/**
* Calculate the checksum of the file
* As defined in the UOB documentation
* @return String
*/
public function getCheckSum()
{
$headers = [];
$checksum = 0;
$hashcode_index = 1;
$record_no = 1;
$lines = [];
$batch_header = new UOBBatchHeader($this->beneficiaries, $this->configKey);
$lines[] = $batch_header->getLine();
foreach ($this->beneficiaries as $beneficiary) {
$beneficiary_lines = UOBBeneficiaryFactory::create($beneficiary, $this->configKey);
$lines[] = collect($beneficiary_lines->getLines())->first();
}
$batch_trailer = new UOBBatchTrailer($this->beneficiaries, $this->configKey);
$lines[] = $batch_trailer->getLine();
foreach ($lines as $line) {
// printf("\nLine with value %s has length of %d", substr($line -> getString(),0, 100), strlen($line -> getString()));
$string = $line->getString();
$record_no++;
$column_no = 1;
for ($i = 0; $i < 900; $i++) {
$byte_code = ord($string[$i]);
if ($hashcode_index > 23) {
$hashcode_index = 1;
}
$checksum += $record_no + ($record_no + $column_no) * $byte_code * $this->getHashCodeArray($hashcode_index);
$hashcode_index++;
$column_no++;
}
}
return $checksum;
}
