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<?php
declare(strict_types=1);
namespace Baraja\PdfToImage;
final class Convertor
{
/** @throws \Error */
public function __construct()
{
throw new \Error('Class ' . static::class . ' is static and cannot be instantiated.');
}
/**
* Convert first page of PDF to image and save to disk.
*
* @throws ConvertorException
*/
public static function convert(Configuration $configuration): void
{
try {
self::process($configuration);
} catch (\ImagickException $e) {
throw new ConvertorException($e->getMessage(), $e->getCode(), $e);
}
}
/**
* @throws \ImagickException
*/
private static function process(Configuration $configuration): void
{
if (class_exists('\Imagick') === false) {
throw new \RuntimeException('Imagick is not installed.');
}
$im = new \Imagick($configuration->pdfPath);
$im->setImageFormat($configuration->format);
if ($configuration->cols !== null && $configuration->rows !== null) {
$im->scaleImage($configuration->cols, $configuration->rows, $configuration->bestfit);
}
if ($configuration->trim) {
$im->setImageBorderColor('rgb(255,255,255)');
$im->trimImage(1);
}
self::write($configuration->savePath, (string) $im);
}
/**
* Writes a string to a file. Moved from nette/utils
*
* @throws ConvertorException
*/
private static function write(string $file, string $content, ?int $mode = 0_666): void
{
self::createDir(dirname($file));
if (@file_put_contents($file, $content) === false) { // @ is escalated to exception
throw new ConvertorException(sprintf('Unable to write file "%s": %s', $file, self::getLastError()));
}
if ($mode !== null && !@chmod($file, $mode)) { // @ is escalated to exception
throw new ConvertorException(sprintf('Unable to chmod file "%s": %s', $file, self::getLastError()));
}
}
/**
* Creates a directory. Moved from nette/utils
*
* @throws ConvertorException
*/
private static function createDir(string $dir, int $mode = 0_777): void
{
if (!is_dir($dir) && !@mkdir($dir, $mode, true) && !is_dir($dir)) { // @ - dir may already exist
throw new ConvertorException(sprintf('Unable to create directory "%s": %s', $dir, self::getLastError()));
}
}
private static function getLastError(): string
{
return (string) preg_replace('#^\w+\(.*?\): #', '', error_get_last()['message'] ?? '');
}
}