major refactoring

added universal
added api

src/app/_service/api.service.ts

@@ -0,0 +1,25 @@
+import {Inject, Injectable, PLATFORM_ID} from '@angular/core';
+import {Observable} from "rxjs";
+import {CurrentStatus, MetaInfo} from "../_data/data";
+import {HttpClient} from "@angular/common/http";
+import {environment} from "../../environments/environment";
+import {isPlatformBrowser} from "@angular/common";
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ApiService {
+  private readonly api;
+
+  constructor(private http: HttpClient, @Inject(PLATFORM_ID) platformId: Object) {
+    this.api = isPlatformBrowser(platformId) ? '/api' : environment.serverUrl + '/api';
+  }
+
+  public getServiceStates(): Observable<CurrentStatus> {
+    return this.http.get<CurrentStatus>(this.api+ '/status');
+  }
+
+  public getMetaInfo(): Observable<MetaInfo> {
+    return this.http.get<MetaInfo>(this.api+ '/info');
+  }
+}