firestore.rules

rules_version = '2';

// To pick the right project: `firebase projects:list`, then `firebase use <project-name>`
// To deploy: `firebase deploy --only firestore:rules`
service cloud.firestore {
  match /databases/{database}/documents {

    function isAdmin() {
      return request.auth.uid == 'igi2zGXsfxYPgB0DJTXVJVmwCOr2' // Austin
        || request.auth.uid == '5LZ4LgYuySdL1huCWe7bti02ghx2' // James
        || request.auth.uid == 'tlmGNz9kjXc2EteizMORes4qvWl2' // Stephen
        || request.auth.uid == 'IPTOzEqrpkWmEzh6hwvAyY9PqFb2' // Manifold
    }

    match /users/{userId} {
      allow read;
      allow update: if resource.data.id == request.auth.uid
        && request.resource.data.diff(resource.data).affectedKeys()
            .hasOnly(['bio', 'bannerUrl', 'website', 'twitterHandle', 'discordHandle']);
    }

    match /private-users/{userId} {
      allow read: if resource.data.id == request.auth.uid || isAdmin();
    }

    match /private-users/{userId}/views/{viewId} {
      allow create: if userId == request.auth.uid;
    }

    match /private-users/{userId}/events/{eventId} {
      allow create: if userId == request.auth.uid;
    }

    match /private-users/{userId}/latency/{loadTimeId} {
      allow create: if userId == request.auth.uid;
    }

    match /private-users/{userId}/cache/feed {
      allow read: if userId == request.auth.uid || isAdmin();
    }

    match /contracts/{contractId} {
      allow read;
      allow update: if request.resource.data.diff(resource.data).affectedKeys()
        .hasOnly(['description', 'closeTime', 'tags', 'lowercaseTags']);
      allow update: if isAdmin();
    }

    match /{somePath=**}/bets/{betId} {
      allow read;
    }

    function commentMatchesUser(userId, comment) {
      // it's a bad look if someone can impersonate other ids/names/avatars so check everything
      let user = get(/databases/$(database)/documents/users/$(userId));
      return comment.userId == userId
        && comment.userName == user.data.name
        && comment.userUsername == user.data.username
        && comment.userAvatarUrl == user.data.avatarUrl;
    }

    match /{somePath=**}/comments/{commentId} {
      allow read;
      allow create: if request.auth != null && commentMatchesUser(request.auth.uid, request.resource.data);
    }

    match /{somePath=**}/answers/{answerId} {
      allow read;
    }

    match /folds/{foldId} {
      allow read;
      allow update: if request.auth.uid == resource.data.curatorId
        && request.resource.data.diff(resource.data).affectedKeys()
        .hasOnly(['name', 'about', 'tags', 'lowercaseTags']);
      allow delete: if request.auth.uid == resource.data.curatorId;
    }

    match /{somePath=**}/followers/{userId} {
      allow read;
      allow create, update: if request.auth.uid == userId && request.resource.data.userId == userId;
      allow delete: if request.auth.uid == userId;
    }

    match /txns/{txnId} {
      allow read;
    }
  }
}