Added controller for Product CRUD operations

controllers/products.js

@@ -0,0 +1,91 @@
+/**
+ * A very simple product editor
+ */
+'use strict';
+var Product = require('../models/productModel');
+
+module.exports = function (server) {
+
+    /**
+     * Retrieve a list of all products for editing.
+     */
+    server.get('/products', function (req, res) {
+
+        Product.find(function (err, prods) {
+            if (err) {
+                console.log(err);
+            }
+
+            var model =
+            {
+                products: prods
+            };
+            res.render('products', model);
+        });
+
+    });
+
+
+    /**
+     * Add a new product to the database.
+     * **** PLEASE READ THE COMMENT BELOW! ****
+     */
+    server.post('/products', function (req, res) {
+        var name = req.body.name && req.body.name.trim();
+
+        //***** PLEASE READ THIS COMMENT ******\\\
+        /*
+         Using floating point numbers to represent currency is a *BAD* idea \\
+
+         You should be using arbitrary precision libraries like:
+         https://github.com/justmoon/node-bignum instead.
+
+         So why am I not using it here? At the time of this writing, bignum is tricky to install
+         on Windows-based systems. I opted to make this example accessible to more people, instead
+         of making it mathematically correct.
+
+         I would strongly advise against using this code in production.
+         You've been warned!
+         */
+        var price = parseFloat(req.body.price, 10);
+
+        //Some very lightweight input checking
+        if (name === '' || isNaN(price)) {
+            res.redirect('/products#BadInput');
+            return;
+        }
+
+        var newProduct = new Product({name: name, price: price});
+
+        //Show it in console for educational purposes...
+        newProduct.whatAmI();
+
+        newProduct.save();
+
+        res.redirect('/products');
+    });
+
+    /**
+     * Delete a product.
+     * @paaram: req.body.item_id Is the unique id of the product to remove.
+     */
+    server.delete('/products', function (req, res) {
+        Product.remove({_id: req.body.item_id}, function (err) {
+            if (err) {
+                console.log('Remove error: ', err);
+            }
+            res.redirect('/products');
+        });
+    });
+
+
+    /**
+     * Edit a product.
+     * Not implemented here
+     */
+    server.put('/products', function (req, res) {
+        console.log('PUT received. Ignoring.');
+        res.redirect('/products');
+    });
+
+};