├── README.md
├── .gitignore
├── .gitattributes
├── public
    ├── imgs
    │   ├── back.png
    │   └── back2.png
    ├── js
    │   ├── index.js
    │   ├── libs
    │   │   ├── deparam.js
    │   │   ├── mustache.js
    │   │   └── jquery-3.3.1.min.js
    │   └── chat.js
    ├── index.html
    ├── chat.html
    └── css
    │   └── styles.css
├── server
    ├── utils
    │   ├── validation.js
    │   ├── rooms.js
    │   ├── validation.test.js
    │   ├── giphy.js
    │   ├── message.js
    │   ├── message.test.js
    │   ├── users.js
    │   └── users.test.js
    └── server.js
├── playground
    └── time.js
└── package.json


/README.md:
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1 | # node-course-2-chat-app
2 | 


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/.gitignore:
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1 | node_modules/
2 | playground/
3 | 


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/.gitattributes:
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1 | # Auto detect text files and perform LF normalization
2 | * text=auto
3 | 


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/public/imgs/back.png:
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https://raw.githubusercontent.com/Ashleshk/node-course-2-chat-app/master/public/imgs/back.png


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/public/imgs/back2.png:
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https://raw.githubusercontent.com/Ashleshk/node-course-2-chat-app/master/public/imgs/back2.png


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/server/utils/validation.js:
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1 | var isRealString = (str) => {
2 |   return typeof str === 'string' && str.trim().length > 0;
3 | };
4 | 
5 | module.exports = {isRealString};
6 | 


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/server/utils/rooms.js:
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 1 | class Rooms {
 2 | 	constructor() {
 3 | 		this.rooms = [];
 4 | 	}
 5 | 
 6 | 	addRoom(name) {
 7 | 		this.rooms.push(name);
 8 | 	}
 9 | 
10 | 	removeRoom(name) {
11 | 		this.rooms = this.rooms.filter((room) => room != name);
12 | 	}
13 | 
14 | 	getRooms() {
15 | 		return this.rooms;
16 | 	}
17 | }
18 | 
19 | module.exports = {Rooms};
20 | 


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/public/js/index.js:
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 1 | let socket = io();
 2 | 
 3 | socket.on('connect', () => {
 4 | 	console.log('Index connected');
 5 | 
 6 | 	socket.on('loadRooms', function(rooms) {
 7 | 		
 8 | 		rooms.forEach(function(room) {
 9 | 			$('#room-select').append($('<option></option>').text(room.toUpperCase()).attr('value', `${room}`));
10 | 		});
11 | 	});
12 | });
13 | 
14 | 
15 | 			
16 | 


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/playground/time.js:
--------------------------------------------------------------------------------
 1 | var moment = require('moment');
 2 | 
 3 | // Jan 1st 1970 00:00:10 am
 4 | 
 5 | // var date = new Date();
 6 | // var months = ['Jan', 'Feb']
 7 | // console.log(date.getMonth());
 8 | 
 9 | var date = moment();
10 | date.add(100, 'year').subtract(9, 'months');
11 | console.log(date.format('MMM Do, YYYY'));
12 | 
13 | // 10:35 am
14 | // 6:01 am
15 | 
16 | var someTimestamp = moment().valueOf();
17 | console.log(someTimestamp)
18 | 
19 | var createdAt = 1234;
20 | var date = moment(createdAt);
21 | console.log(date.format('h:mm a'))
22 | 


--------------------------------------------------------------------------------
/server/utils/validation.test.js:
--------------------------------------------------------------------------------
 1 | const expect = require('expect');
 2 | 
 3 | const {isRealString} = require('./validation');
 4 | 
 5 | describe('isRealString', () => {
 6 |   it('should reject non-string values', () => {
 7 |     var res = isRealString(98);
 8 |     expect(res).toBe(false);
 9 |   });
10 | 
11 |   it('should reject string with only spaces', () => {
12 |     var res = isRealString('    ');
13 |     expect(res).toBe(false);
14 |   });
15 | 
16 |   it('should allow string with non-space characters', () => {
17 |     var res = isRealString('D');
18 |     expect(res).toBe(true);
19 |   });
20 | });
21 | 


--------------------------------------------------------------------------------
/server/utils/giphy.js:
--------------------------------------------------------------------------------
 1 | const axios = require('axios');
 2 | 
 3 | 
 4 | let getGif = (searchString) => {
 5 | 	
 6 | 	let giphyUrl = `https://api.giphy.com/v1/gifs/translate?api_key=WFYShEMluFwHlUXBJ7Kk7jhGbspo1CC7&s=${searchString}`;
 7 | 
 8 | 	return axios.get(giphyUrl)
 9 | 		.then((response) => {
10 | 			let gifUrl = response.data.data.images.original.url;
11 | 			console.log('Success: ', response.data.data.images.fixed_width.url);
12 | 			return gifUrl;
13 | 		})
14 | 		.catch((errObj) => {
15 | 			console.log('Error: ', errObj.message);
16 | 		});
17 | };
18 | 
19 | module.exports = {getGif};
20 | 
21 | 
22 | 
23 | 


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/server/utils/message.js:
--------------------------------------------------------------------------------
 1 | var moment = require('moment');
 2 | 
 3 | var generateMessage = (from, text) => {
 4 |   return {
 5 |     from,
 6 |     text,
 7 |     createdAt: moment().valueOf()
 8 |   };
 9 | };
10 | 
11 | let generateGif = (from, url) => {
12 | 	return {
13 | 		from,
14 | 		url,
15 | 		createdAt: moment().valueOf()
16 | 	}
17 | };
18 | 
19 | // var generateLocationMessage = (from, latitude, longitude) => {
20 | //   return {
21 | //     from,
22 | //     url: `https://www.google.com/maps?q=${latitude},${longitude}`,
23 | //     createdAt: moment().valueOf()
24 | //   };
25 | // };
26 | 
27 | 
28 | module.exports = {generateMessage, generateGif};
29 | 


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/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "chat-app",
 3 |   "version": "1.0.0",
 4 |   "description": "",
 5 |   "main": "index.js",
 6 |   "scripts": {
 7 |     "start": "node server/server.js",
 8 |     "test": "mocha server/**/*.test.js",
 9 |     "test-watch": "nodemon --exec 'npm test'"
10 |   },
11 |   "engines": {
12 |     "node": "6.2.2"
13 |   },
14 |   "author": "",
15 |   "license": "ISC",
16 |   "dependencies": {
17 |     "axios": "^0.18.0",
18 |     "express": "^4.16.4",
19 |     "moment": "^2.22.2",
20 |     "socket.io": "^1.4.8"
21 |   },
22 |   "devDependencies": {
23 |     "expect": "^1.20.2",
24 |     "mocha": "^3.0.2",
25 |     "nodemon": "^1.18.6"
26 |   }
27 | }
28 | 


