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step 9 exercise complete!
This commit is contained in:
Ken
@@ -1,3 +1,19 @@
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# Step 2.9
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actions with service calls
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Redux Thunk middleware for actions with service calls. The documentation is here:
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https://github.com/reduxjs/redux-thunk
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Action creators are a natural place to put service calls. Redux thunk middleware passes in the `dispatch()` and `getState()` from the store into the action creators. This allows the action creator itself to dispatch different actions in between async side effects. Combined with the async / await syntax, coding service calls is a cinch!
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Most of the time, in a single-page app, we apply **optimistic UI updates**. We can update the UI before the network call completes so the UI feels more responsive.
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# Exercise
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1. open up `exercise/src/service/index.ts` and study the signature of the functions to call the service such as the `add()` function
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2. open `exercise/src/actions/index.ts` and fill in the missing content inside `actionsWithService`
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- note that the `complete` and `clear` functions require you to write your own wrapper function
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3. open `exercise/src/index.tsx` and follow the instructions in the TODO comment to make the app prepopulate with data from the service.
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@@ -11,7 +11,7 @@ export async function add(id: string, todo: TodoItem) {
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return await response.json();
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}
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export async function edit(id: string, todo: TodoItem) {
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export async function update(id: string, todo: TodoItem) {
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const response = await fetch(`${HOST}/todos/${id}`, {
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method: 'put',
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headers: { 'content-type': 'application/json' },
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@@ -37,7 +37,7 @@ export async function getAll() {
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return await response.json();
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}
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export async function editBulk(todos: Store['todos']) {
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export async function updateAll(todos: Store['todos']) {
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const response = await fetch(`${HOST}/todos`, {
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method: 'post',
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headers: { 'content-type': 'application/json' },
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6
step2-09/exercise/index.html
Normal file
6
step2-09/exercise/index.html
Normal file
@@ -0,0 +1,6 @@
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<!DOCTYPE html>
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<html>
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<body>
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<div id="app"></div>
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</body>
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</html>
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51
step2-09/exercise/src/actions/index.ts
Normal file
51
step2-09/exercise/src/actions/index.ts
Normal file
@@ -0,0 +1,51 @@
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import uuid from 'uuid/v4';
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import { Store } from '../store';
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import * as service from '../service';
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export const actions = {
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addTodo: (label: string) => ({ type: 'addTodo', id: uuid(), label }),
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remove: (id: string) => ({ type: 'remove', id }),
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complete: (id: string) => ({ type: 'complete', id }),
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clear: () => ({ type: 'clear' }),
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setFilter: (filter: string) => ({ type: 'setFilter', filter })
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};
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export const actionsWithService = {
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addTodo: (label: string) => {
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return async (dispatch: any, getState: () => Store) => {
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// Replace the return true with:
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// 1. first call the actions.addTodo() function
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// 2. store the resultant id
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// 3. dispatch the action message generated by that call
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// 4. pass the id and the todo from the state into the service call service.add()
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return true;
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};
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},
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remove: (id: string) => {
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return async (dispatch: any, getState: () => Store) => {
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// Replace the return true with:
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// 1. dispatch a remove action with the id
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// 2. await on the call to the service.remove()
