improve go back

src/app/services/navigation.service.ts

@@ -6,7 +6,10 @@ import { Router, NavigationEnd } from '@angular/router'
 export class NavigationService {
   private history: string[] = []
 
-  constructor(private router: Router, private location: Location) {
+  constructor(
+    private router: Router, 
+    private location: Location
+  ) {
     this.router.events.subscribe((event) => {
       if (event instanceof NavigationEnd) {
         this.history.push(event.urlAfterRedirects)

src/app/services/route.service.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { RouteService } from './route.service';
+
+describe('RouteService', () => {
+  let service: RouteService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(RouteService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

src/app/services/route.service.ts

@@ -0,0 +1,52 @@
+import { Injectable } from '@angular/core';
+import { NavigationEnd, Router, NavigationStart } from '@angular/router';
+
+
+@Injectable({
+  providedIn: 'root'
+})
+export class RouteService {
+
+  history: any = [];
+  isGoBack = false;
+
+  constructor(
+    private router: Router,
+  ) {
+    this.router.events.forEach((event) => {
+      if (event instanceof NavigationEnd) {
+
+        const lastRoute = this.history.slice(-1)
+
+        if(event.url != lastRoute) {
+          this.history.push(event.url)
+        }
+
+      }
+    });
+
+    window['RouteService'] = this
+
+  }
+
+  /**
+   * @param url [string] incase no history to go back
+   * @param option [Object] some options to the url
+   */
+  goBack(url = null, option: object = {}) {
+    if(this.history.length >= 2) {
+      this.history.pop();
+      const goTo = this.history.pop();
+      this.isGoBack = true;
+      this.router.navigate([goTo]);
+    } else if(url) {
+      this.goTo({url})
+    }
+
+  }
+
+  goTo({url}) {
+    this.router.navigate([url]);
+  }
+
+}