eventespresso / event-espresso-core

	 * @return void

	 * @throws \EE_Error

	 */

	public static function increment_quantity( EE_Line_Item $line_item, $qty = 1 ) {

		if( ! $line_item->is_percent() ) {

			$qty += $line_item->quantity();

			$line_item->set_quantity( $qty );

			$line_item->set_total( $line_item->unit_price() * $qty );

			$line_item->save();

		}

		foreach( $line_item->children() as $child ) {

			if( $child->is_sub_line_item() ) {

				EEH_Line_Item::update_quantity( $child, $qty );

			}

		}

	}

	 * @param int          $new_quantity

	 * @throws \EE_Error

	 */

	public static function update_quantity( EE_Line_Item $line_item, $new_quantity ) {

		if( ! $line_item->is_percent() ) {

			$line_item->set_quantity( $new_quantity );

			$line_item->set_total( $line_item->unit_price() * $new_quantity );

			$line_item->save();

		}

		foreach( $line_item->children() as $child ) {

			if( $child->is_sub_line_item() ) {

				EEH_Line_Item::update_quantity( $child, $new_quantity );

			}

		}

	}