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return true;
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};
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},
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complete: (id: string) => {
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// ** Now it's your turn to write the thunk! **
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// Replace the return Promise.resolve(true) with:
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// 1. return an async function with the arguments of dispatch and getState
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// 2. dispatch a remove action with the id
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// 3. await on the call to the service.update()
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return Promise.resolve(true);
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},
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clear: () => {
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// ** Write your own thunk again! **
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// Replace the return Promise.resolve(true) with:
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// 1. return an async function with the arguments of dispatch and getState
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// 2. dispatch a clear action
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// 3. await on the call to the service.updateAll()
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return Promise.resolve(true);
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}
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};
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36
step2-09/exercise/src/components/TodoApp.tsx
Normal file
36
step2-09/exercise/src/components/TodoApp.tsx
Normal file
@@ -0,0 +1,36 @@
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import React from 'react';
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import { Stack, Customizer, mergeStyles, getTheme } from 'office-ui-fabric-react';
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import { TodoFooter } from './TodoFooter';
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import { TodoHeader } from './TodoHeader';
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import { TodoList } from './TodoList';
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import { Store } from '../store';
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import { FluentCustomizations } from '@uifabric/fluent-theme';
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const className = mergeStyles({
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padding: 25,
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...getTheme().effects.elevation4
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});
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export class TodoApp extends React.Component<any, Store> {
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constructor(props) {
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super(props);
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this.state = {
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todos: {},
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filter: 'all'
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};
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}
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render() {
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const { filter, todos } = this.state;
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return (
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<Customizer {...FluentCustomizations}>
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<Stack horizontalAlign="center">
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<Stack style={{ width: 400 }} gap={25} className={className}>
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<TodoHeader />
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<TodoList />
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<TodoFooter />
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</Stack>
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</Stack>
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</Customizer>
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);
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}
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}
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42
step2-09/exercise/src/components/TodoFooter.tsx
Normal file
42
step2-09/exercise/src/components/TodoFooter.tsx
Normal file
@@ -0,0 +1,42 @@
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import React from 'react';
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import { Text } from '@uifabric/experiments';
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import { Stack } from 'office-ui-fabric-react';
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import { Store } from '../store';
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import { DefaultButton } from 'office-ui-fabric-react';
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import { connect } from 'react-redux';
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import { actionsWithService } from '../actions';
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interface TodoFooterProps {
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clear: () => void;
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todos: Store['todos'];
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}
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const TodoFooter = (props: TodoFooterProps) => {
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const itemCount = Object.keys(props.todos).filter(id => !props.todos[id].completed).length;
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return (
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<Stack horizontal horizontalAlign="space-between">
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<Text>
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{itemCount} item{itemCount > 1 ? 's' : ''} left
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</Text>
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<DefaultButton onClick={() => props.clear()}>Clear Completed</DefaultButton>
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</Stack>
