Limit number of files in a firebase storage path

Question

I want to limit the number of files that a user can upload to a firebase storage path. Here is my firebase storage rule:

   service firebase.storage {
  matc         


        

Answer 1

In case any one needs an answer I found the solution by using firebase cloud functions:

exports.getNumOfFile = functions.storage.object().onChange(event => {
    const object = event.data; // The Storage object.
    const fileBucket = object.bucket; // The Storage bucket that contains the file.
    const bucket = gcs.bucket(fileBucket);
    bucket.getFiles({
        prefix: "[path]", //Path like what you use to get reference of your files in storage 
    }, (error, files) => {
        console.log(files.length);
    });
});

You can find more options here:

https://googlecloudplatform.github.io/google-cloud-node/#/docs/storage/1.1.0/storage/bucket?method=getFiles