AngularJS Essentials

Dependency Injection and Services
};
});
retrieveCars();
});
Creating an HTTP facade
Now, we have the opportunity to evolve our design by introducing a service that
will act as a facade and interact directly with the backend. The mapping of each
URL pattern should not be under the controller's responsibility; otherwise, it could
generate a huge amount of duplicated code and a high cost of maintenance.
In order to increase the cohesion of our controller, we moved the code responsible to
make the calls to the backend of the parkingHttpFacade service, as follows:
services.js
parking.factory("parkingHttpFacade", function ($http) {
var _getCars = function () {
return $http.get("/cars");
};
var _getCar = function (id) {
return $http.get("/cars/" + id);
};
var _saveCar = function (car) {
return $http.post("/cars", car);
};
var _updateCar = function (car) {
return $http.put("/cars" + car.id, car);
};
var _deleteCar = function (id) {
return $http.delete("/cars/" + id);
};
return {
getCars: _getCars,
getCar: _getCar,
saveCar: _saveCar,
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