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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/>. | ||
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/** | ||
* Data provider. | ||
* | ||
* @package core_webservice | ||
* @copyright 2018 Frédéric Massart | ||
* @author Frédéric Massart <fred@branchup.tech> | ||
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | ||
*/ | ||
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namespace core_webservice\privacy; | ||
defined('MOODLE_INTERNAL') || die(); | ||
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use context; | ||
use context_user; | ||
use core_privacy\local\metadata\collection; | ||
use core_privacy\local\request\approved_contextlist; | ||
use core_privacy\local\request\transform; | ||
use core_privacy\local\request\writer; | ||
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/** | ||
* Data provider class. | ||
* | ||
* @package core_webservice | ||
* @copyright 2018 Frédéric Massart | ||
* @author Frédéric Massart <fred@branchup.tech> | ||
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | ||
*/ | ||
class provider implements | ||
\core_privacy\local\metadata\provider, | ||
\core_privacy\local\request\subsystem\provider { | ||
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/** | ||
* Returns metadata. | ||
* | ||
* @param collection $collection The initialised collection to add items to. | ||
* @return collection A listing of user data stored through this system. | ||
*/ | ||
public static function get_metadata(collection $collection) { | ||
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$collection->add_database_table('external_tokens', [ | ||
'token' => 'privacy:metadata:tokens:token', | ||
'privatetoken' => 'privacy:metadata:tokens:privatetoken', | ||
'tokentype' => 'privacy:metadata:tokens:tokentype', | ||
'userid' => 'privacy:metadata:tokens:userid', | ||
'creatorid' => 'privacy:metadata:tokens:creatorid', | ||
'iprestriction' => 'privacy:metadata:tokens:iprestriction', | ||
'validuntil' => 'privacy:metadata:tokens:validuntil', | ||
'timecreated' => 'privacy:metadata:tokens:timecreated', | ||
'lastaccess' => 'privacy:metadata:tokens:lastaccess', | ||
], 'privacy:metadata:tokens'); | ||
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$collection->add_database_table('external_services_users', [ | ||
'userid' => 'privacy:metadata:serviceusers:userid', | ||
'iprestriction' => 'privacy:metadata:serviceusers:iprestriction', | ||
'validuntil' => 'privacy:metadata:serviceusers:validuntil', | ||
'timecreated' => 'privacy:metadata:serviceusers:timecreated', | ||
], 'privacy:metadata:serviceusers'); | ||
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return $collection; | ||
} | ||
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/** | ||
* Get the list of contexts that contain user information for the specified user. | ||
* | ||
* @param int $userid The user to search. | ||
* @return contextlist $contextlist The contextlist containing the list of contexts used in this plugin. | ||
*/ | ||
public static function get_contexts_for_userid($userid) { | ||
$contextlist = new \core_privacy\local\request\contextlist(); | ||
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$sql = " | ||
SELECT ctx.id | ||
FROM {external_tokens} t | ||
JOIN {context} ctx | ||
ON ctx.instanceid = t.userid | ||
AND ctx.contextlevel = :userlevel | ||
WHERE t.userid = :userid1 | ||
OR t.creatorid = :userid2"; | ||
$contextlist->add_from_sql($sql, ['userlevel' => CONTEXT_USER, 'userid1' => $userid, 'userid2' => $userid]); | ||
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$sql = " | ||
SELECT ctx.id | ||
FROM {external_services_users} su | ||
JOIN {context} ctx | ||
ON ctx.instanceid = su.userid | ||
AND ctx.contextlevel = :userlevel | ||
WHERE su.userid = :userid"; | ||
$contextlist->add_from_sql($sql, ['userlevel' => CONTEXT_USER, 'userid' => $userid]); | ||
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return $contextlist; | ||
} | ||
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/** | ||
* Export all user data for the specified user, in the specified contexts. | ||
* | ||
* @param approved_contextlist $contextlist The approved contexts to export information for. | ||
*/ | ||
public static function export_user_data(approved_contextlist $contextlist) { | ||
global $DB; | ||
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$userid = $contextlist->get_user()->id; | ||
$contexts = array_reduce($contextlist->get_contexts(), function($carry, $context) use ($userid) { | ||
if ($context->contextlevel == CONTEXT_USER) { | ||
if ($context->instanceid == $userid) { | ||
$carry['has_mine'] = true; | ||
} else { | ||
$carry['others'][] = $context->instanceid; | ||
} | ||
} | ||
return $carry; | ||
}, [ | ||
'has_mine' => false, | ||
'others' => [] | ||
]); | ||
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$path = [get_string('webservices', 'core_webservice')]; | ||
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// Exporting my stuff. | ||
if ($contexts['has_mine']) { | ||
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$data = []; | ||
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// Exporting my tokens. | ||
$sql = " | ||
SELECT t.*, s.name as externalservicename | ||
FROM {external_tokens} t | ||
JOIN {external_services} s | ||
ON s.id = t.externalserviceid | ||
WHERE t.userid = :userid | ||
ORDER BY t.id"; | ||
$recordset = $DB->get_recordset_sql($sql, ['userid' => $userid]); | ||
foreach ($recordset as $record) { | ||
if (!isset($data['tokens'])) { | ||
$data['tokens'] = []; | ||
} | ||
$data['tokens'][] = static::transform_token($record); | ||
