<?php

declare(strict_types=1);

/*

* This file is part of the ALTO library.

*

* © 2025–present Simon André

*

* For full copyright and license information, please see

* the LICENSE file distributed with this source code.

*/

require __DIR__.'/../../vendor/autoload.php';

use Alto\Code\Diff\Diff;

use Alto\Code\Diff\Renderer\UnifiedRenderer;

echo "=== 1. Simple Line Diff ===\n";

$old = <<< 'EOF'

Hello

World

EOF;

$new = <<< 'EOF'

Hello

PHP

World

EOF;

$result = Diff::build()->compare($old, $new);

$renderer = new UnifiedRenderer();

echo $renderer->render($result)."\n";

echo "\n=== 2. Word-Level Changes ===\n";

$old = 'The quick brown fox';

$new = 'The fast brown fox';

$result = Diff::build()

->withWordDiff()

->compare($old, $new);

foreach ($result->hunks() as $hunk) {

foreach ($hunk->edits as $edit) {

if ($edit->wordSpans) {

foreach ($edit->wordSpans as $span) {

echo "{$span->op}: {$span->text}\n";

}

}

}

}

echo "\n=== 3. Ignore Whitespace ===\n";

$old = <<< 'EOF'

line1

line2

EOF;

$new = <<< 'EOF'

line1

line2

EOF;

$result = Diff::build()

->ignoreWhitespace()

->compare($old, $new);

echo 'Is empty? '.($result->isEmpty() ? 'Yes' : 'No')."\n";