[Library]: Change userInfo: Make request only if subject is null(and token exists). After every navigation check token existance

git-svn-id: https://svn.driver.research-infrastructures.eu/driver/dnet40/modules/uoa-services-library/trunk/ng-openaire-library/src/app@57788 d315682c-612b-4755-9ff5-7f18f6832af3

login/userMini.component.ts

@@ -1,4 +1,4 @@
-import {Component, ElementRef, Input} from '@angular/core';
+import {Component, ElementRef, Input, OnChanges, OnInit, SimpleChanges} from '@angular/core';
 import {ActivatedRoute, Router} from '@angular/router';
 import {Location} from '@angular/common';
 import {User,Session} from './utils/helper.class';
@@ -70,7 +70,7 @@ import{EnvProperties} from '../utils/properties/env-properties';
     `
 })
 
-export class UserMiniComponent {
+export class UserMiniComponent implements OnInit, OnChanges{
     @Input() user: User;
     public loggedIn: boolean = false;
     public isAuthorized: boolean = false;
@@ -98,6 +98,13 @@ export class UserMiniComponent {
 
 
     }
+
+    ngOnChanges(changes: SimpleChanges): void {
+        if(changes.user) {
+            this.initialize();
+        }
+    }
+
     ngOnDestroy(){
       if(this.sub) {
         this.sub.unsubscribe();

services/user-management.service.ts

@@ -1,26 +1,45 @@
 import {Injectable} from '@angular/core';
 import {HttpClient} from '@angular/common/http';
-import {Observable, of} from "rxjs";
+import {BehaviorSubject, Observable, of} from "rxjs";
 import {COOKIE, User} from "../login/utils/helper.class";
 import {catchError, map, timeout} from "rxjs/operators";
+import {NavigationEnd, Router} from "@angular/router";
 
 @Injectable({
   providedIn: 'root'
 })
 export class UserManagementService {
 
-  constructor(private http: HttpClient) {
+  private getUserInfoSubject: BehaviorSubject<User> = new BehaviorSubject<User>(null);
+
+  constructor(private http: HttpClient,
+              private router: Router) {
+    this.router.events.subscribe( event => {
+      if(event instanceof NavigationEnd) {
+        const token = COOKIE.getCookie('AccessToken');
+        if(!token && this.getUserInfoSubject.getValue() !== null) {
+          this.getUserInfoSubject.next(null);
+        }
+      }
+    })
   }
 
   public getUserInfo(url: string): Observable<User> {
     const token = COOKIE.getCookie('AccessToken');
     if(!token) {
-      return of(null);
-    } else return this.http.get<User>(url + token).pipe(map(userInfo => {
-      return this.parseUserInfo(userInfo);
-    })).pipe(timeout(2000), catchError(() => {
-      return of(null);
-    }));
+      this.getUserInfoSubject.next(null);
+    } else {
+      if(this.getUserInfoSubject.getValue() === null) {
+        this.http.get<User>(url + token).pipe(map(userInfo => {
+          return this.parseUserInfo(userInfo);
+        })).pipe(timeout(2000), catchError(() => {
+          return of(null);
+        })).subscribe(user => {
+          this.getUserInfoSubject.next(user);
+        });
+      }
+    }
+    return this.getUserInfoSubject.asObservable();
   }
 
   private parseUserInfo(info: any) {