diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..c850a85
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+/js/* binary
diff --git a/.gitignore b/.gitignore
index edfd906..4fa09b5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,4 +26,7 @@ cypress/snapshots
 js/
 
 # Compile-Cache
-v8-compile-cache-0/
\ No newline at end of file
+v8-compile-cache-0/
+
+# php-cs cache
+.php_cs.cache
\ No newline at end of file
diff --git a/.php_cs.dist b/.php_cs.dist
new file mode 100644
index 0000000..8a0cb43
--- /dev/null
+++ b/.php_cs.dist
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+require_once './vendor/autoload.php';
+
+use Nextcloud\CodingStandard\Config;
+
+$config = new Config();
+$config
+	->getFinder()
+	->notPath('build')
+	->notPath('l10n')
+	->notPath('src')
+	->notPath('vendor')
+	->in(__DIR__);
+return $config;
diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
index d7c02af..a2a11bb 100644
--- a/lib/AppInfo/Application.php
+++ b/lib/AppInfo/Application.php
@@ -28,13 +28,9 @@ declare(strict_types=1);
 namespace OCA\Forms\AppInfo;
 
 use OCP\AppFramework\App;
-use OCP\IL10N;
-use OCP\INavigationManager;
-use OCP\IURLGenerator;
 
 class Application extends App {
-
-	const APP_ID = 'forms';
+	public const APP_ID = 'forms';
 
 	/**
 	 * Application constructor.
diff --git a/lib/Controller/ApiController.php b/lib/Controller/ApiController.php
index 6481d5c..c615b15 100644
--- a/lib/Controller/ApiController.php
+++ b/lib/Controller/ApiController.php
@@ -47,7 +47,6 @@ use OCP\IUserSession;
 use OCP\Security\ISecureRandom;
 
 class ApiController extends Controller {
-
 	protected $appName;
 
 	/** @var SubmissionMapper */
@@ -123,8 +122,8 @@ class ApiController extends Controller {
 
 	/**
 	 * @NoAdminRequired
-	 * 
-	 * 
+	 *
+	 *
 	 * Read all information to edit a Form (form, questions, options, except submissions/answers).
 	 */
 	public function getForm(int $id): Http\JSONResponse {
@@ -307,14 +306,14 @@ class ApiController extends Controller {
 		}
 
 		// Check if array contains duplicates
-		if ( array_unique($newOrder) !== $newOrder ) {
+		if (array_unique($newOrder) !== $newOrder) {
 			$this->logger->debug('The given Array contains duplicates.');
 			return new Http\JSONResponse([], Http::STATUS_BAD_REQUEST);
 		}
 
 		// Check if all questions are given in Array.
 		$questions = $this->questionMapper->findByForm($formId);
-		if ( sizeof($questions) !== sizeof($newOrder) ) {
+		if (sizeof($questions) !== sizeof($newOrder)) {
 			$this->logger->debug('The length of the given array does not match the number of stored questions');
 			return new Http\JSONResponse([], Http::STATUS_BAD_REQUEST);
 		}
@@ -323,8 +322,7 @@ class ApiController extends Controller {
 		$response = []; // Array of ['questionId' => ['order' => newOrder]]
 
 		// Store array of Question-Entities and check the Questions FormId & old Order.
-		foreach($newOrder as $arrayKey => $questionId) {
-
+		foreach ($newOrder as $arrayKey => $questionId) {
 			try {
 				$questions[$arrayKey] = $this->questionMapper->findById($questionId);
 			} catch (IMapperException $e) {
@@ -344,7 +342,7 @@ class ApiController extends Controller {
 
 			// Abort if a question is already marked as deleted (order==0)
 			$oldOrder = $questions[$arrayKey]->getOrder();
-			if ( $oldOrder === 0) {
+			if ($oldOrder === 0) {
 				$this->logger->debug('This Question has already been marked as deleted: Id: {id}', [
 					'id' => $questions[$arrayKey]->getId()
 				]);
@@ -359,7 +357,7 @@ class ApiController extends Controller {
 		}
 
