Fix psalm issues

Signed-off-by: Vitor Mattos <vitor@php.rio>

4 files changed, 7 insertions, 9 deletions

diff --git a/lib/Chat/Command/Executor.php b/lib/Chat/Command/Executor.php
index ed71f517f..3a51239c7 100644
--- a/lib/Chat/Command/Executor.php
+++ b/lib/Chat/Command/Executor.php
@@ -115,7 +115,7 @@ class Executor {
 		$message->setVerb('command');
 	}
 
-	protected function execHelp(Room $room, IComment $message, string $arguments, Participant $participant): string {
+	protected function execHelp(Room $room, IComment $message, string $arguments, Participant $participant): ?string {
 		if ($arguments !== '' && $arguments !== 'help') {
 			return $this->execHelpSingleCommand($room, $message, $arguments);
 		}
@@ -160,7 +160,7 @@ class Executor {
 		return implode("\n", $helps);
 	}
 
-	protected function execHelpSingleCommand(Room $room, IComment $message, string $arguments): string {
+	protected function execHelpSingleCommand(Room $room, IComment $message, string $arguments): ?string {
 		try {
 			$input = explode(' ', $arguments, 2);
 			if (count($input) === 1) {
@@ -186,7 +186,7 @@ class Executor {
 		}
 	}
 
-	protected function execApp(Room $room, IComment $message, Command $command, string $arguments): string {
+	protected function execApp(Room $room, IComment $message, Command $command, string $arguments): ?string {
 		$event = $this->createEvent($room, $message, $command, $arguments);
 		$this->dispatcher->dispatch(self::EVENT_APP_EXECUTE, $event);
 		return $event->getOutput();
diff --git a/lib/Events/CommandEvent.php b/lib/Events/CommandEvent.php
index 7a9e099b5..3c62182bb 100644
--- a/lib/Events/CommandEvent.php
+++ b/lib/Events/CommandEvent.php
@@ -51,7 +51,7 @@ class CommandEvent extends ChatEvent {
 		$this->output = $output;
 	}
 
-	public function getOutput(): string {
+	public function getOutput(): ?string {
 		return $this->output;
 	}
 }
diff --git a/lib/Events/EndCallForEveryoneEvent.php b/lib/Events/EndCallForEveryoneEvent.php
index b960c31a8..9710e0602 100644
--- a/lib/Events/EndCallForEveryoneEvent.php
+++ b/lib/Events/EndCallForEveryoneEvent.php
@@ -48,9 +48,8 @@ class EndCallForEveryoneEvent extends ModifyRoomEvent {
 
 	/**
 	 * Only available in the after-event
-	 * @return string[]
 	 */
-	public function getSessionIds(): array {
+	public function getSessionIds(): ?array {
 		return $this->sessionIds;
 	}
 
@@ -64,9 +63,8 @@ class EndCallForEveryoneEvent extends ModifyRoomEvent {
 
 	/**
 	 * Only available in the after-event
-	 * @return string[]
 	 */
-	public function getUserIds(): array {
+	public function getUserIds(): ?array {
 		return $this->userIds;
 	}
 }
diff --git a/lib/Service/HostedSignalingServerService.php b/lib/Service/HostedSignalingServerService.php
index ced054d78..64aa6f73b 100644
--- a/lib/Service/HostedSignalingServerService.php
+++ b/lib/Service/HostedSignalingServerService.php
@@ -243,7 +243,7 @@ class HostedSignalingServerService {
 	 *
 	 * @return (\ArrayAccess|array|mixed)[]|\ArrayAccess
 	 *
-	 * @psalm-return list<created: mixed, owner: <array>, status: mixed, signaling: <array>>
+	 * @psalm-return \ArrayAccess|array{created: mixed, owner: \ArrayAccess|array, status: mixed, signaling?: \ArrayAccess|array}
 	 */
 	public function fetchAccountInfo(AccountId $accountId) {
 		try {