/**
* @file Todo application with a tiny MVC Framework.
* @author Felix Yang
*/
/* eslint-disable-next-line */
jQuery(function($) {
'use strict'
var Global = window || {}
var Router = Global.Router || {}
var Handlebars = Global.Handlebars || {}
var KEYBOARD = {
ENTER_KEY: 13,
ESCAPE_KEY: 27
}
/**
* Create application instance with tiny MVC.
* @param {object} options
* @returns {object}
*/
var createMvcApp = (function () {
var App = {
version: '1.0.0'
}
var util = {
pluralize: function (count, word) {
return count === 1 ? word : word + 's'
}
}
/**
* Create a MVC Model.
* @class
* @param {object} options
*/
App.Model = function mvcModel (options) {
this.options = options || {}
this.init()
}
App.Model.prototype = {
constructor: App.Model,
init: function () {
this.data = this.options.data || {}
},
getTodos: function () {
return this.data.todos
},
setTodos: function (todos) {
this.data.todos = todos
},
getFilter: function () {
return this.data.filter
},
setFilter: function (filter) {
this.data.filter = filter
},
addTodo: function (todo) {
todo = $.extend(
{
id: this.genUuid()
},
todo
)
this.data.todos.push(todo)
},
getFilteredTodos: function () {
var filter = this.getFilter()
if (filter === 'active') {
return this.getActiveTodos()
}
if (filter === 'completed') {
return this.getCompletedTodos()
}
return this.data.todos
},
getActiveTodos: function () {
return this.data.todos.filter(function (todo) {
return !todo.completed
})
},
getCompletedTodos: function () {
return this.data.todos.filter(function (todo) {
return todo.completed
})
},
getTodoById: function (id) {
return this.data.todos.find(function (todo) {
return todo.id === id
})
},
updateTodo: function (id, title) {
var todo = this.getTodoById(id)
if (todo) {
todo.title = title
}
},
toggle: function (id) {
var todo = this.getTodoById(id)
if (todo) {
todo.completed = !todo.completed
}
},
toggleAll: function (completed) {
this.data.todos.forEach(function (todo) {
todo.completed = completed
})
},
destroy: function (id) {
this.data.todos = this.data.todos.filter(function (todo) {
return todo.id !== id
})
},
destroyCompleted: function () {
this.setTodos(this.getActiveTodos())
},
genUuid: function () {
var i, random
var uuid = ''
for (i = 0; i < 32; i++) {
random = (Math.random() * 16) | 0
if (i === 8 || i === 12 || i === 16 || i === 20) {
uuid += '-'
}
uuid += (i === 12
? 4
: i === 16
? (random & 3) | 8
: random
).toString(16)
}
return uuid
}
}
/**
* Create a MVC View.
* @class
* @param {object} options
*/
App.View = function mvcView (options) {
this.options = options || {}
this.init()
}
App.View.prototype = {
constructor: App.View,
init: function () {
this.$el = $(this.options.el)
this.todoTemplate = this.compile('#todo-template')
this.footerTemplate = this.compile('#footer-template')
this.bindEvents()
},
on: function (event, selector, fn) {
if (arguments.length > 2) {
this.$el.on(event, selector, fn)
} else {
fn = selector
this.$el.on(event, fn)
}
return this
},
find: function (selector) {
return this.$el.find(selector)
},
compile: function (selector) {
return Handlebars.compile($(selector).html())
},
render: function () {
var self = this
var model = self.controller.getModel()
var todos = model.getFilteredTodos()
self.find('.todo-list').html(self.todoTemplate(todos))
self.find('.main').toggle(todos.length > 0)
self
.find('.toggle-all')
.prop('checked', model.getActiveTodos().length === 0)
self.find('.new-todo').focus()
self.renderFooter()
},
renderFooter: function () {
var self = this
var model = self.controller.getModel()
var todoCount = model.getTodos().length
var activeTodoCount = model.getActiveTodos().length
var template = self.footerTemplate({
activeTodoCount: activeTodoCount,
activeTodoWord: util.pluralize(activeTodoCount, 'item'),
completedTodos: todoCount - activeTodoCount,
filter: model.getFilter()
})
self
.find('.footer')
.toggle(todoCount > 0)
.html(template)
},
bindEvents: function () {
var self = this
self.on('keyup', '.new-todo', this.create.bind(this))
self.on('change', '.toggle-all', this.toggleAll.bind(this))
self.on('click', '.clear-completed', this.destroyCompleted.bind(this))
self
.on('change', '.toggle', this.toggle.bind(this))
.on('dblclick', '.title', this.editTodo.bind(this))
.on('keyup', '.edit', this.editKeyup.bind(this))
.on('focusout', '.edit', this.update.bind(this))
.on('click', '.destroy', this.destroy.bind(this))
},
toggleAll: function (e) {
var self = this
var completed = $(e.target).prop('checked')
self.controller.getModel().toggleAll(completed)
