Queue Promises

queue-promise.ts

let _queue: Promise<any> = Promise.resolve(true);

const queuePromise = (operation: (value: any) => Promise<any>) => {
  return new Promise((resolve, reject) => {
    _queue = _queue
      .then(operation)
      .then(resolve)
      .catch(reject);
  });
};

export default queuePromise;

//
// usage: 
// queuePromise(() => promise1.then()).then(finishExecution)
// queuePromise((result1) => promise2.then()).then(finishExecution)
// queuePromise((result2) => promiseN.then()).then(finishExecution)
//
// finishExecution will be run one time. Can be declared in the any queue().then
//