130 create-lazyman

create-lazyman.js

// https://bigfrontend.dev/problem/create-lazyman
// interface Laziness {
//   sleep: (time: number) => Laziness
//   sleepFirst: (time: number) => Laziness
//   eat: (food: string) => Laziness
// }

/**
 * @param {string} name
 * @param {(log: string) => void} logFn
 * @returns {Laziness}
 */
function LazyMan(name, logFn) {

  class Laziness {
    messages = []
    queue = false;
    constructor(name,fn){
      this.name = name;
      this.fn = fn;
      this.messages.push(`Hi, I'm ${this.name}.`);
      this.display();
      return this;
    }
    eat(food){
      this.messages.push(`Eat ${food}.`);
      this.display();
      return this;
    }
    sleep(time){
      this.messages.push(time);
      this.display();
      return this
    }
    sleepFirst(time){
      this.messages.unshift(time);
      this.display();
      return this
    }
    display(){

      const next = (element) => {
        if(element){
          const nextElement = this.messages.shift();
          if(typeof element !== 'number'){
            this.fn(element);
            next(nextElement);
          }else{
            setTimeout(()=> {
              const phrase = element === 1 ?
              `Wake up after ${element} second.` : `Wake up after ${element} seconds.`
              this.fn(phrase)
              next(nextElement);
            }, element * 1000);
          }
        }
      }

      if(!this.queue){
        this.queue = true;
        setTimeout(()=>{
          const element = this.messages.shift();
           next(element)
        });
      }
    }
  }
  return new Laziness(name, logFn);
}

// LazyMan('Jack', console.log).eat('banana').sleepFirst(10).eat('apple').sleep(1)
// LazyMan('Jack', console.log).eat('banana').eat('apple').sleepFirst(2)
LazyMan('Jack', console.log).eat('banana').sleepFirst(10).eat('apple').sleep(1)