 		// Write to Database
-		foreach($questions as $question) {
+		foreach ($questions as $question) {
 			$this->questionMapper->update($question);
 
 			$response[$question->getId()] = [
@@ -443,7 +441,7 @@ class ApiController extends Controller {
 		$formQuestions = $this->questionMapper->findByForm($form->getId());
 		foreach ($formQuestions as $question) {
 			$questionOrder = $question->getOrder();
-			if ( $questionOrder > $deletedOrder ) {
+			if ($questionOrder > $deletedOrder) {
 				$question->setOrder($questionOrder - 1);
 				$this->questionMapper->update($question);
 			}
@@ -489,7 +487,7 @@ class ApiController extends Controller {
 	/**
 	 * @NoAdminRequired
 	 * Writes the given key-value pairs into Database.
-
+	 *
 	 * @param int $id OptionId of option to update
 	 * @param array $keyValuePairs Array of key=>value pairs to update.
 	 */
@@ -589,7 +587,7 @@ class ApiController extends Controller {
 	/**
 	 * @NoAdminRequired
 	 * @PublicPage
-	 * 
+	 *
 	 * Process a new submission
 	 * @param int $formId
 	 * @param array $answers [question_id => arrayOfString]
@@ -617,7 +615,7 @@ class ApiController extends Controller {
 		$submission->setTimestamp(time());
 
 		// If not logged in or anonymous use anonID
-		if (!$user || $form->getIsAnonymous()){
+		if (!$user || $form->getIsAnonymous()) {
 			$anonID = "anon-user-".  hash('md5', (time() + rand()));
 			$submission->setUserId($anonID);
 		} else {
@@ -629,7 +627,7 @@ class ApiController extends Controller {
 		$submissionId = $submission->getId();
 
 		// Process Answers
-		foreach($answers as $questionId => $answerArray) {
+		foreach ($answers as $questionId => $answerArray) {
 			// Search corresponding Question, skip processing if not found
 			$questionIndex = array_search($questionId, array_column($questions, 'id'));
 			if ($questionIndex === false) {
@@ -638,11 +636,11 @@ class ApiController extends Controller {
 				$question = $questions[$questionIndex];
 			}
 
-			foreach($answerArray as $answer) {
-				if($question['type'] === 'multiple' || $question['type'] === 'multiple_unique') {
+			foreach ($answerArray as $answer) {
+				if ($question['type'] === 'multiple' || $question['type'] === 'multiple_unique') {
 					// Search corresponding option, skip processing if not found
 					$optionIndex = array_search($answer, array_column($question['options'], 'id'));
-					if($optionIndex === false) {
+					if ($optionIndex === false) {
 						continue;
 					} else {
 						$option = $question['options'][$optionIndex];
@@ -650,7 +648,6 @@ class ApiController extends Controller {
 
 					// Load option-text
 					$answerText = $option['text'];
-
 				} else {
 					$answerText = $answer; // Not a multiple-question, answerText is given answer
 				}
diff --git a/lib/Controller/PageController.php b/lib/Controller/PageController.php
index 92f3ead..38fb997 100644
--- a/lib/Controller/PageController.php
+++ b/lib/Controller/PageController.php
@@ -44,7 +44,6 @@ use OCP\IUserSession;
 use OCP\Util;
 
 class PageController extends Controller {
-
 	protected $appName;
 
 	/** @var FormMapper */
@@ -115,7 +114,7 @@ class PageController extends Controller {
 	/**
 	 * @NoAdminRequired
 	 * @NoCSRFRequired
-	 * 
+	 *
 	 * TODO: Implement cloning
 	 *
 	 * @return TemplateResponse
@@ -189,7 +188,7 @@ class PageController extends Controller {
 	/**
 	 * @NoAdminRequired
 	 * Check if user has access to this form
-	 * 
+	 *
 	 * @param Form $form
 	 * @return boolean
 	 */
@@ -215,7 +214,7 @@ class PageController extends Controller {
 		// Refuse access, if SubmitOnce is set and user already has taken part.
 		if ($form->getSubmitOnce()) {
 			$participants = $this->submissionMapper->findParticipantsByForm($form->getId());
-			foreach($participants as $participant) {
+			foreach ($participants as $participant) {
 				if ($participant === $user->getUID()) {
 					return false;
 				}
@@ -235,7 +234,7 @@ class PageController extends Controller {
 
