/**
* Iterate collection and call callback method per item
* For callback method first argument always is item object
*
* @param string $callback
* @param array $args additional arguments for callback method
* @return Mage_Adminhtml_Block_Widget_Grid
*/
public function _exportIterateCollection($callback, array $args)
{
if (!is_array($this->_blcg_exportInfos)) {
return parent::_exportIterateCollection($callback, $args);
} else {
// Custom export
if (!is_null($this->_blcg_exportedCollection)) {
$originalCollection = $this->_blcg_exportedCollection;
} else {
$originalCollection = $this->getCollection();
}
if ($originalCollection->isLoaded()) {
// Should do the trick in all exceptions (if not loaded page size can be changed)
Mage::throwException(Mage::helper('customgrid')->__('This grid does not seem to be compatible with the custom export. If you wish to report this problem, please indicate this class name : "%s"', get_class($this)));
}
// 1000 up to 1.4, class var from 1.5
$exportPageSize = isset($this->_exportPageSize) ? $this->_exportPageSize : 1000;
$infos = $this->_blcg_exportInfos;
$total = isset($infos['custom_size']) ? intval($infos['custom_size']) : (isset($infos['size']) ? intval($infos['size']) : $exportPageSize);
if ($total <= 0) {
return;
}
$fromResult = isset($infos['from_result']) ? intval($infos['from_result']) : 1;
$pageSize = min($total, $exportPageSize);
$page = ceil($fromResult / $pageSize);
$pitchSize = $fromResult > 1 ? $fromResult - 1 - ($page - 1) * $pageSize : 0;
$break = false;
$count = null;
while ($break !== true) {
$collection = clone $originalCollection;
$collection->setPageSize($pageSize);
$collection->setCurPage($page);
if (!is_null($this->_blcg_typeModel)) {
$this->_blcg_typeModel->beforeGridExportLoadCollection($this, $collection);
}
$collection->load();
if (!is_null($this->_blcg_typeModel)) {
$this->_blcg_typeModel->afterGridExportLoadCollection($this, $collection);
}
if (is_null($count)) {
$count = $collection->getSize();
$total = min(max(0, $count - $fromResult + 1), $total);
if ($total == 0) {
$break = true;
continue;
}
$first = true;
$exported = 0;
}
$page++;
$i = 0;
foreach ($collection as $item) {
if ($first) {
if ($i++ < $pitchSize) {
continue;
} else {
$first = false;
}
}
if (++$exported > $total) {
$break = true;
break;
}
call_user_func_array(array($this, $callback), array_merge(array($item), $args));
}
}
}
}