--------------------------------------------------------------------------------
/public/js/libs/deparam.js:
--------------------------------------------------------------------------------
 1 | /**
 2 |  * jQuery.deparam - The oposite of jQuery param. Creates an object of query string parameters.
 3 |  *
 4 |  * Credits for the idea and Regex:
 5 |  * http://stevenbenner.com/2010/03/javascript-regex-trick-parse-a-query-string-into-an-object/
 6 | */
 7 | (function($){
 8 |   $.deparam = $.deparam || function(uri){
 9 |     if(uri === undefined){
10 |       uri = window.location.search;
11 |     }
12 |     var queryString = {};
13 |     uri.replace(
14 |       new RegExp(
15 |         "([^?=&]+)(=([^&#]*))?", "g"),
16 |         function($0, $1, $2, $3) {
17 |         	queryString[$1] = decodeURIComponent($3.replace(/\+/g, '%20'));
18 |         }
19 |       );
20 |       return queryString;
21 |     };
22 | })(jQuery);
23 | 


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/server/utils/message.test.js:
--------------------------------------------------------------------------------
 1 | var expect = require('expect');
 2 | 
 3 | var {generateMessage, generateLocationMessage} = require('./message');
 4 | 
 5 | describe('generateMessage', () => {
 6 |   it('should generate correct message object', () => {
 7 |     var from = 'Jen';
 8 |     var text = 'Some message';
 9 |     var message = generateMessage(from, text);
10 | 
11 |     expect(message.createdAt).toBeA('number');
12 |     expect(message).toInclude({from, text});
13 |   });
14 | });
15 | 
16 | describe('generateGif', () => {
17 | 	it('should generate the correct message object', () => {
18 | 		let from = 'Test';
19 | 		let url = 'https://someUrl.com';
20 | 		let message = generateGif(from, url);
21 | 
22 | 		expect(message).toInclude({from, url});
23 | 		expect(message.createdAt).toBeA('number');
24 | 	})
25 | });
26 | 
27 | // describe('generateLocationMessage', () => {
28 | //   it('should generate correct location object', () => {
29 | //     var from = 'Deb';
30 | //     var latitude = 15;
31 | //     var longitude = 19;
32 | //     var url = 'https://www.google.com/maps?q=15,19';
33 | //     var message = generateLocationMessage(from, latitude, longitude);
34 | 
35 | //     expect(message.createdAt).toBeA('number');
36 | //     expect(message).toInclude({from, url});
37 | //   });
38 | // });
39 | 


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/public/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html>
 3 | <head>
 4 | 	<meta charset="utf-8">
 5 | 	<meta http-equiv="X-UA-Compatible" content="IE=edge">
 6 | 	<title>Chatty | Join</title>
 7 | 	<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
 8 | 	<link rel="stylesheet" href="./css/styles.css">
 9 | </head>
10 | <body class="centered-form">
11 | 	<div class="centered-form__form">
12 | 		<form action="/chat.html">
13 | 			<div class="form-field">
14 | 				<h3>Let's Chat</h3>
15 | 			</div>
16 | 			<div class="form-field">
17 | 				<label>User Name</label>
18 | 				<input type="text" name="name" autofocus/>
19 | 			</div>
20 | 			<div class="form-field">
21 | 				<label>Select a Room</label>
22 | 				<select id="room-select" name="room_select">
23 | 					<option></option>
24 | 					<option value="free for all">FREE FOR ALL</option>
25 | 				</select>
26 | 			</div>
27 | 			<div>
28 | 				<h4>-- Or --</h4>
29 | 			</div>
30 | 			<div class="form-field">
31 | 				<label>Create a Room</label>
32 | 				<input type="text" name="room_input"/>
33 | 			</div>
34 | 			<div class="form-field">
35 | 				<button>Join</button>
36 | 			</div>
37 | 		</form>
38 | 	</div>
39 | 	<script src="/socket.io/socket.io.js"></script>
40 | 	<script src="/js/libs/jquery-3.3.1.min.js"></script>
41 | 	<script src="/js/index.js"></script>
42 | </body>
43 | </html>
44 | 


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/server/utils/users.js:
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 1 | [{
 2 |   id: '/#12poiajdspfoif',
 3 |   name: 'Andrew',
 4 |   room: 'The Office Fans'
 5 | }]
 6 | 
 7 | // addUser(id, name, room)
 8 | // removeUser(id)
 9 | // getUser(id)
10 | // getUserList(room)
11 | 
12 | class Users {
13 |   constructor () {
14 |     this.users = [];
15 |   }
16 |   addUser (id, name, room) {
17 |     var user = {id, name, room};
18 |     this.users.push(user);
19 |     return user;
20 |   }
21 |   removeUser (id) {
22 |     var user = this.getUser(id);
23 | 
24 |     if (user) {
25 |       this.users = this.users.filter((user) => user.id !== id);
26 |     }
27 | 
28 |     return user;
29 |   }
30 |   getUser (id) {
31 |     return this.users.filter((user) => user.id === id)[0]
32 |   }
33 |   getUserList (room) {
34 |     var users = this.users.filter((user) => user.room === room);
35 |     var namesArray = users.map((user) => user.name);
36 | 
37 |     return namesArray;
38 |   }
39 | }
40 | 
41 | module.exports = {Users};
42 | 
43 |  // class Person {
44 |  //   constructor (name, age) {
45 |  //     this.name = name;
46 |  //     this.age = age;
47 |  //   }
48 |  //   getUserDescription () {
49 |  //     return `${this.name} is ${this.age} year(s) old.`;
50 |  //   }
51 |  // }
52 |  //
53 |  // var me = new Person('Andrew', 25);
54 |  // var description = me.getUserDescription();
55 |  // console.log(description);
56 | 


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/public/chat.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | 
 3 | <html>
 4 | 
 5 | <head>
 6 |   <meta charset="utf-8">
 7 |   <meta http-equiv="X-UA-Compatible" content="IE=edge">
 8 |   <title>Chat | ChatApp</title>
 9 |   <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
10 |   <link rel="stylesheet" href="/css/styles.css">
11 | </head>
12 | 
13 | <body class="chat">
14 | 	<div class="chat__sidebar">
15 | 		<div class="sidebar__icon">
16 | 			<a href="/"><img src="./imgs/back2.png" height="50" width="50" id="back-arrow"></a>
17 | 		</div>
18 | 		<h3>Online:</h3>
19 | 		<div id="users"></div>
20 | 	</div>
21 | 	<div class="chat__main">
22 | 		<ol id="messages" class="chat__messages"></ol>
23 | 		<div class="chat__footer">
24 | 			<form id="message-form">
25 | 				<input name="message" type="text" placeholder="Message" autofocus autocomplete="off"/>
26 | 				<button id="send-message">Send</button>
27 | 			</form>
28 | 			<button id="search-giphy">Giphy Search</button>
29 | 		</div>
30 | 	</div>
31 | 
32 | 	<script id="message-template" type="text/template">
33 | 		<li class="message">
34 | 			<div class="message__title">
35 | 				<h4>{{from}}:</h4>
36 | 				<span>{{createdAt}}</span>
37 | 			</div>
38 | 			<div class="message__body">
39 | 				<p>{{text}}</p>
40 | 			</div>
41 | 		</li>
42 | 	</script>
43 | 
44 | 	<script id="gif-message-template" type="text/template">
45 | 		<li class="message">
46 | 			<div class="message__title">
47 | 				<h4>{{from}}:</h4>
48 | 				<span>{{createdAt}}</span>
49 | 			</div>
50 | 			<div class="message__body">
51 | 				<img src="{{url}}" class="gif_message">
52 | 			</div>
53 | 		</li>
54 | 	</script>
55 | 
56 | 	<script src="/socket.io/socket.io.js"></script>
57 | 	<script src="/js/libs/jquery-3.3.1.min.js"></script>
58 | 	<script src="/js/libs/moment.js"></script>
59 | 	<script src="/js/libs/mustache.js"></script>
60 | 	<script src="/js/libs/deparam.js"></script>
61 | 	<script src="/js/chat.js"></script>
62 | </body>
63 | 
64 | </html>
65 | 