} | ||
$recordset->close(); | ||
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// Exporting the services I have access to. | ||
$sql = " | ||
SELECT su.*, s.name as externalservicename | ||
FROM {external_services_users} su | ||
JOIN {external_services} s | ||
ON s.id = su.externalserviceid | ||
WHERE su.userid = :userid | ||
ORDER BY su.id"; | ||
$recordset = $DB->get_recordset_sql($sql, ['userid' => $userid]); | ||
foreach ($recordset as $record) { | ||
if (!isset($data['services_user'])) { | ||
$data['services_user'] = []; | ||
} | ||
$data['services_user'][] = [ | ||
'external_service' => $record->externalservicename, | ||
'ip_restriction' => $record->iprestriction, | ||
'valid_until' => $record->validuntil ? transform::datetime($record->validuntil) : null, | ||
'created_on' => transform::datetime($record->timecreated), | ||
]; | ||
} | ||
$recordset->close(); | ||
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if (!empty($data)) { | ||
writer::with_context(context_user::instance($userid))->export_data($path, (object) $data); | ||
}; | ||
} | ||
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// Exporting the tokens I created. | ||
if (!empty($contexts['others'])) { | ||
list($insql, $inparams) = $DB->get_in_or_equal($contexts['others'], SQL_PARAMS_NAMED); | ||
$sql = " | ||
SELECT t.*, s.name as externalservicename | ||
FROM {external_tokens} t | ||
JOIN {external_services} s | ||
ON s.id = t.externalserviceid | ||
WHERE t.userid $insql | ||
AND t.creatorid = :userid1 | ||
AND t.userid <> :userid2 | ||
ORDER BY t.userid, t.id"; | ||
$params = array_merge($inparams, ['userid1' => $userid, 'userid2' => $userid]); | ||
$recordset = $DB->get_recordset_sql($sql, $params); | ||
static::recordset_loop_and_export($recordset, 'userid', [], function($carry, $record) { | ||
$carry[] = static::transform_token($record); | ||
return $carry; | ||
}, function($userid, $data) use ($path) { | ||
writer::with_context(context_user::instance($userid))->export_related_data($path, 'created_by_you', (object) [ | ||
'tokens' => $data | ||
]); | ||
}); | ||
} | ||
} | ||
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/** | ||
* Delete all data for all users in the specified context. | ||
* | ||
* @param context $context The specific context to delete data for. | ||
*/ | ||
public static function delete_data_for_all_users_in_context(context $context) { | ||
if ($context->contextlevel != CONTEXT_USER) { | ||
return; | ||
} | ||
static::delete_user_data($context->instanceid); | ||
} | ||
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/** | ||
* Delete all user data for the specified user, in the specified contexts. | ||
* | ||
* @param approved_contextlist $contextlist The approved contexts and user information to delete information for. | ||
*/ | ||
public static function delete_data_for_user(approved_contextlist $contextlist) { | ||
$userid = $contextlist->get_user()->id; | ||
foreach ($contextlist as $context) { | ||
if ($context->contextlevel == CONTEXT_USER && $context->instanceid == $userid) { | ||
static::delete_user_data($context->instanceid); | ||
break; | ||
} | ||
} | ||
} | ||
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/** | ||
* Delete user data. | ||
* | ||
* @param int $userid The user ID. | ||
* @return void | ||
*/ | ||
protected static function delete_user_data($userid) { | ||
global $DB; | ||
$DB->delete_records('external_tokens', ['userid' => $userid]); | ||
$DB->delete_records('external_services_users', ['userid' => $userid]); | ||
} | ||
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/** | ||
* Transform a token entry. | ||
* | ||
* @param object $record The token record. | ||
* @return array | ||
*/ | ||
protected static function transform_token($record) { | ||
$notexportedstr = get_string('privacy:request:notexportedsecurity', 'core_webservice'); | ||
return [ | ||
'external_service' => $record->externalservicename, | ||
'token' => $notexportedstr, | ||
'private_token' => $record->privatetoken ? $notexportedstr : null, | ||
'ip_restriction' => $record->iprestriction, | ||
'valid_until' => $record->validuntil ? transform::datetime($record->validuntil) : null, | ||
'created_on' => transform::datetime($record->timecreated), | ||
'last_access' => $record->lastaccess ? transform::datetime($record->lastaccess) : null, | ||
]; | ||
} | ||
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/** | ||
* Loop and export from a recordset. | ||
* | ||
* @param \moodle_recordset $recordset The recordset. | ||
* @param string $splitkey The record key to determine when to export. | ||
* @param mixed $initial The initial data to reduce from. | ||
* @param callable $reducer The function to return the dataset, receives current dataset, and the current record. | ||
* @param callable $export The function to export the dataset, receives the last value from $splitkey and the dataset. | ||
* @return void | ||
*/ | ||
protected static function recordset_loop_and_export(\moodle_recordset $recordset, $splitkey, $initial, | ||
callable $reducer, callable $export) { | ||
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$data = $initial; | ||
$lastid = null; | ||
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foreach ($recordset as $record) { | ||
if ($lastid && $record->{$splitkey} != $lastid) { | ||
$export($lastid, $data); | ||
$data = $initial; | ||
} | ||
$data = $reducer($data, $record); | ||
$lastid = $record->{$splitkey}; | ||
} | ||
$recordset->close(); | ||
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if (!empty($lastid)) { | ||
$export($lastid, $data); | ||
} | ||
} | ||
} |
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