albdev.al/firestore.rules at master · AlbDev/albdev.al · GitHub

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rules_version = '2';

service cloud.firestore {
  match /databases/{database}/documents {
    // Helper functions
    function isSignedIn() {
      return request.auth != null;
    }

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

    // Users collection
    match /users/{userId} {
      allow read: if true;
      allow create: if isOwner(userId);
      allow update: if isOwner(userId);
      allow delete: if isOwner(userId);
    }

    // Communities collection
    match /communities/{communityId} {
      allow read: if true;
      allow create: if isSignedIn();
      allow update: if isSignedIn() && (
        resource.data.creatorId == request.auth.uid ||
        exists(/databases/$(database)/documents/communityMembers/$(request.auth.uid + '_' + communityId)) &&
        get(/databases/$(database)/documents/communityMembers/$(request.auth.uid + '_' + communityId)).data.role in ['admin', 'moderator']
      );
      allow delete: if isSignedIn() && resource.data.creatorId == request.auth.uid;
    }

    // Community members
    match /communityMembers/{memberId} {
      allow read: if true;
      allow create: if isSignedIn();
      allow update: if isSignedIn();
      allow delete: if isSignedIn() && resource.data.userId == request.auth.uid;
    }

    // Posts collection
    match /posts/{postId} {
      allow read: if true;
      allow create: if isSignedIn();
      allow update: if isSignedIn() && (
        resource.data.authorId == request.auth.uid ||
        exists(/databases/$(database)/documents/communityMembers/$(request.auth.uid + '_' + resource.data.communityId)) &&
        get(/databases/$(database)/documents/communityMembers/$(request.auth.uid + '_' + resource.data.communityId)).data.role in ['admin', 'moderator']
      );
      allow delete: if isSignedIn() && resource.data.authorId == request.auth.uid;
    }

    // Comments collection
    match /comments/{commentId} {
      allow read: if true;
      allow create: if isSignedIn();
      allow update: if isSignedIn() && resource.data.authorId == request.auth.uid;
      allow delete: if isSignedIn() && resource.data.authorId == request.auth.uid;
    }

    // Post votes
    match /postVotes/{voteId} {
      allow read: if true;
      allow write: if isSignedIn() && voteId.matches(request.auth.uid + '_.*');
    }

    // Comment votes
    match /commentVotes/{voteId} {
      allow read: if true;
      allow write: if isSignedIn() && voteId.matches(request.auth.uid + '_.*');
    }
  }
}