mediawiki-extensions-Echo/includes/iterator/MultipleIterator.php
Siebrand Mazeland 33126b69aa Update formatting
In preparation of Code Sniffer based updates.

Change-Id: Id5d43332b44a37665d57dc24ef8c432bc65b2f6a
2015-10-03 23:28:54 -04:00

69 lines
1.5 KiB
PHP

<?php
/**
* Presents a list of iterators as a single stream of results
* when wrapped with the RecursiveIteratorIterator.
*
* This differs from the SPL MultipleIterator in the following ways:
* * Does not return null for non-valid child iterators
* * implements RecursiveIterator
* * Lots less features(e.g. simple!)
*/
class EchoMultipleIterator implements RecursiveIterator {
protected $active = array();
protected $children;
protected $key = 0;
public function __construct( array $children ) {
$this->children = $children;
}
public function rewind() {
$this->active = $this->children;
$this->key = 0;
foreach ( $this->active as $key => $it ) {
$it->rewind();
if ( !$it->valid() ) {
unset( $this->active[$key] );
}
}
}
public function valid() {
return (bool)$this->active;
}
public function next() {
$this->key++;
foreach ( $this->active as $key => $it ) {
$it->next();
if ( !$it->valid() ) {
unset( $this->active[$key] );
}
}
}
public function current() {
$result = array();
foreach ( $this->active as $it ) {
$result[] = $it->current();
}
return $result;
}
public function key() {
return $this->key;
}
public function hasChildren() {
return (bool)$this->active;
}
public function getChildren() {
// The NotRecursiveIterator is used rather than a RecursiveArrayIterator
// so that nested arrays dont get recursed.
return new EchoNotRecursiveIterator( new ArrayIterator( $this->current() ) );
}
}