--------------------------------------------------------------------------------
/server/utils/users.test.js:
--------------------------------------------------------------------------------
 1 | const expect = require('expect');
 2 | 
 3 | const {Users} = require('./users');
 4 | 
 5 | describe('Users', () => {
 6 |   var users;
 7 | 
 8 |   beforeEach(() => {
 9 |     users = new Users();
10 |     users.users = [{
11 |       id: '1',
12 |       name: 'Mike',
13 |       room: 'Node Course'
14 |     }, {
15 |       id: '2',
16 |       name: 'Jen',
17 |       room: 'React Course'
18 |     }, {
19 |       id: '3',
20 |       name: 'Julie',
21 |       room: 'Node Course'
22 |     }];
23 |   });
24 | 
25 |   it('should add new user', () => {
26 |     var users = new Users();
27 |     var user = {
28 |       id: '123',
29 |       name: 'Andrew',
30 |       room: 'The Office Fans'
31 |     };
32 |     var resUser = users.addUser(user.id, user.name, user.room);
33 | 
34 |     expect(users.users).toEqual([user]);
35 |   });
36 | 
37 |   it('should remove a user', () => {
38 |     var userId = '1';
39 |     var user = users.removeUser(userId);
40 | 
41 |     expect(user.id).toBe(userId);
42 |     expect(users.users.length).toBe(2);
43 |   });
44 | 
45 |   it('should not remove user', () => {
46 |     var userId = '99';
47 |     var user = users.removeUser(userId);
48 | 
49 |     expect(user).toNotExist();
50 |     expect(users.users.length).toBe(3);
51 |   });
52 | 
53 |   it('should find user', () => {
54 |     var userId = '2';
55 |     var user = users.getUser(userId);
56 | 
57 |     expect(user.id).toBe(userId);
58 |   });
59 | 
60 |   it('should not find user', () => {
61 |     var userId = '99';
62 |     var user = users.getUser(userId);
63 | 
64 |     expect(user).toNotExist();
65 |   });
66 | 
67 |   it('should return names for node course', () => {
68 |     var userList = users.getUserList('Node Course');
69 | 
70 |     expect(userList).toEqual(['Mike', 'Julie']);
71 |   });
72 | 
73 |   it('should return names for react course', () => {
74 |     var userList = users.getUserList('React Course');
75 | 
76 |     expect(userList).toEqual(['Jen']);
77 |   });
78 | });
79 | 


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/public/js/chat.js:
--------------------------------------------------------------------------------
  1 | let socket = io();
  2 | 
  3 | function scrollToBottom() {
  4 | 	//Selectors
  5 | 	let messages = $('#messages');
  6 | 	let newMessage = messages.children('li:last-child');
  7 | 
  8 | 	//Heights
  9 | 	//prop is a crossbrowser way of performing document selection
 10 | 	let clientHeight = messages.prop('clientHeight');
 11 | 	let scrollTop = messages.prop('scrollTop');
 12 | 	let scrollHeight = messages.prop('scrollHeight');
 13 | 	let newMessageHeight = newMessage.innerHeight();
 14 | 	let lastMessageHeight = newMessage.prev().innerHeight();
 15 | 
 16 | 	if(clientHeight + scrollTop + newMessageHeight + lastMessageHeight>= scrollHeight) {
 17 | 		//scrollTop is a jQuery method for setting scrollTop value
 18 | 		messages.scrollTop(scrollHeight);
 19 | 	}
 20 | };
 21 | 
 22 | //using pre-es6 function for cross browser compatibility
 23 | socket.on('connect', function() {
 24 | 	//returns an object of the query params
 25 | 	let params = $.deparam(window.location.search);
 26 | 	socket.emit('join', params, function(err) {
 27 | 		if(err) {
 28 | 			alert(err);
 29 | 			//redirects back to root page 
 30 | 			window.location.href = '/';
 31 | 		} else {
 32 | 			console.log('No error');
 33 | 		}
 34 | 	});
 35 | });
 36 | 
 37 | socket.on('disconnect', function() {
 38 | 	console.log('Disconnected from server');
 39 | });
 40 | 
 41 | socket.on('updateUserList', function(users) {
 42 | 	let ul = $('<ul></ul>');
 43 | 
 44 | 	users.forEach(function(user) {
 45 | 		ul.append($('<li></li>').text(user));
 46 | 
 47 | 		$('#users').html(ul);
 48 | 	});
 49 | });
 50 | 
 51 | //custom event, receives message object from emitted event in server.js
 52 | socket.on('newMessage', function(message) {
 53 | 	//html method returns the markup inside message-template
 54 | 	let formattedTime = moment(message.createdAt).format('h:mm a');
 55 | 	let template = $('#message-template').html();
 56 | 	let html = Mustache.render(template, {
 57 | 		text: message.text,
 58 | 		from: message.from,
 59 | 		createdAt: formattedTime
 60 | 	});
 61 | 
 62 | 	$('#messages').append(html);
 63 | 	scrollToBottom();
 64 | });
 65 | 
 66 | socket.on('newGifMessage', function(message) {
 67 | 
 68 | 	let formattedTime = moment(message.createdAt).format('h:mm a');
 69 | 	let template = $('#gif-message-template').html();
 70 | 	let html = Mustache.render(template, {
 71 | 		url: message.url,
 72 | 		from: message.from,
 73 | 		createdAt: formattedTime
 74 | 	});
 75 | 
 76 | 	$('#messages').append(html);
 77 | 	scrollToBottom();
 78 | });
 79 | 
 80 | $('#message-form').on('submit', function(e) {
 81 | 	//prevents page from refreshing on submit
 82 | 	e.preventDefault();
 83 | 
 84 | 	let messageTextbox = $('[name=message]')
 85 | 	
 86 | 	if(!e.originalEvent) {
 87 | 		socket.emit('createGifMessage', {
 88 | 			query: messageTextbox.val()
 89 | 		}, function() {
 90 | 			messageTextbox.val('');
 91 | 		});
 92 | 	} else {
 93 | 		socket.emit('createMessage', {
 94 | 			text: messageTextbox.val()
 95 | 		}, function() {
 96 | 			messageTextbox.val('');
 97 | 		});
 98 | 	}
 99 | });
100 | 
101 | $('#search-giphy').click(function() {
102 | 	$('#message-form').submit()
103 | });
104 | 
105 | 
106 | 
107 | // let locationButton = $('#send-location');
108 | // locationButton.on('click', function() {
109 | // 	//make sure browser has access to geolcation api
110 | // 	if(!navigator.geolocation) {
111 | // 		return alert('Geolocation not supported by your browser');
112 | // 	}
113 | 
114 | // 	locationButton.attr('disabled', 'disabled').text('Sending Location...');
115 | 
116 | // 	navigator.geolocation.getCurrentPosition(function(position) {
117 | // 		locationButton.removeAttr('disabled').text('Send Location');
118 | 
119 | // 		socket.emit('createLocationMessage', {
120 | // 			latitude: position.coords.latitude,
121 | // 			longitude: position.coords.longitude
122 | // 		});
123 | // 	}, function() {
124 | // 		alert('Unable to fetch location');
125 | // 		locationButton.removeAttr('disabled').text('Send Location');
126 | // 	});
127 | // });
128 | 
129 | 
130 | 
131 | 


