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LoopResolver.php
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LoopResolver.php
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<?php
namespace Kaliop\eZMigrationBundle\Core\ReferenceResolver;
class LoopResolver extends AbstractResolver
{
protected $referencePrefixes = array('loop:');
protected $stack = array();
public function beginLoop()
{
$this->stack[] = 0;
}
public function endLoop()
{
array_pop($this->stack);
}
public function loopStep()
{
$idx = count($this->stack) - 1;
$this->stack[$idx] = $this->stack[$idx] + 1;
}
/**
* @param string $identifier format: 'loop:index', 'loop:depth'
* @return int
* @throws \Exception When trying to retrieve anything else but index and depth
*/
public function getReferenceValue($identifier)
{
switch(substr($identifier, 5)) {
case 'iteration':
return end($this->stack);
case 'depth':
return count($this->stack);
default:
throw new \Exception("Can not resolve loop value '$identifier'");
}
}
}