 		// Check if access granted by group.
 		foreach ($access['groups'] as $group) {
-			if( $this->groupManager->isInGroup($user->getUID(), $group) ) {
+			if ($this->groupManager->isInGroup($user->getUID(), $group)) {
 				return true;
 			}
 		}
diff --git a/lib/Controller/SystemController.php b/lib/Controller/SystemController.php
index 68a517d..7af5459 100644
--- a/lib/Controller/SystemController.php
+++ b/lib/Controller/SystemController.php
@@ -29,13 +29,10 @@ use OCP\AppFramework\Http;
 use OCP\AppFramework\Http\DataResponse;
 
 use OCP\IGroupManager;
-use OCP\IUser;
 use OCP\IUserManager;
-use OCP\IConfig;
 use OCP\IRequest;
 
 class SystemController extends Controller {
-
 	public function __construct(
 		string $appName,
 		IGroupManager $groupManager,
@@ -52,9 +49,9 @@ class SystemController extends Controller {
 	 * @NoAdminRequired
 	 * @return DataResponse
 	 */
-	public function getSiteUsersAndGroups($query = '', $getGroups = true, $getUsers = true, $skipGroups = array(), $skipUsers = array()) {
-		$list = array();
-		$data = array();
+	public function getSiteUsersAndGroups($query = '', $getGroups = true, $getUsers = true, $skipGroups = [], $skipUsers = []) {
+		$list = [];
+		$data = [];
 		if ($getGroups) {
 			$groups = $this->groupManager->search($query);
 			foreach ($groups as $group) {
diff --git a/lib/Db/Answer.php b/lib/Db/Answer.php
index 250697e..ee8e22e 100644
--- a/lib/Db/Answer.php
+++ b/lib/Db/Answer.php
@@ -59,5 +59,4 @@ class Answer extends Entity {
 			'text' => htmlspecialchars_decode($this->getText()),
 		];
 	}
-
 }
diff --git a/lib/Db/AnswerMapper.php b/lib/Db/AnswerMapper.php
index 58c18b1..4d4b746 100644
--- a/lib/Db/AnswerMapper.php
+++ b/lib/Db/AnswerMapper.php
@@ -58,8 +58,8 @@ class AnswerMapper extends QBMapper {
 	}
 
 	/**
-	* @param int $submissionId
-	*/
+	 * @param int $submissionId
+	 */
 	public function deleteBySubmission(int $submissionId): void {
 		$qb = $this->db->getQueryBuilder();
 
@@ -70,5 +70,4 @@ class AnswerMapper extends QBMapper {
 
 		$qb->execute();
 	}
-
 }
diff --git a/lib/Db/Form.php b/lib/Db/Form.php
index 81940f9..db6e0e2 100644
--- a/lib/Db/Form.php
+++ b/lib/Db/Form.php
@@ -50,7 +50,6 @@ use OCP\AppFramework\Db\Entity;
  * @method void setSubmitOnce(bool $value)
  */
 class Form extends Entity {
-
 	protected $hash;
 	protected $title;
 	protected $description;
diff --git a/lib/Db/FormMapper.php b/lib/Db/FormMapper.php
index f8e7812..75d258c 100644
--- a/lib/Db/FormMapper.php
+++ b/lib/Db/FormMapper.php
@@ -33,7 +33,7 @@ class FormMapper extends QBMapper {
 
