tindog-backend/firestore.rules at main · tpiaggio/tindog-backend · GitHub

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rules_version = '2';

service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {

      function isValidString(stringToValidate) {
        return stringToValidate is string && stringToValidate.trim() != "";
      }

      function isValidDog() {
        return isValidString(request.resource.data.name) &&
        isValidString(request.resource.data.breed) &&
        isValidString(request.resource.data.size) &&
        isValidString(request.resource.data.description)
      }

      function isMessageAllowed(chatId) {
        return request.auth.uid in get(/databases/$(database)/documents/chats/$(chatId)).data.userIds;
      }

      match /dogs/{dogId} {
        allow read: if request.auth != null;
        allow create, update: if request.auth.uid == request.resource.data.userId && isValidDog();
        allow delete: if false;
      }

      match /chats/{chatId} {
        allow read: if request.auth.uid in resource.data.userIds;
        allow write: if false;

        match /messages/{messageId} {
          allow read: if isMessageAllowed(chatId);
          allow create: if isMessageAllowed(chatId) && request.auth.uid == request.resource.data.userId;
          allow update, delete: if false;
        }
      }
    }
  }
}