@skiff-org/trawler/src/async.js

A modern search library for Skiff

//import { promise as Promise } from "./polyfill.js";
import { is_function } from './common.js';

export default function(prototype){
  register(prototype, 'add');
  register(prototype, 'append');
  register(prototype, 'search');
  register(prototype, 'update');
  register(prototype, 'remove');
}

function register(prototype, key){
  prototype[key + 'Async'] = function(){
    /** @type {IndexInterface|DocumentInterface} */
    const self = this;
    const args = /*[].slice.call*/(arguments);
    const arg = args[args.length - 1];
    let callback;

    if(is_function(arg)){
      callback = arg;
      delete args[args.length - 1];
    }

    const promise = new Promise(function(resolve){
      setTimeout(function(){
        self.async = true;
        const res = self[key].apply(self, args);
        self.async = false;
        resolve(res);
      });
    });

    if(callback){
      promise.then(callback);
      return this;
    }
    else{
      return promise;
    }
  };
}