David Monllao
148 lines
4.0 KiB
PHP
148 lines
4.0 KiB
PHP
<?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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* Representation of a prediction.
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*
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* @package core_analytics
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* @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
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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_analytics;
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defined('MOODLE_INTERNAL') || die();
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/**
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* Representation of a prediction.
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*
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* @package core_analytics
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* @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
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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 prediction {
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/**
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* @var \stdClass
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*/
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private $prediction;
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/**
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* @var array
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*/
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private $sampledata;
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/**
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* @var array
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*/
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private $calculations = array();
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/**
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* Constructor
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*
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* @param \stdClass $prediction
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* @param array $sampledata
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* @return void
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*/
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public function __construct($prediction, $sampledata) {
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global $DB;
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if (is_scalar($prediction)) {
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$prediction = $DB->get_record('analytics_predictions', array('id' => $prediction), '*', MUST_EXIST);
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}
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$this->prediction = $prediction;
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$this->sampledata = $sampledata;
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$this->format_calculations();
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}
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/**
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* Get prediction object data.
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*
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* @return \stdClass
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*/
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public function get_prediction_data() {
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return $this->prediction;
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}
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/**
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* Get prediction sample data.
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*
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* @return array
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*/
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public function get_sample_data() {
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return $this->sampledata;
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}
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/**
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* Gets the prediction calculations
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*
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* @return array
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*/
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public function get_calculations() {
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return $this->calculations;
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}
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/**
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* format_calculations
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*
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* @return \stdClass[]
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*/
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private function format_calculations() {
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$calculations = json_decode($this->prediction->calculations, true);
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foreach ($calculations as $featurename => $value) {
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list($indicatorclass, $subtype) = $this->parse_feature_name($featurename);
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if ($indicatorclass === 'range') {
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// Time range indicators don't belong to any indicator class, we don't store them.
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continue;
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} else if (!\core_analytics\manager::is_valid($indicatorclass, '\core_analytics\local\indicator\base')) {
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throw new \moodle_exception('errorpredictionformat', 'analytics');
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}
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$this->calculations[$featurename] = new \stdClass();
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$this->calculations[$featurename]->subtype = $subtype;
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$this->calculations[$featurename]->indicator = \core_analytics\manager::get_indicator($indicatorclass);
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$this->calculations[$featurename]->value = $value;
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}
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}
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/**
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* parse_feature_name
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*
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* @param string $featurename
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* @return string[]
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*/
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private function parse_feature_name($featurename) {
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$indicatorclass = $featurename;
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$subtype = false;
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// Some indicator result in more than 1 feature, we need to see which feature are we dealing with.
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$separatorpos = strpos($featurename, '/');
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if ($separatorpos !== false) {
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$subtype = substr($featurename, ($separatorpos + 1));
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$indicatorclass = substr($featurename, 0, $separatorpos);
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}
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return array($indicatorclass, $subtype);
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}
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}
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