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<?php declare(strict_types=1);
/*
* This file is part of sebastian/diff.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\Diff\Output;
use function fclose;
use function fopen;
use function fwrite;
use function stream_get_contents;
use function substr;
use SebastianBergmann\Diff\Differ;
/**
* Builds a diff string representation in a loose unified diff format
* listing only changes lines. Does not include line numbers.
*/
final class DiffOnlyOutputBuilder implements DiffOutputBuilderInterface
{
/**
* @var string
*/
private $header;
public function __construct(string $header = "--- Original\n+++ New\n")
{
$this->header = $header;
}
public function getDiff(array $diff): string
{
$buffer = fopen('php://memory', 'r+b');
if ('' !== $this->header) {
fwrite($buffer, $this->header);
if ("\n" !== substr($this->header, -1, 1)) {
fwrite($buffer, "\n");
}
}
foreach ($diff as $diffEntry) {
if ($diffEntry[1] === Differ::ADDED) {
fwrite($buffer, '+' . $diffEntry[0]);
} elseif ($diffEntry[1] === Differ::REMOVED) {
fwrite($buffer, '-' . $diffEntry[0]);
} elseif ($diffEntry[1] === Differ::DIFF_LINE_END_WARNING) {
fwrite($buffer, ' ' . $diffEntry[0]);
continue; // Warnings should not be tested for line break, it will always be there
} else { /* Not changed (old) 0 */
continue; // we didn't write the non changs line, so do not add a line break either
}
$lc = substr($diffEntry[0], -1);
if ($lc !== "\n" && $lc !== "\r") {
fwrite($buffer, "\n"); // \No newline at end of file
}
}
$diff = stream_get_contents($buffer, -1, 0);
fclose($buffer);
return $diff;
}
}