Alexa×Slack連携！　アカウントリンクを使うスキルをC#で実装：特集：はじめてのAlexaスキル開発（1/3 ページ）

public class Function
{
  SkillResponse response = new SkillResponse
  {
    Version = "1.0",
    Response = new ResponseBody
    {
      ShouldEndSession = true
    }
  };

  public SkillResponse FunctionHandler(
    SkillRequest input, ILambdaContext context)
  {
    var token = input.Session.User.AccessToken;
    if (token == null)
      return ComposeMessage("認証が必要です");

    if (input.Request.Type == "LaunchRequest")
      return ComposeMessage("何でもSlackに投稿するよ");

    IntentRequest ir = input.Request as IntentRequest;

    if (ir == null)
      return null;

    var name = ir.Intent.Name;
    string text = "";
    switch (name)
    {
      case "AMAZON.CancelIntent":
      case "AMAZON.StopIntent":
        text = "終了します";
        return ComposeMessage(text);
      case "WantNotToWorkIntent":
        text = "この人、仕事したくないとかゆーてますよ（by Alexa）";
        break;
      case "WantNotToWriteIntent":
        text = "この人、原稿書く気ありませんわ（by Alexa）";
        break;
      case "WantToBeAbsentIntent":
        text = "この人、仮病で会社休もうとしてますよ！（by Alexa）";
        break;
      default:
        text = "この人、ダメな人ですわ（by Alexa）";
        break;
    }

    var result = Post2Slack(text, input.Session.User.AccessToken);
    if (result.IsSuccessStatusCode)
    {
      return ComposeMessage($"Slackに「{text}」て告げ口しときましたわ");
    }
    else
    {
      return ComposeMessage("Slackすら相手にしてくれませんわ");
    }
  }

  private SkillResponse ComposeMessage(string text)
  {
    response.Response.OutputSpeech = new PlainTextOutputSpeech
    {
      Text = text
    };
    return response;
  }

  private HttpResponseMessage Post2Slack(string msg, string token)
  {
    var client = new HttpClient();
    var content = new FormUrlEncodedContent(new Dictionary<string, string>
    {
      { "channel", "#general" },
      { "token", token },
      { "text", msg }
    });
    var task = client.PostAsync(
      "https://slack.com/api/chat.postMessage", content);
    task.Wait();
    var result = task.Result;
    return result;
  }
}

var token = input.Session.User.AccessToken;
if (token == null)
  return ComposeMessage("認証が必要です");

private HttpResponseMessage Post2Slack(string msg, string token)
{
  var client = new HttpClient();
  var content = new FormUrlEncodedContent(new Dictionary<string, string>
  {
    { "channel", "#general" },
    { "token", token },
    { "text", msg }
  });
  var task = client.PostAsync(
    "https://slack.com/api/chat.postMessage", content);
  task.Wait();
  var result = task.Result;
  return result;
}