[ADF-4183] improved auth redirection (#4399)

* base auth guard implementation

* remove code duplication

* unit test fixes

lib/core/login/components/login.component.ts

@@ -20,8 +20,8 @@ import {
     Input, OnInit, Output, TemplateRef, ViewEncapsulation
 } from '@angular/core';
 import { AbstractControl, FormBuilder, FormGroup, Validators } from '@angular/forms';
-import { Router } from '@angular/router';
-
+import { Router, ActivatedRoute, Params } from '@angular/router';
+import { Location } from '@angular/common';
 import { AuthenticationService } from '../../services/authentication.service';
 import { LogService } from '../../services/log.service';
 import { TranslationService } from '../../services/translation.service';
@@ -140,7 +140,9 @@ export class LoginComponent implements OnInit {
         private logService: LogService,
         private router: Router,
         private appConfig: AppConfigService,
-        private userPreferences: UserPreferencesService
+        private userPreferences: UserPreferencesService,
+        private location: Location,
+        private route: ActivatedRoute
     ) {
         this.initFormError();
         this.initFormFieldsMessages();
@@ -154,6 +156,17 @@ export class LoginComponent implements OnInit {
             }
         }
 
+        if (this.authService.isEcmLoggedIn() || this.authService.isBpmLoggedIn()) {
+            this.location.forward();
+        } else {
+            this.route.queryParams.subscribe((params: Params) => {
+                const url = params['redirectUrl'];
+                const provider = this.appConfig.get<string>(AppConfigValues.PROVIDERS);
+
+                this.authService.setRedirect({ provider, url });
+              });
+        }
+
         if (this.hasCustomFieldsValidation()) {
             this.form = this._fb.group(this.fieldsValidation);
         } else {