Nodes/firestore.rules at main · code-with-zoro/Nodes · GitHub

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rules_version = '2';

service cloud.firestore {
  match /databases/{database}/documents {

    /* =========================
       🔧 Helper Functions
    ========================== */

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

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

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

    /* =========================
       👤 USERS
    ========================== */

    match /users/{userId} {
      allow read: if isSignedIn();
      allow create, update: if isUser(userId);
      allow delete: if false;

      match /likedPosts/{postId} {
        allow read, write: if isUser(userId);
      }
      match /savedPosts/{postId} {
        allow read, write: if isUser(userId);
      }
      match /blocked/{blockedId} {
        allow read, write: if isUser(userId);
      }
      match /connections/{connectionId} {
        allow read, write: if isUser(userId);
      }
      match /classrooms/{classroomId} {
        allow read, write: if isUser(userId);
      }
    }

    /* =========================
       📝 POSTS
    ========================== */

    match /posts/{postId} {
      allow read: if true;
      allow create: if isSignedIn() && isOwner(request.resource.data.userId);
      allow update, delete: if isSignedIn() && isOwner(resource.data.userId);

      match /comments/{commentId} {
        allow read: if true;
        allow create: if isSignedIn() && isOwner(request.resource.data.userId);
        allow update, delete: if isSignedIn() && isOwner(resource.data.userId);
      }
    }

    /* =========================
       👥 COMMUNITIES
    ========================== */

    match /communities/{communityId} {
      allow read: if true;
      allow create: if isSignedIn() && isOwner(request.resource.data.creatorId);
      allow update, delete: if isSignedIn() && isOwner(resource.data.creatorId);

      match /members/{memberId} {
        allow read: if true;
        allow create, delete: if isSignedIn() &&
          (isUser(memberId) ||
           isOwner(get(/databases/$(database)/documents/communities/$(communityId)).data.creatorId));
      }
    }

    /* =========================
       🔔 NOTIFICATIONS
    ========================== */

    match /notifications/{notificationId} {
      allow read: if isSignedIn() &&
        (request.auth.uid == resource.data.recipientId ||
         request.auth.uid == resource.data.actor.id);

      allow create: if isSignedIn() &&
        request.auth.uid == request.resource.data.actor.id;

      allow update, delete: if isSignedIn() &&
        request.auth.uid == resource.data.recipientId;
    }

    /* =========================
       🤝 FRIEND REQUESTS
    ========================== */

    match /friendRequests/{requestId} {
      allow read: if isSignedIn() &&
        (request.auth.uid == resource.data.fromUserId ||
         request.auth.uid == resource.data.toUserId);

      allow create: if isSignedIn() &&
        request.auth.uid == request.resource.data.fromUserId;

      allow update: if isSignedIn() &&
        request.auth.uid == resource.data.toUserId;

      allow delete: if isSignedIn() &&
        (request.auth.uid == resource.data.fromUserId ||
         request.auth.uid == resource.data.toUserId);
    }

    /* =========================
       📚 STUDY QUESTIONS
    ========================== */

    match /studyQuestions/{questionId} {
      allow read: if true;
      allow create: if isSignedIn() && isOwner(request.resource.data.authorId);
      allow update, delete: if isSignedIn() && isOwner(resource.data.authorId);

      match /comments/{commentId} {
        allow read: if true;
        allow create: if isSignedIn() && isOwner(request.resource.data.userId);
        allow update, delete: if isSignedIn() && isOwner(resource.data.userId);
      }
    }

    /* =========================
       🏫 CLASSROOMS
    ========================== */

    match /classrooms/{classroomId} {
      allow read: if isSignedIn() &&
        resource.data.memberIds.hasAny([request.auth.uid]);

      allow create: if isSignedIn() &&
        isOwner(request.resource.data.creatorId);

      allow update, delete: if isSignedIn() &&
        isOwner(resource.data.creatorId);
    }

    /* =========================
       💬 CHATS (FINAL & BULLETPROOF)
    ========================== */

    match /chats/{chatId} {

      // Only participants can read chat
      allow read: if isSignedIn() &&
        request.auth.uid in resource.data.participantIds;

      // Create chat if user is listed as participant
      allow create: if isSignedIn() &&
        request.auth.uid in request.resource.data.participantIds;

      // Participants can update metadata
      allow update: if isSignedIn() &&
        request.auth.uid in resource.data.participantIds;

      allow delete: if false;

      /* ---- MESSAGES ---- */
      match /messages/{messageId} {

        // Only signed-in users can read messages of existing chats
        allow read: if isSignedIn() &&
          request.auth.uid in get(/databases/$(database)/documents/chats/$(chatId)).data.participantIds;

        // ✅ FIRST MESSAGE + ALL MESSAGES SAFE
        allow create: if isSignedIn() &&
          request.auth.uid == request.resource.data.senderId;

        allow update, delete: if false;
      }
    }

  }
}