Modified log-in component to set the redirect url only if one has not been set already.

src/app/shared/log-in/log-in.component.spec.ts

@@ -118,6 +118,23 @@ describe('LogInComponent', () => {
     expect(authService.setRedirectUrl).toHaveBeenCalled();
   });
 
+  it('should not set the redirect url because one already exists',  () => {
+    fixture.detectChanges();
+
+    const authService: AuthService = TestBed.get(AuthService);
+    authService.setRedirectUrl('/submit')
+
+    // set FormControl values
+    component.form.controls.email.setValue('user');
+    component.form.controls.password.setValue('password');
+
+    spyOn(authService, 'setRedirectUrl');
+
+    component.submit();
+
+    expect(authService.setRedirectUrl).not.toHaveBeenCalled();
+  });
+
 });
 
 /**

src/app/shared/log-in/log-in.component.ts

@@ -1,4 +1,4 @@
-import { filter, map, takeWhile } from 'rxjs/operators';
+import {filter, map, take, takeWhile, tap} from 'rxjs/operators';
 import { Component, OnDestroy, OnInit } from '@angular/core';
 import { FormBuilder, FormGroup, Validators } from '@angular/forms';
 
@@ -17,7 +17,7 @@ import {
 } from '../../core/auth/selectors';
 import { CoreState } from '../../core/core.reducers';
 
-import { isNotEmpty } from '../empty.util';
+import {isEmpty, isNotEmpty} from '../empty.util';
 import { fadeOut } from '../animations/fade';
 import { AuthService } from '../../core/auth/auth.service';
 import {Router} from '@angular/router';
@@ -185,13 +185,17 @@ export class LogInComponent implements OnDestroy, OnInit {
     email.trim();
     password.trim();
 
-    // add the current url to store for later redirect.
+    this.authService.getRedirectUrl().pipe(
-    this.authService.setRedirectUrl(this.router.url);
+      take(1)).
-
+      subscribe((r) => {
+        // Set the redirect url if none exists.
+        if (isEmpty(r)) {
+          this.authService.setRedirectUrl(this.router.url)
+        }
         // dispatch AuthenticationAction
         this.store.dispatch(new AuthenticateAction(email, password));
-
         // clear form
         this.form.reset();
+      });
   }
 }

src/app/shared/testing/auth-service-stub.ts

@@ -10,6 +10,7 @@ export class AuthServiceStub {
 
   token: AuthTokenInfo = new AuthTokenInfo('token_test');
   private _tokenExpired = false;
+  private redirectUrl;
 
   constructor() {
     this.token.expires = Date.now() + (1000 * 60 * 60);
@@ -88,7 +89,11 @@ export class AuthServiceStub {
   }
 
   setRedirectUrl(url: string) {
-    return;
+    this.redirectUrl = url;
+  }
+
+  getRedirectUrl() {
+    return observableOf(this.redirectUrl);
   }
 
   public storeToken(token: AuthTokenInfo) {