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. /** * Performance helper. * * @package core_competency * @copyright 2016 Frédéric Massart - FMCorz.net * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ namespace core_competency\external; defined('MOODLE_INTERNAL') || die(); use core_competency\competency; use core_competency\competency_framework; /** * Performance helper class. * * This tool keeps a local cache of certain items, which means that subsequent * calls to get the resource will not query the database. You will want to use * this when many resources could be shared and need to be queried in a loop. * * Note that some of these improvements can only be achieved by knowing the * logic deeper in other modules. For instance we know that a competency's context * is the one of its framework. This tool must be kept in sync with those APIs. * * @package core_competency * @copyright 2016 Frédéric Massart - FMCorz.net * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ class performance_helper { /** @var \context Cache of contexts by framework ID. */ protected $frameworkscontexts = []; /** @var competency_framework Cache of frameworks by framework ID. */ protected $frameworks = []; /** @var \grade_scale[] Cache of scales by scale ID. */ protected $scales = []; /** * Get the context of a competency. * * @param competency $competency The competency. * @return \context */ public function get_context_from_competency(competency $competency) { $frameworkid = $competency->get('competencyframeworkid'); if (!isset($this->frameworkscontexts[$frameworkid])) { $framework = $this->get_framework_from_competency($competency); $this->frameworkscontexts[$frameworkid] = $framework->get_context(); } return $this->frameworkscontexts[$frameworkid]; } /** * Get the framework of a competency. * * @param competency $competency The competency. * @return competency_framework */ public function get_framework_from_competency(competency $competency) { $frameworkid = $competency->get('competencyframeworkid'); if (!isset($this->frameworks[$frameworkid])) { $this->frameworks[$frameworkid] = $competency->get_framework(); } return $this->frameworks[$frameworkid]; } /** * Get the scale of a competency. * * /!\ Make sure that this is always kept in sync with: * - core_competency\competency::get_scale() * - core_competency\competency_framework::get_scale() * * @param competency $competency The competency. * @return \grade_scale */ public function get_scale_from_competency(competency $competency) { $scaleid = $competency->get('scaleid'); if ($scaleid !== null && !isset($this->scales[$scaleid])) { $this->scales[$scaleid] = $competency->get_scale(); } else if ($scaleid === null) { $framework = $this->get_framework_from_competency($competency); $scaleid = $framework->get('scaleid'); if (!isset($this->scales[$scaleid])) { $this->scales[$scaleid] = $framework->get_scale(); } } return $this->scales[$scaleid]; } /** * Ingest a framework to avoid additional fetching. * * @param competency_framework $framework The framework. * @return void */ public function ingest_framework(competency_framework $framework) { $id = $framework->get('id'); $this->frameworks[$id] = $framework; } }