organize services into services folder

src/app/services/db-status.service.ts

@@ -0,0 +1,45 @@
+import { Injectable } from '@angular/core';
+import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http';
+import { CookieService } from './cookie.service';
+
+import { Observable, of } from 'rxjs';
+import { map, retry, catchError } from 'rxjs/operators';
+
+import { environment } from '../../environments/environment'
+import { apiURL, apiRetry } from '../api-utils'
+import Folder from '../folder'
+
+@Injectable({
+  providedIn: 'root'
+})
+export class DbStatusService {
+  private dbStatusUrl = environment.production ? apiURL + 'rest/db/status' : 'api/dbStatus';
+
+  constructor(private http: HttpClient, private cookieService: CookieService) { }
+
+  getFolderStatus(id: string): Observable<Folder.Status> {
+    let httpOptions: { params: HttpParams };
+    if (id) {
+      httpOptions = {
+        params: new HttpParams().set('folder', id)
+      };
+    } else { }
+
+    return this.http
+      .get<Folder.Status>(this.dbStatusUrl, httpOptions)
+      .pipe(
+        retry(apiRetry),
+        map(res => {
+          // Remove from array in developement
+          // in-memory-web-api returns arrays
+          if (!environment.production) {
+            const a: any = res as any;
+            if (a.length > 0) {
+              res = res[0];
+            }
+          }
+          return res;
+        })
+      );
+  }
+}