brewman/overlord/src/app/role/role.service.ts

import { Injectable } from '@angular/core';
import { HttpClient, HttpHeaders } from '@angular/common/http';
import { ErrorLoggerService } from '../core/error-logger.service';
import { catchError } from 'rxjs/operators';
import { Observable } from 'rxjs/internal/Observable';
import { Role } from './role';

const httpOptions = {
  headers: new HttpHeaders({'Content-Type': 'application/json'})
};
const url = '/api/roles';
const serviceName = 'RoleService';

@Injectable({
  providedIn: 'root'
})
export class RoleService {
  constructor(private http: HttpClient, private log: ErrorLoggerService) {
  }

  get(id: string): Observable<Role> {
    const getUrl: string = (id === null) ? `${url}` : `${url}/${id}`;
    return <Observable<Role>>this.http.get<Role>(getUrl)
      .pipe(
        catchError(this.log.handleError(serviceName, `get id=${id}`))
      );
  }

  list(): Observable<Role[]> {
    return <Observable<Role[]>>this.http.get<Role[]>(`${url}/list`)
      .pipe(
        catchError(this.log.handleError(serviceName, 'list'))
      );
  }

  save(role: Role): Observable<Role> {
    return <Observable<Role>>this.http.post<Role>(`${url}`, role, httpOptions)
      .pipe(
        catchError(this.log.handleError(serviceName, 'save'))
      );
  }

  update(role: Role): Observable<Role> {
    return <Observable<Role>>this.http.put<Role>(`${url}/${role.id}`, role, httpOptions)
      .pipe(
        catchError(this.log.handleError(serviceName, 'update'))
      );
  }

  saveOrUpdate(role: Role): Observable<Role> {
    if (!role.id) {
      return this.save(role);
    } else {
      return this.update(role);
    }
  }

  delete(id: string): Observable<Role> {
    return <Observable<Role>>this.http.delete<Role>(`${url}/${id}`, httpOptions)
      .pipe(
        catchError(this.log.handleError(serviceName, 'delete'))
      );
  }
}