--------------------------------------------------------------------------------
/server/server.js:
--------------------------------------------------------------------------------
  1 | const path = require('path');
  2 | const http = require('http');
  3 | const express = require('express');
  4 | const socketIO = require('socket.io');
  5 | 
  6 | const {generateMessage, generateLocation, generateGif} = require('./utils/message');
  7 | const {isRealString} = require('./utils/validation');
  8 | const {Users} = require('./utils/users');
  9 | const {Rooms} = require('./utils/rooms');
 10 | const {getGif} = require('./utils/giphy');
 11 | 
 12 | 
 13 | const publicPath = path.join(__dirname, '../public');
 14 | const port = process.env.PORT || 3000;
 15 | var app = express();
 16 | var server = http.createServer(app);
 17 | var io = socketIO(server);
 18 | var users = new Users();
 19 | let rooms = new Rooms();
 20 | 
 21 | 
 22 | app.use(express.static(publicPath));
 23 | 
 24 | io.on('connection', (socket) => {
 25 |   socket.emit('loadRooms', rooms.getRooms());
 26 | 
 27 |   socket.on('join', (params, callback) => {
 28 |     let roomSelect = params.room_select.toLowerCase();
 29 | 		let roomInput = params.room_input.toLowerCase();
 30 | 		let room = roomSelect || roomInput;
 31 | 		if (!isRealString(params.name) || !isRealString(room)) {
 32 | 			return callback('Name and room name are required');
 33 |     } 
 34 |     
 35 | 		if(isRealString(roomSelect) && isRealString(roomInput)) {
 36 | 			return callback('Either select a room or create one');
 37 |     }
 38 |     
 39 |     let roomCheck = () => {
 40 | 			//add room if it isn't already in the array
 41 | 			if(!rooms.getRooms().includes(room)) {
 42 | 				rooms.addRoom(room);
 43 | 			}
 44 | 			console.log('Rooms:', rooms.getRooms());
 45 |     }
 46 |     
 47 |     let joinRoom = () => {
 48 | 			//socket.join takes a string
 49 | 			socket.join(room);
 50 | 			//remove user from any previous rooms before adding to new one
 51 | 			users.removeUser(socket.id);
 52 | 			users.addUser(socket.id, params.name, room);
 53 | 
 54 | 			roomCheck();
 55 | 
 56 | 			//only emits to specific room
 57 | 			io.to(room).emit('updateUserList', users.getUserList(room));
 58 | 			socket.emit('newMessage', generateMessage('Admin', `WELCOME TO THE ${room.toUpperCase()} ROOM`));
 59 | 			socket.broadcast.to(room).emit('newMessage', generateMessage('Admin', `User ${params.name} has joined.`));
 60 | 		};
 61 | 
 62 | 		//check to see if user name already exists in room
 63 | 		if(users.getUserList(room).includes(params.name)) {
 64 | 			//prevent duplicate rooms getting added to select at index.html
 65 | 			roomCheck();
 66 | 			return callback('Name already exists, please choose another');
 67 | 		} else {
 68 | 			joinRoom();
 69 | 		}
 70 | 
 71 | 		callback();
 72 | 	});
 73 | 
 74 |   socket.on('createMessage', (message, callback) => {
 75 |     var user = users.getUser(socket.id);
 76 | 
 77 |     if (user && isRealString(message.text)) {
 78 |       io.to(user.room).emit('newMessage', generateMessage(user.name, message.text));
 79 |     }
 80 | 
 81 |     callback();
 82 |   });
 83 | 
 84 |   socket.on('createGifMessage', (message, callback) => {
 85 | 		let user = users.getUser(socket.id);
 86 | 
 87 | 		if(user && isRealString(message.query)) {
 88 | 			getGif(message.query)
 89 | 			.then((response) => {
 90 | 				let url = response;
 91 | 				io.to(user.room).emit('newGifMessage', generateGif(user.name, url));
 92 | 			})
 93 | 			.catch((err) => {
 94 | 				console.log(err);
 95 | 			})
 96 | 		}
 97 | 		callback();
 98 | 	});
 99 |   // socket.on('createLocationMessage', (coords) => {
100 |   //   var user = users.getUser(socket.id);
101 | 
102 |   //   if (user) {
103 |   //     io.to(user.room).emit('newLocationMessage', generateLocationMessage(user.name, coords.latitude, coords.longitude));  
104 |   //   }
105 |   // });
106 | 
107 |   socket.on('disconnect', () => {
108 |     var user = users.removeUser(socket.id);
109 |     let roomKeys = Object.keys(socket.adapter.rooms);
110 | 
111 |     rooms.getRooms().map((room) => {
112 | 			if(!roomKeys.includes(room)) {
113 | 				rooms.removeRoom(room);
114 | 				console.log('After remove: ', rooms.getRooms());
115 | 			}
116 |     });
117 |     
118 |     if (user) {
119 |       io.to(user.room).emit('updateUserList', users.getUserList(user.room));
120 |       io.to(user.room).emit('newMessage', generateMessage('Admin', `${user.name} has left.`));
121 |     }
122 |   });
123 | });
124 | 
125 | server.listen(port, () => {
126 |   console.log(`Server is up on ${port}`);
127 | });
128 | 


