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<?php
/**
* @copyright Copyright (c) 2017 Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
*
* @author René Gieling <github@dartcafe.de>
*
* @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 <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\Polls\Service;
use OCA\Polls\Db\Vote;
use OCA\Polls\Db\VoteMapper;
use OCA\Polls\Db\Comment;
use OCA\Polls\Db\CommentMapper;
class AnonymizeService {
/** @var VoteMapper */
private $voteMapper;
/** @var CommentMapper */
private $commentMapper;
/** @var array */
private $anonList = [];
/** @var string */
private $userId;
/** @var int */
private $pollId;
public function __construct(
VoteMapper $voteMapper,
CommentMapper $commentMapper
) {
$this->voteMapper = $voteMapper;
$this->commentMapper = $commentMapper;
}
/**
* Anonymizes the participants of a poll
* @NoAdminRequired
* @param Array $array Input list which should be anonymized must be a collection of Vote or Comment
* @return array Returns the original array with anonymized user names
*/
private function anonymize($array) {
// get mapping for the complete poll
foreach ($array as &$element) {
// skip current user
if ($element->getUserId() !== $this->userId) {
// Check, if searched user name is in mapping array
if (isset($this->anonList[$element->getUserId()])) {
//replace original user name
$element->setUserId($this->anonList[$element->getUserId()]);
} else {
// User name is not in mapping array, set static text
$element->setUserId('Unknown user');
}
}
}
return $array;
}
/**
* Initialize anonymizer with pollId and userId
* Creates a mapping list with unique Anonymous strings based on the partcipants of a poll
* @NoAdminRequired
* @param int $pollId
* @param string $userId - usernames, which will not be anonymized
*/
public function set($pollId, $userId) {
$this->pollId = $pollId;
$this->userId = $userId;
$votes = $this->voteMapper->findByPoll($pollId);
$comments = $this->commentMapper->findByPoll($pollId);
$i = 0;
foreach ($votes as $element) {
if (!array_key_exists($element->getUserId(), $this->anonList) && $element->getUserId() !== $userId) {
$this->anonList[$element->getUserId()] = 'Anonymous ' . ++$i;
}
}
foreach ($comments as $element) {
if (!array_key_exists($element->getUserId(), $this->anonList) && $element->getUserId() !== $userId) {
$this->anonList[$element->getUserId()] = 'Anonymous ' . ++$i;
}
}
return;
}
/**
* Anonymizes the comments of a poll
* @NoAdminRequired
* @return object Returns anonymized comments
*/
public function getComments() {
// get mapping for the complete poll
return $this->anonymize($this->commentMapper->findByPoll($this->pollId));
}
/**
* Anonymizes the participants of a poll
* @NoAdminRequired
* @return array Returns anonymized votes
*/
public function getVotes() {
return $this->anonymize($this->voteMapper->findByPoll($this->pollId));
}
}
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