Sample code for "Building RESTful Web APIs with Dart, Aqueduct and PostgreSQL (Part 2)" post on Medium (5)

books_controller.dart

class BooksController extends HTTPController {
  @httpGet
  Future<Response> getAll() async => new Response.ok(books);

  @httpGet
  Future<Response> getSingle(@HTTPPath("index") int idx) async {
    if (idx < 0 || idx > books.length - 1) { // index out of range
      return new Response.notFound(body: 'Book does not exist');
    }
    return new Response.ok(books[idx]);
  }

  @httpPost
  Future<Response> addSingle() async {
    var book = request.body.asMap(); // `request` represents the current request. This is a property inside HTTPController base class
    books.add(book);
    return new Response.ok(book);
  }

  @httpPut
  Future<Response> replaceSingle(@HTTPPath("index") int idx) async {
    if (idx < 0 || idx > books.length - 1) { // index out of range
      return new Response.notFound(body: 'Book does not exist');
    }
    var body = request.body.asMap();
    for (var i = 0; i < books.length; i++) {
      if (i == idx) {
        books[i]["title"] = body["title"];
        books[i]["author"] = body["author"];
        books[i]["year"] = body["year"];
      }
    }
    return new Response.ok(body);
  }

  @httpDelete
  Future<Response> delete(@HTTPPath("index") int idx) async {
    if (idx < 0 || idx > books.length - 1) { // index out of range
      return new Response.notFound(body: 'Book does not exist');
    }
    books.removeAt(idx);
    return new Response.ok('Book successfully deleted.');
  }
}