--------------------------------------------------------------------------------
/public/css/styles.css:
--------------------------------------------------------------------------------
  1 | * {
  2 |     box-sizing: border-box;
  3 |     margin: 0;
  4 |     padding: 0;
  5 |     font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
  6 |     font-weight: 300;
  7 |     font-size: .95rem;
  8 |   }
  9 |   
 10 |   ul, li {
 11 |     list-style-position: inside;
 12 |   }
 13 |   
 14 |   h3 {
 15 |     font-weight: 600;
 16 |     text-align: center;
 17 |     font-size: 1.5rem;
 18 |   }
 19 |   
 20 |   button {
 21 |     border: none;
 22 |     background: #265f82;
 23 |     color: white;
 24 |     cursor: pointer;
 25 |     padding: 10px;
 26 |     transition: background .3s ease;
 27 |   }
 28 |   
 29 |   button:hover {
 30 |     border: none;
 31 |     background: #1F4C69;
 32 |     color: white;
 33 |     padding: 10px;
 34 |   }
 35 |   
 36 |   button:disabled {
 37 |     cursor: default;
 38 |     background: #698ea5;
 39 |   }
 40 |   
 41 |   .centered-form {
 42 |     display: flex;
 43 |     align-items: center;
 44 |     height: 100vh;
 45 |     width: 100vw;
 46 |     justify-content: center;
 47 |     background: -moz-linear-gradient(125deg, rgba(39,107,130,1) 0%, rgba(49,84,129,1) 100%); /* ff3.6+ */
 48 |     background: -webkit-gradient(linear, left top, right bottom, color-stop(0%, rgba(49,84,129,1)), color-stop(100%, rgba(39,107,130,1))); /* safari4+,chrome */
 49 |     background: -webkit-linear-gradient(125deg, rgba(39,107,130,1) 0%, rgba(49,84,129,1) 100%); /* safari5.1+,chrome10+ */
 50 |     background: -o-linear-gradient(125deg, rgba(39,107,130,1) 0%, rgba(49,84,129,1) 100%); /* opera 11.10+ */
 51 |     background: -ms-linear-gradient(125deg, rgba(39,107,130,1) 0%, rgba(49,84,129,1) 100%); /* ie10+ */
 52 |     background: linear-gradient(325deg, rgba(39,107,130,1) 0%, rgba(49,84,129,1) 100%); /* w3c */
 53 |   }
 54 |   
 55 |   .centered-form__form {
 56 |     background: rgba(250, 250, 250, 0.9);
 57 |     border: 1px solid #e1e1e1;
 58 |     border-radius: 5px;
 59 |     padding: 0px 20px;
 60 |     margin: 20px;
 61 |     width: 230px;
 62 |   }
 63 |   
 64 |   .form-field {
 65 |     margin: 20px 0;
 66 |   }
 67 |   
 68 |   .form-field > * {
 69 |     width: 100%;
 70 |   }
 71 |   
 72 |   .form-field label {
 73 |     display: block;
 74 |     margin-bottom: 7px;
 75 |   }
 76 |   
 77 |   .form-field input, .form-field select {
 78 |     border: 1px solid #e1e1e1;
 79 |     padding: 10px;
 80 |   }
 81 |   
 82 |   .chat {
 83 |     display: flex;
 84 |   }
 85 |   
 86 |   .chat__sidebar {
 87 |     overflow-y: scroll;
 88 |     width: 260px;
 89 |     height: 100vh;
 90 |     background: -moz-linear-gradient(125deg, rgba(39,107,130,1) 0%, rgba(49,84,129,1) 100%); /* ff3.6+ */
 91 |     background: -webkit-gradient(linear, left top, right bottom, color-stop(0%, rgba(49,84,129,1)), color-stop(100%, rgba(39,107,130,1))); /* safari4+,chrome */
 92 |     background: -webkit-linear-gradient(125deg, rgba(39,107,130,1) 0%, rgba(49,84,129,1) 100%); /* safari5.1+,chrome10+ */
 93 |     background: -o-linear-gradient(125deg, rgba(39,107,130,1) 0%, rgba(49,84,129,1) 100%); /* opera 11.10+ */
 94 |     background: -ms-linear-gradient(125deg, rgba(39,107,130,1) 0%, rgba(49,84,129,1) 100%); /* ie10+ */
 95 |     background: linear-gradient(325deg, rgba(39,107,130,1) 0%, rgba(49,84,129,1) 100%); /* w3c */
 96 |   }
 97 |   
 98 |   .chat__sidebar h3 {
 99 |     color: #e6eaee;
100 |     margin: 10px 20px;
101 |     text-align: left;
102 |   }
103 |   
104 |   .chat__sidebar ul {
105 |     list-style-type: none;
106 |   }
107 |   
108 |   .chat__sidebar li {
109 |     background: #e6eaee;
110 |     border: 1px solid #e1e1e1;
111 |     border-radius: 5px;
112 |     padding: 10px;
113 |     margin: 10px;
114 |   }
115 |   
116 |   .chat__main {
117 |     display: flex;
118 |     flex-direction: column;
119 |     height: 100vh;
120 |     width: 100%;
121 |   }
122 |   
123 |   .chat__messages {
124 |     flex-grow: 1;
125 |     overflow-y: scroll;
126 |     -webkit-overflow-scrolling: touch;
127 |   }
128 |   
129 |   .chat__footer {
130 |     background: #e6eaee;
131 |     display: flex;
132 |     padding: 10px;
133 |     /*height: 60px;*/
134 |     flex-shrink: 0;
135 |   }
136 |   
137 |   .chat__footer form {
138 |     flex-grow: 1;
139 |     display: flex;
140 |   }
141 |   
142 |   .chat__footer form * {
143 |     margin-right: 10px;
144 |   }
145 |   
146 |   .chat__footer input {
147 |     border: none;
148 |     padding: 10px;
149 |     flex-grow: 1;
150 |   }
151 |   
152 |   .chat__messages {
153 |     list-style-type: none;
154 |     padding: 10px;
155 |   }
156 |   
157 |   .message {
158 |     padding: 10px;
159 |   }
160 |   
161 |   .message__title {
162 |     display: flex;
163 |     margin-bottom: 5px;
164 |   }
165 |   
166 |   .message__title h4 {
167 |     font-weight: 600;
168 |     margin-right: 10px;
169 |   }
170 |   
171 |   .message__title span {
172 |     color: #999;
173 |   }
174 |   
175 |   .sidebar__icon {
176 |     display: flex;
177 |     justify-content: center;
178 |   }
179 |   
180 |   #back-arrow {
181 |     margin-top: 15px;
182 |   }
183 |   
184 |   @media (max-width: 600px) {
185 |     * {
186 |       font-size: 1rem;
187 |     }
188 |   
189 |     .chat__sidebar {
190 |       display: none;
191 |     }
192 |   
193 |     .chat__footer {
194 |       flex-direction: column;
195 |     }
196 |   
197 |     .chat__footer form {
198 |       margin-bottom: 10px;
199 |     }
200 |   
201 |     .chat__footer button {
202 |       margin-right: 0px;
203 |     }
204 |   
205 |     .gif_message {
206 |       max-width: 300px;
207 |     }
208 |   }
209 |   


