Create vending machine using ng2

db.json

@@ -25,4 +25,4 @@
       "remaining": 10
     }
   ]
-}
+}

src/app/app.component.html

@@ -2,3 +2,5 @@ <h1>
   {{title}}
 </h1>
 <app-insert-coin></app-insert-coin>
+<app-select-item></app-select-item>
+<app-dispense-item></app-dispense-item>

src/app/app.module.ts

@@ -8,11 +8,15 @@ import { InsertCoinComponent } from './insert-coin/insert-coin.component';
 
 import { ItemService } from './item/item.service';
 import { BalanceService } from './balance/balance.service';
+import { SelectItemComponent } from './select-item/select-item.component';
+import { DispenseItemComponent } from './dispense-item/dispense-item.component';
 
 @NgModule({
   declarations: [
     AppComponent,
-    InsertCoinComponent
+    InsertCoinComponent,
+    SelectItemComponent,
+    DispenseItemComponent
   ],
   imports: [
     BrowserModule,

src/app/balance/balance.service.ts

@@ -8,23 +8,23 @@ export class BalanceService {
   private subject: Subject<number> = new Subject<number>();
 
   constructor() { }
-  
+
   private updateSubject(): void {
     this.subject.next(this.balance);
   }
 
-  setBalance(amount): void { 
-  	this.balance = amount; 
+  setBalance(amount): void {
+  	this.balance = amount;
   	this.updateSubject();
   }
-  
-  getBalance(): number { 
-  	return this.balance; 
+
+  getBalance(): number {
+  	return this.balance;
   }
-  
-  addBalance(amount): void { 
+
+  addBalance(amount): void {
   	this.balance += amount;
-  	this.updateSubject(); 
+  	this.updateSubject();
   }
 
   deductBalance(amount): void {

src/app/dispense-item/dispense-item.component.html

@@ -0,0 +1 @@
+<button class="button" (click)='onDispenseItem()'>Dispense</button>

src/app/dispense-item/dispense-item.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { DispenseItemComponent } from './dispense-item.component';
+
+describe('DispenseItemComponent', () => {
+  let component: DispenseItemComponent;
+  let fixture: ComponentFixture<DispenseItemComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ DispenseItemComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(DispenseItemComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/dispense-item/dispense-item.component.ts

@@ -0,0 +1,39 @@
+import { Component, OnInit } from '@angular/core';
+import { ItemService } from '../item/item.service';
+import { BalanceService } from '../balance/balance.service';
+
+@Component({
+  selector: 'app-dispense-item',
+  templateUrl: './dispense-item.component.html',
+  styleUrls: ['./dispense-item.component.css']
+})
+export class DispenseItemComponent implements OnInit {
+  public items;
+  coinBalance = 0;
+  public selectedItem;
+  constructor(public itemService: ItemService, public balanceService: BalanceService) { }
+
+  ngOnInit() {
+    this.itemService.onItemsRetrieved((items) => this.items = items);
+    this.balanceService.onBalanceUpdated((balance) => {
+      this.coinBalance = balance;
+    });
+  }
+
+  onDispenseItem() {
+    this.selectedItem = this.itemService.getSelectedItem();
+    if (this.coinBalance >= this.selectedItem.cost && this.selectedItem.remaining > 0) {
+      this.itemService.dispenseItem((item) => {
+        alert(`Thank you for purchasing a ${item.name}!!`);
+        this.balanceService.deductBalance(0);
+      });
+      this.balanceService.setBalance(0);
+    } else if (this.selectedItem.remaining <= 0){
+      this.itemService.dispenseItem((item) => {
+        alert(`${item.name} is Sold Out!!`);
+      });
+    } else {
+      alert('You have insufficient balance!');
+    }
+  }
+}

src/app/insert-coin/insert-coin.component.html

@@ -2,3 +2,5 @@
 <button class="button -yellow" (click)='addBalance(.05)'>05c</button>
 <button class="button -blue" (click)='addBalance(.10)'>10c</button>
 <button class="button -green" (click)='addBalance(.25)'>25c</button>
+<button class="button -green" (click)='addBalance(1)'>$1</button>
+<button class="button" (click)='returnCoins()'>Coin Return</button>

src/app/insert-coin/insert-coin.component.ts

@@ -21,4 +21,8 @@ export class InsertCoinComponent implements OnInit {
   	this.balanceService.addBalance(amount);
   }
 
+  returnCoins() {
+    this.balanceService.setBalance(0);
+    alert('Coins returned!');
+  }
 }

src/app/select-item/select-item.component.css

@@ -0,0 +1,4 @@
+li {
+  color: white;
+  list-style: none;
+}

src/app/select-item/select-item.component.html

@@ -0,0 +1,4 @@
+<li *ngFor='let item of items'>
+  <input type="radio"[value]='item.id' name="soda" (change)='onItemSelected(item)'>
+  {{item.name}} costs {{item.cost}}
+</li>

src/app/select-item/select-item.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { SelectItemComponent } from './select-item.component';
+
+describe('SelectItemComponent', () => {
+  let component: SelectItemComponent;
+  let fixture: ComponentFixture<SelectItemComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ SelectItemComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(SelectItemComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/select-item/select-item.component.ts

@@ -0,0 +1,23 @@
+import { Component, OnInit } from '@angular/core';
+import { ItemService } from '../item/item.service';
+
+@Component({
+  selector: 'app-select-item',
+  templateUrl: './select-item.component.html',
+  styleUrls: ['./select-item.component.css']
+})
+export class SelectItemComponent implements OnInit {
+  public items;
+  public selectedItem;
+  constructor(public itemService: ItemService) { }
+
+  ngOnInit() {
+    this.itemService.onItemsRetrieved((items)=> {
+      this.items = items;
+    })
+  }
+
+  onItemSelected(item) {
+    this.itemService.setSelectedItem(item);
+  }
+}