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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/>.

/**
 * Privacy provider tests.
 *
 * @package     mod_glossary
 * @copyright   2018 Simey Lameze <simey@moodle.com>
 * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

use core_privacy\local\metadata\collection;
use core_privacy\local\request\deletion_criteria;
use mod_glossary\privacy\provider;

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

global $CFG;
require_once($CFG->dirroot . '/comment/lib.php');
require_once($CFG->dirroot . '/rating/lib.php');

/**
 * Privacy provider tests class.
 *
 * @package    mod_glossary
 * @copyright 2018 Simey Lameze <simey@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class mod_glossary_privacy_provider_testcase extends \core_privacy\tests\provider_testcase {
    /** @var stdClass The student object. */
    protected $student;

/** @var stdClass The teacher object. */
    protected $teacher;

/** @var stdClass The glossary object. */
    protected $glossary;

/** @var stdClass The course object. */
    protected $course;

/** @var stdClass The plugin generator object. */
    protected $plugingenerator;

/**
     * {@inheritdoc}
     */
    protected function setUp() {
        $this->resetAfterTest();

global $DB;
        $generator = $this->getDataGenerator();
        $course = $generator->create_course();
        $this->course = $course;

$this->plugingenerator = $generator->get_plugin_generator('mod_glossary');

// The glossary activity the user will answer.
        $glossary = $this->plugingenerator->create_instance(['course' => $course->id]);
        $this->glossary = $glossary;

$cm = get_coursemodule_from_instance('glossary', $glossary->id);
        $context = context_module::instance($cm->id);

// Create a student which will add an entry to a glossary.
        $student = $generator->create_user();
        $generator->enrol_user($student->id,  $course->id, 'student');
        $this->student = $student;

$teacher = $generator->create_user();
        $generator->enrol_user($teacher->id,  $course->id, 'editingteacher');
        $this->teacher = $teacher;

$this->setUser($student->id);
        $ge1 = $this->plugingenerator->create_content($glossary, ['concept' => 'first', 'approved' => 1], ['one']);

// Student create a comment on a glossary entry.
        $this->setUser($student);
        $comment = $this->get_comment_object($context, $ge1->id);
        $comment->add('Hello, it\'s me!');

// Attach tags.
        core_tag_tag::set_item_tags('mod_glossary', 'glossary_entries', $ge1->id, $context, ['Beer', 'Golf']);
    }

/**
     * Test for provider::get_metadata().
     */
    public function test_get_metadata() {
        $collection = new collection('mod_glossary');
        $newcollection = provider::get_metadata($collection);
        $itemcollection = $newcollection->get_collection();
        $this->assertCount(5, $itemcollection);

$table = reset($itemcollection);
        $this->assertEquals('glossary_entries', $table->get_name());

$privacyfields = $table->get_privacy_fields();
        $this->assertArrayHasKey('glossaryid', $privacyfields);
        $this->assertArrayHasKey('concept', $privacyfields);
        $this->assertArrayHasKey('definition', $privacyfields);
        $this->assertArrayHasKey('attachment', $privacyfields);
        $this->assertArrayHasKey('userid', $privacyfields);
        $this->assertArrayHasKey('timemodified', $privacyfields);

$this->assertEquals('privacy:metadata:glossary_entries', $table->get_summary());
    }

/**
     * Test for provider::get_contexts_for_userid().
     */
    public function test_get_contexts_for_userid() {
        $cm = get_coursemodule_from_instance('glossary', $this->glossary->id);

$contextlist = provider::get_contexts_for_userid($this->student->id);
        $this->assertCount(1, $contextlist);
        $contextforuser = $contextlist->current();
        $cmcontext = context_module::instance($cm->id);
        $this->assertEquals($cmcontext->id, $contextforuser->id);
    }

/**
     * Test for provider::get_users_in_context().
     */
    public function test_get_users_in_context() {
        $component = 'mod_glossary';
        $cm = get_coursemodule_from_instance('glossary', $this->glossary->id);
        $cmcontext = context_module::instance($cm->id);

$userlist = new \core_privacy\local\request\userlist($cmcontext, $component);
        provider::get_users_in_context($userlist);

$this->assertCount(1, $userlist);

$expected = [$this->student->id];
        $actual = $userlist->get_userids();
        sort($expected);
        sort($actual);

$this->assertEquals($expected, $actual);
    }

/**
     * Test for provider::export_user_data().
     */
    public function test_export_for_context() {
        $cm = get_coursemodule_from_instance('glossary', $this->glossary->id);
        $cmcontext = context_module::instance($cm->id);

