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20extracting-todo-todolist.html
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<!DOCTYPE html>
<html>
<head>
<script src="https://fb.me/react-0.14.0.js"></script>
<script src="https://fb.me/react-dom-0.14.0.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.23/browser.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/redux/3.0.4/redux.js"></script>
<script src="https://wzrd.in/standalone/expect@latest"></script>
<script src="https://wzrd.in/standalone/deep-freeze@latest"></script>
</head>
<body>
<div id="root"></div>
<script type="text/babel">
const todo = (state, action) => {
switch(action.type){
case 'ADD_TODO':
return {
id: action.id,
text: action.text,
completed: false
};
case 'TOGGLE_TODO':
if(state.id !== action.id){
return state;
}
return {
...state,
completed: !state.completed
};
default:
return state;
}
};
const todos = (state=[], action) => {
console.log(action.type);
switch (action.type){
case 'ADD_TODO':
return [
...state,
todo(undefined, action)
];
case 'TOGGLE_TODO':
return state.map(t => todo(t, action));
default:
return state;
}
};
const visibilityFilter = (
state = 'SHOW_ALL',
action
) => {
switch (action.type){
case 'SET_VISIBILITY_FILTER':
return action.filter;
default:
return state;
}
};
const { combineReducers } = Redux;
const todoApp = combineReducers({
todos,
visibilityFilter
});
const { createStore } = Redux;
const store = createStore(todoApp);
const { Component} = React;
const FilterLink = ({
filter,
currentFilter,
children
}) => {
if(filter === currentFilter){
return <span> {children} </span>
}
return (
<a href='#'
onClick = { e => {
e.preventDefault();
store.dispatch({
type: 'SET_VISIBILITY_FILTER',
filter
});
}}
>
{children}
</a>
);
};
const Todo = ({
onClick,
completed,
text
}) => (
<li
onClick={onClick}
style={{
textDecoration: completed ? 'line-through' : 'none'
}}
>
{text}
</li>
);
const TodoList = ({
todos,
onTodoClick
}) => (
<ul>
{todos.map(todo =>
<Todo
key={todo.id}
{...todo}
onClick={() => onTodoClick(todo.id)}
/>
)}
</ul>
);
const getVisibleTodos = (todos, filter) => {
switch (filter) {
case 'SHOW_ALL':
return todos;
break;
case 'SHOW_ACTIVE':
return todos.filter(t => !t.completed);
break;
case 'SHOW_COMPLETED':
return todos.filter(t => t.completed);
break;
default:
break;
}
}
let nextTodoId = 0;
class TodoApp extends Component{
render() {
const {
todos,
visibilityFilter
} = this.props;
const visibleTodos = getVisibleTodos(todos, visibilityFilter);
return(
<div>
<input ref={node => {
this.input = node;
}} />
<button onClick={() => {
store.dispatch({
type: 'ADD_TODO',
text: this.input.value,
id: nextTodoId++
});
this.input.value='';
}}>
Add Todo
</button>
<TodoList
todos={visibleTodos}
onTodoClick={id => store.dispatch({
type: 'TOGGLE_TODO',
id
})}
/>
<p>
Show:
{' '}
<FilterLink filter = 'SHOW_ALL' currentFilter={visibilityFilter} > ALL </FilterLink>
{' '}
<FilterLink filter = 'SHOW_ACTIVE' currentFilter={visibilityFilter} > Active </FilterLink>
{' '}
<FilterLink filter = 'SHOW_COMPLETED' currentFilter={visibilityFilter} > Completed </FilterLink>
</p>
</div>
);
}
}
const render = () => {
ReactDOM.render(
<TodoApp
{...store.getState()}
/>,
document.getElementById('root')
);
};
store.subscribe(render);
render();
</script>
</body>
</html>