feat(package): added an alert container for user's feedback

Author: AnthonyNahas

src/auth/module/components/alerts-container/ngb-alerts-container.component.html

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+<p *ngFor="let alert of alerts">
+  <ngb-alert [type]="alert.type" (close)="closeAlert(alert)">{{ alert.message }}</ngb-alert>
+</p>

src/auth/module/components/alerts-container/ngb-alerts-container.component.scss

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+:host{
+  display: block;
+}

src/auth/module/components/alerts-container/ngb-alerts-container.component.spec.ts

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+import {async, ComponentFixture, TestBed} from '@angular/core/testing';
+
+import {NgbAlertsContainerComponent} from './ngb-alerts-container.component';
+import {NgbModule} from '@ng-bootstrap/ng-bootstrap';
+
+describe('AlertsContainerComponent', () => {
+  let component: NgbAlertsContainerComponent;
+  let fixture: ComponentFixture<NgbAlertsContainerComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      imports: [NgbModule.forRoot()],
+      declarations: [NgbAlertsContainerComponent]
+    })
+      .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(NgbAlertsContainerComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/auth/module/components/alerts-container/ngb-alerts-container.component.ts

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+import {Component, Input, OnInit} from '@angular/core';
+import {IAlert} from '../../../..';
+
+@Component({
+  selector: 'ngb-alerts-container',
+  templateUrl: './ngb-alerts-container.component.html',
+  styleUrls: ['./ngb-alerts-container.component.scss']
+})
+export class NgbAlertsContainerComponent {
+
+  @Input()
+  public alerts: Array<IAlert> = [];
+
+  public closeAlert(alert: IAlert) {
+    const index: number = this.alerts.indexOf(alert);
+    this.alerts.splice(index, 1);
+  }
+}