firestore.rules

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    // User documents
    match /users/{userId} {
      // Allow users to read/write their own user document
      allow read, write: if request.auth != null && request.auth.uid == userId;
      
      // Media subcollection - users can only access their own media
      match /media/{mediaId} {
        allow read, write: if request.auth != null && request.auth.uid == userId;
      }
    }
    
    // Legacy path support (if still needed)
    match /mediaItems/{document} {
      allow read, write: if request.auth != null && 
        (resource == null || resource.data.userId == request.auth.uid);
    }
    
    // Deny all other access
    match /{document=**} {
      allow read, write: if false;
    }
  }
}