--------------------------------------------------------------------------------
/public/js/libs/mustache.js:
--------------------------------------------------------------------------------
  1 | /*!
  2 |  * mustache.js - Logic-less {{mustache}} templates with JavaScript
  3 |  * http://github.com/janl/mustache.js
  4 |  */
  5 | 
  6 | /*global define: false Mustache: true*/
  7 | 
  8 | (function defineMustache (global, factory) {
  9 |   if (typeof exports === 'object' && exports && typeof exports.nodeName !== 'string') {
 10 |     factory(exports); // CommonJS
 11 |   } else if (typeof define === 'function' && define.amd) {
 12 |     define(['exports'], factory); // AMD
 13 |   } else {
 14 |     global.Mustache = {};
 15 |     factory(global.Mustache); // script, wsh, asp
 16 |   }
 17 | }(this, function mustacheFactory (mustache) {
 18 | 
 19 |   var objectToString = Object.prototype.toString;
 20 |   var isArray = Array.isArray || function isArrayPolyfill (object) {
 21 |     return objectToString.call(object) === '[object Array]';
 22 |   };
 23 | 
 24 |   function isFunction (object) {
 25 |     return typeof object === 'function';
 26 |   }
 27 | 
 28 |   /**
 29 |    * More correct typeof string handling array
 30 |    * which normally returns typeof 'object'
 31 |    */
 32 |   function typeStr (obj) {
 33 |     return isArray(obj) ? 'array' : typeof obj;
 34 |   }
 35 | 
 36 |   function escapeRegExp (string) {
 37 |     return string.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, '\\$&');
 38 |   }
 39 | 
 40 |   /**
 41 |    * Null safe way of checking whether or not an object,
 42 |    * including its prototype, has a given property
 43 |    */
 44 |   function hasProperty (obj, propName) {
 45 |     return obj != null && typeof obj === 'object' && (propName in obj);
 46 |   }
 47 | 
 48 |   // Workaround for https://issues.apache.org/jira/browse/COUCHDB-577
 49 |   // See https://github.com/janl/mustache.js/issues/189
 50 |   var regExpTest = RegExp.prototype.test;
 51 |   function testRegExp (re, string) {
 52 |     return regExpTest.call(re, string);
 53 |   }
 54 | 
 55 |   var nonSpaceRe = /\S/;
 56 |   function isWhitespace (string) {
 57 |     return !testRegExp(nonSpaceRe, string);
 58 |   }
 59 | 
 60 |   var entityMap = {
 61 |     '&': '&amp;',
 62 |     '<': '&lt;',
 63 |     '>': '&gt;',
 64 |     '"': '&quot;',
 65 |     "'": '&#39;',
 66 |     '/': '&#x2F;',
 67 |     '`': '&#x60;',
 68 |     '=': '&#x3D;'
 69 |   };
 70 | 
 71 |   function escapeHtml (string) {
 72 |     return String(string).replace(/[&<>"'`=\/]/g, function fromEntityMap (s) {
 73 |       return entityMap[s];
 74 |     });
 75 |   }
 76 | 
 77 |   var whiteRe = /\s*/;
 78 |   var spaceRe = /\s+/;
 79 |   var equalsRe = /\s*=/;
 80 |   var curlyRe = /\s*\}/;
 81 |   var tagRe = /#|\^|\/|>|\{|&|=|!/;
 82 | 
 83 |   /**
 84 |    * Breaks up the given `template` string into a tree of tokens. If the `tags`
 85 |    * argument is given here it must be an array with two string values: the
 86 |    * opening and closing tags used in the template (e.g. [ "<%", "%>" ]). Of
 87 |    * course, the default is to use mustaches (i.e. mustache.tags).
 88 |    *
 89 |    * A token is an array with at least 4 elements. The first element is the
 90 |    * mustache symbol that was used inside the tag, e.g. "#" or "&". If the tag
 91 |    * did not contain a symbol (i.e. {{myValue}}) this element is "name". For
 92 |    * all text that appears outside a symbol this element is "text".
 93 |    *
 94 |    * The second element of a token is its "value". For mustache tags this is
 95 |    * whatever else was inside the tag besides the opening symbol. For text tokens
 96 |    * this is the text itself.
 97 |    *
 98 |    * The third and fourth elements of the token are the start and end indices,
 99 |    * respectively, of the token in the original template.
100 |    *
101 |    * Tokens that are the root node of a subtree contain two more elements: 1) an
102 |    * array of tokens in the subtree and 2) the index in the original template at
103 |    * which the closing tag for that section begins.
104 |    */
105 |   function parseTemplate (template, tags) {
106 |     if (!template)
107 |       return [];
108 | 
109 |     var sections = [];     // Stack to hold section tokens
110 |     var tokens = [];       // Buffer to hold the tokens
111 |     var spaces = [];       // Indices of whitespace tokens on the current line
112 |     var hasTag = false;    // Is there a {{tag}} on the current line?
113 |     var nonSpace = false;  // Is there a non-space char on the current line?
114 | 
115 |     // Strips all whitespace tokens array for the current line
116 |     // if there was a {{#tag}} on it and otherwise only space.
117 |     function stripSpace () {
118 |       if (hasTag && !nonSpace) {
119 |         while (spaces.length)
120 |           delete tokens[spaces.pop()];
121 |       } else {
122 |         spaces = [];
123 |       }
124 | 
125 |       hasTag = false;
126 |       nonSpace = false;
127 |     }
128 | 
129 |     var openingTagRe, closingTagRe, closingCurlyRe;
130 |     function compileTags (tagsToCompile) {
131 |       if (typeof tagsToCompile === 'string')
132 |         tagsToCompile = tagsToCompile.split(spaceRe, 2);
133 | 
134 |       if (!isArray(tagsToCompile) || tagsToCompile.length !== 2)
135 |         throw new Error('Invalid tags: ' + tagsToCompile);
136 | 
137 |       openingTagRe = new RegExp(escapeRegExp(tagsToCompile[0]) + '\\s*');
138 |       closingTagRe = new RegExp('\\s*' + escapeRegExp(tagsToCompile[1]));
139 |       closingCurlyRe = new RegExp('\\s*' + escapeRegExp('}' + tagsToCompile[1]));
140 |     }
141 | 
142 |     compileTags(tags || mustache.tags);
143 | 
144 |     var scanner = new Scanner(template);
145 | 
146 |     var start, type, value, chr, token, openSection;
147 |     while (!scanner.eos()) {
148 |       start = scanner.pos;
149 | 
150 |       // Match any text between tags.
151 |       value = scanner.scanUntil(openingTagRe);
152 | 
153 |       if (value) {
154 |         for (var i = 0, valueLength = value.length; i < valueLength; ++i) {
155 |           chr = value.charAt(i);
156 | 
157 |           if (isWhitespace(chr)) {
158 |             spaces.push(tokens.length);
159 |           } else {
160 |             nonSpace = true;
161 |           }
162 | 
163 |           tokens.push([ 'text', chr, start, start + 1 ]);
164 |           start += 1;
165 | 
166 |           // Check for whitespace on the current line.
167 |           if (chr === '\n')
168 |             stripSpace();
169 |         }
170 |       }
171 | 
172 |       // Match the opening tag.
173 |       if (!scanner.scan(openingTagRe))
174 |         break;
175 | 
176 |       hasTag = true;
177 | 
178 |       // Get the tag type.
179 |       type = scanner.scan(tagRe) || 'name';
180 |       scanner.scan(whiteRe);
181 | 
182 |       // Get the tag value.
183 |       if (type === '=') {
184 |         value = scanner.scanUntil(equalsRe);
185 |         scanner.scan(equalsRe);
186 |         scanner.scanUntil(closingTagRe);
187 |       } else if (type === '{') {
188 |         value = scanner.scanUntil(closingCurlyRe);
189 |         scanner.scan(curlyRe);
190 |         scanner.scanUntil(closingTagRe);
191 |         type = '&';
192 |       } else {
193 |         value = scanner.scanUntil(closingTagRe);
194 |       }
195 | 
196 |       // Match the closing tag.
197 |       if (!scanner.scan(closingTagRe))
198 |         throw new Error('Unclosed tag at ' + scanner.pos);
199 | 
200 |       token = [ type, value, start, scanner.pos ];
201 |       tokens.push(token);
202 | 
203 |       if (type === '#' || type === '^') {
204 |         sections.push(token);
205 |       } else if (type === '/') {
