import { Injectable } from '@angular/core'; import { ActivatedRouteSnapshot, Resolve, RouterStateSnapshot } from '@angular/router'; import { Observable } from 'rxjs'; import { RemoteData } from '../core/data/remote-data'; import { hasValue } from '../shared/empty.util'; import { find } from 'rxjs/operators'; import { followLink } from '../shared/utils/follow-link-config.model'; import { WorkflowItemDataService } from '../core/submission/workflowitem-data.service'; import { WorkflowItem } from '../core/submission/models/workflowitem.model'; /** * This class represents a resolver that requests a specific workflow item before the route is activated */ @Injectable() export class WorkflowItemPageResolver implements Resolve<RemoteData<WorkflowItem>> { constructor(private workflowItemService: WorkflowItemDataService) { } /** * Method for resolving a workflow 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 workflow item based on the parameters in the current route, * or an error if something went wrong */ resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<RemoteData<WorkflowItem>> { return this.workflowItemService.findById(route.params.id, followLink('item'), ).pipe( find((RD) => hasValue(RD.error) || RD.hasSucceeded), ); } }