regarding foodme project in github - node.js

Question

hello i have a question regarding the foodme express example over github:
code:
var express = require('express');
var fs = require('fs');
var open = require('open');
var RestaurantRecord = require('./model').Restaurant;
var MemoryStorage = require('./storage').Memory;
var API_URL = '/api/restaurant';
var API_URL_ID = API_URL + '/:id';
var API_URL_ORDER = '/api/order';
var removeMenuItems = function(restaurant) {
var clone = {};
Object.getOwnPropertyNames(restaurant).forEach(function(key) {
if (key !== 'menuItems') {
clone[key] = restaurant[key];
}
});
return clone;
};
exports.start = function(PORT, STATIC_DIR, DATA_FILE, TEST_DIR) {
var app = express();
var storage = new MemoryStorage();
// log requests
app.use(express.logger('dev'));
// serve static files for demo client
app.use(express.static(STATIC_DIR));
// parse body into req.body
app.use(express.bodyParser());
// API
app.get(API_URL, function(req, res, next) {
res.send(200, storage.getAll().map(removeMenuItems));
});
i don't understand where is the api folder. it doesn't exist and i don't understand how information is going in and out from there. i can't find it.
can someone please explain this to me?
another question:
there is a resource for the restaurant
foodMeApp.factory('Restaurant', function($resource) {
return $resource('/api/restaurant/:id', {id: '#id'});
});
and in the restaurant controller there is a query:
var allRestaurants = Restaurant.query(filterAndSortRestaurants);
and the following lines:
$scope.$watch('filter', filterAndSortRestaurants, true);
function filterAndSortRestaurants() {
$scope.restaurants = [];
// filter
angular.forEach(allRestaurants, function(item, key) {
if (filter.price && filter.price !== item.price) {
return;
}
if (filter.rating && filter.rating !== item.rating) {
return;
}
if (filter.cuisine.length && filter.cuisine.indexOf(item.cuisine) === -1) {
return;
}
$scope.restaurants.push(item);
});
// sort
$scope.restaurants.sort(function(a, b) {
if (a[filter.sortBy] > b[filter.sortBy]) {
return filter.sortAsc ? 1 : -1;
}
if (a[filter.sortBy] < b[filter.sortBy]) {
return filter.sortAsc ? -1 : 1;
}
return 0;
});
};
the things that isn't clear to me is:
how is that we are giving the query just a function without even activating it.
as i understand we should have passed the query somthing like:
{id: $routeParams.restaurantId}
but we only passed a reference to a function. that doesn't make any sense.
could someone elaborate on this?
thanks again.

Answer 1

var API_URL = '/api/restaurant';
var API_URL_ID = API_URL + '/:id';
var API_URL_ORDER = '/api/order';
These lines are just defining string constants that are plugged into Express further down. They're not a folder.
app.get(API_URL, function(req, res, next) {
res.send(200, storage.getAll().map(removeMenuItems));
});
So this function call to app.get(API_URL... is telling Express "Look out for GET requests that are pointed at the URL (your app's domain)/api/restaurant, and execute this function to handle such a request."

Answer 2

"api" is not a folder.
Every requests will pass through the app.get method.
This method will respond to the routes /api/restaurant as defined in the API_URL variable.