Current Path : C:/xampp/htdocs/moodle/mod/quiz/classes/local/structure/ |
Current File : C:/xampp/htdocs/moodle/mod/quiz/classes/local/structure/slot_random.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/>. /** * Defines the \mod_quiz\local\structure\slot_random class. * * @package mod_quiz * @copyright 2018 Shamim Rezaie <shamim@moodle.com> * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ namespace mod_quiz\local\structure; defined('MOODLE_INTERNAL') || die(); /** * Class slot_random, represents a random question slot type. * * @package mod_quiz * @copyright 2018 Shamim Rezaie <shamim@moodle.com> * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ class slot_random { /** @var \stdClass Slot's properties. A record retrieved from the quiz_slots table. */ protected $record; /** * @var \stdClass The quiz this question slot belongs to. */ protected $quiz = null; /** * @var \core_tag_tag[] List of tags for this slot. */ protected $tags = []; /** * slot_random constructor. * * @param \stdClass $slotrecord Represents a record in the quiz_slots table. */ public function __construct($slotrecord = null) { $this->record = new \stdClass(); $properties = array( 'id', 'slot', 'quizid', 'page', 'requireprevious', 'questionid', 'questioncategoryid', 'includingsubcategories', 'maxmark'); foreach ($properties as $property) { if (isset($slotrecord->$property)) { $this->record->$property = $slotrecord->$property; } } } /** * Returns the quiz for this question slot. * The quiz is fetched the first time it is requested and then stored in a member variable to be returned each subsequent time. * * @return mixed * @throws \coding_exception */ public function get_quiz() { global $DB; if (empty($this->quiz)) { if (empty($this->record->quizid)) { throw new \coding_exception('quizid is not set.'); } $this->quiz = $DB->get_record('quiz', array('id' => $this->record->quizid)); } return $this->quiz; } /** * Sets the quiz object for the quiz slot. * It is not mandatory to set the quiz as the quiz slot can fetch it the first time it is accessed, * however it helps with the performance to set the quiz if you already have it. * * @param \stdClass $quiz The qui object. */ public function set_quiz($quiz) { $this->quiz = $quiz; $this->record->quizid = $quiz->id; } /** * Set some tags for this quiz slot. * * @param \core_tag_tag[] $tags */ public function set_tags($tags) { $this->tags = []; foreach ($tags as $tag) { // We use $tag->id as the key for the array so not only it handles duplicates of the same tag being given, // but also it is consistent with the behaviour of set_tags_by_id() below. $this->tags[$tag->id] = $tag; } } /** * Set some tags for this quiz slot. This function uses tag ids to find tags. * * @param int[] $tagids */ public function set_tags_by_id($tagids) { $this->tags = \core_tag_tag::get_bulk($tagids, 'id, name'); } /** * Inserts the quiz slot at the $page page. * It is required to call this function if you are building a quiz slot object from scratch. * * @param int $page The page that this slot will be inserted at. */ public function insert($page) { global $DB; $slots = $DB->get_records('quiz_slots', array('quizid' => $this->record->quizid), 'slot', 'id, slot, page'); $trans = $DB->start_delegated_transaction(); $maxpage = 1; $numonlastpage = 0; foreach ($slots as $slot) { if ($slot->page > $maxpage) { $maxpage = $slot->page; $numonlastpage = 1; } else { $numonlastpage += 1; } } if (is_int($page) && $page >= 1) { // Adding on a given page. $lastslotbefore = 0; foreach (array_reverse($slots) as $otherslot) { if ($otherslot->page > $page) { $DB->set_field('quiz_slots', 'slot', $otherslot->slot + 1, array('id' => $otherslot->id)); } else { $lastslotbefore = $otherslot->slot; break; } } $this->record->slot = $lastslotbefore + 1; $this->record->page = min($page, $maxpage + 1); quiz_update_section_firstslots($this->record->quizid, 1, max($lastslotbefore, 1)); } else { $lastslot = end($slots); $quiz = $this->get_quiz(); if ($lastslot) { $this->record->slot = $lastslot->slot + 1; } else { $this->record->slot = 1; } if ($quiz->questionsperpage && $numonlastpage >= $quiz->questionsperpage) { $this->record->page = $maxpage + 1; } else { $this->record->page = $maxpage; } } $this->record->id = $DB->insert_record('quiz_slots', $this->record); if (!empty($this->tags)) { $recordstoinsert = []; foreach ($this->tags as $tag) { $recordstoinsert[] = (object)[ 'slotid' => $this->record->id, 'tagid' => $tag->id, 'tagname' => $tag->name ]; } $DB->insert_records('quiz_slot_tags', $recordstoinsert); } $trans->allow_commit(); } }