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);
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};
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function mapStateToProps(state: Store) {
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return { ...state };
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}
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function mapDispatchToProps(dispatch: any) {
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return {
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clear: () => dispatch(actionsWithService.clear())
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};
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}
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const component = connect(
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mapStateToProps,
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mapDispatchToProps
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)(TodoFooter);
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export { component as TodoFooter };
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78
step2-09/exercise/src/components/TodoHeader.tsx
Normal file
78
step2-09/exercise/src/components/TodoHeader.tsx
Normal file
@@ -0,0 +1,78 @@
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import React from 'react';
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import { Text } from '@uifabric/experiments';
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import { Stack } from 'office-ui-fabric-react';
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import { Pivot, PivotItem, TextField, PrimaryButton } from 'office-ui-fabric-react';
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import { FilterTypes, Store } from '../store';
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import { actionsWithService, actions } from '../actions';
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import { connect } from 'react-redux';
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interface TodoHeaderProps {
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addTodo: (label: string) => void;
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setFilter: (filter: FilterTypes) => void;
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filter: FilterTypes;
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}
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interface TodoHeaderState {
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labelInput: string;
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}
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class TodoHeader extends React.Component<TodoHeaderProps, TodoHeaderState> {
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constructor(props: TodoHeaderProps) {
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super(props);
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this.state = { labelInput: undefined };
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}
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render() {
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return (
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<Stack gap={10}>
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<Stack horizontal horizontalAlign="center">
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<Text variant="xxLarge">todos</Text>
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</Stack>
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<Stack horizontal gap={10}>
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<Stack.Item grow>
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<TextField placeholder="What needs to be done?" value={this.state.labelInput} onChange={this.onChange} />
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</Stack.Item>
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<PrimaryButton onClick={this.onAdd}>Add</PrimaryButton>
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</Stack>
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<Pivot onLinkClick={this.onFilter}>
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<PivotItem headerText="all" />
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<PivotItem headerText="active" />
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<PivotItem headerText="completed" />
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</Pivot>
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</Stack>
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);
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}
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private onAdd = () => {
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this.props.addTodo(this.state.labelInput);
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this.setState({ labelInput: undefined });
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};
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private onChange = (evt: React.FormEvent<HTMLInputElement>, newValue: string) => {
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this.setState({ labelInput: newValue });
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};
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private onFilter = (item: PivotItem) => {
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this.props.setFilter(item.props.headerText as FilterTypes);
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};
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}
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function mapStateToProps(state: Store) {
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return { ...state };
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}
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function mapDispatchToProps(dispatch: any) {
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return {
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addTodo: (label: string) => dispatch(actionsWithService.addTodo(label)),
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setFilter: (filter: FilterTypes) => dispatch(actions.setFilter(filter))
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};
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}
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const component = connect(
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mapStateToProps,
