Adjust DOM-related functions to work with HTML

Author: stloyd

src/core/etl/src/Flow/ETL/Function/DOMElementAttributeValue.php

@@ -18,12 +18,19 @@ public function __construct(
 
     public function eval(Row $row) : ?string
     {
-        $node = (new Parameter($this->domElement))->as(
-            $row,
+        $types = [
             type_instance_of(\DOMNode::class),
             type_list(type_instance_of(\DOMNode::class)),
-            type_instance_of(HTMLElement::class),
-            type_list(type_instance_of(HTMLElement::class))
+        ];
+
+        if (\class_exists('\Dom\HTMLElement')) {
+            $types[] = type_instance_of(HTMLElement::class);
+            $types[] = type_list(type_instance_of(HTMLElement::class));
+        }
+
+        $node = (new Parameter($this->domElement))->as(
+            $row,
+            ...$types
         );
 
         if ($node instanceof \DOMDocument) {

src/core/etl/src/Flow/ETL/Function/DOMElementAttributesCount.php

@@ -16,7 +16,15 @@ public function __construct(private readonly ScalarFunction|\DOMNode|HTMlElement
 
     public function eval(Row $row) : ?int
     {
-        $domElement = (new Parameter($this->domElement))->as($row, type_instance_of(\DOMElement::class), type_instance_of(HTMlElement::class));
+        $types = [
+            type_instance_of(\DOMNode::class),
+        ];
+
+        if (\class_exists('\Dom\HTMLElement')) {
+            $types[] = type_instance_of(HTMLElement::class);
+        }
+
+        $domElement = (new Parameter($this->domElement))->as($row, ...$types);
 
         if ($domElement === null) {
             return null;

src/core/etl/src/Flow/ETL/Function/DOMElementValue.php

@@ -16,12 +16,19 @@ public function __construct(private readonly ScalarFunction|\DOMNode|HTMLElement
 
     public function eval(Row $row) : mixed
     {
-        $node = (new Parameter($this->node))->as(
-            $row,
+        $types = [
             type_instance_of(\DOMNode::class),
             type_list(type_instance_of(\DOMNode::class)),
-            type_instance_of(HTMLElement::class),
-            type_list(type_instance_of(HTMLElement::class))
+        ];
+
+        if (\class_exists('\Dom\HTMLElement')) {
+            $types[] = type_instance_of(HTMLElement::class);
+            $types[] = type_list(type_instance_of(HTMLElement::class));
+        }
+
+        $node = (new Parameter($this->node))->as(
+            $row,
+            ...$types
         );
 
         if (\is_array($node) && \count($node)) {