friendica/src/Module/Settings/UserExport.php

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<?php
/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Module\Settings;
use Friendica\Core\Hook;
use Friendica\Core\Renderer;
use Friendica\Database\DBA;
use Friendica\Database\DBStructure;
use Friendica\DI;
use Friendica\Model\Item;
use Friendica\Model\Post;
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use Friendica\Module\BaseSettings;
use Friendica\Network\HTTPException;
/**
* Module to export user data
**/
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class UserExport extends BaseSettings
{
/**
* Handle the request to export data.
* At the moment one can export three different data set
* 1. The profile data that can be used by uimport to resettle
* to a different Friendica instance
* 2. The entire data-set, profile plus postings
* 3. A list of contacts as CSV file similar to the export of Mastodon
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*
* If there is an action required through the URL / path, react
* accordingly and export the requested data.
*
* @return string
* @throws HTTPException\ForbiddenException
* @throws HTTPException\InternalServerErrorException
*/
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public function content(): string
{
if (!local_user()) {
throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
}
parent::content();
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/**
* options shown on "Export personal data" page
* list of array( 'link url', 'link text', 'help text' )
*/
$options = [
['settings/userexport/account', DI::l10n()->t('Export account'), DI::l10n()->t('Export your account info and contacts. Use this to make a backup of your account and/or to move it to another server.')],
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['settings/userexport/backup', DI::l10n()->t('Export all'), DI::l10n()->t("Export your account info, contacts and all your items as json. Could be a very big file, and could take a lot of time. Use this to make a full backup of your account \x28photos are not exported\x29")],
['settings/userexport/contact', DI::l10n()->t('Export Contacts to CSV'), DI::l10n()->t("Export the list of the accounts you are following as CSV file. Compatible to e.g. Mastodon.")],
];
Hook::callAll('uexport_options', $options);
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$tpl = Renderer::getMarkupTemplate("settings/userexport.tpl");
return Renderer::replaceMacros($tpl, [
'$title' => DI::l10n()->t('Export personal data'),
'$options' => $options
]);
}
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/**
* raw content generated for the different choices made
* by the user. At the moment this returns a JSON file
* to the browser which then offers a save / open dialog
* to the user.
*
* @throws HTTPException\ForbiddenException
*/
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public function rawContent()
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{
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if (!DI::app()->isLoggedIn()) {
throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
}
$args = DI::args();
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if ($args->getArgc() == 3) {
// @TODO Replace with router-provided arguments
$action = $args->get(2);
switch ($action) {
case "backup":
header("Content-type: application/json");
header('Content-Disposition: attachment; filename="' . DI::app()->getLoggedInUserNickname() . '.' . $action . '"');
self::exportAll(local_user());
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break;
case "account":
header("Content-type: application/json");
header('Content-Disposition: attachment; filename="' . DI::app()->getLoggedInUserNickname() . '.' . $action . '"');
self::exportAccount(local_user());
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break;
case "contact":
header("Content-type: application/csv");
header('Content-Disposition: attachment; filename="' . DI::app()->getLoggedInUserNickname() . '-contacts.csv' . '"');
self::exportContactsAsCSV(local_user());
break;
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}
exit();
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}
}
/**
* @param string $query
* @return array
* @throws \Exception
*/
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private static function exportMultiRow(string $query)
{
$dbStructure = DBStructure::definition(DI::app()->getBasePath(), false);
preg_match("/\s+from\s+`?([a-z\d_]+)`?/i", $query, $match);
$table = $match[1];
$result = [];
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$rows = DBA::p($query);
while ($row = DBA::fetch($rows)) {
$p = [];
foreach ($dbStructure[$table]['fields'] as $column => $field) {
if (!isset($row[$column])) {
continue;
}
if ($field['type'] == 'datetime') {
$p[$column] = $row[$column] ?? DBA::NULL_DATETIME;
} else {
$p[$column] = $row[$column];
}
}
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$result[] = $p;
}
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DBA::close($rows);
return $result;
}
/**
* @param string $query
* @return array
* @throws \Exception
*/
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private static function exportRow(string $query)
{
$dbStructure = DBStructure::definition(DI::app()->getBasePath(), false);
preg_match("/\s+from\s+`?([a-z\d_]+)`?/i", $query, $match);
$table = $match[1];
$result = [];
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$rows = DBA::p($query);
while ($row = DBA::fetch($rows)) {
foreach ($row as $k => $v) {
if (empty($dbStructure[$table]['fields'][$k])) {
continue;
}
switch ($dbStructure[$table]['fields'][$k]['type']) {
case 'datetime':
$result[$k] = $v ?? DBA::NULL_DATETIME;
break;
default:
$result[$k] = $v;
break;
}
}
}
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DBA::close($rows);
return $result;
}
/**
* Export a list of the contacts as CSV file as e.g. Mastodon and Pleroma are doing.
