A todo example with @ngrx/store and store-saga
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March 18, 2016 01:23
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Angular2 + store-saga Todos
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| System.config({ | |
| //use typescript for compilation | |
| transpiler: 'typescript', | |
| //typescript compiler options | |
| typescriptOptions: { | |
| emitDecoratorMetadata: true | |
| }, | |
| //map tells the System loader where to look for things | |
| map: { | |
| app: "./src", | |
| '@ngrx': 'https://npmcdn.com/@ngrx', | |
| 'store-saga': 'https://npmcdn.com/[email protected]', | |
| 'rxjs': 'https://npmcdn.com/rxjs' | |
| }, | |
| //packages defines our app package | |
| packages: { | |
| app: { | |
| main: './main.ts', | |
| defaultExtension: 'ts' | |
| }, | |
| '@ngrx/store': { | |
| main: 'dist/index.js', | |
| defaultExtension: 'js' | |
| }, | |
| '@ngrx/devtools': { | |
| main: 'dist/index.js', | |
| defaultExtension: 'js' | |
| }, | |
| 'store-saga': { | |
| main: 'index.js', | |
| defaultExtension: 'js' | |
| }, | |
| 'rxjs': { | |
| main: 'index.js', | |
| defaultExtension: 'js' | |
| } | |
| } | |
| }); |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>angular2 playground</title> | |
| <link rel="stylesheet" href="style.css" /> | |
| <script src="https://code.angularjs.org/2.0.0-beta.10/angular2-polyfills.js"></script> | |
| <script src="https://code.angularjs.org/tools/system.js"></script> | |
| <script src="https://code.angularjs.org/tools/typescript.js"></script> | |
| <script src="config.js"></script> | |
| <script src="https://code.angularjs.org/2.0.0-beta.10/angular2.dev.js"></script> | |
| <script src="https://code.angularjs.org/2.0.0-beta.10/http.dev.js"></script> | |
| <script> | |
| System.import('app') | |
| .catch(console.error.bind(console)); | |
| </script> | |
| </head> | |
| <body> | |
| <my-app> | |
| loading... | |
| </my-app> | |
| </body> | |
| </html> |
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| //our root app component | |
| import {Component} from 'angular2/core' | |
| import {Observable} from 'rxjs/Rx' | |
| import {Store, provideStore} from '@ngrx/store' | |
| import {instrumentStore, Devtools} from '@ngrx/devtools' | |
| import {installSagaMiddleware} from 'store-saga'; | |
| import todoEffects from './sagas'; | |
| import {todos} from './todos' | |
| @Component({ | |
| selector: 'my-app', | |
| template: ` | |
| <ngrx-devtools></ngrx-devtools> | |
| <h2>Todos</h2> | |
| <input #newtodo type="text"/> | |
| <button (click)="addTodo(newtodo)">add</button> | |
| <ul> | |
| <li *ngFor="#todo of todos | async" [class.completed]="todo.completed"> | |
| {{todo.text}} | |
| </li> | |
| </ul> | |
| `, | |
| styles: [` | |
| .completed { | |
| text-decoration: line-through; | |
| } | |
| `], | |
| providers: [ | |
| provideStore({todos}), | |
| instrumentStore(), | |
| installSagaMiddleware(...todoEffects) | |
| ], | |
| directives: [Devtools] | |
| }) | |
| export class TodoApp { | |
| todos: Observable<any[]> | |
| constructor(private store:Store<any>){ | |
| this.todos = store.select('todos'); | |
| } | |
| addTodo(el){ | |
| this.store.dispatch({type: 'ADD_TODO', payload: { | |
| text: el.value | |
| }}); | |
| el.value = '' | |
| } | |
| } |
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| //main entry point | |
| import {bootstrap} from 'angular2/platform/browser'; | |
| import {TodoApp} from './app'; | |
| bootstrap(TodoApp) | |
| .catch(err => console.error(err)); |
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| import 'rxjs/add/operator/delay'; | |
| import { createSaga, whenAction } from 'store-saga'; | |
| import { ADD_TODO, COMPLETE_TODO } from './todos'; | |
| export const markAsComplete = createSaga(function() { | |
| return saga$ => saga$ | |
| .filter(whenAction(ADD_TODO)) | |
| .map(({ state }) => { | |
| const { todos } = state; | |
| const last = todos[todos.length - 1]; | |
| return { | |
| type: COMPLETE_TODO, | |
| payload: { | |
| id: last.id | |
| } | |
| }; | |
| }) | |
| .delay(1); | |
| }); | |
| export default [ markAsComplete ]; |
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| //todos reducer | |
| export const ADD_TODO = 'ADD_TODO'; | |
| export const UPDATE_TODO = 'UPDATE_TODO'; | |
| export const DELETE_TODO = 'DELETE_TODO'; | |
| export const COMPLETE_TODO = 'COMPLETE_TODO'; | |
| export const todos = (state = [], {type, payload}) => { | |
| switch(type){ | |
| case ADD_TODO: | |
| return state.concat([Object.assign({}, payload, {id: state.length + 1})]); | |
| case UPDATE_TODO: | |
| return state.map(todo => { | |
| return todo.id !== payload.id ? | |
| todo : | |
| Object.assign({}, todo, payload) | |
| }); | |
| case COMPLETE_TODO: | |
| return state.map(todo => { | |
| return todo.id !== payload.id ? | |
| todo : | |
| Object.assign({}, todo, {completed: true}) | |
| }); | |
| case DELETE_TODO: | |
| return state.filter(todo => todo.id !== payload.id); | |
| default: | |
| return state; | |
| } | |
| } |
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| /* Styles go here */ | |
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