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use core_external\external_function_parameters;
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use core_external\external_multiple_structure;
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use core_external\external_single_structure;
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use core_external\external_value;
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use core_external\external_warnings;
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use grade_tree;
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defined('MOODLE_INTERNAL') || die;
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require_once($CFG->dirroot.'/course/externallib.php');
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require_once($CFG->dirroot.'/grade/lib.php');
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/**
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 * External grade report singleview API
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 *
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 * @package    gradereport_singleview
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 * @copyright  2022 Mathew May <mathew.solutions>
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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class singleview extends core_course_external {
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    /**
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     * Describes the parameters for get_users_for_course.
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     *
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     * @return external_function_parameters
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     */
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    public static function get_grade_items_for_search_widget_parameters(): external_function_parameters {
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        return new external_function_parameters (
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            [
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                'courseid' => new external_value(PARAM_INT, 'Course Id', VALUE_REQUIRED)
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            ]
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        );
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    }
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    /**
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     * Given a course ID find the
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     *
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     * @param int $courseid
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     * @return array Users and warnings to pass back to the calling widget.
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     * @throws coding_exception
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     * @throws invalid_parameter_exception
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     * @throws moodle_exception
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     * @throws restricted_context_exception
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     */
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    protected static function get_grade_items_for_search_widget(int $courseid): array {
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        global $PAGE, $USER, $CFG;
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        $params = self::validate_parameters(
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            self::get_grade_items_for_search_widget_parameters(),
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            [
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                'courseid' => $courseid,
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            ]
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        );
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        $warnings = [];
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        $coursecontext = context_course::instance($params['courseid']);
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        parent::validate_context($coursecontext);
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        $gtree = new grade_tree($params['courseid'], false, true, null, !$CFG->enableoutcomes);
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        $gradeableitems = $gtree->get_items();
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        $gradeitems = array_map(function ($gradeitem) use ($PAGE, $USER, $params) {
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            $item = new \stdClass();
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            $item->id = $gradeitem->id;
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            $item->name = $gradeitem->get_name(true);
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            return $item;
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        }, $gradeableitems);
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        return [
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            'gradeitems' => $gradeitems,
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            'warnings' => $warnings,
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        ];
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    }
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    /**
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     * Returns description of what the user search for the widget should return.
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     *
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     * @return external_single_structure
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     */
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    public static function get_grade_items_for_search_widget_returns(): external_single_structure {
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        return new external_single_structure([
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            'gradeitems' => new external_multiple_structure(
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                new external_single_structure([
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                    'id'    => new external_value(PARAM_INT, 'ID of the grade item', VALUE_OPTIONAL),
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                    'name' => new external_value(PARAM_TEXT, 'The full name of the grade item', VALUE_OPTIONAL)
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                ])
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            ),
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            'warnings' => new external_warnings(),
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        ]);
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    }
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}