firestore_rules.txt

service cloud.firestore {
  match /databases/{database}/documents {
      function isAdmin() {
              return exists(/databases/$(database)/documents/admin/$(request.auth.uid))
      }
    match /users/{user} {
      allow read: if true;
      allow write, update: if request.auth.uid == user;
        allow write, update: if isAdmin();
    }
    match /posts/{user}/userPosts {
      allow read: if true;
      allow write: if request.auth.uid == user;
        allow write, update: if isAdmin();

    }
    match /posts/{user}/userPosts/{postId} {
      allow read: if true;
      allow write: if request.auth.uid == user;
        allow write, update: if isAdmin();
      
    }
    match /posts/{user}/userPosts/{postId}/likes/{likeId} {
      allow read: if true;
      allow write: if request.auth.uid == likeId;
        allow write, update: if isAdmin();
    }
    match /posts/{user}/userPosts/{postId}/comments/{commentId} {
      allow read: if true;
      allow write: if request.auth.uid != null;
        allow write, update: if isAdmin();
    }
    
    match /feed/{documents=**}{
      allow read, write: if request.auth.uid != null;
    }
    match /following/{user}/userFollowing/{following} {
      allow read: if true;
      allow write: if user == request.auth.uid;

    }
      match /admin/{documents=**}{
        allow write, update, read: if false;
      }
    match /chats/{chatId}{
      allow read, update: if request.auth.uid in resource.data.users;
      allow write: if request.auth.uid != null;
    }
    match /chats/{chatId}/messages/{documents=**}{
      allow read, write: if true;
    }
  }
}