Chat implementation in angular

Question 1

I currently have a parent component called chat and two child component named sidebar(consisting of user list) and conversation detail(consisting of chat with each user).. the functionality i want is if i click on any user present in sidebar i want the chat to open of that user on right side just like in WhatsApp web.. below is a small code of structuring of my components

Chat component(parent component)

<div class="container-fluid">
<div class="row">
    <div class="col-5">
        <app-sidebar></app-sidebar>
    </div>

    <div class="col-7">
        <app-conversation-detail></app-conversation-detail>
    </div>
</div>

Question 2

You can manage the state in the parent component itself and just pass the data to your sidebar and conversation-detail via @Input().

For starters, you could do something like this.

@Component({
  selector: 'my-app',
  template: `
  <div class="row">
    <div class="col-5">
        <app-sidebar [convoList]="convoList" (userSelected)="selectUser($event)"></app-sidebar>
    </div>
    <div class="col-7">
        <app-conversation-detail [conversation]="conversation">
        </app-conversation-detail>
    </div>
</div>`,
  styleUrls: ['./app.component.css'],
})
export class AppComponent {
  selectedUser = null;
  conversation = null;
  convoList = [];

  constructor(private conversationService: ConversationService) {}

  selectUser(user: string) {
    this.selectedUser = user;
    this.conversation = this.getConversationsOfUser(user);
  }

  getConversationsOfUser(user: string) {
    return this.conversationService.getConversationOfUser(user);
  }
}

You can also use a more reactive approach by using Observables.

Adithya Sreyaj · Answer 1 · 2021-11-24T07:44:56

You can manage the state in the parent component itself and just pass the data to your sidebar and conversation-detail via @Input().

For starters, you could do something like this.

@Component({
  selector: 'my-app',
  template: `
  <div class="row">
    <div class="col-5">
        <app-sidebar [convoList]="convoList" (userSelected)="selectUser($event)"></app-sidebar>
    </div>
    <div class="col-7">
        <app-conversation-detail [conversation]="conversation">
        </app-conversation-detail>
    </div>
</div>`,
  styleUrls: ['./app.component.css'],
})
export class AppComponent {
  selectedUser = null;
  conversation = null;
  convoList = [];

  constructor(private conversationService: ConversationService) {}

  selectUser(user: string) {
    this.selectedUser = user;
    this.conversation = this.getConversationsOfUser(user);
  }

  getConversationsOfUser(user: string) {
    return this.conversationService.getConversationOfUser(user);
  }
}

You can also use a more reactive approach by using Observables.

Chat implementation in angular

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