added full crud api with controller example

Author: taytestokes

.gitignore

@@ -0,0 +1 @@
+node_modules

README.md

@@ -2,6 +2,8 @@
 
 In this lecture we talk about Top Level Middleware, Using Postman, and using Axios in our API.
 
+Examples can be found inside the `.js` files of this repo.
+
 ## Top Level Middleware
 
 `Top Level Middleware` is the term we use to refer to some logic that will be executed upon every request that is made to our API.
@@ -54,4 +56,33 @@ Now your API is setup to follow the `CORS` protocol.
 
 ## Postman
 
-`Postman` is a suite that we can use to act as a `client` to interact with the `API` that we build.
+`Postman` is a suite that we can use to act as a `client` to interact with the `API` that we build.
+
+The browser, by default, will only let us make `get` requests from the URL. So we can use `postman` to test out a `full CRUD API`.
+
+## Full CRUD API
+
+So far we have built an API that has only allowed `get` requests to be made. We need to also allow `post`, `put`, and `delete` requests to be made to become a `full CRUD API`.
+
+POST:
+```js
+app.post('path for the endpoint', handlerFunc)
+```
+
+PUT:
+```js
+app.put('path for the endpoint', handlerFunc)
+```
+
+DELETE:
+```js
+app.delete('path for the endpoint', handlerFunc)
+```
+
+We now have a "fully funcitonal" API because are following the full CRUD pattern.
+
+## Controller
+
+A `controller` is what we can use to store all of our functions that we use to handle the requests being made.
+
+We usually will create a seperate javascript file that will hold the controller functions.

controller.js

@@ -0,0 +1,111 @@
+// Sample Data
+const users = [
+    {
+      "id": 1,
+      "first_name": "Raul",
+      "last_name": "Wynter",
+      "email": "rwynter0@google.com"
+    },
+    {
+      "id": 2,
+      "first_name": "Demetri",
+      "last_name": "Dakin",
+      "email": "ddakin1@google.com"
+    },
+    {
+      "id": 3,
+      "first_name": "Lira",
+      "last_name": "Collishaw",
+      "email": "lcollishaw2@google.com"
+    },
+    {
+      "id": 4,
+      "first_name": "Jennette",
+      "last_name": "O'Brollachain",
+      "email": "jobrollachain3@msn.com"
+    },
+    {
+      "id": 5,
+      "first_name": "Annaliese",
+      "last_name": "Marishenko",
+      "email": "amarishenko4@msn.com"
+    },
+    {
+      "id": 6,
+      "first_name": "Delano",
+      "last_name": "Millins",
+      "email": "dmillins5@yahoo.com"
+    },
+    {
+      "id": 7,
+      "first_name": "Allister",
+      "last_name": "Rizzetti",
+      "email": "arizzetti6@yahoo.com"
+    },
+    {
+      "id": 8,
+      "first_name": "Yul",
+      "last_name": "Slite",
+      "email": "yslite7@yahoo.com"
+    },
+    {
+      "id": 9,
+      "first_name": "Stu",
+      "last_name": "Liveing",
+      "email": "sliveing8@devmountain.com"
+    },
+    {
+      "id": 10,
+      "first_name": "Carla",
+      "last_name": "Gisbye",
+      "email": "cgisbye9@devmountain.com"
+    }
+  ];
+
+
+// Get Controller
+const sendUsers = (req, res) => {
+    res.status(200).send(users);
+};
+
+// Post Controller
+const addUser = (req, res) => {
+    // get user obj from body
+    const {user} = req.body;
+    // add user to the array
+    users = users.push(user);
+    // send new users array
+    res.status(200).send(user);
+}
+
+// Put Controller
+const updateUser = (req, res) => {
+    // take id from params
+    const {id} = req.params;
+    // find the user and update it
+    for(let i = 0; i < users.length; i++){
+        if(users[i].id === +id){
+            users[i].first_name = 'New Name'
+        }
+    };
+    // send users back
+    res.status(200).send(users);
+};
+
+// Delete Controller
+const deleteUser = (req, res) => {
+    // take id from query
+    const {id} = req.query;
+    // find user and delete it
+    const updatedUsers = users.filter(user => user.id !== +id);
+    // return updated users
+    return updatedUsers;
+}
+
+// Export The Controller Functions
+module.exports = {
+    sendUsers,
+    addUser,
+    updateUser,
+    deleteUser
+};

index.js

@@ -0,0 +1,22 @@
+const express = require('express');
+const cors = require('cors');
+// require the controllers
+const ctrl = require('./controller');
+
+// Setup App
+const app = express();
+
+// Top Level Middleware
+app.use(express.json());
+app.use(cors());
+
+// End Points
+app.get('/api/users', ctrl.sendUsers);
+app.post('/api/users/add', ctrl.addUser);
+app.put('/api/users/update/:id', ctrl.updateUser);
+app.delete('/api/user');
+
+// Server Listening
+app.listen(3005, () => {
+    console.log('Server running!')
+});