206 |         // Check section nesting.
207 |         openSection = sections.pop();
208 | 
209 |         if (!openSection)
210 |           throw new Error('Unopened section "' + value + '" at ' + start);
211 | 
212 |         if (openSection[1] !== value)
213 |           throw new Error('Unclosed section "' + openSection[1] + '" at ' + start);
214 |       } else if (type === 'name' || type === '{' || type === '&') {
215 |         nonSpace = true;
216 |       } else if (type === '=') {
217 |         // Set the tags for the next time around.
218 |         compileTags(value);
219 |       }
220 |     }
221 | 
222 |     // Make sure there are no open sections when we're done.
223 |     openSection = sections.pop();
224 | 
225 |     if (openSection)
226 |       throw new Error('Unclosed section "' + openSection[1] + '" at ' + scanner.pos);
227 | 
228 |     return nestTokens(squashTokens(tokens));
229 |   }
230 | 
231 |   /**
232 |    * Combines the values of consecutive text tokens in the given `tokens` array
233 |    * to a single token.
234 |    */
235 |   function squashTokens (tokens) {
236 |     var squashedTokens = [];
237 | 
238 |     var token, lastToken;
239 |     for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
240 |       token = tokens[i];
241 | 
242 |       if (token) {
243 |         if (token[0] === 'text' && lastToken && lastToken[0] === 'text') {
244 |           lastToken[1] += token[1];
245 |           lastToken[3] = token[3];
246 |         } else {
247 |           squashedTokens.push(token);
248 |           lastToken = token;
249 |         }
250 |       }
251 |     }
252 | 
253 |     return squashedTokens;
254 |   }
255 | 
256 |   /**
257 |    * Forms the given array of `tokens` into a nested tree structure where
258 |    * tokens that represent a section have two additional items: 1) an array of
259 |    * all tokens that appear in that section and 2) the index in the original
260 |    * template that represents the end of that section.
261 |    */
262 |   function nestTokens (tokens) {
263 |     var nestedTokens = [];
264 |     var collector = nestedTokens;
265 |     var sections = [];
266 | 
267 |     var token, section;
268 |     for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
269 |       token = tokens[i];
270 | 
271 |       switch (token[0]) {
272 |         case '#':
273 |         case '^':
274 |           collector.push(token);
275 |           sections.push(token);
276 |           collector = token[4] = [];
277 |           break;
278 |         case '/':
279 |           section = sections.pop();
280 |           section[5] = token[2];
281 |           collector = sections.length > 0 ? sections[sections.length - 1][4] : nestedTokens;
282 |           break;
283 |         default:
284 |           collector.push(token);
285 |       }
286 |     }
287 | 
288 |     return nestedTokens;
289 |   }
290 | 
291 |   /**
292 |    * A simple string scanner that is used by the template parser to find
293 |    * tokens in template strings.
294 |    */
295 |   function Scanner (string) {
296 |     this.string = string;
297 |     this.tail = string;
298 |     this.pos = 0;
299 |   }
300 | 
301 |   /**
302 |    * Returns `true` if the tail is empty (end of string).
303 |    */
304 |   Scanner.prototype.eos = function eos () {
305 |     return this.tail === '';
306 |   };
307 | 
308 |   /**
309 |    * Tries to match the given regular expression at the current position.
310 |    * Returns the matched text if it can match, the empty string otherwise.
311 |    */
312 |   Scanner.prototype.scan = function scan (re) {
313 |     var match = this.tail.match(re);
314 | 
315 |     if (!match || match.index !== 0)
316 |       return '';
317 | 
318 |     var string = match[0];
319 | 
320 |     this.tail = this.tail.substring(string.length);
321 |     this.pos += string.length;
322 | 
323 |     return string;
324 |   };
325 | 
326 |   /**
327 |    * Skips all text until the given regular expression can be matched. Returns
328 |    * the skipped string, which is the entire tail if no match can be made.
329 |    */
330 |   Scanner.prototype.scanUntil = function scanUntil (re) {
331 |     var index = this.tail.search(re), match;
332 | 
333 |     switch (index) {
334 |       case -1:
335 |         match = this.tail;
336 |         this.tail = '';
337 |         break;
338 |       case 0:
339 |         match = '';
340 |         break;
341 |       default:
342 |         match = this.tail.substring(0, index);
343 |         this.tail = this.tail.substring(index);
344 |     }
345 | 
346 |     this.pos += match.length;
347 | 
348 |     return match;
349 |   };
350 | 
351 |   /**
352 |    * Represents a rendering context by wrapping a view object and
353 |    * maintaining a reference to the parent context.
354 |    */
355 |   function Context (view, parentContext) {
356 |     this.view = view;
357 |     this.cache = { '.': this.view };
358 |     this.parent = parentContext;
359 |   }
360 | 
361 |   /**
362 |    * Creates a new context using the given view with this context
363 |    * as the parent.
364 |    */
365 |   Context.prototype.push = function push (view) {
366 |     return new Context(view, this);
367 |   };
368 | 
369 |   /**
370 |    * Returns the value of the given name in this context, traversing
371 |    * up the context hierarchy if the value is absent in this context's view.
372 |    */
373 |   Context.prototype.lookup = function lookup (name) {
374 |     var cache = this.cache;
375 | 
376 |     var value;
377 |     if (cache.hasOwnProperty(name)) {
378 |       value = cache[name];
379 |     } else {
380 |       var context = this, names, index, lookupHit = false;
381 | 
382 |       while (context) {
383 |         if (name.indexOf('.') > 0) {
384 |           value = context.view;
385 |           names = name.split('.');
386 |           index = 0;
387 | 
388 |           /**
389 |            * Using the dot notion path in `name`, we descend through the
390 |            * nested objects.
391 |            *
392 |            * To be certain that the lookup has been successful, we have to
393 |            * check if the last object in the path actually has the property
394 |            * we are looking for. We store the result in `lookupHit`.
395 |            *
396 |            * This is specially necessary for when the value has been set to
397 |            * `undefined` and we want to avoid looking up parent contexts.
398 |            **/
399 |           while (value != null && index < names.length) {
400 |             if (index === names.length - 1)
401 |               lookupHit = hasProperty(value, names[index]);
402 | 
403 |             value = value[names[index++]];
404 |           }
405 |         } else {
406 |           value = context.view[name];
407 |           lookupHit = hasProperty(context.view, name);
408 |         }
409 | 
410 |         if (lookupHit)
411 |           break;
412 | 
413 |         context = context.parent;
414 |       }
415 | 
416 |       cache[name] = value;
417 |     }
418 | 
419 |     if (isFunction(value))
420 |       value = value.call(this.view);
421 | 
422 |     return value;
423 |   };
424 | 
425 |   /**
426 |    * A Writer knows how to take a stream of tokens and render them to a
427 |    * string, given a context. It also maintains a cache of templates to
428 |    * avoid the need to parse the same template twice.
429 |    */
430 |   function Writer () {
431 |     this.cache = {};
432 |   }
433 | 
434 |   /**
435 |    * Clears all cached templates in this writer.
436 |    */
437 |   Writer.prototype.clearCache = function clearCache () {
438 |     this.cache = {};
439 |   };
440 | 
441 |   /**
442 |    * Parses and caches the given `template` and returns the array of tokens
443 |    * that is generated from the parse.
444 |    */
