Refactor authentication flow

projects/common/src/fm/components/auth-callback/auth-callback.component.ts

@@ -1,12 +1,19 @@
-import { Component } from '@angular/core';
-
-
-@Component({
-    selector: 'fm-auth-callback',
-    template:'<div></div>'
-})
-export class AuthCallbackComponent {
-
-  constructor() {
-  }
-}
+import { Component } from '@angular/core';
+import { Router } from '@angular/router';
+import { OAuthService } from 'angular-oauth2-oidc';
+import { Location} from '@angular/common';
+
+@Component({
+    selector: 'fm-auth-callback',
+    template:'<div></div>'
+})
+export class AuthCallbackComponent {
+
+  constructor(private router$: Router,private oauthService$:OAuthService) {
+    oauthService$.loadDiscoveryDocument().then(() => {
+      oauthService$.tryLoginCodeFlow().then(() => {
+        router$.navigateByUrl((oauthService$.state && oauthService$.state!="")?decodeURIComponent(oauthService$.state):"");
+      });    
+    })
+  }
+}