Swiss Payment – ESR Codeline Generator

/**
* Function for generating ESR-numbers for orange swiss payment slips (so called "Oranger Einzahlungsschein").
*
* @author Jason Rubichi, Nicolas Zanotti
* @param
*    bc: fix, 01 or 04
*    chf: dynamic, amount in chf without rappen, must have eight chars minimum (if less than eight chars, insert zeros before)
*    rappen: dynamic, amount in rappen
*    help1, help2, help3: fix, "+" or ">", no editing required
*    referenceNumber: dynamic, contains matag number, zeros, client number and job number
*    participantNumber: dynamic, bankaccount number
*
* @usage generateCodeline("01", "4378", "85", ">", "94476300000000128001105152", "+", "01200027", ">");
*/
function generateCodeline(bc, chf, rappen, help1, referenceNumber, help2, participantNumber, help3) {
	
	function moduloTenRecursive(number) {
		var table = [0, 9, 4, 6, 8, 2, 7, 1, 3, 5];
		var carryover = 0;
		var numbers = number.split("");

		for (var i = 0, j = 0; i < numbers.length; i++) {
			j = parseInt(carryover, 10) + parseInt(numbers[i], 10);
			carryover = table[j % 10];
		}

		var result = (10 - carryover) % 10;
		return result;
	}

	var editedChf;
	var chfLength = chf.length;
	var zeros = "";
	if (chfLength < 8) { //check if amount has less than eight chars
		var zerosAmount = 8 - chfLength;
		for (var i = 0; i < zerosAmount; i++) {
			zeros += "0"; //generate String with zeros
		}
		editedChf = zeros.concat(chf); //insert zeros before amount to have eight chars
	} else {
		editedChf = chf;
	}

	// dynamic, check digit for bc and value (calculated with modulo 10 recursive)
	var p1 = moduloTenRecursive(bc + editedChf + rappen);

	// dynamic, check digit for referenceNumber (calculated with modulo 10 recursive)
	var p2 = moduloTenRecursive(referenceNumber);

	// dynamic, check digit for participantNumber (calculated with modulo 10 recursive)
	var p3 = moduloTenRecursive(participantNumber);

	return bc + editedChf + rappen + p1 + help1 + referenceNumber + p2 + help2 + " " + participantNumber + p3 + help3;
}

This logic has now been tested and documentend and put into its own package at npmjs.com/package/esr-code-line.