Chris@14: <?php declare(strict_types=1);
Chris@14: /*
Chris@14:  * This file is part of sebastian/diff.
Chris@14:  *
Chris@14:  * (c) Sebastian Bergmann <sebastian@phpunit.de>
Chris@14:  *
Chris@14:  * For the full copyright and license information, please view the LICENSE
Chris@14:  * file that was distributed with this source code.
Chris@14:  */
Chris@14: namespace SebastianBergmann\Diff\Output;
Chris@14: 
Chris@14: /**
Chris@14:  * Builds a diff string representation in a loose unified diff format
Chris@14:  * listing only changes lines. Does not include line numbers.
Chris@14:  */
Chris@14: final class DiffOnlyOutputBuilder implements DiffOutputBuilderInterface
Chris@14: {
Chris@14:     /**
Chris@14:      * @var string
Chris@14:      */
Chris@14:     private $header;
Chris@14: 
Chris@14:     public function __construct(string $header = "--- Original\n+++ New\n")
Chris@14:     {
Chris@14:         $this->header = $header;
Chris@14:     }
Chris@14: 
Chris@14:     public function getDiff(array $diff): string
Chris@14:     {
Chris@14:         $buffer = \fopen('php://memory', 'r+b');
Chris@14: 
Chris@14:         if ('' !== $this->header) {
Chris@14:             \fwrite($buffer, $this->header);
Chris@14:             if ("\n" !== \substr($this->header, -1, 1)) {
Chris@14:                 \fwrite($buffer, "\n");
Chris@14:             }
Chris@14:         }
Chris@14: 
Chris@14:         foreach ($diff as $diffEntry) {
Chris@14:             if ($diffEntry[1] === 1 /* ADDED */) {
Chris@14:                 \fwrite($buffer, '+' . $diffEntry[0]);
Chris@14:             } elseif ($diffEntry[1] === 2 /* REMOVED */) {
Chris@14:                 \fwrite($buffer, '-' . $diffEntry[0]);
Chris@14:             } elseif ($diffEntry[1] === 3 /* WARNING */) {
Chris@14:                 \fwrite($buffer, ' ' . $diffEntry[0]);
Chris@14: 
Chris@14:                 continue; // Warnings should not be tested for line break, it will always be there
Chris@14:             } else { /* Not changed (old) 0 */
Chris@14:                 continue; // we didn't write the non changs line, so do not add a line break either
Chris@14:             }
Chris@14: 
Chris@14:             $lc = \substr($diffEntry[0], -1);
Chris@14:             if ($lc !== "\n" && $lc !== "\r") {
Chris@14:                 \fwrite($buffer, "\n"); // \No newline at end of file
Chris@14:             }
Chris@14:         }
Chris@14: 
Chris@14:         $diff = \stream_get_contents($buffer, -1, 0);
Chris@14:         \fclose($buffer);
Chris@14: 
Chris@14:         return $diff;
Chris@14:     }
Chris@14: }