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mapDispatchToProps
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)(TodoHeader);
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export { component as TodoHeader };
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40
step2-09/exercise/src/components/TodoList.tsx
Normal file
40
step2-09/exercise/src/components/TodoList.tsx
Normal file
@@ -0,0 +1,40 @@
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import React from 'react';
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import { Stack } from 'office-ui-fabric-react';
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import { TodoListItem } from './TodoListItem';
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import { Store, FilterTypes } from '../store';
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import { connect } from 'react-redux';
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interface TodoListProps {
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todos: Store['todos'];
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filter: FilterTypes;
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}
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const TodoList = (props: TodoListProps) => {
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const { filter, todos } = props;
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const filteredTodos = Object.keys(todos).filter(id => {
|
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return filter === 'all' || (filter === 'completed' && todos[id].completed) || (filter === 'active' && !todos[id].completed);
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});
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|
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return (
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<Stack gap={10}>
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{filteredTodos.map(id => (
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<TodoListItem key={id} id={id} />
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))}
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</Stack>
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);
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};
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|
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function mapStateToProps(state: Store) {
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return { ...state };
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}
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|
||||
function mapDispatchToProps(dispatch: any) {
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return {};
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}
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|
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const component = connect(
|
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mapStateToProps,
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mapDispatchToProps
|
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)(TodoList);
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|
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export { component as TodoList };
|
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48
step2-09/exercise/src/components/TodoListItem.tsx
Normal file
48
step2-09/exercise/src/components/TodoListItem.tsx
Normal file
@@ -0,0 +1,48 @@
|
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import React from 'react';
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import { Stack, Checkbox, IconButton, TextField, DefaultButton } from 'office-ui-fabric-react';
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import { Store } from '../store';
|
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import { connect } from 'react-redux';
|
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import { actionsWithService } from '../actions';
|
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|
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interface TodoListItemProps {
|
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id: string;
|
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todos: Store['todos'];
|
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remove: (id: string) => void;
|
||||
complete: (id: string) => void;
|
||||
}
|
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|
||||
class TodoListItem extends React.Component<TodoListItemProps, {}> {
|
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render() {
|
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const { todos, id, complete, remove } = this.props;
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const item = todos[id];
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|
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return (
|
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<Stack horizontal verticalAlign="center" horizontalAlign="space-between">
|
||||
<Checkbox label={item.label} checked={item.completed} onChange={() => complete(id)} />
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<div>
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<IconButton iconProps={{ iconName: 'Cancel' }} onClick={() => remove(id)} />
|
||||
</div>
|
||||
</Stack>
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
function mapStateToProps({ todos }: Store) {
|
||||
return {
|
||||
todos
|
||||
};
|
||||
}
|
||||
|
||||
function mapDispatchToProps(dispatch: any) {
|
||||
return {
|
||||
remove: (id: string) => dispatch(actionsWithService.remove(id)),
|
||||
complete: (id: string) => dispatch(actionsWithService.complete(id))
|
||||
};
|
||||
}
|
||||
|
||||
const component = connect(
|
||||
mapStateToProps,
|
||||
mapDispatchToProps
|
||||
)(TodoListItem);
|
||||
|
||||
export { component as TodoListItem };
|
||||
37
step2-09/exercise/src/index.tsx
Normal file
37
step2-09/exercise/src/index.tsx
Normal file
@@ -0,0 +1,37 @@
|
||||
import React from 'react';
|
||||
import ReactDOM from 'react-dom';
|
||||
import { reducer } from './reducers';
|
||||
import { applyMiddleware, createStore, compose } from 'redux';
|
||||
import thunk from 'redux-thunk';
|
||||
import { Provider } from 'react-redux';
|
||||
import { TodoApp } from './components/TodoApp';
|
||||
import { initializeIcons } from '@uifabric/icons';
|
||||
import { Store, FilterTypes } from './store';
|
