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$this->db->query("INSERT INTO `" . DB_PREFIX . "custom_field` SET type = '" . $this->db->escape($data['type']) . "', value = '" . $this->db->escape($data['value']) . "', required = '" . (int)$data['required'] . "', location = '" . $this->db->escape($data['location']) . "', position = '" . $this->db->escape($data['position']) . "', sort_order = '" . (int)$data['sort_order'] . "'");

$custom_field_id = $this->db->getLastId();

foreach ($data['custom_field_description'] as $language_id => $value) {
	$this->db->query("INSERT INTO " . DB_PREFIX . "custom_field_description SET custom_field_id = '" . (int)$custom_field_id . "', language_id = '" . (int)$language_id . "', name = '" . $this->db->escape($value['name']) . "'");
}

if (isset($data['custom_field_value'])) {
	foreach ($data['custom_field_value'] as $custom_field_value) {
		$this->db->query("INSERT INTO " . DB_PREFIX . "custom_field_value SET custom_field_id = '" . (int)$custom_field_id . "', sort_order = '" . (int)$custom_field_value['sort_order'] . "'");

		$custom_field_value_id = $this->db->getLastId();

		foreach ($custom_field_value['custom_field_value_description'] as $language_id => $custom_field_value_description) {
			$this->db->query("INSERT INTO " . DB_PREFIX . "custom_field_value_description SET custom_field_value_id = '" . (int)$custom_field_value_id . "', language_id = '" . (int)$language_id . "', custom_field_id = '" . (int)$custom_field_id . "', name = '" . $this->db->escape($custom_field_value_description['name']) . "'");
		}
	}
}

$this->db->query("UPDATE `" . DB_PREFIX . "custom_field` SET type = '" . $this->db->escape($data['type']) . "', value = '" . $this->db->escape($data['value']) . "', required = '" . (int)$data['required'] . "', location = '" . $this->db->escape($data['location']) . "', position = '" . $this->db->escape($data['position']) . "', sort_order = '" . (int)$data['sort_order'] . "' WHERE custom_field_id = '" . (int)$custom_field_id . "'");

$this->db->query("DELETE FROM " . DB_PREFIX . "custom_field_description WHERE custom_field_id = '" . (int)$custom_field_id . "'");

foreach ($data['custom_field_description'] as $language_id => $value) {
	$this->db->query("INSERT INTO " . DB_PREFIX . "custom_field_description SET custom_field_id = '" . (int)$custom_field_id . "', language_id = '" . (int)$language_id . "', name = '" . $this->db->escape($value['name']) . "'");
}

$this->db->query("DELETE FROM " . DB_PREFIX . "custom_field_value WHERE custom_field_id = '" . (int)$custom_field_id . "'");
$this->db->query("DELETE FROM " . DB_PREFIX . "custom_field_value_description WHERE custom_field_id = '" . (int)$custom_field_id . "'");

if (isset($data['custom_field_value'])) {
	foreach ($data['custom_field_value'] as $custom_field_value) {
		if ($custom_field_value['custom_field_value_id']) {
			$this->db->query("INSERT INTO " . DB_PREFIX . "custom_field_value SET custom_field_value_id = '" . (int)$custom_field_value['custom_field_value_id'] . "', custom_field_id = '" . (int)$custom_field_id . "', sort_order = '" . (int)$custom_field_value['sort_order'] . "'");
		} else {
			$this->db->query("INSERT INTO " . DB_PREFIX . "custom_field_value SET custom_field_id = '" . (int)$custom_field_id . "', sort_order = '" . (int)$custom_field_value['sort_order'] . "'");
		}

		$custom_field_value_id = $this->db->getLastId();

		foreach ($custom_field_value['custom_field_value_description'] as $language_id => $custom_field_value_description) {
			$this->db->query("INSERT INTO " . DB_PREFIX . "custom_field_value_description SET custom_field_value_id = '" . (int)$custom_field_value_id . "', language_id = '" . (int)$language_id . "', custom_field_id = '" . (int)$custom_field_id . "', name = '" . $this->db->escape($custom_field_value_description['name']) . "'");
		}
	}
}

$this->db->query("DELETE FROM `" . DB_PREFIX . "custom_field` WHERE custom_field_id = '" . (int)$custom_field_id . "'");
$this->db->query("DELETE FROM `" . DB_PREFIX . "custom_field_description` WHERE custom_field_id = '" . (int)$custom_field_id . "'");	
$this->db->query("DELETE FROM `" . DB_PREFIX . "custom_field_value` WHERE custom_field_id = '" . (int)$custom_field_id . "'");
$this->db->query("DELETE FROM `" . DB_PREFIX . "custom_field_value_description` WHERE custom_field_id = '" . (int)$custom_field_id . "'");

