libsignal/node/ts/zkgroup/calllinks/CreateCallLinkCredentialRequestContext.ts

//
// Copyright 2023 Signal Messenger, LLC.
// SPDX-License-Identifier: AGPL-3.0-only
//

import { randomBytes } from 'node:crypto';

import ByteArray from '../internal/ByteArray.js';
import { RANDOM_LENGTH } from '../internal/Constants.js';
import * as Native from '../../Native.js';

import CreateCallLinkCredentialRequest from './CreateCallLinkCredentialRequest.js';
import CreateCallLinkCredentialResponse from './CreateCallLinkCredentialResponse.js';
import CreateCallLinkCredential from './CreateCallLinkCredential.js';
import GenericServerPublicParams from '../GenericServerPublicParams.js';
import { Aci } from '../../Address.js';

export default class CreateCallLinkCredentialRequestContext extends ByteArray {
  private readonly __type?: never;

  constructor(contents: Uint8Array<ArrayBuffer>) {
    super(
      contents,
      Native.CreateCallLinkCredentialRequestContext_CheckValidContents
    );
  }

  static forRoomId(
    roomId: Uint8Array<ArrayBuffer>
  ): CreateCallLinkCredentialRequestContext {
    const random = randomBytes(RANDOM_LENGTH);
    return this.forRoomIdWithRandom(roomId, random);
  }

  static forRoomIdWithRandom(
    roomId: Uint8Array<ArrayBuffer>,
    random: Uint8Array<ArrayBuffer>
  ): CreateCallLinkCredentialRequestContext {
    return new CreateCallLinkCredentialRequestContext(
      Native.CreateCallLinkCredentialRequestContext_NewDeterministic(
        roomId,
        random
      )
    );
  }

  getRequest(): CreateCallLinkCredentialRequest {
    return new CreateCallLinkCredentialRequest(
      Native.CreateCallLinkCredentialRequestContext_GetRequest(this.contents)
    );
  }

  receive(
    response: CreateCallLinkCredentialResponse,
    userId: Aci,
    params: GenericServerPublicParams
  ): CreateCallLinkCredential {
    return new CreateCallLinkCredential(
      Native.CreateCallLinkCredentialRequestContext_ReceiveResponse(
        this.contents,
        response.contents,
        userId.getServiceIdFixedWidthBinary(),
        params.contents
      )
    );
  }
}