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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Train system models with new data available.
 *
 * @package    tool_analytics
 * @copyright  2017 David Monllao {@link http://www.davidmonllao.com}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace tool_analytics\task;

defined('MOODLE_INTERNAL') || die();

/**
     * get_name
     *
     * @return string
     */
    public function get_name() {
        return get_string('trainmodels', 'tool_analytics');
    }

/**
     * Executes the prediction task.
     *
     * @return void
     */
    public function execute() {
        global $OUTPUT, $PAGE;

$models = \core_analytics\manager::get_all_models(true);
        if (!$models) {
            mtrace(get_string('errornoenabledmodels', 'tool_analytics'));
            return;
        }

foreach ($models as $model) {

if ($model->is_static()) {
                // Skip models based on assumptions.
                continue;
            }

if (!$model->get_time_splitting()) {
                // Can not train if there is no time splitting method selected.
                continue;
            }

$renderer = $PAGE->get_renderer('tool_analytics');

$result = $model->train();

// Reset the page as some indicators may call external functions that overwrite the page context.
            \tool_analytics\output\helper::reset_page();

if ($result) {
                echo $OUTPUT->heading(get_string('modelresults', 'tool_analytics', $model->get_name()));
                echo $renderer->render_get_predictions_results($result, $model->get_analyser()->get_logs());
            }
        }
    }
}