$query = $this->db->query("SELECT * FROM `" . DB_PREFIX . "custom_field` cf LEFT JOIN " . DB_PREFIX . "custom_field_description cfd ON (cf.custom_field_id = cfd.custom_field_id) WHERE cf.custom_field_id = '" . (int)$custom_field_id . "' AND cfd.language_id = '" . (int)$this->config->get('config_language_id') . "'");

return $query->row;

$sql = "SELECT * FROM `" . DB_PREFIX . "custom_field` cf LEFT JOIN " . DB_PREFIX . "custom_field_description cfd ON (cf.custom_field_id = cfd.custom_field_id) WHERE cfd.language_id = '" . (int)$this->config->get('config_language_id') . "'";

if (isset($data['filter_name']) && !is_null($data['filter_name'])) {
	$sql .= " AND cfd.name LIKE '" . $this->db->escape($data['filter_name']) . "%'";
}

$sort_data = array(
	'cfd.name',
	'cf.type',
	'cf.location',
	'cf.sort_order'
);	

if (isset($data['sort']) && in_array($data['sort'], $sort_data)) {
	$sql .= " ORDER BY " . $data['sort'];	
} else {
	$sql .= " ORDER BY cfd.name";	
}

if (isset($data['order']) && ($data['order'] == 'DESC')) {
	$sql .= " DESC";
} else {
	$sql .= " ASC";
}

if (isset($data['start']) || isset($data['limit'])) {
	if ($data['start'] < 0) {
		$data['start'] = 0;
	}					

	if ($data['limit'] < 1) {
		$data['limit'] = 20;
	}	

	$sql .= " LIMIT " . (int)$data['start'] . "," . (int)$data['limit'];
}	

$query = $this->db->query($sql);

return $query->rows;

$custom_field_data = array();

$query = $this->db->query("SELECT * FROM " . DB_PREFIX . "custom_field_description WHERE custom_field_id = '" . (int)$custom_field_id . "'");

foreach ($query->rows as $result) {
	$custom_field_data[$result['language_id']] = array('name' => $result['name']);
}

return $custom_field_data;

$query = $this->db->query("SELECT * FROM " . DB_PREFIX . "custom_field_value cfv LEFT JOIN " . DB_PREFIX . "custom_field_value_description cfvd ON (cfv.custom_field_value_id = cfvd.custom_field_value_id) WHERE cfv.custom_field_value_id = '" . (int)$custom_field_value_id . "' AND cfvd.language_id = '" . (int)$this->config->get('config_language_id') . "'");

return $query->row;

$custom_field_value_data = array();

$custom_field_value_query = $this->db->query("SELECT * FROM " . DB_PREFIX . "custom_field_value cfv LEFT JOIN " . DB_PREFIX . "custom_field_value_description cfvd ON (cfv.custom_field_value_id = cfvd.custom_field_value_id) WHERE cfv.custom_field_id = '" . (int)$custom_field_id . "' AND cfvd.language_id = '" . (int)$this->config->get('config_language_id') . "' ORDER BY cfv.sort_order ASC");

foreach ($custom_field_value_query->rows as $custom_field_value) {
	$custom_field_value_data[] = array(
		'custom_field_value_id' => $custom_field_value['custom_field_value_id'],
		'name'                  => $custom_field_value['name'],
		'sort_order'            => $custom_field_value['sort_order']
	);
}

return $custom_field_value_data;

$custom_field_value_data = array();

$custom_field_value_query = $this->db->query("SELECT * FROM " . DB_PREFIX . "custom_field_value WHERE custom_field_id = '" . (int)$custom_field_id . "'");

foreach ($custom_field_value_query->rows as $custom_field_value) {
	$custom_field_value_description_data = array();

	$custom_field_value_description_query = $this->db->query("SELECT * FROM " . DB_PREFIX . "custom_field_value_description WHERE custom_field_value_id = '" . (int)$custom_field_value['custom_field_value_id'] . "'");			

	foreach ($custom_field_value_description_query->rows as $custom_field_value_description) {
		$custom_field_value_description_data[$custom_field_value_description['language_id']] = array('name' => $custom_field_value_description['name']);
	}

	$custom_field_value_data[] = array(
		'custom_field_value_id'          => $custom_field_value['custom_field_value_id'],
		'custom_field_value_description' => $custom_field_value_description_data,
		'sort_order'                     => $custom_field_value['sort_order']
	);
}

return $custom_field_value_data;

$query = $this->db->query("SELECT COUNT(*) AS total FROM `" . DB_PREFIX . "custom_field`");

return $query->row['total'];