Add Accept Terms Field

/**

 * Add a Terms and Conditions donation field, showing

 * whether the donor accepted terms and conditions when

 * they donated.

 */

add_action(

	'init',

	function() {

		/* Create the `Charitable_Donation_Field` object. */

		$field = new Charitable_Donation_Field(

			'accept_terms',

			array(

				'label'          => __( 'Terms and Conditions Accepted' ),

				'data_type'      => 'meta',

				'donation_form'  => false,

				'admin_form'     => false,

				'show_in_meta'   => true,

				'show_in_export' => true,

				'email_tag'      => array(

					'description' => __( 'Whether the terms and conditions were accepted.' ),

				),

				'value_callback' => function( Charitable_Abstract_Donation $donation, $key ) {

					$parent_id = $donation->get_donation_plan_id();

					if ( $parent_id ) {

						$accepted = get_post_meta( $parent_id, 'accept_terms', true );

					} else {

						$accepted = get_post_meta( $donation->ID, 'accept_terms', true );

					}

					return $accepted ? __( 'Yes' ) : __( 'No' );

				},

			)

		);

		/* Get the `Charitable_Donation_Field_Registry` instance. */

		$fields = charitable()->donation_fields();

		/* Add the new field. */

		$fields->register_field( $field );

	}

);