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1441 ariadna 1 
<?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 customfield_number;
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use customfield_number\local\numberproviders\nofactivities;
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use customfield_number\task\recalculate;
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/**
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 * Event observers for customfield_number
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 *
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 * @package    customfield_number
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 * @copyright  Marina Glancy
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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 observer {
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    /**
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     * When a 'number' custom field was created, schedule recalculation for the field data
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     *
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     * @param \core_customfield\event\field_created $event
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     */
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    public static function field_created(\core_customfield\event\field_created $event): void {
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        $field = $event->get_record_snapshot('customfield_field', $event->objectid);
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        if ($field->type === 'number') {
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            recalculate::schedule_for_field($event->objectid);
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        }
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    }
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    /**
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     * When a 'number' custom field was updated, schedule recalculation for the field data
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     *
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     * @param \core_customfield\event\field_updated $event
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     */
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    public static function field_updated(\core_customfield\event\field_updated $event): void {
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        $field = $event->get_record_snapshot('customfield_field', $event->objectid);
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        if ($field->type === 'number') {
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            recalculate::schedule_for_field($event->objectid);
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        }
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    }
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    /**
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     * When a course module was created, schedule recalculation for all 'nofactivities' custom fields
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     *
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     * @param \core\event\course_module_created $event
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     */
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    public static function course_module_created(\core\event\course_module_created $event): void {
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        if (self::has_nofactivities_fields()) {
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            recalculate::schedule_for_fieldtype(fieldtype: nofactivities::class,
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                component: 'core_course', area: 'course', instanceid: $event->courseid);
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        }
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    }
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    /**
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     * When a course module was deleted, schedule recalculation for all 'nofactivities' custom fields
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     *
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     * @param \core\event\course_module_deleted $event
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     */
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    public static function course_module_deleted(\core\event\course_module_deleted $event): void {
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        if (self::has_nofactivities_fields()) {
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            recalculate::schedule_for_fieldtype(fieldtype: nofactivities::class,
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                component: 'core_course', area: 'course', instanceid: $event->courseid);
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        }
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    }
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    /**
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     * When a course module was updated, schedule recalculation for all 'nofactivities' custom fields
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     *
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     * Module visibility may change following an 'updated' event and it will affect the activities count
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     *
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     * @param \core\event\course_module_updated $event
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     */
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    public static function course_module_updated(\core\event\course_module_updated $event): void {
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        if (self::has_nofactivities_fields()) {
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            recalculate::schedule_for_fieldtype(fieldtype: nofactivities::class,
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                component: 'core_course', area: 'course', instanceid: $event->courseid);
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        }
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    }
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    /**
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     * Checks if a 'number' field with 'nofactivities' provider exists in the course fields
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     *
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     * This method is very fast, it only performs one DB query and only once per request
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     *
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     * @return bool
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     */
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    protected static function has_nofactivities_fields(): bool {
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        $handler = \core_course\customfield\course_handler::create();
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        foreach ($handler->get_categories_with_fields() as $category) {
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            foreach ($category->get_fields() as $field) {
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                if ($field->get('type') === 'number' &&
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                        $field->get_configdata_property('fieldtype') === nofactivities::class) {
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                    return true;
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                }
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            }
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        }
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        return false;
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    }
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}