firestore.rules

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /SavedMaps/{projectID} {
      allow read: if request.auth.uid != null;
      allow update: if canCreateMap() &&
      	isOwnerOnFile();
      allow create: if canCreateMap();  
      allow delete: if canDeleteMap();  
      
      function isSignedIn(){
      	return (request.auth.uid != null)
     	} 
   		function isOwner(){
        return (request.auth.uid == request.resource.data.uid)
     	}
      function canCreateMap() {
          return isSignedIn() && isOwner();
      }
      function isOwnerOnFile(){
          return (request.auth.uid == resource.data.uid)
      }
      function canDeleteMap(){
          return isSignedIn() && isOwnerOnFile();
      }
    }
  }
 
}