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Merge branch 'MDL-61994-master' of git://github.com/lameze/moodle
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@junpataleta
David Monllao authored and junpataleta committed May 10, 2018
2 parents f60b216 + fe80a5a commit aea028f
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332 changes: 332 additions & 0 deletions mod/glossary/classes/privacy/provider.php
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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 Subsystem implementation for mod_glossary.
*
* @package mod_glossary
* @copyright 2018 Simey Lameze <simey@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace mod_glossary\privacy;
use core_privacy\local\metadata\collection;
use core_privacy\local\request\approved_contextlist;
use core_privacy\local\request\contextlist;
use core_privacy\local\request\deletion_criteria;
use core_privacy\local\request\helper;
use core_privacy\local\request\writer;

defined('MOODLE_INTERNAL') || die();
/**
* Implementation of the privacy subsystem plugin provider for the glossary activity module.
*
* @copyright 2018 Simey Lameze <simey@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class provider implements
// This plugin stores personal data.
\core_privacy\local\metadata\provider,
// This plugin is a core_user_data_provider.
\core_privacy\local\request\plugin\provider {

/**
* Return the fields which contain personal data.
*
* @param collection $items a reference to the collection to use to store the metadata.
* @return collection the updated collection of metadata items.
*/
public static function get_metadata(collection $items) : collection {
$items->add_database_table(
'glossary_entries',
[
'glossaryid' => 'privacy:metadata:glossary_entries:glossaryid',
'userid' => 'privacy:metadata:glossary_entries:userid',
'concept' => 'privacy:metadata:glossary_entries:concept',
'definition' => 'privacy:metadata:glossary_entries:definition',
'attachment' => 'privacy:metadata:glossary_entries:attachment',
'timemodified' => 'privacy:metadata:glossary_entries:timemodified',
],
'privacy:metadata:glossary_entries'
);

$items->add_subsystem_link('core_files', [], 'privacy:metadata:core_files');
$items->add_subsystem_link('core_comment', [], 'privacy:metadata:core_comments');
$items->add_subsystem_link('core_tag', [], 'privacy:metadata:core_tag');
$items->add_subsystem_link('core_ratings', [], 'privacy:metadata:core_ratings');
return $items;
}

/**
* Get the list of contexts that contain user information for the specified user.
*
* @param int $userid the userid.
* @return contextlist the list of contexts containing user info for the user.
*/
public static function get_contexts_for_userid(int $userid) : contextlist {
$ratingquery = \core_rating\privacy\provider::get_sql_join('r', 'mod_glossary', 'entry', 'ge.id', $userid);

$sql = "SELECT c.id
FROM {context} c
INNER JOIN {course_modules} cm ON cm.id = c.instanceid AND c.contextlevel = :contextlevel
INNER JOIN {modules} m ON m.id = cm.module AND m.name = :modname
INNER JOIN {glossary} g ON g.id = cm.instance
INNER JOIN {glossary_entries} ge ON ge.glossaryid = g.id
LEFT JOIN {comments} com ON com.commentarea =:commentarea AND com.itemid = ge.id
{$ratingquery->join}
WHERE ge.userid = :glossaryentryuserid OR com.userid = :commentuserid OR {$ratingquery->userwhere}";
$params = [
'contextlevel' => CONTEXT_MODULE,
'modname' => 'glossary',
'commentarea' => 'glossary_entry',
'glossaryentryuserid' => $userid,
'commentuserid' => $userid,
] + $ratingquery->params;

$contextlist = new contextlist();
$contextlist->add_from_sql($sql, $params);

return $contextlist;
}

/**
* Export personal data for the given approved_contextlist.
*
* User and context information is contained within the contextlist.
*
* @param approved_contextlist $contextlist a list of contexts approved for export.
*/
public static function export_user_data(approved_contextlist $contextlist) {
global $DB;

if (empty($contextlist->count())) {
return;
}

$user = $contextlist->get_user();

list($contextsql, $contextparams) = $DB->get_in_or_equal($contextlist->get_contextids(), SQL_PARAMS_NAMED);
$sql = "SELECT ge.id as entryid,
cm.id AS cmid,
ge.userid,
ge.concept,
ge.definition,
ge.definitionformat,
ge.attachment,
ge.timecreated,
ge.timemodified
FROM {glossary_entries} ge
JOIN {glossary} g ON ge.glossaryid = g.id
JOIN {course_modules} cm ON g.id = cm.instance
JOIN {context} c ON cm.id = c.instanceid
WHERE c.id {$contextsql}
AND ge.userid = :userid
OR EXISTS (SELECT 1 FROM {comments} com WHERE com.commentarea = :commentarea AND com.itemid = ge.id
AND com.userid = :commentuserid)
OR EXISTS (SELECT 1 FROM {rating} r WHERE r.contextid = c.id AND r.itemid = ge.id
AND r.component = :ratingcomponent
AND r.ratingarea = :ratingarea
AND r.userid = :ratinguserid)
ORDER BY ge.id, cm.id";
$params = [
'userid' => $user->id,
'commentarea' => 'glossary_entry',
'commentuserid' => $user->id,
'ratingcomponent' => 'mod_glossary',
'ratingarea' => 'entry',
'ratinguserid' => $user->id
] + $contextparams;
$glossaryentries = $DB->get_recordset_sql($sql, $params);

