Keep guest rooms moderated and restore owner moderation

app/Services/Rooms/RoomParticipationService.php

@@ -69,17 +69,19 @@ class RoomParticipationService
                 $user,
                 $sessionPlayerIds[$room->id] ?? null,
             );
+            $shouldModerate = $this->shouldModerate($room, $user);
 
             if ($player === null) {
                 $player = $room->players()->create([
                     'user_id' => $user?->id,
                     'name' => $data['player_name'],
-                    'is_moderator' => false,
+                    'is_moderator' => $shouldModerate,
                     'last_seen_at' => now(),
                 ]);
             } else {
                 $player->update([
                     'last_seen_at' => now(),
+                    'is_moderator' => $player->is_moderator || $shouldModerate,
                 ]);
             }
 
@@ -123,6 +125,7 @@ class RoomParticipationService
                 $user,
                 $sessionPlayerId,
             );
+            $shouldModerate = $this->shouldModerate($lockedRoom, $user);
 
             $nameIsTaken = $lockedRoom->players()
                 ->where('name', $playerName)
@@ -144,18 +147,19 @@ class RoomParticipationService
                 $player = $lockedRoom->players()->create([
                     'user_id' => $user?->id,
                     'name' => $playerName,
-                    'is_moderator' => false,
+                    'is_moderator' => $shouldModerate,
                     'last_seen_at' => now(),
                 ]);
                 $change = RoomStateChange::PlayerJoined;
             } else {
-                if ($player->name !== $playerName) {
+                if ($player->name !== $playerName || ($shouldModerate && ! $player->is_moderator)) {
                     $change = RoomStateChange::PlayerUpdated;
                 }
 
                 $updates = [
                     'name' => $playerName,
                     'last_seen_at' => now(),
+                    'is_moderator' => $player->is_moderator || $shouldModerate,
                 ];
 
                 if (
@@ -196,6 +200,16 @@ class RoomParticipationService
         return $player;
     }
 
+    private function shouldModerate(Room $room, ?User $user): bool
+    {
+        if ($user !== null && $room->owner_id === $user->id) {
+            return true;
+        }
+
+        return $room->owner_id === null
+            && ! $room->players()->where('is_moderator', true)->exists();
+    }
+
     private function findExistingEmbeddedPlayer(
         Room $room,
         ?User $user,
@@ -218,7 +232,10 @@ class RoomParticipationService
                 ->lockForUpdate()
                 ->first();
 
-            if ($sessionPlayer !== null) {
+            if (
+                $sessionPlayer !== null
+                && ($user === null || $sessionPlayer->user_id === null || $sessionPlayer->user_id === $user->id)
+            ) {
                 return $sessionPlayer;
             }
         }