Slack: Chat, Post Block

// GraalJS Script (engine type: 3)

//////// START "main()" /////////////////////////////////////////////////////////////////
// GraalJS Script (engine type: 3)

main();
function main(){ 

//// == Config Retrieving / 工程コンフィグの参照 ==

const oauth2SettingName = configs.get("AuthzConfU");
let oauth2 = null;
if (oauth2SettingName !== "") {
oauth2 = httpClient.findAuthSetting(oauth2SettingName, false);
}

  engine.log( " AutomatedTask Config: Authz Setting: " + oauth2SettingName );
const strSlackChannel     = configs.get      ( "StrConfA1" );    /// REQUIRED
  if( strSlackChannel   === "" ){
    throw new Error( "\n AutomatedTask ConfigError:" +
                     " Config {A1: SlackChannel} is empty \n" );
  }
const strThread           = configs.get      ( "StrConfA2" );    // NotRequired
  if( strThread         !== "" ){
    engine.log( " AutomatedTask ConfigWarning:" +
                " Message is posted in thread " + strThread );
  }
const strToUserId         = configs.get      ( "StrConfA3" );    // NotRequired
  if( strToUserId       !== "" ){
    engine.log( " AutomatedTask ConfigWarning:" +
                " Message is posted with Ephemeral mode " + strToUserId );
  }
const strMessageTitle     = configs.get      ( "StrConfB1" );    /// REQUIRED
  if( strMessageTitle   === "" ){
    throw new Error( "\n AutomatedTask ConfigError:" +
                     " Config {B1: Title} is empty \n" );
  }
const strMessageBody      = configs.get      ( "StrConfC1" );    /// REQUIRED
  if( strMessageBody    === "" ){
    throw new Error( "\n AutomatedTask ConfigError:" +
                     " Config {C1: Message} is empty \n" );
  }
const strTwocolTsv        = configs.get      ( "StrConfC2" );    // NotRequired
const strCategoryImgUrl   = configs.get      ( "StrConfC3" );    // NotRequired
const strPocketMessageTs  = configs.getObject( "SelectConfD1" ); // NotRequired


//// == Data Retrieving / ワークフローデータの参照 ==
// (Nothing. Some workflow data is referenced via Expression Language in Config.)