// Reference to the glossary activity seen in the last iteration of the loop. By comparing this with the
// current record, and because we know the results are ordered, we know when we've moved to the entries
// for a new glossary activity and therefore when we can export the complete data for the last activity.
$lastcmid = null;

$glossarydata = [];
foreach ($glossaryentries as $record) {
$concept = format_string($record->concept);
$path = array_merge([get_string('entries', 'mod_glossary'), $concept . " ({$record->entryid})"]);

// If we've moved to a new glossary, then write the last glossary data and reinit the glossary data array.
if (!is_null($lastcmid)) {
if ($lastcmid != $record->cmid) {
if (!empty($glossarydata)) {
$context = \context_module::instance($lastcmid);
self::export_glossary_data_for_user($glossarydata, $context, [], $user);
$glossarydata = [];
}
}
}
$lastcmid = $record->cmid;
$context = \context_module::instance($lastcmid);

// Export files added on the glossary entry definition field.
$definition = format_text(writer::with_context($context)->rewrite_pluginfile_urls($path, 'mod_glossary',
'entry', $record->entryid, $record->definition), $record->definitionformat);

// Export just the files attached to this user entry.
if ($record->userid == $user->id) {
// Get all files attached to the glossary attachment.
writer::with_context($context)->export_area_files($path, 'mod_glossary', 'entry', $record->entryid);

// Get all files attached to the glossary attachment.
writer::with_context($context)->export_area_files($path, 'mod_glossary', 'attachment', $record->entryid);
}

// Export associated comments.
\core_comment\privacy\provider::export_comments($context, 'mod_glossary', 'glossary_entry',
$record->entryid, $path, $record->userid != $user->id);

// Export associated tags.
\core_tag\privacy\provider::export_item_tags($user->id, $context, $path, 'mod_glossary', 'glossary_entries',
$record->entryid, $record->userid != $user->id);

// Export associated ratings.
\core_rating\privacy\provider::export_area_ratings($user->id, $context, $path, 'mod_glossary', 'entry',
$record->entryid, $record->userid != $user->id);

$glossarydata['entries'][] = [
'concept' => $record->concept,
'definition' => $definition,
'timecreated' => \core_privacy\local\request\transform::datetime($record->timecreated),
'timemodified' => \core_privacy\local\request\transform::datetime($record->timemodified)
];
}
$glossaryentries->close();

// The data for the last activity won't have been written yet, so make sure to write it now!
if (!empty($glossarydata)) {
$context = \context_module::instance($lastcmid);
self::export_glossary_data_for_user($glossarydata, $context, [], $user);
}
}

/**
* Export the supplied personal data for a single glossary activity, along with any generic data or area files.
*
* @param array $glossarydata The personal data to export for the glossary.
* @param \context_module $context The context of the glossary.
* @param array $subcontext The location within the current context that this data belongs.
* @param \stdClass $user the user record
*/
protected static function export_glossary_data_for_user(array $glossarydata, \context_module $context,
array $subcontext, \stdClass $user) {
// Fetch the generic module data for the glossary.
$contextdata = helper::get_context_data($context, $user);
// Merge with glossary data and write it.
$contextdata = (object)array_merge((array)$contextdata, $glossarydata);
writer::with_context($context)->export_data($subcontext, $contextdata);
// Write generic module intro files.
helper::export_context_files($context, $user);
}

/**
* Delete all data for all users in the specified context.
*
* @param \context $context the context to delete in.
*/
public static function delete_data_for_all_users_in_context(\context $context) {
global $DB;
if (empty($context)) {
return;
}

if ($context->contextlevel != CONTEXT_MODULE) {
return;
}

$instanceid = $DB->get_field('course_modules', 'instance', ['id' => $context->instanceid], MUST_EXIST);
$DB->record_exists('glossary', ['id' => $context->instanceid]);
$DB->delete_records('glossary_entries', ['glossaryid' => $instanceid]);

if ($context->contextlevel == CONTEXT_MODULE) {
$instanceid = $DB->get_field('course_modules', 'instance', ['id' => $context->instanceid], MUST_EXIST);
$DB->record_exists('glossary', ['id' => $context->instanceid]);

