feat: add groups view page (datatable-tabs) (#793)

Fixes: #776
Fixes: #777
Fixes: #791

src/app/groups/common-resolvers/group-datatables.resolver.ts

@@ -0,0 +1,30 @@
+/** Angular Imports */
+import { Injectable } from '@angular/core';
+import { Resolve, ActivatedRouteSnapshot } from '@angular/router';
+
+/** rxjs Imports */
+import { Observable } from 'rxjs';
+
+/** Custom Services */
+import { GroupsService } from '../groups.service';
+
+/**
+ * Group Datatables data resolver.
+ */
+@Injectable()
+export class GroupDatatablesResolver implements Resolve<Object> {
+
+  /**
+   * @param {GroupsService} GroupsService Groups service.
+   */
+  constructor(private groupsService: GroupsService) { }
+
+  /**
+   * Returns the Group's Datatables data.
+   * @returns {Observable<any>}
+   */
+  resolve(): Observable<any> {
+    return this.groupsService.getGroupDatatables();
+  }
+
+}