const { EventEmitter } = require('events');
var input = {
"orders": [
[
"Pepperoni",
"Mushrooms",
"Sausage"
]
]
};
/**
* Restaurant class is reponsible for processing orders, it extends eventEmitter
*/
class Restaurant extends EventEmitter {
constructor(doughChefs, toppingChefs, isOvenFree, waiters, orders, report) {
super();
this.doughChefs = doughChefs;
this.toppingChefs = toppingChefs;
this.isOvenFree = isOvenFree;
this.waiters = waiters;
this.orders = orders;
this.servedOrders = 0;
this.report = "\n========= Report ========= \n";
this.orderReport = "\n========= Report for each order ========= \n";
this.orderTimings = {};
this.currentOrder = 0;
this.completed = 0;
}
/**
* This methods handles order dough
* @param {Order} order
*/
dough(order) {
console.log('dough: ' + order + new Date());
this.currentOrder++
this.orderTimings[`${this.currentOrder}`] = ["Started At : " + new Date()]
setTimeout(() => {
this.noOfToppings = order.length
this.doughChefs++
this.emit('topping', order);
}, 7000)
}
/**
* This methods handles order topping
* @param {Order} order
*/
topping(order) {
console.log('topping: ' + order + new Date());
setTimeout(() => {
if (this.noOfToppings <= 0 || this.noOfToppings < 6) {
this.emit('oven', order);
} else {
this.noOfToppings -= 6
this.emit('topping', order);
}
}, 4000);
}
/**
* This methods handles order oven
* @param {Order} order
*/
oven(order) {
if (this.isOvenFree) {
this.isOvenFree = false;
console.log('oven: ' + order + new Date());
setTimeout(() => {
this.emit('serve', order);
}, 10000);
} else {
setTimeout(() => {
this.emit('oven', order);
}, 10000);
}
}
/**
* This methods handles order serving
* @param {Order} order
*/
serve(order) {
this.isOvenFree = true;
if (this.Waiters > 0) {
this.Waiters--
setTimeout(() => {
this.Waiters++
this.servedOrders++
console.log('served: ' + order + new Date());
}, 5000);
} else {
this.Waiters--
setTimeout(() => {
console.log('served: ' + order + new Date())
this.servedOrders++
this.areThereMoreOrders(this.currentOrder)
}, 5000);
}
}
areThereMoreOrders() {
this.completed++
this.orderTimings[`${this.completed}`].push("Completed At : " + new Date())
this.orderTimings[`${this.completed}`].push('Took more than 26s')
this.Waiters++
if (this.orders.length === this.servedOrders) {
this.report += `\nServed all ${this.servedOrders} orders at : ${new Date()}`
console.log(this.report)
console.timeEnd("Order processing took ")
console.log("\n \n")
console.log(this.orderReport)
console.log(this.orderTimings)
}
return
}
/**
* This is starting point, it will process order
*/
processOrder() {
console.time("Order processing took ")
console.log(`\nStarting Processing ${this.orders.length} orders\n`)
this.report += `\nStarted ${this.orders.length} orders processing at : ${new Date()}`
for (let i = 0; i < this.orders.length; i++) {
if (this.doughChefs > 0) {
this.emit('dough', input.orders[i]);
this.doughChefs--
} else {
setTimeout(() => {
this.emit('dough', input.orders[i]);
this.doughChefs--
}, 7000)
}
}
}
}
const restaurant = new Restaurant(2, 3, true, 2, input.orders);
restaurant.on('dough', restaurant.dough);
restaurant.on('topping', restaurant.topping);
restaurant.on('oven', restaurant.oven);
restaurant.on('serve', restaurant.serve);
// Process order
restaurant.processOrder()
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