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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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 * Moodle site analysable.
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 *
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 * @package   core_analytics
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 * @copyright 2016 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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 * Moodle site analysable.
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 *
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 * @package   core_analytics
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 * @copyright 2016 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 site implements \core_analytics\analysable {
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    /**
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     * @var int
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     */
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    protected $start;
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    /**
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     * @var int
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     */
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    protected $end;
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    /**
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     * Analysable id
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     *
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     * @return int
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     */
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    public function get_id() {
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        return SYSCONTEXTID;
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    }
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    /**
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     * Site.
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     *
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     * @return string
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     */
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    public function get_name() {
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        return get_string('site');
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    }
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    /**
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     * Analysable context.
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     *
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     * @return \context
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     */
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    public function get_context() {
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        return \context_system::instance();
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    }
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    /**
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     * Analysable start timestamp.
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     *
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     * @return int
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     */
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    public function get_start() {
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        if (!empty($this->start)) {
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            return $this->start;
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        }
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        // Much faster than reading the first log in the site.
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        $admins = get_admins();
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        $this->start = 9999999999;
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        foreach ($admins as $admin) {
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            if ($admin->firstaccess < $this->start) {
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                $this->start = $admin->firstaccess;
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            }
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        }
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        return $this->start;
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    }
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    /**
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     * Analysable end timestamp.
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     *
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     * @return int
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     */
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    public function get_end() {
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        if (!empty($this->end)) {
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            return $this->end;
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        }
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        $this->end = time();
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        return $this->end;
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    }
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}