update folder structure based on style guide

src/app/workflowitems-edit-page/item-from-workflow.resolver.ts

@@ -0,0 +1,43 @@
+import { Injectable } from '@angular/core';
+import { ActivatedRouteSnapshot, Resolve, RouterStateSnapshot } from '@angular/router';
+import { Observable } from 'rxjs';
+import { RemoteData } from '../core/data/remote-data';
+import { Item } from '../core/shared/item.model';
+import { followLink } from '../shared/utils/follow-link-config.model';
+import { getFirstCompletedRemoteData } from '../core/shared/operators';
+import { Store } from '@ngrx/store';
+import { WorkflowItemDataService } from '../core/submission/workflowitem-data.service';
+import { WorkflowItem } from '../core/submission/models/workflowitem.model';
+import { switchMap } from 'rxjs/operators';
+
+/**
+ * This class represents a resolver that requests a specific item before the route is activated
+ */
+@Injectable()
+export class ItemFromWorkflowResolver implements Resolve<RemoteData<Item>> {
+  constructor(
+    private workflowItemService: WorkflowItemDataService,
+    protected store: Store<any>
+  ) {
+  }
+
+  /**
+   * Method for resolving an item based on the parameters in the current route
+   * @param {ActivatedRouteSnapshot} route The current ActivatedRouteSnapshot
+   * @param {RouterStateSnapshot} state The current RouterStateSnapshot
+   * @returns Observable<<RemoteData<Item>> Emits the found item based on the parameters in the current route,
+   * or an error if something went wrong
+   */
+  resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<RemoteData<Item>> {
+    const itemRD$ = this.workflowItemService.findById(route.params.id,
+      true,
+      false,
+      followLink('item'),
+    ).pipe(
+      getFirstCompletedRemoteData(),
+      switchMap((wfiRD: RemoteData<WorkflowItem>) => wfiRD.payload.item as Observable<RemoteData<Item>>),
+      getFirstCompletedRemoteData()
+    );
+    return itemRD$;
+  }
+}