*
* @param int $user_id
* @throws \Exception
*/
private static function exportContactsAsCSV(int $user_id)
{
if (!$user_id) {
throw new \RuntimeException(DI::l10n()->t('Permission denied.'));
}
// write the table header (like Mastodon)
echo "Account address, Show boosts\n";
// get all the contacts
$contacts = DBA::select('contact', ['addr', 'url'], ['uid' => $user_id, 'self' => false, 'rel' => [1, 3], 'deleted' => false]);
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while ($contact = DBA::fetch($contacts)) {
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echo ($contact['addr'] ?: $contact['url']) . ", true\n";
}
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DBA::close($contacts);
}
/**
* @param int $user_id
* @throws \Exception
*/
private static function exportAccount(int $user_id)
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{
if (!$user_id) {
throw new \RuntimeException(DI::l10n()->t('Permission denied.'));
}
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$user = self::exportRow(
sprintf("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", $user_id)
);
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$contact = self::exportMultiRow(
sprintf("SELECT * FROM `contact` WHERE `uid` = %d ", $user_id)
);
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$profile = self::exportMultiRow(
sprintf("SELECT *, 'default' AS `profile_name`, 1 AS `is-default` FROM `profile` WHERE `uid` = %d ", $user_id)
);
$profile_fields = self::exportMultiRow(
sprintf("SELECT * FROM `profile_field` WHERE `uid` = %d ", $user_id)
);
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$photo = self::exportMultiRow(
sprintf("SELECT * FROM `photo` WHERE uid = %d AND profile = 1", $user_id)
);
foreach ($photo as &$p) {
$p['data'] = bin2hex($p['data']);
}
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$pconfig = self::exportMultiRow(
sprintf("SELECT * FROM `pconfig` WHERE uid = %d", $user_id)
);
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$group = self::exportMultiRow(
sprintf("SELECT * FROM `group` WHERE uid = %d", $user_id)
);
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$group_member = self::exportMultiRow(
sprintf("SELECT `group_member`.`gid`, `group_member`.`contact-id` FROM `group_member` INNER JOIN `group` ON `group`.`id` = `group_member`.`gid` WHERE `group`.`uid` = %d", $user_id)
);
$output = [
'version' => FRIENDICA_VERSION,
'schema' => DB_UPDATE_VERSION,
'baseurl' => DI::baseUrl(),
'user' => $user,
'contact' => $contact,
'profile' => $profile,
'profile_fields' => $profile_fields,
'photo' => $photo,
'pconfig' => $pconfig,
'group' => $group,
'group_member' => $group_member,
];
echo json_encode($output, JSON_PARTIAL_OUTPUT_ON_ERROR);
}
/**
* echoes account data and items as separated json, one per line
*
* @param int $user_id
* @throws \Exception
*/
private static function exportAll(int $user_id)
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{
if (!$user_id) {
throw new \RuntimeException(DI::l10n()->t('Permission denied.'));
}
self::exportAccount($user_id);
echo "\n";
$total = Post::count(['uid' => $user_id]);
// chunk the output to avoid exhausting memory
for ($x = 0; $x < $total; $x += 500) {
$items = Post::selectToArray(Item::ITEM_FIELDLIST, ['uid' => $user_id], ['limit' => [$x, 500]]);
$output = ['item' => $items];
echo json_encode($output, JSON_PARTIAL_OUTPUT_ON_ERROR) . "\n";
}
}
}