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<?php
/**
* Isis subfield iterator.
*
* @todo
* It's not working.
*/
class IsisSubfieldIterator implements Iterator
{
private $position = 0;
private $class;
private $field;
private $subfields;
private $keys;
/**
* Constructor.
*
* @param $class
* Instance of IsisConnector or child class.
*
* @param $field
* Field to iterate over.
*/
public function __construct($class, $field) {
$this->class = $class;
$this->field = $field;
$this->subfields = $class->getSubfields($field);
$this->keys = array_values($this->subfields);
$this->total = count($this->class->result[$field['name']);
}
/**
* Get the current subfield.
*/
function subfield() {
return $this->subfields[$this->key()];
}
/**
* Rewind the Iterator to the first element.
*/
function rewind() {
$this->position = 0;
}
/**
* Return the current element.
*/
function current() {
$value = $this->class->getSubfield($this->field, $this->subfield());
return $this->class->explodeValue($value);
}
/**
* Return the key of the current element.
*/
function key() {
return $this->keys[$this->position];
}
/**
* Move forward to next element.
*/
function next() {
++$this->position;
}
/**
* Check if there is a current element after calls to rewind() or next().
*/
function valid() {
return isset($this->keys[$this->position]) && ($this->current() != null);
}
}
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