adding exercise 3

exercises/exercise3/Exercise3Description.md

+# Exercise 3: In Memory API
+
+## Due Date: Tuesday January 19th 2021, 11:59 PM
+## Objectives: To become familiar with creating custom endpoints for a REST API, how data is stored and modeled in a REST API,further practice with Javascript Array Methods, and how to properly structure an express API.
+
+## Specifications/Requirements
+We have provided you with a complete Express API application. You need to complete the code inside of 2 files: the `Contact.js` class inside of the `models` directory and `contacts.js` inside of `routes/api/v1`. We have provided comments at the top of both files with the requirements.
+
+__Note: In order to run the application run ```npm install``` and then ```npm start``` in the top level directory of the exercise. To test your endpoints you will need the use of an external tool like Postman or the use of the Curl command line utility.__ 
\ No newline at end of file

exercises/exercise3/InMemoryApi/.gitignore

+node_modules
+.DS_Store
\ No newline at end of file

exercises/exercise3/InMemoryApi/app.js

+const express = require('express');
+const path = require('path');
+const cookieParser = require('cookie-parser');
+const logger = require('morgan');
+
+const contactsRouter = require('./routes/api/v1/contacts');
+
+var app = express();
+
+app.use(logger('dev'));
+app.use(express.json());
+app.use(express.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, 'public')));
+
+
+app.use('/api/v1/contacts', contactsRouter);
+
+module.exports = app;

exercises/exercise3/InMemoryApi/bin/www

+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('inmemoryapi:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

exercises/exercise3/InMemoryApi/models/contact.js

+/* In this file you will define the Contact class and export it.
+The contact class has the following properites:
+firstName,
+lastName,
+phoneNumber,
+email,
+id
+*/
\ No newline at end of file

exercises/exercise3/InMemoryApi/package-lock.json

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+      "requires": {
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "parseurl": "~1.3.2",
+        "send": "0.16.2"
+      }
+    },
+    "setprototypeof": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.0.tgz",
+      "integrity": "sha512-BvE/TwpZX4FXExxOxZyRGQQv651MSwmWKZGqvmPcRIjDqWub67kTKuIMx43cZZrS/cBBzwBcNDWoFxt2XEFIpQ=="
+    },
+    "statuses": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.4.0.tgz",
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+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "requires": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
+      }
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+    "unpipe": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
+    },
+    "utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
+    },
+    "vary": {
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+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
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+}

exercises/exercise3/InMemoryApi/package.json

+{
+  "name": "inmemoryapi",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www"
+  },
+  "dependencies": {
+    "cookie-parser": "~1.4.4",
+    "debug": "~2.6.9",
+    "express": "~4.16.1",
+    "morgan": "~1.9.1"
+  }
+}

exercises/exercise3/InMemoryApi/public/index.html

+<html>
+
+<head>
+  <title>Express</title>
+  <link rel="stylesheet" href="/stylesheets/style.css">
+</head>
+
+<body>
+  <h1>Express</h1>
+  <p>Welcome to Express</p>
+</body>
+
+</html>

exercises/exercise3/InMemoryApi/public/stylesheets/style.css

+body {
+  padding: 50px;
+  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
+}
+
+a {
+  color: #00B7FF;
+}

exercises/exercise3/InMemoryApi/routes/api/v1/contacts.js

+/* In this file you will define all the routes for your api.
+You will need to define the following routes:
+1) /api/v1/contacts
+  This route will need to respond to 2 requests:
+  1) GET: it will respond with the serialized form of all the
+  contacts in your application and a response code of 200
+  2) POST: it will respond to a POST request that will generate a 
+  new instance of a contact and add it to the in memory collection
+  and a response code 201
+2) /api/v1/contacts/:id
+  This route will need to responde to 3 requests:
+  1) GET: it will respond with the serialized form of the requested
+  resource and a response code of 200. You will receive the :id from 
+  the req.params.id property
+  2) PUT: it will update the resource with the information attached in
+  the req.query property. Note: query params end at the end of the route,
+  and all come after the ? character and are combined with a &.
+  For example, if you wanted to update the firstName and lastName properties
+  of the contact with an id of 3, the url would be (assuming your server is runing
+  on port 3000):
+  localhost:3000/api/v1/contacts/3?firstName=NewFirstName&lastName=NewLastName   
+  Your route should respond with a 201 response code along with the updated
+  resource otherwise 404 with an error message of "unable to update resource".
+  3) DELETE: it will remove the contact from the collection with the matching id 
+  in the request.params object and respond with a status code of 201 alone with 
+  the deleted resource in the response. If the resource is not found the route should
+  respond with a 404 error and message "resource not found".  
+
+  Hint: when sending your response you should follow the following examples:
+  res.status(404).json({error: 'Contact not found'})  
+  res.status(200).json(contacts)
+  res.status(201).json(data)  
+  */
+
+let express = require('express');
+let contactsRouter = express.Router();
+
+let contacts = [];
+
+/* Define your routes/endpoints here */
+
+module.exports = contactsRouter;
\ No newline at end of file