Grindly/firestore.rules at main · getgrindly/Grindly · GitHub

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rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    // Default deny
    match /{document=**} {
      allow read, write: if false;
    }

    function isSignedIn() {
      return request.auth != null;
    }

    function isOwner(userId) {
      return isSignedIn() && request.auth.uid == userId;
    }

    function isValidUser(data) {
      return data.keys().hasAll(['uid', 'email']) &&
             data.uid is string &&
             data.email is string &&
             data.email.size() < 256;
    }

    match /users/{userId} {
      allow get: if isOwner(userId);
      allow create: if isOwner(userId) && isValidUser(request.resource.data);
      allow update: if isOwner(userId) &&
                    request.resource.data.diff(resource.data).affectedKeys().hasOnly(['progression', 'lastLogin', 'displayName', 'photoURL']);
    }

    match /submissions/{submissionId} {
      allow list: if isSignedIn() && resource.data.userId == request.auth.uid;
      allow get: if isSignedIn() && resource.data.userId == request.auth.uid;
      allow create: if isSignedIn() && request.resource.data.userId == request.auth.uid;
    }
  }
}