Major upgrade v2.0.0

src/Rules/HtmlHasLang.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace YakNet\AccessibilityConsole\Rules;
+
+use DOMElement;
+use YakNet\AccessibilityConsole\Core\Severity;
+use YakNet\AccessibilityConsole\Core\Violation;
+use YakNet\AccessibilityConsole\Core\WCAGStandard;
+
+class HtmlHasLang extends AbstractRule
+{
+    public function getId(): string { return 'WCAG_3_1_1_LANG'; }
+    public function getDescription(): string { return 'The html element must have a lang attribute.'; }
+    public function getStandard(): WCAGStandard { return WCAGStandard::A; }
+    public function getSeverity(): Severity { return Severity::ERROR; }
+
+    public function check(DOMElement $element): ?Violation
+    {
+        if (strtolower($element->tagName) !== 'html') {
+            return null;
+        }
+
+        if (!$element->hasAttribute('lang') || trim($element->getAttribute('lang')) === '') {
+            return $this->createViolation($element, $this->getDescription(), 'Add lang="en" (or your language) to the html tag.');
+        }
+
+        return null;
+    }
+}