#cloud functions #trigger #cloud storage

helloGCS-index.js

exports.helloGCS = (event, callback) => {
  const file = event.data;

  if (file.resourceState === 'not_exists') {
    console.log(`File ${file.name} deleted.`);
  } else if (file.metageneration === '1') {
    // metageneration attribute is updated on metadata changes.
    // on create value is 1
    console.log(`File ${file.name} uploaded.`);
  } else {
    console.log(`File ${file.name} metadata updated.`);
  }

  callback();
};