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123 lines
4.2 KiB
123 lines
4.2 KiB
<?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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* Performance helper.
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*
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* @package core_competency
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* @copyright 2016 Frédéric Massart - FMCorz.net
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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 core_competency\external;
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defined('MOODLE_INTERNAL') || die();
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use core_competency\competency;
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use core_competency\competency_framework;
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/**
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* Performance helper class.
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*
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* This tool keeps a local cache of certain items, which means that subsequent
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* calls to get the resource will not query the database. You will want to use
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* this when many resources could be shared and need to be queried in a loop.
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*
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* Note that some of these improvements can only be achieved by knowing the
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* logic deeper in other modules. For instance we know that a competency's context
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* is the one of its framework. This tool must be kept in sync with those APIs.
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*
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* @package core_competency
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* @copyright 2016 Frédéric Massart - FMCorz.net
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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 performance_helper {
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/** @var \context Cache of contexts by framework ID. */
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protected $frameworkscontexts = [];
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/** @var competency_framework Cache of frameworks by framework ID. */
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protected $frameworks = [];
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/** @var \grade_scale[] Cache of scales by scale ID. */
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protected $scales = [];
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/**
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* Get the context of a competency.
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*
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* @param competency $competency The competency.
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* @return \context
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*/
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public function get_context_from_competency(competency $competency) {
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$frameworkid = $competency->get('competencyframeworkid');
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if (!isset($this->frameworkscontexts[$frameworkid])) {
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$framework = $this->get_framework_from_competency($competency);
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$this->frameworkscontexts[$frameworkid] = $framework->get_context();
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}
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return $this->frameworkscontexts[$frameworkid];
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}
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/**
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* Get the framework of a competency.
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*
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* @param competency $competency The competency.
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* @return competency_framework
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*/
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public function get_framework_from_competency(competency $competency) {
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$frameworkid = $competency->get('competencyframeworkid');
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if (!isset($this->frameworks[$frameworkid])) {
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$this->frameworks[$frameworkid] = $competency->get_framework();
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}
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return $this->frameworks[$frameworkid];
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}
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/**
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* Get the scale of a competency.
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*
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* /!\ Make sure that this is always kept in sync with:
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* - core_competency\competency::get_scale()
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* - core_competency\competency_framework::get_scale()
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*
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* @param competency $competency The competency.
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* @return \grade_scale
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*/
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public function get_scale_from_competency(competency $competency) {
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$scaleid = $competency->get('scaleid');
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if ($scaleid !== null && !isset($this->scales[$scaleid])) {
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$this->scales[$scaleid] = $competency->get_scale();
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} else if ($scaleid === null) {
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$framework = $this->get_framework_from_competency($competency);
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$scaleid = $framework->get('scaleid');
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if (!isset($this->scales[$scaleid])) {
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$this->scales[$scaleid] = $framework->get_scale();
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}
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}
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return $this->scales[$scaleid];
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}
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/**
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* Ingest a framework to avoid additional fetching.
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*
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* @param competency_framework $framework The framework.
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* @return void
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*/
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public function ingest_framework(competency_framework $framework) {
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$id = $framework->get('id');
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$this->frameworks[$id] = $framework;
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}
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}
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