// Export all of the data for the context.
        $writer = \core_privacy\local\request\writer::with_context($cmcontext);
        $contextlist = new \core_privacy\local\request\approved_contextlist($this->student, 'mod_glossary' , [$cmcontext->id]);

\mod_glossary\privacy\provider::export_user_data($contextlist);
        $this->assertTrue($writer->has_any_data());
        $data = $writer->get_data([]);

$this->assertEquals('Glossary 1', $data->name);
        $this->assertEquals('first', $data->entries[0]['concept']);
    }

/**
     * Test for provider::delete_data_for_all_users_in_context().
     */
    public function test_delete_data_for_all_users_in_context() {
        global $DB;

$generator = $this->getDataGenerator();
        $cm = get_coursemodule_from_instance('glossary', $this->glossary->id);
        $context = context_module::instance($cm->id);
        // Create another student who will add an entry the glossary activity.
        $student2 = $generator->create_user();
        $generator->enrol_user($student2->id, $this->course->id, 'student');

$this->setUser($student2);
        $ge3 = $this->plugingenerator->create_content($this->glossary, ['concept' => 'first', 'approved' => 1], ['three']);
        $comment = $this->get_comment_object($context, $ge3->id);
        $comment->add('User 2 comment');

$this->plugingenerator->create_category($this->glossary, ['cat1'], [$ge3]);
        $count = $DB->count_records('glossary_entries_categories', ['entryid' => $ge3->id]);
        $this->assertEquals(1, $count);
        core_tag_tag::set_item_tags('mod_glossary', 'glossary_entries', $ge3->id, $context, ['Pizza', 'Noodles']);

// As a teacher, rate student 2 entry.
        $this->setUser($this->teacher);
        $rating = $this->get_rating_object($context, $ge3->id);
        $rating->update_rating(2);

// Before deletion, we should have 2 entries.
        $count = $DB->count_records('glossary_entries', ['glossaryid' => $this->glossary->id]);
        $this->assertEquals(2, $count);
        $aliascount = $DB->count_records('glossary_alias');
        $this->assertEquals(2, $aliascount);
        // Delete data based on context.
        provider::delete_data_for_all_users_in_context($context);

// After deletion, the glossary entries and aliases for that glossary activity should have been deleted.
        $count = $DB->count_records('glossary_entries', ['glossaryid' => $this->glossary->id]);
        $this->assertEquals(0, $count);
        $this->assertEquals(0, $DB->count_records('glossary_alias'));
        $count = $DB->count_records('glossary_entries_categories', ['entryid' => $ge3->id]);
        $this->assertEquals(0, $count);
        $tagcount = $DB->count_records('tag_instance', ['component' => 'mod_glossary', 'itemtype' => 'glossary_entries',
            'itemid' => $ge3->id]);
        $this->assertEquals(0, $tagcount);

$ratingcount = $DB->count_records('rating', ['component' => 'mod_glossary', 'ratingarea' => 'entry',
            'itemid' => $ge3->id]);
        $this->assertEquals(0, $ratingcount);
    }

/**
     * Test for provider::delete_data_for_user().
     */
    public function test_delete_data_for_user() {
        global $DB;
        $generator = $this->getDataGenerator();

// Create another student who will add an entry to the first glossary.
        $student2 = $generator->create_user();
        $generator->enrol_user($student2->id, $this->course->id, 'student');

$cm1 = get_coursemodule_from_instance('glossary', $this->glossary->id);
        $glossary2 = $this->plugingenerator->create_instance(['course' => $this->course->id]);
        $cm2 = get_coursemodule_from_instance('glossary', $glossary2->id);

$ge1 = $this->plugingenerator->create_content($this->glossary, ['concept' => 'first user glossary entry', 'approved' => 1]);
        $this->plugingenerator->create_content($glossary2, ['concept' => 'first user second glossary entry', 'approved' => 1]);

$context1 = context_module::instance($cm1->id);
        $context2 = context_module::instance($cm2->id);
        core_tag_tag::set_item_tags('mod_glossary', 'glossary_entries', $ge1->id, $context1, ['Parmi', 'Sushi']);

$this->setUser($student2);
        $ge3 = $this->plugingenerator->create_content($this->glossary, ['concept' => 'second user glossary entry',
                'approved' => 1], ['three']);

