Blogify/firestore.rules at main · mariaspatani/Blogify · GitHub

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rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {

    // ── users ──────────────────────────────────────────────────────────────
    // Anyone can read a user profile (needed for author display)
    // Only the authenticated owner can create or update their own document
    match /users/{uid} {
      allow read: if true;
      allow create: if request.auth != null
        && request.auth.uid == uid;
      allow update: if request.auth != null
        && request.auth.uid == uid;
    }

    // ── comments ───────────────────────────────────────────────────────────
    // Anyone can read comments (public blog posts)
    // Authenticated users can create comments where uid matches their auth uid
    // Only the comment author can delete their own comment
    match /comments/{commentId} {
      allow read: if true;
      allow create: if request.auth != null
        && request.resource.data.uid == request.auth.uid
        && request.resource.data.content is string
        && request.resource.data.content.size() > 0;
      allow delete: if request.auth != null
        && resource.data.uid == request.auth.uid;
    }

    // ── likes ──────────────────────────────────────────────────────────────
    // Anyone can read like counts (shown on public blog posts)
    // Authenticated users can create/delete their own like documents
    // Document ID convention: uid_postId
    match /likes/{likeId} {
      allow read: if true;
      allow create: if request.auth != null
        && request.resource.data.uid == request.auth.uid;
      allow delete: if request.auth != null
        && resource.data.uid == request.auth.uid;
    }

    // ── bookmarks ──────────────────────────────────────────────────────────
    // Only the owning user can read/write their bookmarks
    // getDoc on a non-existent document: resource is null, so we allow
    // authenticated reads unconditionally and let the app filter by uid
    match /bookmarks/{bookmarkId} {
      allow read: if request.auth != null;
      allow create: if request.auth != null
        && request.resource.data.uid == request.auth.uid;
      allow delete: if request.auth != null
        && resource.data.uid == request.auth.uid;
    }
  }
}