||||
import * as service from './service';
|
||||
|
||||
/* Goop for making the Redux dev tool to work */
|
||||
declare var window: any;
|
||||
const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
|
||||
function createStoreWithDevTool(reducer, initialStore?: Store) {
|
||||
return createStore(reducer, initialStore, composeEnhancers(applyMiddleware(thunk)));
|
||||
}
|
||||
|
||||
(async () => {
|
||||
// TODO: to make the store pre-populate with data from the service,
|
||||
// replace the todos value below with a call to "await service.getAll()"
|
||||
const preloadStore = {
|
||||
todos: {},
|
||||
filter: 'all' as FilterTypes
|
||||
};
|
||||
|
||||
const store = createStoreWithDevTool(reducer, preloadStore);
|
||||
|
||||
initializeIcons();
|
||||
|
||||
ReactDOM.render(
|
||||
<Provider store={store}>
|
||||
<TodoApp />
|
||||
</Provider>,
|
||||
document.getElementById('app')
|
||||
);
|
||||
})();
|
||||
35
step2-09/exercise/src/reducers/index.ts
Normal file
35
step2-09/exercise/src/reducers/index.ts
Normal file
@@ -0,0 +1,35 @@
|
||||
import { Store } from '../store';
|
||||
import { addTodo, remove, complete, clear, setFilter } from './pureFunctions';
|
||||
import { combineReducers } from 'redux';
|
||||
|
||||
function todoReducer(state: Store['todos'] = {}, action: any): Store['todos'] {
|
||||
switch (action.type) {
|
||||
case 'addTodo':
|
||||
return addTodo(state, action.id, action.label);
|
||||
|
||||
case 'remove':
|
||||
return remove(state, action.id);
|
||||
|
||||
case 'clear':
|
||||
return clear(state);
|
||||
|
||||
case 'complete':
|
||||
return complete(state, action.id);
|
||||
}
|
||||
|
||||
return state;
|
||||
}
|
||||
|
||||
function filterReducer(state: Store['filter'] = 'all', action: any): Store['filter'] {
|
||||
switch (action.type) {
|
||||
case 'setFilter':
|
||||
return setFilter(state, action.filter);
|
||||
}
|
||||
|
||||
return state;
|
||||
}
|
||||
|
||||
export const reducer = combineReducers({
|
||||
todos: todoReducer,
|
||||
filter: filterReducer
|
||||
});
|
||||
29
step2-09/exercise/src/reducers/pureFunctions.spec.ts
Normal file
29
step2-09/exercise/src/reducers/pureFunctions.spec.ts
Normal file
@@ -0,0 +1,29 @@
|
||||
import { addTodo, complete } from './pureFunctions';
|
||||
import { Store } from '../store';
|
||||
|
||||
describe('TodoApp reducers', () => {
|
||||
it('can add an item', () => {
|
||||
const state = <Store['todos']>{};
|
||||
|
||||
const newState = addTodo(state, '0', 'item1');
|
||||
|
||||
const keys = Object.keys(newState);
|
||||
|
||||
expect(newState).not.toBe(state);
|
||||
expect(keys.length).toBe(1);
|
||||
expect(newState[keys[0]].label).toBe('item1');
|
||||
expect(newState[keys[0]].completed).toBeFalsy();
|
||||
});
|
||||
|
||||
it('can complete an item', () => {
|
||||
const state = <Store['todos']>{};
|
||||
|
||||
let newState = addTodo(state, '0', 'item1');
|
||||
|
||||
const key = Object.keys(newState)[0];
|
||||
|
||||
newState = complete(newState, key);
|
||||
|
||||
expect(newState[key].completed).toBeTruthy();
|
||||
});
|
||||
});
|
||||
40
step2-09/exercise/src/reducers/pureFunctions.ts
Normal file
40
step2-09/exercise/src/reducers/pureFunctions.ts
Normal file
@@ -0,0 +1,40 @@
|
||||
import { Store, FilterTypes } from '../store';
|
||||
|
||||
export function addTodo(state: Store['todos'], id: string, label: string): Store['todos'] {
|
||||
return { ...state, [id]: { label, completed: false } };
|
||||
}
|
||||
|
||||
export function edit(state: Store['todos'], id: string, label: string): Store['todos'] {
|
||||
return { ...state, [id]: { ...state[id], label } };
|
||||
}
|
||||
|
||||
export function remove(state: Store['todos'], id: string) {
|
||||
const newTodos = { ...state };
|
||||
|
||||
delete newTodos[id];
|
||||
|
||||
return newTodos;
|
||||
}
|
||||
|
||||
export function complete(state: Store['todos'], id: string) {
|
||||
const newTodos = { ...state };
|
||||
newTodos[id].completed = !newTodos[id].completed;
|
||||
|
||||
return newTodos;
|
||||
}
|
||||
|
||||
export function clear(state: Store['todos']) {
|
||||
const newTodos = { ...state };
|
||||
|
||||
Object.keys(state.todos).forEach(key => {
|
||||
if (state.todos[key].completed) {
|
||||
delete newTodos[key];
|
||||
}
|
||||
});
|
||||
|
||||
return newTodos;
|
||||
}
|
||||
|
||||
export function setFilter(state: Store['filter'], filter: FilterTypes) {
|
||||
return filter;
|
||||
}
|
||||
48
step2-09/exercise/src/service/index.ts
Normal file
48
step2-09/exercise/src/service/index.ts
Normal file
@@ -0,0 +1,48 @@
|
||||
import { TodoItem, Store } from '../store';
|
||||
const HOST = 'http://localhost:3000';
|
||||
|
||||
export async function add(id: string, todo: TodoItem) {
|
||||
const response = await fetch(`${HOST}/todos/${id}`, {
|
||||
method: 'post',
|
||||
headers: { 'content-type': 'application/json' },
|
||||
body: JSON.stringify(todo)
|
||||
});
|
||||
|
||||
return await response.json();
|
||||
}
|
||||
|
||||
export async function update(id: string, todo: TodoItem) {
|
||||
const response = await fetch(`${HOST}/todos/${id}`, {
|
||||
method: 'put',
|
||||
headers: { 'content-type': 'application/json' },
|
||||
body: JSON.stringify(todo)
|
||||
});
|
||||
|
||||
return await response.json();
|
||||
}
|
||||
|
||||
export async function remove(id: string) {
|
||||
const response = await fetch(`${HOST}/todos/${id}`, {
|
||||
method: 'delete'
|
||||
});
|
||||
|
||||
return await response.json();
|
||||
}
|
||||
|
||||
export async function getAll() {
|
||||
const response = await fetch(`${HOST}/todos`, {
|
||||
method: 'get'
|
||||
});
|
||||
|
||||
return await response.json();
|
||||
}
|
||||
|
||||
export async function updateAll(todos: Store['todos']) {
|
||||
const response = await fetch(`${HOST}/todos`, {
|
||||
method: 'post',
|
||||
headers: { 'content-type': 'application/json' },
|
||||
body: JSON.stringify(todos)
|
||||
});
|
||||
|
||||
return await response.json();
|
||||
}
|
||||
14
step2-09/exercise/src/store/index.ts
Normal file
14
step2-09/exercise/src/store/index.ts
Normal file
@@ -0,0 +1,14 @@
|
||||
export type FilterTypes = 'all' | 'active' | 'completed';
|
||||
|
||||
export interface TodoItem {
|
||||
label: string;
|
||||
completed: boolean;
|
||||
}
|
||||
|
||||
export interface Store {
|
||||
todos: {
|
||||
[id: string]: TodoItem;
|
||||
};
|
||||
|
||||
filter: FilterTypes;
|
||||
}
|
||||
Reference in New Issue
Block a user