$comment = $this->get_comment_object($context1, $ge3->id);
        $comment->add('User 2 comment');

core_tag_tag::set_item_tags('mod_glossary', 'glossary_entries', $ge3->id, $context1, ['Pizza', 'Noodles']);

// As a teacher, rate student 2's entry.
        $this->setUser($this->teacher);
        $rating = $this->get_rating_object($context1, $ge3->id);
        $rating->update_rating(2);

// Before deletion, we should have 3 entries, one rating and 2 tag instances.
        $count = $DB->count_records('glossary_entries', ['glossaryid' => $this->glossary->id]);
        $this->assertEquals(3, $count);
        $tagcount = $DB->count_records('tag_instance', ['component' => 'mod_glossary', 'itemtype' => 'glossary_entries',
            'itemid' => $ge3->id]);
        $this->assertEquals(2, $tagcount);
        $aliascount = $DB->count_records('glossary_alias', ['entryid' => $ge3->id]);
        $this->assertEquals(1, $aliascount);
        $ratingcount = $DB->count_records('rating', ['component' => 'mod_glossary', 'ratingarea' => 'entry',
            'itemid' => $ge3->id]);
        $this->assertEquals(1, $ratingcount);

$contextlist = new \core_privacy\local\request\approved_contextlist($student2, 'glossary',
            [$context1->id, $context2->id]);
        provider::delete_data_for_user($contextlist);

// After deletion, the glossary entry and tags for the second student should have been deleted.
        $count = $DB->count_records('glossary_entries', ['glossaryid' => $this->glossary->id, 'userid' => $student2->id]);
        $this->assertEquals(0, $count);

$tagcount = $DB->count_records('tag_instance', ['component' => 'mod_glossary', 'itemtype' => 'glossary_entries',
                'itemid' => $ge3->id]);
        $this->assertEquals(0, $tagcount);

$commentcount = $DB->count_records('comments', ['component' => 'mod_glossary', 'commentarea' => 'glossary_entry',
                'itemid' => $ge3->id, 'userid' => $student2->id]);
        $this->assertEquals(0, $commentcount);
        $aliascount = $DB->count_records('glossary_alias', ['entryid' => $ge3->id]);
        $this->assertEquals(0, $aliascount);

// Student's 1 entries, comments and tags should not be removed.
        $count = $DB->count_records('glossary_entries', ['glossaryid' => $this->glossary->id,
                'userid' => $this->student->id]);
        $this->assertEquals(2, $count);

$tagcount = $DB->count_records('tag_instance', ['component' => 'mod_glossary', 'itemtype' => 'glossary_entries',
            'itemid' => $ge1->id]);
        $this->assertEquals(2, $tagcount);

$commentcount = $DB->count_records('comments', ['component' => 'mod_glossary', 'commentarea' => 'glossary_entry',
             'userid' => $this->student->id]);
        $this->assertEquals(1, $commentcount);

$ratingcount = $DB->count_records('rating', ['component' => 'mod_glossary', 'ratingarea' => 'entry',
            'itemid' => $ge3->id]);
        $this->assertEquals(0, $ratingcount);
    }

/**
     * Test for provider::delete_data_for_users().
     */
    public function test_delete_data_for_users() {
        global $DB;
        $generator = $this->getDataGenerator();

$student2 = $generator->create_user();
        $generator->enrol_user($student2->id, $this->course->id, 'student');

$ge1 = $this->plugingenerator->create_content($this->glossary, ['concept' => 'first user glossary entry', 'approved' => 1]);
        $ge2 = $this->plugingenerator->create_content($glossary2, ['concept' => 'first user second glossary entry',
                'approved' => 1], ['two']);

$this->setUser($student2);
        $ge3 = $this->plugingenerator->create_content($this->glossary, ['concept' => 'second user glossary entry',
                'approved' => 1], ['three']);

$comment = $this->get_comment_object($context1, $ge3->id);
        $comment->add('User 2 comment 1');
        $comment = $this->get_comment_object($context2, $ge2->id);
        $comment->add('User 2 comment 2');

core_tag_tag::set_item_tags('mod_glossary', 'glossary_entries', $ge3->id, $context1, ['Pizza', 'Noodles']);
        core_tag_tag::set_item_tags('mod_glossary', 'glossary_entries', $ge2->id, $context2, ['Potato', 'Kumara']);

// As a teacher, rate student 2's entry.
        $this->setUser($this->teacher);
        $rating = $this->get_rating_object($context1, $ge3->id);
        $rating->update_rating(2);