$entries = $DB->get_records('glossary_entries', ['glossaryid' => $instanceid]);
foreach ($entries as $entry) {
// Delete related entry categories.
$DB->delete_records('glossary_entries_categories', ['entryid' => $entry->id]);

// Delete related entry aliases.
$DB->delete_records('glossary_alias', ['entryid' => $entry->id]);
}

// Delete entry and attachment files.
get_file_storage()->delete_area_files($context->id, 'mod_glossary', 'entry');
get_file_storage()->delete_area_files($context->id, 'mod_glossary', 'attachment');

// Delete related ratings.
\core_rating\privacy\provider::delete_ratings($context, 'mod_glossary', 'entry');

// Delete comments.
\core_comment\privacy\provider::delete_comments_for_all_users($context, 'mod_glossary', 'glossary_entry');

// Delete tags.
\core_tag\privacy\provider::delete_item_tags($context, 'mod_glossary', 'glossary_entries');

// Now delete all user related entries.
$DB->delete_records('glossary_entries', ['glossaryid' => $instanceid]);
}
}

/**
* Delete all user data for the specified user, in the specified contexts.
*
* @param approved_contextlist $contextlist a list of contexts approved for deletion.
*/
public static function delete_data_for_user(approved_contextlist $contextlist) {
global $DB;

if (empty($contextlist->count())) {
return;
}

$userid = $contextlist->get_user()->id;
foreach ($contextlist->get_contexts() as $context) {
if ($context->contextlevel == CONTEXT_MODULE) {

$instanceid = $DB->get_field('course_modules', 'instance', ['id' => $context->instanceid], MUST_EXIST);
$DB->record_exists('glossary', ['id' => $context->instanceid]);

$entries = $DB->get_records('glossary_entries', ['glossaryid' => $instanceid, 'userid' => $userid]);
foreach ($entries as $entry) {
// Delete related entry categories.
$DB->delete_records('glossary_entries_categories', ['entryid' => $entry->id]);

// Delete related entry aliases.
$DB->delete_records('glossary_alias', ['entryid' => $entry->id]);

// Delete tags.
\core_tag\privacy\provider::delete_item_tags($context, 'mod_glossary', 'glossary_entries', $entry->id);

// Delete entry and attachment files.
get_file_storage()->delete_area_files($context->id, 'mod_glossary', 'entry', $entry->id);
get_file_storage()->delete_area_files($context->id, 'mod_glossary', 'attachment', $entry->id);

// Delete related ratings.
\core_rating\privacy\provider::delete_ratings($context, 'mod_glossary', 'entry', $entry->id);
}

// Delete comments.
\core_comment\privacy\provider::delete_comments_for_user($contextlist, 'mod_glossary', 'glossary_entry');

// Now delete all user related entries.
$DB->delete_records('glossary_entries', ['glossaryid' => $instanceid, 'userid' => $userid]);
}
}
}
}
12 changes: 12 additions & 0 deletions mod/glossary/lang/en/glossary.php
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$string['print'] = 'Print';
$string['printerfriendly'] = 'Printer-friendly version';
$string['printviewnotallowed'] = 'Print view isn\'t allowed';
$string['privacy'] = 'Privacy of results';
$string['privacy:metadata:core_comments'] = 'Comments made on glossary definitions are stored using core_comment system';
$string['privacy:metadata:core_files'] = 'Files linked to glossary definitions are stored using the core_files system';
$string['privacy:metadata:core_ratings'] = 'Ratings added to glossary entries are stored using core_ratings system ';
$string['privacy:metadata:core_tag'] = 'Tags added to glossary definitions are stored using core_tag system ';
$string['privacy:metadata:glossary_entries'] = 'Information about the user\'s entries for a given glossary activity';
$string['privacy:metadata:glossary_entries:attachment'] = 'The attachment of the entry the user added';
$string['privacy:metadata:glossary_entries:concept'] = 'The concept of the entry the user added';
$string['privacy:metadata:glossary_entries:definition'] = 'The definition of the entry the user added';
$string['privacy:metadata:glossary_entries:glossaryid'] = 'The ID of the glossary activity the user is providing entry for';
$string['privacy:metadata:glossary_entries:userid'] = 'The ID of the user that is adding this glossary entry';
$string['privacy:metadata:glossary_entries:timemodified'] = 'The timestamp indicating when the glossary entry was modified by the user';
$string['question'] = 'Question';
$string['rejectedentries'] = 'Rejected entries';
$string['rejectionrpt'] = 'Rejection report';
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