eventespresso / event-espresso-core

	 * @param EE_Transaction $transaction

	 * @return \EE_Line_Item of type total

	 */

	public static function create_total_line_item( $transaction = NULL ){

		$total_line_item = EE_Line_Item::new_instance( array(

			'LIN_code'	=> 'total',

			'LIN_name'	=> __('Grand Total', 'event_espresso'),

			'LIN_type'	=> EEM_Line_Item::type_total,

			'OBJ_type'	=>'Transaction'

		));

		$total_line_item = apply_filters(

			'FHEE__EEH_Line_Item__create_total_line_item__total_line_item',

			$total_line_item

		);

		self::set_TXN_ID( $total_line_item, $transaction );

		self::create_pre_tax_subtotal( $total_line_item, $transaction );

		self::create_taxes_subtotal( $total_line_item, $transaction );

		return $total_line_item;

	}

	 * @param EE_Transaction $transaction

	 * @return EE_Line_Item

	 */

	protected static function create_pre_tax_subtotal( EE_Line_Item $total_line_item, $transaction = NULL ){

		$pre_tax_line_item = EE_Line_Item::new_instance( array(

			'LIN_code' 	=> 'pre-tax-subtotal',

			'LIN_name' 	=> __( 'Pre-Tax Subtotal', 'event_espresso' ),

			'LIN_type' 	=> EEM_Line_Item::type_sub_total

		) );

		$pre_tax_line_item = apply_filters(

			'FHEE__EEH_Line_Item__create_pre_tax_subtotal__pre_tax_line_item',

			$pre_tax_line_item

		);

		self::set_TXN_ID( $pre_tax_line_item, $transaction );

		$total_line_item->add_child_line_item( $pre_tax_line_item );

		self::create_event_subtotal( $pre_tax_line_item, $transaction );

		return $pre_tax_line_item;

	}

	 * @param EE_Transaction $transaction

	 * @return EE_Line_Item

	 */

	protected static function create_taxes_subtotal( EE_Line_Item $total_line_item, $transaction = NULL ){

		$tax_line_item = EE_Line_Item::new_instance(array(

			'LIN_code'	=> 'taxes',

			'LIN_name' 	=> __('Taxes', 'event_espresso'),

			'LIN_type'	=> EEM_Line_Item::type_tax_sub_total,

			'LIN_order' => 1000,//this should always come last

		));

		$tax_line_item = apply_filters(

			'FHEE__EEH_Line_Item__create_taxes_subtotal__tax_line_item',

			$tax_line_item

		);

		self::set_TXN_ID( $tax_line_item, $transaction );

		$total_line_item->add_child_line_item( $tax_line_item );

		//and lastly, add the actual taxes

		self::apply_taxes( $total_line_item );

		return $tax_line_item;

	}