// Check correct glossary 1 record counts before deletion.
        $count = $DB->count_records('glossary_entries', ['glossaryid' => $this->glossary->id]);
        // Note: There is an additional student entry from setUp().
        $this->assertEquals(3, $count);

list($context1itemsql, $context1itemparams) = $DB->get_in_or_equal([$ge1->id, $ge3->id], SQL_PARAMS_NAMED);
        $geparams = [
            'component' => 'mod_glossary',
            'itemtype' => 'glossary_entries',
        ];
        $geparams += $context1itemparams;
        $wheresql = "component = :component AND itemtype = :itemtype AND itemid {$context1itemsql}";

$tagcount = $DB->count_records_select('tag_instance', $wheresql, $geparams);
        $this->assertEquals(4, $tagcount);

$aliascount = $DB->count_records_select('glossary_alias', "entryid {$context1itemsql}", $context1itemparams);
        $this->assertEquals(1, $aliascount);

$commentparams = [
            'component' => 'mod_glossary',
            'commentarea' => 'glossary_entry',
        ];
        $commentparams += $context1itemparams;
        $commentwhere = "component = :component AND commentarea = :commentarea AND itemid {$context1itemsql}";

$commentcount = $DB->count_records_select('comments', $commentwhere, $commentparams);
        $this->assertEquals(1, $commentcount);

$ratingcount = $DB->count_records('rating', ['component' => 'mod_glossary', 'ratingarea' => 'entry',
            'itemid' => $ge3->id]);
        $this->assertEquals(1, $ratingcount);

// Perform deletion within context 1 for both students.
        $approveduserlist = new core_privacy\local\request\approved_userlist($context1, 'mod_glossary',
                [$this->student->id, $student2->id]);
        provider::delete_data_for_users($approveduserlist);

// After deletion, all context 1 entries, tags and comment should be deleted.
        $count = $DB->count_records('glossary_entries', ['glossaryid' => $this->glossary->id]);
        $this->assertEquals(0, $count);

$tagcount = $DB->count_records_select('tag_instance', $wheresql, $geparams);
        $this->assertEquals(0, $tagcount);

$aliascount = $DB->count_records_select('glossary_alias', "entryid {$context1itemsql}", $context1itemparams);
        $this->assertEquals(0, $aliascount);

$commentcount = $DB->count_records_select('comments', $commentwhere, $commentparams);
        $this->assertEquals(0, $commentcount);

// Context 2 entries should remain intact.
        $count = $DB->count_records('glossary_entries', ['glossaryid' => $glossary2->id]);
        $this->assertEquals(1, $count);

$tagcount = $DB->count_records('tag_instance', ['component' => 'mod_glossary', 'itemtype' => 'glossary_entries',
                'itemid' => $ge2->id]);
        $this->assertEquals(2, $tagcount);

$aliascount = $DB->count_records('glossary_alias', ['entryid' => $ge2->id]);
        $this->assertEquals(1, $aliascount);

$commentcount = $DB->count_records('comments', ['component' => 'mod_glossary', 'commentarea' => 'glossary_entry',
             'itemid' => $ge2->id]);
        $this->assertEquals(1, $commentcount);

$ratingcount = $DB->count_records('rating', ['component' => 'mod_glossary', 'ratingarea' => 'entry',
            'itemid' => $ge3->id]);
        $this->assertEquals(0, $ratingcount);
    }

/**
     * Get the comment area for glossary module.
     *
     * @param context $context The context.
     * @param int $itemid The item ID.
     * @return comment
     */
    protected function get_comment_object(context $context, $itemid) {
        $args = new stdClass();

$args->context = $context;
        $args->course = get_course(SITEID);
        $args->area = 'glossary_entry';
        $args->itemid = $itemid;
        $args->component = 'mod_glossary';
        $comment = new comment($args);
        $comment->set_post_permission(true);

return $comment;
    }

/**
     * Get the rating area for glossary module.
     *
     * @param context $context The context.
     * @param int $itemid The item ID.
     * @return rating object
     */
    protected function get_rating_object(context $context, $itemid) {
        global $USER;

$ratingoptions = new stdClass;
        $ratingoptions->context = $context;
        $ratingoptions->ratingarea = 'entry';
        $ratingoptions->component = 'mod_glossary';
        $ratingoptions->itemid  = $itemid;
        $ratingoptions->scaleid = 2;
        $ratingoptions->userid  = $USER->id;
        return new rating($ratingoptions);
    }
}