TSV String; Sum of Number Column

// GraalJS Script (engine type: 2)
// (c) 2021, Questetra, Inc. (the MIT License)

/*
=input tsv=
A1	10000	C1
A2	$9900	C2
A3	10800	C3
=column id=
1
=output value=
20800
*/

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


//// == Config Retrieving / 工程コンフィグの参照 ==
const dataIdA = configs.get( "conf_DataIdA" ) + ""; // config required
const columnB = configs.get( "conf_ColumnB" ) + ""; // config required
const dataIdC = configs.get( "conf_DataIdC" ) + ""; // config required
// 'java.lang.String' to javascript primitive 'string' by ""

engine.log( " AutomatedTask Config: ID of Numeric Column: " + columnB );

// Design-time Config Format Check
const intColumnB  = parseInt( columnB );
if ( isNaN( intColumnB )){
  throw new Error( "\n AutomatedTask ConfigError:" +
                   " Config {ID of Numeric Column} is not an integer \n" );
}


//// == Data Retrieving / ワークフローデータの参照 ==
// Run-time Data Format Check
if( engine.findDataByNumber( dataIdA ) === null ){
  throw new Error( "\n AutomatedTask UnexpectedStringError:" +
                   " String {A} as TSV is null \n" );
}
const inputText = (engine.findDataByNumber( dataIdA ) + "").trim();
if( inputText === "" ){
  throw new Error( "\n AutomatedTask UnexpectedStringError:" +
                   " String {A} as TSV is empty \n" );
}


//// == Calculating / 演算 ==
let   outputNum = 0;
const arrInputText = inputText.split("\n");
engine.log( " AutomatedTask MultilineString:" + 
            " String {A} as TSV, number of lines: " + arrInputText.length );

for( let i = 0; i < arrInputText.length; i++ ){
  let arrCellValues = arrInputText[i].split("\t");
  let strValueB = arrCellValues[ intColumnB ];
  let numValueB = parseFloat( strValueB );
  // Run-time Data Format Check
  if ( isNaN( numValueB )){
    engine.log( " AutomatedTask StringWarning:" +
                " CellStr is not numeric at " + i +  ": " + strValueB );
    numValueB = 0;
  }
  outputNum += numValueB;
}


//// == Data Updating / ワークフローデータへの代入 ==
engine.setDataByNumber( dataIdC, new java.math.BigDecimal( outputNum ) );


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