Slack: Chat Post

// (c) 2018, Questetra, Inc. (the MIT License)

//// == OAuth2 Setting example ==
// Authorization Endpoint URL: "https://slack.com/oauth/authorize"
// Token Endpoint URL: "https://slack.com/api/oauth.access"
// Scope: "chat:write:bot" (or "bot" etc)
// Client ID: ( from https://api.slack.com/apps )
// Consumer Secret: ( from https://api.slack.com/apps )
// -more- https://api.slack.com/methods/chat.postMessage


//////// START "main()" ////////
main();
function main(){ 

//// == Config Retrieving / 工程コンフィグの参照 ==
const channel = configs.get( "conf_Channel" ) + "";
const oauth2  = configs.get( "conf_OAuth2" ) + "";
const dataIdC = configs.get( "conf_DataIdC" ) + "";
// 'java.lang.String' (String Obj) to javascript primitive 'string'
if( channel === "" ){
  throw new Error( " SLACK CHANNEL not specified" );
}

//// == Data Retrieving / ワークフローデータの参照 ==
const myText  = engine.findDataByNumber( dataIdC ) + "";


//// == Calculating / 演算 ==
// obtain OAuth2 Access Token
const token   = httpClient.getOAuth2Token( oauth2 );

// prepare API Request
let apiRequest = httpClient.begin(); // HttpRequestWrapper
// - com.questetra.bpms.core.event.scripttask.HttpClientWrapper
apiRequest     = apiRequest.formParam( "token", token );
// not "apiRequest.bearer( token )"
apiRequest     = apiRequest.formParam( "channel", channel );
apiRequest     = apiRequest.formParam( "text", myText );

// access API (with post(), get(), put(), etc.)
const response = apiRequest.post( "https://slack.com/api/chat.postMessage" );
// - HttpResponseWrapper
const httpStatus  = response.getStatusCode() + "";
engine.log( "STATUS: " + httpStatus );
const responseStr = response.getResponseAsString() + "";
engine.log( "RESPONSE: \n" + responseStr );


//// == Data Updating / ワークフローデータへの代入 ==
// (nothing)

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