/**
* {@inheritdoc}
*/
protected function execute(InputInterface $input, OutputInterface $output)
{
$number = $input->getArgument(self::NUMBER_ARGUMENT);
$number = $this->filter->filter($number);
$decimalFormat = $this->factory->make($number);
$scientificNotation = $this->transformer->transform($decimalFormat);
$output->writeLn((string) $scientificNotation);
}
/**
* Return new ScientificNotation entity
*
* @param string $notation
* @return ScientificNotation
*/
public function make($notation)
{
if (!preg_match(self::SCIENTIFIC_NOTATION_PATTERN, $notation, $matches)) {
throw new InvalidScientificNotationException($notation);
}
$coefficient = $this->numberFactory->make($matches['coefficient']);
$exponent = $this->integerFactory->make($matches['exponent']);
return new ScientificNotation($coefficient, $exponent);
}
/**
* Transform notation entity into numeric
*
* @param NotationInterface $notation
* @return Entity\Number
*/
public function transform(NotationInterface $notation)
{
$exponent = $notation->getExponent();
$coefficient = $notation->getCoefficient();
$integer = $coefficient->getInteger();
$padLength = strlen($integer->getValue()) + abs($exponent->getValue());
$result = str_pad($integer->getValue(), $padLength, '0', $exponent->isNegative() ? STR_PAD_LEFT : STR_PAD_RIGHT);
if ($exponent->isNegative()) {
$result = sprintf('%s%s', $result, $coefficient->getFractional());
$result = substr_replace($result, '.', 1, 0);
} else {
$result = substr_replace($result, $coefficient->getFractional(), strlen($integer->getValue()), strlen($coefficient->getFractional()));
if ($coefficient->isFloat()) {
$result = substr_replace($result, '.', (int) $exponent->getValue() + 1, 0);
}
}
$result = sprintf('%s%s', $coefficient->getInteger()->getSign(), $result);
return $this->numberFactory->make($result);
}
