1 files changed, 51 insertions, 0 deletions
diff --git a/classes/IsisSubfieldIterator.php b/classes/IsisSubfieldIterator.php
new file mode 100644
index 0000000..ad1851d
--- /dev/null
+++ b/classes/IsisSubfieldIterator.php
@@ -0,0 +1,51 @@
+<?php
+
+// TODO: not working
+class IsisSubfieldIterator implements Iterator
+{
+    private $position = 0;
+    private $class;
+    private $field;
+    private $subfields;
+    private $keys;
+
+    public function __construct($class, $field)
+    {
+      $this->class     = $class;
+      $this->field     = $field;
+      $this->subfields = $class->getSubfields($field);
+      $this->keys      = array_values($this->subfields);
+      print_r($field);
+    }
+
+    function subfield()
+    {
+      return $this->subfields[$this->key()];
+    }
+
+    function rewind()
+    {
+      $this->position = 0;
+    }
+
+    function current()
+    {
+      $value = $this->class->getSubfield($this->field, $this->subfield());
+      return $this->class->explodeValue($value);
+    }
+
+    function key()
+    {
+      return $this->keys[$this->position];
+    }
+
+    function next()
+    {
+      ++$this->position;
+    }
+
+    function valid()
+    {
+      return isset($this->keys[$this->position]) && ($this->current() != null);
+    }
+}