//// == Calculating / 演算 ==
/// TSV, Check Empty
let strKeyAndValue = "";
if( strTwocolTsv !== "" ){
  let arrRows = strTwocolTsv.split("\n");
  engine.log( " AutomatedTask Config:" +
              " TSV Rows " + arrRows.length );
  for( let i = 0; i < arrRows.length; i++ ){
    let arrCells = arrRows[i].split("\t");
    if( arrCells.length < 2 ){ // load stop with end line or illegal line
      engine.log( " AutomatedTask UnexpectedTsv line: " + i );
      break; 
    }
    for( let j = 0; j < 2; j++ ){
      if( arrCells[j] === "" ){
        strKeyAndValue += "n/a";
      }else{
        strKeyAndValue += arrCells[j];
      }
      strKeyAndValue += "\n";
    }
    if( i === 4 ){ break; } // up to 5
  }
  strKeyAndValue = strKeyAndValue.slice( 0, -1 );
}
/// Post Message
/// Slack API
/// https://api.slack.com/methods/chat.postMessage
/// https://api.slack.com/methods/chat.postEphemeral
/// https://api.slack.com/messaging/sending
/// https://api.slack.com/reference/messaging/payload
/// https://api.slack.com/reference/block-kit/blocks
// request1, prepare
let request1Obj = {};
    request1Obj.channel = strSlackChannel;
    if( strToUserId !== "" ){
      request1Obj.user = strToUserId;
    }
    request1Obj.text = strMessageTitle + "\n" + strMessageBody;
    if( strThread !== "" ){
      request1Obj.thread_ts = strThread;
    }
    request1Obj.blocks = [];
    request1Obj.blocks[0] = {};
    request1Obj.blocks[0].type = "header";
    request1Obj.blocks[0].text = {};
    request1Obj.blocks[0].text.type = "plain_text";
    request1Obj.blocks[0].text.text = strMessageTitle.slice(0,150); // MAX 150
    // https://api.slack.com/reference/block-kit/blocks#header
    request1Obj.blocks[0].text.emoji = true; // No format 'false'
    request1Obj.blocks[1] = {};
    request1Obj.blocks[1].type = "section";
    request1Obj.blocks[1].text = {};
    request1Obj.blocks[1].text.type = "mrkdwn"; // if "plain_text", newline \n not work.
    request1Obj.blocks[1].text.text = strMessageBody.slice(0,3000); // MAX 3000
    // https://api.slack.com/reference/block-kit/blocks#section
    if( strCategoryImgUrl !== "" ){
      request1Obj.blocks[1].accessory = {};
      request1Obj.blocks[1].accessory.type = "image";
      request1Obj.blocks[1].accessory.image_url = strCategoryImgUrl;
      request1Obj.blocks[1].accessory.alt_text  = "CategoryImg";
    }
    if( strKeyAndValue !== "" ){
      let arrKeyAndValue = strKeyAndValue.split("\n");
      request1Obj.blocks[1].fields = [];
      for( let i = 0; i < arrKeyAndValue.length; i++ ){
        request1Obj.blocks[1].fields[i] = {};
        request1Obj.blocks[1].fields[i].type = "mrkdwn"; // No format "plain_text"
        request1Obj.blocks[1].fields[i].text = arrKeyAndValue[i];
      }
    }
let request1Uri = "https://slack.com/api/chat.postMessage";
  if( strToUserId !== "" ){
    request1Uri = "https://slack.com/api/chat.postEphemeral";
  }
let request1    = httpClient.begin(); // HttpRequestWrapper
    request1    = request1.authSetting( oauth2 ); // with "Authorization: Bearer XX"
    // https://questetra.zendesk.com/hc/en-us/articles/360024574471-R2300#HttpRequestWrapper
    request1    = request1.body( JSON.stringify( request1Obj ), "application/json" );
// request1, try
const response1     = request1.post( request1Uri ); // HttpResponseWrapper
engine.log( " AutomatedTask ApiRequest1 Start: " + request1Uri );
const response1Code = response1.getStatusCode() + "";
const response1Body = response1.getResponseAsString() + "";
engine.log( " AutomatedTask ApiResponse Status: " + response1Code );
if( response1Code !== "200"){
  throw new Error( "\n AutomatedTask UnexpectedResponseError: " +
                    response1Code + "\n" + response1Body + "\n" );
}
// response1, parse
/* 
engine.log( response1Body ); // debug
{
  "ok":true,
  "channel":"C029A930R",
  "ts":"1622607940.003700",
  "message":{
    "bot_id":"B02471SR3BJ",
    "type":"message",
      # # #
    "ts":"1622607940.003700",
    "team":"T029A930F",
    "bot_profile":{
      # # #
    },
  }
}

== ephemeral ==
{
  "ok":true,
  "message_ts":"1622179598.000100"
}

== thread ==
{
  "ok":true,
  "channel":"C029A930R",
  "ts":"1622606758.003500",
  "message":{
    "bot_id":"B02471SR3BJ",
    "type":"message",
      # # #
    "ts":"1622606758.003500",
      # # #
    "bot_profile":{
      # # #
    },
    "blocks":[
      # # #
    ],
    "thread_ts":"1622602402.002700",
      # # #
  }
}
*/
const response1Obj = JSON.parse( response1Body );
if( response1Obj.ok !== true ){
  throw new Error( "\n AutomatedTask UnexpectedResponseError: " +
                    response1Code + "\n" + response1Body + "\n" );
}
if( response1Obj.hasOwnProperty('warning') ){
  engine.log( " AutomatedTask ApiResponse Warning: " + response1Obj.warning );
}


//// == Data Updating / ワークフローデータへの代入 ==
if( strPocketMessageTs !== null ){
  engine.setData( strPocketMessageTs, response1Obj.ts );
}

}
//////// END "main()" /////////////////////////////////////////////////////////////////