my-dspace-configuration.service.ts

import { Injectable } from '@angular/core';

import { combineLatest, Observable } from 'rxjs';
import { first, map } from 'rxjs/operators';
import { MyDSpaceConfigurationValueType } from './my-dspace-configuration-value-type';
import { RoleService } from '../core/roles/role.service';
import { SearchConfigurationOption } from '../+search-page/search-switch-configuration/search-configuration-option.model';

/**
 * Service that performs all actions that have to do with the current search configuration
 */
@Injectable()
export class MyDSpaceConfigurationService {

  private isAdmin$: Observable<boolean>;
  private isController$: Observable<boolean>;
  private isSubmitter$: Observable<boolean>;

  /**
   * @constructor
   */
  constructor(protected roleService: RoleService) {
    this.isSubmitter$ = this.roleService.isSubmitter();
    this.isController$ = this.roleService.isController();
    this.isAdmin$ = this.roleService.isAdmin();
  }

  public getAvailableConfigurationTypes(): Observable<MyDSpaceConfigurationValueType[]> {
    return combineLatest(this.isSubmitter$, this.isController$, this.isAdmin$).pipe(
      first(),
      map(([isSubmitter, isController, isAdmin]: [boolean, boolean, boolean]) => {
        const availableConf: MyDSpaceConfigurationValueType[] = [];
        if (isSubmitter) {
          availableConf.push(MyDSpaceConfigurationValueType.Workspace);
        }
        if (isController || isAdmin) {
          availableConf.push(MyDSpaceConfigurationValueType.Workflow);
        }
        return availableConf;
      }));
  }

  public getAvailableConfigurationOptions(): Observable<SearchConfigurationOption[]> {
    return this.getAvailableConfigurationTypes().pipe(
      first(),
      map((availableConfigurationTypes: MyDSpaceConfigurationValueType[]) => {
        const configurationOptions: SearchConfigurationOption[] = [];
        availableConfigurationTypes.forEach((type) => {
          const value = type;
          const label = `mydspace.show.${value}`;
          configurationOptions.push({ value, label });
        });
        return configurationOptions;
      })
    )
  }

}