self.render()
},
destroyCompleted: function () {
var self = this
self.controller.getModel().destroyCompleted()
self.render()
},
create: function (e) {
var self = this
var $element = $(e.target)
var todoTask = $element.val().trim()
if (e.which !== KEYBOARD.ENTER_KEY || !todoTask) {
return
}
self.controller.getModel().addTodo({
title: todoTask,
completed: false
})
$element.val('')
self.render()
},
toggle: function (e) {
var self = this
var $el = $(e.target)
var id = $el.closest('li').data('id')
self.controller.getModel().toggle(id)
self.render()
},
editTodo: function (e) {
var $input = $(e.target)
.closest('li')
.addClass('editing')
.find('.edit')
var tempValue = $input.val()
$input
.val('')
.val(tempValue)
.focus()
},
editKeyup: function (e) {
if (e.which === KEYBOARD.ENTER_KEY) {
e.target.blur()
}
if (e.which === KEYBOARD.ESCAPE_KEY) {
$(e.target)
.data('abort', true)
.blur()
}
},
update: function (e) {
var self = this
var model = self.controller.getModel()
var $el = $(e.target)
var id = $el.closest('li').data('id')
var todoTask = $el.val().trim()
if ($el.data('abort')) {
$el.data('abort', false)
} else if (!todoTask) {
model.destroy(id)
return
} else {
model.updateTodo(id, todoTask)
}
self.render()
},
destroy: function (e) {
var self = this
var $el = $(e.target)
var id = $el.closest('li').data('id')
self.controller.getModel().destroy(id)
self.render()
}
}
/**
* Create a MVC Controller.
* @class
* @param {object} options
*/
App.Controller = function mvcController (options) {
this.options = options || {}
this.view = this.options.view
this.model = this.options.model
this.init(options)
}
App.Controller.prototype = {
constructor: App.Controller,
init: function () {
this.view.controller = this.model.controller = this
this.router = new Router({
'/:filter': function (filter) {
this.model.setFilter(filter)
this.view.render()
}.bind(this)
}).init('/all')
},
getView: function () {
return this.view
},
getModel: function () {
return this.model
}
}
return function (options) {
var app = {}
app.view = new App.View(options)
app.model = new App.Model(options)
app.controller = new App.Controller(
$.extend(
{
view: app.view,
model: app.model
},
options
)
)
return app
}
})()
Handlebars.registerHelper('eq', function (a, b, options) {
return a === b ? options.fn(this) : options.inverse(this)
})
// run application
createMvcApp({
el: '.todoapp',
data: {
todos: [
{
id: 'todo-001',
title: 'Do Some X'
},
{
id: 'todo-002',
title: 'Do Some Y',
completed: true
},
{
id: 'todo-003',
title: 'Do Some Z'
}
]
}
})
})
<!DOCTYPE html>
<html lang="en" data-framework="jquery">
<head>
<meta charset="utf-8" />
<title>Formotor • TodoMVC</title>
<link rel="stylesheet" href="css/app.css" />
</head>
<body>
<section class="todoapp">
<header class="header">
<h1>todos</h1>
<input
class="new-todo"
placeholder="What needs to be done?"
autofocus
/>
</header>
<section class="main">
<input id="toggle-all" class="toggle-all" type="checkbox" />
<label for="toggle-all">Mark all as complete</label>
<ul class="todo-list"></ul>
</section>
<footer class="footer"></footer>
</section>
<footer class="info">
<p>Double-click to edit a todo</p>
<p>Created by <a href="https://felixpy.com">Felix Yang</a></p>
<p>Part of <a href="https://felixpy.github.io/formotor">Formotor</a></p>
</footer>
<script id="todo-template" type="text/x-handlebars-template">
{{#this}}
<li {{#if completed}}class="completed"{{/if}} data-id="{{id}}">
<div class="view">
<input class="toggle" type="checkbox" {{#if completed}}checked{{/if}}>
<label class="title">{{title}}</label>
<button class="destroy"></button>
</div>
<input class="edit" value="{{title}}">
</li>
{{/this}}
</script>
<script id="footer-template" type="text/x-handlebars-template">
<span class="todo-count"><strong>{{activeTodoCount}}</strong> {{activeTodoWord}} left</span>
<ul class="filters">
<li>
<a {{#eq filter 'all'}}class="selected"{{/eq}} href="#/all">All</a>
</li>
<li>
<a {{#eq filter 'active'}}class="selected"{{/eq}}href="#/active">Active</a>
</li>
<li>
<a {{#eq filter 'completed'}}class="selected"{{/eq}}href="#/completed">Completed</a>
</li>
</ul>
{{#if completedTodos}}<button class="clear-completed">Clear completed</button>{{/if}}
</script>
<script src="//cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
<script src="//cdn.bootcss.com/handlebars.js/4.0.12/handlebars.min.js"></script>
<script src="//cdn.bootcss.com/Director/1.2.8/director.min.js"></script>
<script src="//unpkg.com/formotor"></script>
</body>
</html>