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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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/**
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* Priority Queue class to sort out db entry contents.
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*
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* @package mod_data
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* @copyright 2016 Devang Gaur
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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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namespace mod_data\search;
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defined('MOODLE_INTERNAL') || die();
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/**
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* Priority Queue class to sort out db entry contents.
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*
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* @package mod_data
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* @copyright 2016 Devang Gaur
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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 sortedcontentqueue extends \SPLPriorityQueue {
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/**
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* @var array All contents that will be sorted.
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*/
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private $contents;
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/**
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* contructor
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*
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* @param array $contents
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* @return void
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*/
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public function __construct($contents) {
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$this->contents = $contents;
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}
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/**
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* comparator function overriden for sorting the records
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* ...as per 'required' and 'priotirity' field values
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*
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* @param int $key1
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* @param int $key2
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* @return int
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*/
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public function compare($key1 , $key2): int {
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$record1 = $this->contents[$key1];
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$record2 = $this->contents[$key2];
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// If a content's fieldtype is compulsory in the database than it would have priority than any other noncompulsory content.
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if ( ($record1->required && $record2->required) || (!$record1->required && !$record2->required)) {
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if ($record1->priority === $record2->priority) {
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return $key1 < $key2 ? 1 : -1;
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}
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return $record1->priority < $record2->priority ? -1 : 1;
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} else if ($record1->required && !$record2->required) {
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return 1;
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} else {
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return -1;
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}
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}
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}
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