 	/**
 	 * FormMapper constructor.
-	 * 
+	 *
 	 * @param IDBConnection $db
 	 */
 	public function __construct(IDBConnection $db) {
@@ -102,5 +102,4 @@ class FormMapper extends QBMapper {
 
 		return $this->findEntities($qb);
 	}
-
 }
diff --git a/lib/Db/OptionMapper.php b/lib/Db/OptionMapper.php
index 6e25fa1..91029ad 100644
--- a/lib/Db/OptionMapper.php
+++ b/lib/Db/OptionMapper.php
@@ -26,7 +26,6 @@ declare(strict_types=1);
 
 namespace OCA\Forms\Db;
 
-use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IDBConnection;
 use OCP\AppFramework\Db\QBMapper;
 
@@ -80,5 +79,4 @@ class OptionMapper extends QBMapper {
 
 		return $this->findEntity($qb);
 	}
-
 }
diff --git a/lib/Db/Question.php b/lib/Db/Question.php
index 77860ce..090d320 100644
--- a/lib/Db/Question.php
+++ b/lib/Db/Question.php
@@ -48,7 +48,7 @@ class Question extends Entity {
 	protected $mandatory;
 	protected $text;
 
-	const TYPES = [
+	public const TYPES = [
 		'short',
 		'long',
 		'multiple',
diff --git a/lib/Db/QuestionMapper.php b/lib/Db/QuestionMapper.php
index 83df607..cb0efe4 100644
--- a/lib/Db/QuestionMapper.php
+++ b/lib/Db/QuestionMapper.php
@@ -30,10 +30,7 @@ use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IDBConnection;
 use OCP\AppFramework\Db\QBMapper;
 
-use OCA\Forms\Db\OptionMapper;
-
 class QuestionMapper extends QBMapper {
-
 	private $optionMapper;
 
 	public function __construct(IDBConnection $db, OptionMapper $optionMapper) {
@@ -102,5 +99,4 @@ class QuestionMapper extends QBMapper {
 
 		return $this->findEntity($qb);
 	}
-
 }
diff --git a/lib/Db/Submission.php b/lib/Db/Submission.php
index 8c639ac..6aaaea9 100644
--- a/lib/Db/Submission.php
+++ b/lib/Db/Submission.php
@@ -59,5 +59,4 @@ class Submission extends Entity {
 			'timestamp' => $this->getTimestamp(),
 		];
 	}
-
 }
diff --git a/lib/Db/SubmissionMapper.php b/lib/Db/SubmissionMapper.php
index 32a968a..94a496a 100644
--- a/lib/Db/SubmissionMapper.php
+++ b/lib/Db/SubmissionMapper.php
@@ -29,10 +29,7 @@ use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IDBConnection;
 use OCP\AppFramework\Db\QBMapper;
 
-use OCA\Forms\Db\AnswerMapper;
-
 class SubmissionMapper extends QBMapper {
-
 	private $answerMapper;
 
 	/**
@@ -80,7 +77,7 @@ class SubmissionMapper extends QBMapper {
 		$submissionEntities = $this->findEntities($qb);
 
 		// From array of submissionEntities produce array of userIds.
-		$userIds = array_map(function($submissionEntity) {
+		$userIds = array_map(function ($submissionEntity) {
 			return $submissionEntity->getUserId();
 		}, $submissionEntities);
 
@@ -88,8 +85,8 @@ class SubmissionMapper extends QBMapper {
 	}
 
 	/**
-	* @param int $formId
-	*/
+	 * @param int $formId
+	 */
 	public function deleteByForm(int $formId): void {
 		$qb = $this->db->getQueryBuilder();
 
diff --git a/lib/Migration/Version0010Date20190000000007.php b/lib/Migration/Version0010Date20190000000007.php
index f30dd84..566f5c0 100644
--- a/lib/Migration/Version0010Date20190000000007.php
+++ b/lib/Migration/Version0010Date20190000000007.php
@@ -23,11 +23,8 @@
 
 namespace OCA\Forms\Migration;
 