445 |   Writer.prototype.parse = function parse (template, tags) {
446 |     var cache = this.cache;
447 |     var tokens = cache[template];
448 | 
449 |     if (tokens == null)
450 |       tokens = cache[template] = parseTemplate(template, tags);
451 | 
452 |     return tokens;
453 |   };
454 | 
455 |   /**
456 |    * High-level method that is used to render the given `template` with
457 |    * the given `view`.
458 |    *
459 |    * The optional `partials` argument may be an object that contains the
460 |    * names and templates of partials that are used in the template. It may
461 |    * also be a function that is used to load partial templates on the fly
462 |    * that takes a single argument: the name of the partial.
463 |    */
464 |   Writer.prototype.render = function render (template, view, partials) {
465 |     var tokens = this.parse(template);
466 |     var context = (view instanceof Context) ? view : new Context(view);
467 |     return this.renderTokens(tokens, context, partials, template);
468 |   };
469 | 
470 |   /**
471 |    * Low-level method that renders the given array of `tokens` using
472 |    * the given `context` and `partials`.
473 |    *
474 |    * Note: The `originalTemplate` is only ever used to extract the portion
475 |    * of the original template that was contained in a higher-order section.
476 |    * If the template doesn't use higher-order sections, this argument may
477 |    * be omitted.
478 |    */
479 |   Writer.prototype.renderTokens = function renderTokens (tokens, context, partials, originalTemplate) {
480 |     var buffer = '';
481 | 
482 |     var token, symbol, value;
483 |     for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
484 |       value = undefined;
485 |       token = tokens[i];
486 |       symbol = token[0];
487 | 
488 |       if (symbol === '#') value = this.renderSection(token, context, partials, originalTemplate);
489 |       else if (symbol === '^') value = this.renderInverted(token, context, partials, originalTemplate);
490 |       else if (symbol === '>') value = this.renderPartial(token, context, partials, originalTemplate);
491 |       else if (symbol === '&') value = this.unescapedValue(token, context);
492 |       else if (symbol === 'name') value = this.escapedValue(token, context);
493 |       else if (symbol === 'text') value = this.rawValue(token);
494 | 
495 |       if (value !== undefined)
496 |         buffer += value;
497 |     }
498 | 
499 |     return buffer;
500 |   };
501 | 
502 |   Writer.prototype.renderSection = function renderSection (token, context, partials, originalTemplate) {
503 |     var self = this;
504 |     var buffer = '';
505 |     var value = context.lookup(token[1]);
506 | 
507 |     // This function is used to render an arbitrary template
508 |     // in the current context by higher-order sections.
509 |     function subRender (template) {
510 |       return self.render(template, context, partials);
511 |     }
512 | 
513 |     if (!value) return;
514 | 
515 |     if (isArray(value)) {
516 |       for (var j = 0, valueLength = value.length; j < valueLength; ++j) {
517 |         buffer += this.renderTokens(token[4], context.push(value[j]), partials, originalTemplate);
518 |       }
519 |     } else if (typeof value === 'object' || typeof value === 'string' || typeof value === 'number') {
520 |       buffer += this.renderTokens(token[4], context.push(value), partials, originalTemplate);
521 |     } else if (isFunction(value)) {
522 |       if (typeof originalTemplate !== 'string')
523 |         throw new Error('Cannot use higher-order sections without the original template');
524 | 
525 |       // Extract the portion of the original template that the section contains.
526 |       value = value.call(context.view, originalTemplate.slice(token[3], token[5]), subRender);
527 | 
528 |       if (value != null)
529 |         buffer += value;
530 |     } else {
531 |       buffer += this.renderTokens(token[4], context, partials, originalTemplate);
532 |     }
533 |     return buffer;
534 |   };
535 | 
536 |   Writer.prototype.renderInverted = function renderInverted (token, context, partials, originalTemplate) {
537 |     var value = context.lookup(token[1]);
538 | 
539 |     // Use JavaScript's definition of falsy. Include empty arrays.
540 |     // See https://github.com/janl/mustache.js/issues/186
541 |     if (!value || (isArray(value) && value.length === 0))
542 |       return this.renderTokens(token[4], context, partials, originalTemplate);
543 |   };
544 | 
545 |   Writer.prototype.renderPartial = function renderPartial (token, context, partials) {
546 |     if (!partials) return;
547 | 
548 |     var value = isFunction(partials) ? partials(token[1]) : partials[token[1]];
549 |     if (value != null)
550 |       return this.renderTokens(this.parse(value), context, partials, value);
551 |   };
552 | 
553 |   Writer.prototype.unescapedValue = function unescapedValue (token, context) {
554 |     var value = context.lookup(token[1]);
555 |     if (value != null)
556 |       return value;
557 |   };
558 | 
559 |   Writer.prototype.escapedValue = function escapedValue (token, context) {
560 |     var value = context.lookup(token[1]);
561 |     if (value != null)
562 |       return mustache.escape(value);
563 |   };
564 | 
565 |   Writer.prototype.rawValue = function rawValue (token) {
566 |     return token[1];
567 |   };
568 | 
569 |   mustache.name = 'mustache.js';
570 |   mustache.version = '2.2.1';
571 |   mustache.tags = [ '{{', '}}' ];
572 | 
573 |   // All high-level mustache.* functions use this writer.
574 |   var defaultWriter = new Writer();
575 | 
576 |   /**
577 |    * Clears all cached templates in the default writer.
578 |    */
579 |   mustache.clearCache = function clearCache () {
580 |     return defaultWriter.clearCache();
581 |   };
582 | 
583 |   /**
584 |    * Parses and caches the given template in the default writer and returns the
585 |    * array of tokens it contains. Doing this ahead of time avoids the need to
586 |    * parse templates on the fly as they are rendered.
587 |    */
588 |   mustache.parse = function parse (template, tags) {
589 |     return defaultWriter.parse(template, tags);
590 |   };
591 | 
592 |   /**
593 |    * Renders the `template` with the given `view` and `partials` using the
594 |    * default writer.
595 |    */
596 |   mustache.render = function render (template, view, partials) {
597 |     if (typeof template !== 'string') {
598 |       throw new TypeError('Invalid template! Template should be a "string" ' +
599 |                           'but "' + typeStr(template) + '" was given as the first ' +
600 |                           'argument for mustache#render(template, view, partials)');
601 |     }
602 | 
603 |     return defaultWriter.render(template, view, partials);
604 |   };
605 | 
606 |   // This is here for backwards compatibility with 0.4.x.,
607 |   /*eslint-disable */ // eslint wants camel cased function name
608 |   mustache.to_html = function to_html (template, view, partials, send) {
609 |     /*eslint-enable*/
610 | 
611 |     var result = mustache.render(template, view, partials);
612 | 
613 |     if (isFunction(send)) {
614 |       send(result);
615 |     } else {
616 |       return result;
617 |     }
618 |   };
619 | 
620 |   // Export the escaping function so that the user may override it.
621 |   // See https://github.com/janl/mustache.js/issues/244
622 |   mustache.escape = escapeHtml;
623 | 
624 |   // Export these mainly for testing, but also for advanced usage.
625 |   mustache.Scanner = Scanner;
626 |   mustache.Context = Context;
627 |   mustache.Writer = Writer;
628 | 
629 | }));
630 | 


--------------------------------------------------------------------------------
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