1 files changed, 55 insertions, 0 deletions
diff --git a/lib/exTpl/IteratorNode.php b/lib/exTpl/IteratorNode.php
new file mode 100644
index 0000000..58dd593
--- /dev/null
+++ b/lib/exTpl/IteratorNode.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace exTpl;
+
+/**
+ * IteratorNode represents a single iterator tag:
+ * "{foreach ARRAY [as [KEY =>] VALUE]}...{endforeach}".
+ */
+class IteratorNode extends ArrayNode
+{
+    protected Expression $expr;
+    protected string $key_name;
+    protected string $val_name;
+
+    /**
+     * Initializes a new Node instance with the given expression.
+     *
+     * @param Expression $expr expression object
+     * @param string $key_name name of variable on each iteration
+     * @param string $val_name name of variable on each iteration
+     */
+    public function __construct(Expression $expr, string $key_name, string $val_name)
+    {
+        $this->expr     = $expr;
+        $this->key_name = $key_name;
+        $this->val_name = $val_name;
+    }
+
+    /**
+     * Returns a string representation of this node. The IteratorNode
+     * renders the node sequence for each value in the expression list.
+     *
+     * @param Context $context symbol table
+     */
+    public function render(Context $context): string
+    {
+        $values = $this->expr->value($context);
+        $result = '';
+
+        if (is_array($values) && is_int(key($values))) {
+            $bindings = [$this->key_name => &$key, $this->val_name => &$value];
+            $context  = new Context($bindings, $context);
+
+            foreach ($values as $key => $value) {
+                $result .= parent::render(new Context($value, $context));
+            }
+        } else if (is_array($values) && count($values)) {
+            return parent::render(new Context($values, $context));
+        } else if ($values) {
+            return parent::render($context);
+        }
+
+        return $result;
+    }
+}