-use Doctrine\DBAL\Exception\TableNotFoundException;
-use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
 use Doctrine\DBAL\Types\Type;
 use OCP\DB\ISchemaWrapper;
-use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IConfig;
 use OCP\IDBConnection;
 use OCP\Migration\SimpleMigrationStep;
diff --git a/lib/Migration/Version010200Date20200323141300.php b/lib/Migration/Version010200Date20200323141300.php
index cb63716..aad7c07 100644
--- a/lib/Migration/Version010200Date20200323141300.php
+++ b/lib/Migration/Version010200Date20200323141300.php
@@ -24,8 +24,6 @@
 
 namespace OCA\Forms\Migration;
 
-use Doctrine\DBAL\Exception\TableNotFoundException;
-use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
 use Doctrine\DBAL\Types\Type;
 use OCP\DB\ISchemaWrapper;
 use OCP\DB\QueryBuilder\IQueryBuilder;
@@ -214,7 +212,7 @@ class Version010200Date20200323141300 extends SimpleMigrationStep {
 		$schema = $schemaClosure();
 
 		// if Database exists.
-		if( $schema->hasTable('forms_events') ){
+		if ($schema->hasTable('forms_events')) {
 			$id_mapping = [];
 			$id_mapping['events'] = []; // Maps oldevent-id => ['newId' => newevent-id, 'nextQuestionOrder' => integer]
 			$id_mapping['questions'] = []; // Maps oldquestion-id => ['newId' => newquestion-id]
@@ -227,7 +225,7 @@ class Version010200Date20200323141300 extends SimpleMigrationStep {
 			$qb_fetch->select('id', 'hash', 'title', 'description', 'owner', 'created', 'access', 'expire', 'is_anonymous', 'unique')
 				->from('forms_events');
 			$cursor = $qb_fetch->execute();
-			while( $event = $cursor->fetch() ){ 
+			while ($event = $cursor->fetch()) {
 				$newAccessJSON = $this->convertAccessList($event['access']);
 
 				$qb_restore->insert('forms_v2_forms')
@@ -257,9 +255,9 @@ class Version010200Date20200323141300 extends SimpleMigrationStep {
 			$qb_fetch->select('id', 'form_id', 'form_question_type', 'form_question_text')
 				->from('forms_questions');
 			$cursor = $qb_fetch->execute();
-			while( $question = $cursor->fetch() ){
+			while ($question = $cursor->fetch()) {
 				//In case the old Question would have been longer than current possible length, create a warning and shorten text to avoid Error on upgrade.
-				if(strlen($question['form_question_text']) > 2048) {
+				if (strlen($question['form_question_text']) > 2048) {
 					$output->warning("Question-text is too long for new Database: '" . $question['form_question_text'] . "'");
 					$question['form_question_text'] = substr($question['form_question_text'], 0, 2048);
 				}
@@ -283,9 +281,9 @@ class Version010200Date20200323141300 extends SimpleMigrationStep {
 			$qb_fetch->select('question_id', 'text')
 				->from('forms_answers');
 			$cursor = $qb_fetch->execute();
-			while( $answer = $cursor->fetch() ){
+			while ($answer = $cursor->fetch()) {
 				//In case the old Answer would have been longer than current possible length, create a warning and shorten text to avoid Error on upgrade.
-				if(strlen($answer['text']) > 1024) {
+				if (strlen($answer['text']) > 1024) {
 					$output->warning("Option-text is too long for new Database: '" . $answer['text'] . "'");
 					$answer['text'] = substr($answer['text'], 0, 1024);
 				}
@@ -307,7 +305,7 @@ class Version010200Date20200323141300 extends SimpleMigrationStep {
 			$qb_fetch->select('id')
 				->from('forms_events');
 			$cursor = $qb_fetch->execute();
-			while( $tmp = $cursor->fetch() ){
+			while ($tmp = $cursor->fetch()) {
 				$event_structure[$tmp['id']] = $tmp;
 			}
 			$cursor->closeCursor();
@@ -319,7 +317,7 @@ class Version010200Date20200323141300 extends SimpleMigrationStep {
 					->from('forms_questions')
 					->where($qb_fetch->expr()->eq('form_id', $qb_fetch->createNamedParameter($event['id'], IQueryBuilder::PARAM_INT)));
 				$cursor = $qb_fetch->execute();
-				while( $tmp = $cursor->fetch() ) {
+				while ($tmp = $cursor->fetch()) {
 					$event_structure[$event['id']]['questions'][] = $tmp;
 				}
 				$cursor->closeCursor();
@@ -337,9 +335,9 @@ class Version010200Date20200323141300 extends SimpleMigrationStep {
 			$qb_fetch->select('id', 'form_id', 'user_id', 'vote_option_id', 'vote_option_text', 'vote_answer')
 				->from('forms_votes');
 			$cursor = $qb_fetch->execute();
-			while( $vote = $cursor->fetch() ){ 
+			while ($vote = $cursor->fetch()) {
 				//If the form changed, if the user changed or if vote_option_id became smaller than last one, then a new submission is interpreted.
-				if ( ($vote['form_id'] != $last_vote['form_id']) || ($vote['user_id'] != $last_vote['user_id']) || ($vote['vote_option_id'] < $last_vote['vote_option_id'])) {
+				if (($vote['form_id'] != $last_vote['form_id']) || ($vote['user_id'] != $last_vote['user_id']) || ($vote['vote_option_id'] < $last_vote['vote_option_id'])) {
 					$qb_restore->insert('forms_v2_submissions')
 						->values([
 							'form_id' => $qb_restore->createNamedParameter($id_mapping['events'][$vote['form_id']]['newId'], IQueryBuilder::PARAM_INT),
@@ -352,7 +350,7 @@ class Version010200Date20200323141300 extends SimpleMigrationStep {
 				$last_vote = $vote;
 				
