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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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 * Test analyser
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 *
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 * @package   core
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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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defined('MOODLE_INTERNAL') || die();
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/**
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 * Test analyser
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 *
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 * @package   core
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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 test_site_users_analyser extends \core_analytics\local\analyser\sitewide {
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    /**
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     * Samples origin is course table.
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     *
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     * @return string
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     */
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    public function get_samples_origin() {
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        return 'user';
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    }
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    /**
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     * Returns the sample analysable
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     *
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     * @param int $sampleid
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     * @return \core_analytics\analysable
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     */
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    public function get_sample_analysable($sampleid) {
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        return new \core_analytics\site();
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    }
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    /**
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     * Data this analyer samples provide.
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     *
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     * @return string[]
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     */
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    protected function provided_sample_data() {
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        return array('user');
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    }
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    /**
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     * Returns the sample context.
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     *
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     * @param int $sampleid
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     * @return \context
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     */
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    public function sample_access_context($sampleid) {
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        return \context_system::instance();
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    }
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    /**
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     * Returns all site courses.
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     *
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     * @param \core_analytics\analysable $site
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     * @return array
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     */
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    public function get_all_samples(\core_analytics\analysable $site) {
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        global $DB;
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        $users = $DB->get_records('user');
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        $userids = array_keys($users);
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        $sampleids = array_combine($userids, $userids);
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        $users = array_map(function($user) {
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            return array('user' => $user);
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        }, $users);
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        return array($sampleids, $users);
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    }
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    /**
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     * Return all complete samples data from sample ids.
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     *
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     * @param int[] $sampleids
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     * @return array
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     */
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    public function get_samples($sampleids) {
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        global $DB;
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        list($userssql, $params) = $DB->get_in_or_equal($sampleids, SQL_PARAMS_NAMED);
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        $users = $DB->get_records_select('user', "id {$userssql}", $params);
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        $userids = array_keys($users);
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        $sampleids = array_combine($userids, $userids);
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        $users = array_map(function($user) {
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            return array('user' => $user);
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        }, $users);
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        return array($sampleids, $users);
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    }
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    /**
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     * Returns the description of a sample.
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     *
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     * @param int $sampleid
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     * @param int $contextid
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     * @param array $sampledata
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     * @return array array(string, \renderable)
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     */
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    public function sample_description($sampleid, $contextid, $sampledata) {
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        $description = fullname($sampledata['user']);
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        $userimage = new \pix_icon('i/user', get_string('user'));
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        return array($description, $userimage);
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    }
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    /**
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     * We need to delete associated data if a user requests his data to be deleted.
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     *
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     * @return bool
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     */
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    public function processes_user_data() {
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        return true;
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    }
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    /**
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     * Join the samples origin table with the user id table.
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     *
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     * @param string $sampletablealias
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     * @return string
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     */
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    public function join_sample_user($sampletablealias) {
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        return "JOIN {user} u ON u.id = {$sampletablealias}.sampleid";
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    }
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}