public function generate_image($type, $filter_chain)
{
try {
$original = new midcom_db_attachment($this->attachment);
} catch (midcom_error $e) {
$e->log();
return false;
}
$found_derived = false;
try {
$derived = new midcom_db_attachment($this->{$type});
$found_derived = true;
} catch (midcom_error $e) {
$derived = new midcom_db_attachment();
$derived->parentguid = $original->parentguid;
$derived->title = $original->title;
$derived->mimetype = $original->mimetype;
$derived->name = $type . '_' . $original->name;
}
$imagefilter = new midcom_helper_imagefilter($original);
if (!$imagefilter->process_chain($filter_chain)) {
throw new midcom_error('Image processing failed');
}
if (!$found_derived) {
if (!$derived->create()) {
throw new midcom_error('Failed to create derived image: ' . midcom_connection::get_error_string());
}
$this->{$type} = $derived->id;
$this->update();
}
return $imagefilter->write($derived);
}
/**
* Saves the main image to the type, doing transformation work if configured to do so.
*
* @return boolean Indicating success.
*/
function _save_main_image()
{
$this->_current_tmpname = $this->_filter->create_tmp_copy($this->_original_tmpname);
if (!$this->_filter->set_file($this->_current_tmpname)) {
return false;
}
if (isset($this->_identifier)) {
// we come from the image*s* type
$blob_identifier = "{$this->_identifier}main";
$title = $this->_title;
} else {
$blob_identifier = 'main';
$title = $this->title;
}
$result = true;
// Filter if necessary.
if ($this->filter_chain && !$this->_filter->process_chain($this->filter_chain)) {
$result = false;
}
if ($result) {
if (array_key_exists('main', $this->_pending_attachments)) {
unset($this->_pending_attachments['main']);
$result = $this->update_attachment($blob_identifier, $this->_filename, $title, $this->_target_mimetype, $this->_current_tmpname, false);
} else {
$this->delete_attachment($blob_identifier);
if (isset($this->_attachment_map)) {
$this->_attachment_map[$blob_identifier] = array($this->_identifier, 'main');
}
$result = $this->add_attachment($blob_identifier, $this->_filename, $title, $this->_target_mimetype, $this->_current_tmpname, false);
}
}
@unlink($this->_current_tmpname);
return $result;
}
