release: v3.1.0 premium smart core engines and 14 new accessibility rules

src/Core/Diff/VisualDiffGenerator.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace YakNet\AccessibilityConsole\Core\Diff;
+
+use SebastianBergmann\Diff\Differ;
+use SebastianBergmann\Diff\Output\UnifiedDiffOutputBuilder;
+
+class VisualDiffGenerator
+{
+    private Differ $differ;
+
+    public function __construct()
+    {
+        $this->differ = new Differ(new UnifiedDiffOutputBuilder("--- Original\n+++ Healed\n"));
+    }
+
+    /**
+     * Generate a colorized git-style unified diff string.
+     *
+     * @param string $original
+     * @param string $fixed
+     * @return string
+     */
+    public function generate(string $original, string $fixed): string
+    {
+        $diff = $this->differ->diff($original, $fixed);
+        $lines = explode("\n", $diff);
+        
+        $colorized = [];
+        foreach ($lines as $line) {
+            if (str_starts_with($line, '+') && !str_starts_with($line, '+++')) {
+                $colorized[] = "<fg=green>" . htmlspecialchars($line) . "</>";
+            } elseif (str_starts_with($line, '-') && !str_starts_with($line, '---')) {
+                $colorized[] = "<fg=red>" . htmlspecialchars($line) . "</>";
+            } elseif (str_starts_with($line, '@@')) {
+                $colorized[] = "<fg=cyan>" . htmlspecialchars($line) . "</>";
+            } elseif (str_starts_with($line, '---') || str_starts_with($line, '+++')) {
+                $colorized[] = "<fg=gray>" . htmlspecialchars($line) . "</>";
+            } else {
+                $colorized[] = htmlspecialchars($line);
+            }
+        }
+
+        return implode("\n", $colorized);
+    }
+}