Angular Chat - Overview

import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxChatModule } from 'devextreme-angular'; import { User, Message, MessageEnteredEvent } from 'devextreme/ui/chat'; import { Observable } from 'rxjs'; import { AppService } from './app.service'; if (!/localhost/.test(document.location.host)) { enableProdMode(); } let modulePrefix = ''; // @ts-ignore if (window && window.config?.packageConfigPaths) { modulePrefix = '/app'; } @Component({ selector: 'demo-app', templateUrl: `app/app.component.html`, styleUrls: [`app/app.component.css`], }) export class AppComponent { currentUser: User; supportAgent: User; messages$: Observable<Message[]>; userChatTypingUsers$: Observable<User[]>; supportChatTypingUsers$: Observable<User[]>; constructor(private readonly appService: AppService) { [this.currentUser, this.supportAgent] = this.appService.getUsers(); this.messages$ = this.appService.messages$; this.userChatTypingUsers$ = this.appService.userChatTypingUsers$; this.supportChatTypingUsers$ = this.appService.supportChatTypingUsers$; } onMessageEntered(event: MessageEnteredEvent) { this.appService.onMessageEntered(event); } userChatOnTypingStart() { this.appService.userChatOnTypingStart(); } userChatOnTypingEnd() { this.appService.userChatOnTypingEnd(); } supportChatOnTypingStart() { this.appService.supportChatOnTypingStart(); } supportChatOnTypingEnd() { this.appService.supportChatOnTypingEnd(); } } @NgModule({ imports: [ BrowserModule, DxChatModule, ], declarations: [AppComponent], bootstrap: [AppComponent], providers: [AppService], }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);

.demo-container { display: flex; gap: 20px; } ::ng-deep .dx-chat { height: 710px; } ::ng-deep .dx-avatar { border: 1px solid var(--dx-color-border); }

import { Injectable } from '@angular/core'; import { Observable, BehaviorSubject } from 'rxjs'; import { User, Message, MessageEnteredEvent } from 'devextreme/ui/chat'; @Injectable({ providedIn: 'root', }) export class AppService { date: Date; currentUser: User = { id: 'c94c0e76-fb49-4b9b-8f07-9f93ed93b4f3', name: 'John Doe', }; supportAgent: User = { id: 'd16d1a4c-5c67-4e20-b70e-2991c22747c3', name: 'Support Agent', avatarUrl: '../../../../images/petersmith.png', }; messages: Message[] = []; userChatTypingUsersSubject: BehaviorSubject<User[]> = new BehaviorSubject([]); supportChatTypingUsersSubject: BehaviorSubject<User[]> = new BehaviorSubject([]); messagesSubject: BehaviorSubject<Message[]> = new BehaviorSubject([]); constructor() { this.date = new Date(); this.date.setHours(0, 0, 0, 0); this.messages = [ { timestamp: this.getTimestamp(this.date, -9), author: this.supportAgent, text: 'Hello, John!\nHow can I assist you today?', }, { timestamp: this.getTimestamp(this.date, -7), author: this.currentUser, text: 'Hi, I\'m having trouble accessing my account.', }, { timestamp: this.getTimestamp(this.date, -7), author: this.currentUser, text: 'It says my password is incorrect.', }, { timestamp: this.getTimestamp(this.date, -7), author: this.supportAgent, text: 'I can help you with that. Can you please confirm your UserID for security purposes?', }, { timestamp: this.getTimestamp(this.date, 1), author: this.currentUser, text: 'john.doe1357', }, { timestamp: this.getTimestamp(this.date, 1), author: this.supportAgent, text: '✅ Instructions to restore access have been sent to the email address associated with your account.', }, ]; this.messagesSubject.next(this.messages); this.userChatTypingUsersSubject.next([]); this.supportChatTypingUsersSubject.next([]); } get userChatTypingUsers$(): Observable<User[]> { return this.userChatTypingUsersSubject.asObservable(); } get supportChatTypingUsers$(): Observable<Message[]> { return this.supportChatTypingUsersSubject.asObservable(); } get messages$(): Observable<Message[]> { return this.messagesSubject.asObservable(); } getUsers(): User[] { return [this.currentUser, this.supportAgent]; } getTimestamp(date: Date, offsetMinutes = 0): number { return date.getTime() + offsetMinutes * 60000; } onMessageEntered(event: MessageEnteredEvent) { this.messages = [...this.messages, event.message]; this.messagesSubject.next(this.messages); } userChatOnTypingStart() { this.supportChatTypingUsersSubject.next([this.currentUser]); } userChatOnTypingEnd() { this.supportChatTypingUsersSubject.next([]); } supportChatOnTypingStart() { this.userChatTypingUsersSubject.next([this.supportAgent]); } supportChatOnTypingEnd() { this.userChatTypingUsersSubject.next([]); } }

