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<?php
namespace ByteUnits;
class Formatter
{
private $converter;
private $precision;
public function __construct($converter, $precision)
{
$this->converter = $converter;
$this->precision = $precision;
}
public function precision()
{
return $this->precision;
}
public function format($numberOfBytes, $howToFormat)
{
$precision = $this->precisionFrom($howToFormat);
$byteUnit = $this->byteUnitToFormatTo($numberOfBytes, $howToFormat);
return $this->formatInByteUnit($numberOfBytes, $byteUnit, $precision);
}
private function precisionFrom($howToFormat)
{
if (is_integer($howToFormat)) {
return $howToFormat;
}
if (is_string($howToFormat)) {
if (preg_match('/^.*\/(?<precision>0*)$/', $howToFormat, $matches)) {
return strlen($matches['precision']);
}
if (preg_match('/^.*\/(?<precision>\d+)$/', $howToFormat, $matches)) {
return intval($matches['precision']);
}
}
return $this->precision;
}
private function byteUnitToFormatTo($numberOfBytes, $howToFormat)
{
if (is_string($howToFormat)) {
if (preg_match("/^(?P<unit>[^\/]+)(?:\/.*$)?/i", $howToFormat, $matches)) {
if ($this->converter->isKnownUnit($matches['unit'])) {
return $this->converter->normalizeNameOfUnit($matches['unit']);
}
}
}
return $this->converter->normalUnitFor($numberOfBytes);
}
private function formatInByteUnit($numberOfBytes, $byteUnit, $precision)
{
$scaled = $this->converter->scaleToUnit($numberOfBytes, $byteUnit);
if($byteUnit == null) $byteUnit = "B";
if ($this->converter->isBaseUnit($byteUnit)) {
return sprintf("%d%s", $scaled, $byteUnit);
}
return sprintf("%.{$precision}f%s", $scaled, $byteUnit);
}
}