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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/>.

/**
 * Unit tests for prediction actions.
 *
 * @package   core_analytics
 * @copyright 2017 David Monllaó {@link http://www.davidmonllao.com}
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

require_once(__DIR__ . '/fixtures/test_indicator_max.php');
require_once(__DIR__ . '/fixtures/test_target_shortname.php');

/**
     * Common startup tasks
     */
    public function setUp() {
        global $DB;

$this->setAdminUser();
        $target = \core_analytics\manager::get_target('test_target_shortname');
        $indicators = array('test_indicator_max');
        foreach ($indicators as $key => $indicator) {
            $indicators[$key] = \core_analytics\manager::get_indicator($indicator);
        }

$this->model = \core_analytics\model::create($target, $indicators);
        $this->modelobj = $this->model->get_model_obj();
        $this->model->enable('\core\analytics\time_splitting\single_range');

$this->resetAfterTest(true);

$course1 = $this->getDataGenerator()->create_course();
        $course2 = $this->getDataGenerator()->create_course();
        $this->context = \context_course::instance($course1->id);

$this->teacher1 = $this->getDataGenerator()->create_user();
        $this->teacher2 = $this->getDataGenerator()->create_user();

$this->getDataGenerator()->enrol_user($this->teacher1->id, $course1->id, 'editingteacher');
        $this->getDataGenerator()->enrol_user($this->teacher2->id, $course1->id, 'editingteacher');

// The only relevant fields are modelid, contextid and sampleid. I'm cheating and setting
        // contextid as the course context so teachers can access these predictions.
        $pred = new \stdClass();
        $pred->modelid = $this->model->get_id();
        $pred->contextid = $this->context->id;
        $pred->sampleid = $course1->id;
        $pred->rangeindex = 1;
        $pred->prediction = 1;
        $pred->predictionscore = 1;
        $pred->calculations = json_encode(array('test_indicator_max' => 1));
        $pred->timecreated = time();
        $DB->insert_record('analytics_predictions', $pred);

$pred->sampleid = $course2->id;
        $DB->insert_record('analytics_predictions', $pred);
    }

/**
     * test_get_predictions
     */
    public function test_action_executed() {
        global $DB;

$this->assertEquals(0, $DB->count_records('analytics_prediction_actions'));

// Teacher 2 flags a prediction (it doesn't matter which one) as fixed.
        $this->setUser($this->teacher2);
        list($ignored, $predictions) = $this->model->get_predictions($this->context, true);
        $prediction = reset($predictions);
        $prediction->action_executed(\core_analytics\prediction::ACTION_FIXED, $this->model->get_target());

$this->assertEquals(1, $DB->count_records('analytics_prediction_actions'));
        $action = $DB->get_record('analytics_prediction_actions', array('userid' => $this->teacher2->id));
        $this->assertEquals(\core_analytics\prediction::ACTION_FIXED, $action->actionname);

$prediction->action_executed(\core_analytics\prediction::ACTION_NOT_USEFUL, $this->model->get_target());
        $this->assertEquals(2, $DB->count_records('analytics_prediction_actions'));
    }

/**
     * test_get_predictions
     */
    public function test_get_predictions() {

// Already logged in as admin.
        list($ignored, $predictions) = $this->model->get_predictions($this->context, true);
        $this->assertCount(2, $predictions);

$this->setUser($this->teacher1);
        list($ignored, $predictions) = $this->model->get_predictions($this->context, true);
        $this->assertCount(2, $predictions);

$this->setUser($this->teacher2);
        list($ignored, $predictions) = $this->model->get_predictions($this->context, false);
        $this->assertCount(2, $predictions);

// Teacher 2 flags a prediction (it doesn't matter which one) as fixed.
        $prediction = reset($predictions);
        $prediction->action_executed(\core_analytics\prediction::ACTION_FIXED, $this->model->get_target());

list($ignored, $predictions) = $this->model->get_predictions($this->context, true);
        $this->assertCount(1, $predictions);
        list($ignored, $predictions) = $this->model->get_predictions($this->context, false);
        $this->assertCount(2, $predictions);

// Teacher 1 can still see both predictions.
        $this->setUser($this->teacher1);
        list($ignored, $predictions) = $this->model->get_predictions($this->context, true);
        $this->assertCount(2, $predictions);
        list($ignored, $predictions) = $this->model->get_predictions($this->context, false);
        $this->assertCount(2, $predictions);
    }
}