Add Operation Service.

src/operations/operation.service.ts

@@ -0,0 +1,43 @@
+// vim: set tw=80 ts=2 sw=2 sts=2 :
+
+import { Injectable } from '@angular/core';
+import { Observable } from 'rxjs/Rx';
+
+import { Restangular } from "ngx-restangular";
+
+import { Operation } from './operation';
+
+@Injectable()
+export class OperationService {
+  constructor(
+    private restangular: Restangular
+  ) {}
+
+  private all() {
+    return this.restangular.all('operation');
+  }
+
+  private one(id: number) {
+    return this.restangular.one('operation', id);
+  }
+
+  query(): Observable<Operation[]> {
+    return this.all().getList();
+  }
+  
+  get(id: number): Observable<Operation> {
+    return this.one(id).get();
+  }
+
+  create(operation: Operation): Observable<Operation> {
+    return this.all().post(operation);
+  }
+
+  update(operation: Operation): Observable<Operation> {
+    return this.one(operation.id).post(null, operation);
+  }
+
+  delete(operation: Operation): Observable<Operation> {
+    return this.one(operation.id).delete();
+  }
+}