Merge branch 'main' into issue-3911issue-3911

1 files changed, 59 insertions, 0 deletions

diff --git a/lib/exTpl/ConditionNode.php b/lib/exTpl/ConditionNode.php
new file mode 100644
index 0000000..bab2121
--- /dev/null
+++ b/lib/exTpl/ConditionNode.php
@@ -0,0 +1,59 @@
+<?php
+
+namespace exTpl;
+
+/**
+ * ConditionNode represents a single condition tag:
+ * "{if CONDITION}...{else}...{endif}".
+ */
+class ConditionNode extends ArrayNode
+{
+    protected Expression $condition;
+    protected ArrayNode|null $else_node = null;
+
+    /**
+     * Initializes a new Node instance with the given expression.
+     *
+     * @param Expression $condition expression object
+     */
+    public function __construct(Expression $condition)
+    {
+        $this->condition = $condition;
+    }
+
+    /**
+     * Adds an else block to this condition node.
+     */
+    public function addElse(): void
+    {
+        $this->else_node = new ArrayNode();
+    }
+
+    /**
+     * Adds a child node to this condition node.
+     *
+     * @param Node $node child node to add
+     */
+    public function addChild(Node $node): void
+    {
+        if ($this->else_node) {
+            $this->else_node->addChild($node);
+        } else {
+            parent::addChild($node);
+        }
+    }
+
+    /**
+     * Returns a string representation of this node.
+     *
+     * @param Context $context symbol table
+     */
+    public function render(Context $context): string
+    {
+        if ($this->condition->value($context)) {
+            return parent::render($context);
+        }
+
+        return $this->else_node ? $this->else_node->render($context) : '';
+    }
+}