Untitled

/* Design a basic eccomerce app with following methods
* CreateProduct
* CreateOrder
* getOrder
* CancelOrder
* deleteProduct */

let products = []
let orders=[];
let counter = 1;
let orderCounter = 0;

function createProduct(brand, name, desc, price, quantity){
	
	let pExists = products.find(p => p.name == name && brand == brand )
  
  let product = {
    "id": counter,
    "name": name,
    "desc": desc,
    "price" : price,
    "qty": quantity
    }
  if(!pExists){  
  	counter = counter + 1
  	products.push(product)
  }	
  else{
  	throw Error("product already exists")
  }  
  return product;
}

console.log(createProduct("nokia", "n90", " mobile phone", 12000, 10))
console.log(createProduct("nokia", "n80", " mobile phone", 12000, 10))

console.log(createOrder([{"id": 1, "qty": 5}, {"id": 2, "qty": 1}]))
console.log(createOrder([{"id": 1, "qty": 4}, {"id": 2, "qty": 11}]))
console.log(createOrder([{"id": 1, "qty": 4}, {"id": 2, "qty": 1}]))

function createOrder(orderItems){
		let orderObj = [];
		for (const o of orderItems){
    		let product = products.find(p => p.id == o.id);
        
        
        if(product.qty >= o.qty){       
        
          let tmpProduct = {
            "name" : product.name,
            "desc" : product.desc,
            "price" :  product.price,
            "totalPrice": o.qty * product.price,
            "qty": o.qty
          }
          orderObj.push(tmpProduct)
          
          product.qty = product.qty - o.qty
          
        }
        else{
        	throw Error("product qty exceeds inventory qty")
        }
    }
	return orderObj;
}