session-desktop/ts/session/messages/outgoing/controlMessage/group/ClosedGroupNameChangeMessage.ts

import { Constants } from '../../../..';
import { SignalService } from '../../../../../protobuf';
import {
  ClosedGroupMessage,
  ClosedGroupMessageParams,
} from './ClosedGroupMessage';

interface ClosedGroupNameChangeMessageParams extends ClosedGroupMessageParams {
  name: string;
}

export class ClosedGroupNameChangeMessage extends ClosedGroupMessage {
  private readonly name: string;

  constructor(params: ClosedGroupNameChangeMessageParams) {
    super({
      timestamp: params.timestamp,
      identifier: params.identifier,
      groupId: params.groupId,
      expireTimer: params.expireTimer,
    });
    this.name = params.name;
    if (this.name.length === 0) {
      throw new Error('name cannot be empty');
    }
  }

  public dataProto(): SignalService.DataMessage {
    const dataMessage = super.dataProto();

    // tslint:disable: no-non-null-assertion
    dataMessage.closedGroupControlMessage!.type =
      SignalService.DataMessage.ClosedGroupControlMessage.Type.NAME_CHANGE;
    dataMessage.closedGroupControlMessage!.name = this.name;

    return dataMessage;
  }

  public ttl(): number {
    return Constants.TTL_DEFAULT.REGULAR_MESSAGE;
  }
}