// In real applications, you should not transpile code in the browser. // You can see how to create your own application with Angular and DevExtreme here: // https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/ const componentNames = [ 'accordion', 'action-sheet', 'autocomplete', 'bar-gauge', 'box', 'bullet', 'button-group', 'button', 'calendar', 'chart', 'chat', 'check-box', 'circular-gauge', 'color-box', 'context-menu', 'data-grid', 'date-box', 'date-range-box', 'defer-rendering', 'diagram', 'draggable', 'drawer', 'drop-down-box', 'drop-down-button', 'file-manager', 'file-uploader', 'filter-builder', 'form', 'funnel', 'gallery', 'gantt', 'html-editor', 'linear-gauge', 'list', 'load-indicator', 'load-panel', 'lookup', 'map', 'menu', 'multi-view', 'nested', 'number-box', 'pagination', 'pie-chart', 'pivot-grid-field-chooser', 'pivot-grid', 'polar-chart', 'popover', 'popup', 'progress-bar', 'radio-group', 'range-selector', 'range-slider', 'recurrence-editor', 'resizable', 'responsive-box', 'sankey', 'scheduler', 'scroll-view', 'select-box', 'slider', 'sortable', 'sparkline', 'speed-dial-action', 'splitter', 'switch', 'tab-panel', 'tabs', 'tag-box', 'text-area', 'text-box', 'tile-view', 'toast', 'toolbar', 'tooltip', 'tree-list', 'tree-map', 'tree-view', 'validation-group', 'validation-summary', 'validator', 'vector-map', ]; window.exports = window.exports || {}; window.config = { transpiler: 'ts', typescriptOptions: { module: 'system', emitDecoratorMetadata: true, experimentalDecorators: true, }, meta: { 'typescript': { 'exports': 'ts', }, 'devextreme/time_zone_utils.js': { 'esModule': true, }, 'devextreme/localization.js': { 'esModule': true, }, 'devextreme/viz/palette.js': { 'esModule': true, }, '@angular/platform-browser-dynamic': { 'esModule': true, }, '@angular/platform-browser': { 'esModule': true, }, '@angular/core': { 'esModule': true, }, '@angular/common': { 'esModule': true, }, '@angular/common/http': { 'esModule': true, }, '@angular/animations': { 'esModule': true, }, '@angular/forms': { 'esModule': true, }, 'openai': { 'esModule': true, }, }, paths: { 'npm:': 'https://cdn.jsdelivr.net/npm/', 'bundles:': '../../../../bundles/', 'externals:': '../../../../bundles/externals/', }, map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@4.2.4/lib/typescript.js', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', /* @angular */ '@angular/compiler': 'bundles:@angular/compiler.umd.js', '@angular/platform-browser-dynamic': 'bundles:@angular/platform-browser-dynamic.umd.js', '@angular/core': 'bundles:@angular/core.umd.js', '@angular/core/primitives/signals': 'bundles:@angular/core.primitives.signals.umd.js', '@angular/common': 'bundles:@angular/common.umd.js', '@angular/common/http': 'bundles:@angular/common-http.umd.js', '@angular/platform-browser': 'bundles:@angular/platform-browser.umd.js', '@angular/platform-browser/animations': 'bundles:@angular/platform-browser.umd.js', '@angular/forms': 'bundles:@angular/forms.umd.js', /* devextreme */ 'devextreme': 'npm:devextreme@24.2.7/cjs', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12', 'devextreme/bundles/dx.all': 'npm:devextreme@24.2.7/bundles/dx.all.js', 'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.16', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.60', /* devextreme-angular umd maps */ 'devextreme-angular': 'bundles:devextreme-angular/devextreme-angular.umd.js', 'devextreme-angular/core': 'bundles:devextreme-angular/devextreme-angular-core.umd.js', 'devextreme-angular/http': 'bundles:devextreme-angular/devextreme-angular-http.umd.js', ...componentNames.reduce((acc, name) => { acc[`devextreme-angular/ui/${name}`] = `bundles:devextreme-angular/devextreme-angular-ui-${name}.umd.js`; acc[`devextreme-angular/ui/${name}/nested`] = `bundles:devextreme-angular/devextreme-angular-ui-${name}-nested.umd.js`; return acc; }, {}), 'tslib': 'npm:tslib/tslib.js', 'rxjs': 'npm:rxjs@7.5.3/dist/bundles/rxjs.umd.js', 'rxjs/operators': 'npm:rxjs@7.5.3/dist/cjs/operators/index.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@3.4.4/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js', // Prettier 'prettier/standalone': 'npm:prettier@2.8.8/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js', }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts', }, 'devextreme': { defaultExtension: 'js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/common/core/events/utils': { main: 'index', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, 'rxjs': { defaultExtension: 'js', }, 'rxjs/operators': { defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.12/inferno/package.json', 'npm:rxjs@7.5.3/package.json', 'npm:rxjs@7.5.3/operators/package.json', 'npm:devexpress-diagram@2.2.16/package.json', 'npm:devexpress-gantt@4.1.60/package.json', ], }; System.config(window.config); // System.import('@angular/compiler').catch(console.error.bind(console));

<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" lang="en"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.2.7/css/dx.light.css" /> <script src="https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/zone.js@0.14.10/bundles/zone.umd.js"></script> <script src="https://cdn.jsdelivr.net/npm/reflect-metadata@0.1.13/Reflect.js"></script> <script src="https://cdn.jsdelivr.net/npm/systemjs@0.21.3/dist/system.js"></script> <script src="config.js"></script> <script> System.import("app").catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>