 				//In case the old Answer would have been longer than current possible length, create a warning and shorten text to avoid Error on upgrade.
-				if(strlen($vote['vote_answer']) > 2048) {
+				if (strlen($vote['vote_answer']) > 2048) {
 					$output->warning("Answer-text is too long for new Database: '" . $vote['vote_answer'] . "'");
 					$vote['vote_answer'] = substr($vote['vote_answer'], 0, 2048);
 				}
@@ -396,7 +394,7 @@ class Version010200Date20200323141300 extends SimpleMigrationStep {
 		$accessArray['groups'] = [];
 
 		$stringExplode = explode(';', $accessString);
-		foreach($stringExplode as $string) {
+		foreach ($stringExplode as $string) {
 			if (strpos($string, 'user_') === 0) {
 				$accessArray['users'][] = substr($string, 5);
 			} elseif (strpos($string, 'group_') === 0) {
diff --git a/lib/Service/FormsService.php b/lib/Service/FormsService.php
index c6e0c38..b28aece 100644
--- a/lib/Service/FormsService.php
+++ b/lib/Service/FormsService.php
@@ -54,12 +54,11 @@ class FormsService {
 
 	public function getOptions(int $questionId): array {
 		$optionList = [];
-		try{
+		try {
 			$optionEntities = $this->optionMapper->findByQuestion($questionId);
 			foreach ($optionEntities as $optionEntity) {
 				$optionList[] = $optionEntity->read();
 			}
-
 		} catch (DoesNotExistException $e) {
 			//handle silently
 		} finally {
@@ -69,17 +68,16 @@ class FormsService {
 
 	public function getQuestions(int $formId): array {
 		$questionList = [];
-		try{
+		try {
 			$questionEntities = $this->questionMapper->findByForm($formId);
 			foreach ($questionEntities as $questionEntity) {
 				$question = $questionEntity->read();
 				$question['options'] = $this->getOptions($question['id']);
 				$questionList[] =  $question;
 			}
-
 		} catch (DoesNotExistException $e) {
 			//handle silently
-		}finally{
+		} finally {
 			return $questionList;
 		}
 	}
@@ -98,5 +96,4 @@ class FormsService {
 
 		return $result;
 	}
-
 }