TSV String; Add Prefix to Column

// (c) 2019, Questetra, Inc. (the MIT License)

/*
=input tsv=
A1	B1	C1	10000
A2	B1	C1	10800
=Column ID=
3
=Prefix=
$
=BeginIndex=
2
=output tsv=
A1	B1	C1	10000	$000
A2	B1	C1	10800	$800
*/

//////// 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 (int)
const prefixC = configs.get( "conf_PrefixC" ) + ""; // config el-enabled
const beginIndex = configs.get( "conf_BeginIndex" ) + ""; // config required (int)
const dataIdE = configs.get( "conf_DataIdE" ) + ""; // config required
// 'java.lang.String' to javascript primitive 'string' by ""

engine.log( " AutomatedTask Config: ID of Numeric Column: " + columnB );
engine.log( " AutomatedTask Config: Prefix: " + prefixC );
engine.log( " AutomatedTask Config: Begin Index: " + beginIndex );

// 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" );
}
const intBeginIndex = parseInt( beginIndex );
if( isNaN( intBeginIndex )){
  throw new Error( "\n AutomatedTask ConfigError:" +
                   " Config {Begin Index} is not an integer \n" );
}
if( prefixC === "" ){
  engine.log( " AutomatedTask ConfigWarning:" +
              " Config {Prefix} is empty" );
}
if( prefixC.match(/\t/) !== null ){
  throw new Error( "\n AutomatedTask ConfigError or UnexpectedStringError:" +
                   " Config {Prefix}, Tab characters are not allowed. \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   outputText = "";
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 newValue  = prefixC + strValueB.slice( intBeginIndex );
  outputText += arrInputText[i] + "\t" + newValue;
  if( i !== arrInputText.length - 1 ){
    outputText += "\n";
  }
}


//// == Data Updating / ワークフローデータへの代入 ==
engine.setDataByNumber( dataIdE, outputText );


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