elds   = $this->checkout_fields_controller->get_fields_for_location( 'address' );

		if ( ! $fields || ! $customer ) {
			return;
		}

		foreach ( $fields as $key => $field ) {
			$value = $this->checkout_fields_controller->format_additional_field_value(
				$this->checkout_fields_controller->get_field_from_object( $key, $customer, $address_type ),
				$field
			);

			if ( ! $value ) {
				continue;
			}

			printf( '<br><strong>%s</strong>: %s', wp_kses_post( $field['label'] ), wp_kses_post( $value ) );
		}
	}

	/**
	 * Register required additional contact fields.
	 *
	 * @param array $fields Required fields.
	 * @return array
	 */
	public function edit_account_form_required_fields( $fields ) {
		$additional_fields = $this->checkout_fields_controller->get_fields_for_location( 'contact' );

		foreach ( $additional_fields as $key => $field ) {
			if ( ! empty( $field['required'] ) ) {
				$fields[ $key ] = $field['label'];
			}
		}

		return $fields;
	}

	/**
	 * Adds additional contact fields to the My Account edit account form.
	 */
	public function edit_account_form_fields() {
		$customer = new WC_Customer( get_current_user_id() );
		$fields   = $this->checkout_fields_controller->get_fields_for_location( 'contact' );

		foreach ( $fields as $key => $field ) {
			$field_key           = CheckoutFields::get_group_key( 'other' ) . $key;
			$form_field          = $field;
			$form_field['id']    = $field_key;
			$form_field['value'] = $this->checkout_fields_controller->get_field_from_object( $key, $customer, 'contact' );

			if ( 'select' === $field['type'] ) {
				$form_field['options'] = array_column( $field['options'], 'label', 'value' );
			}

			if ( 'checkbox' === $field['type'] ) {
				$form_field['checked_value']   = '1';
				$form_field['unchecked_value'] = '0';
			}

			woocommerce_form_field( $key, $form_field, wc_get_post_data_by_key( $key, $form_field['value'] ) );
		}
	}

	/**
	 * Validates and saves additional address fields to the customer object on the My Account page.
	 *
	 * Customer is not provided by this hook so we handle save here.
	 *
	 * @param integer $user_id User ID.
	 */
	public function save_account_form_fields( $user_id ) {
		// phpcs:disable WordPress.Security.NonceVerification.Missing
		$customer          = new WC_Customer( $user_id );
		$additional_fields = $this->checkout_fields_controller->get_fields_for_location( 'contact' );
		$field_values      = array();

		foreach ( array_keys( $additional_fields ) as $key ) {
			$post_key = CheckoutFields::get_group_key( 'other' ) . $key;
			if ( ! isset( $_POST[ $post_key ] ) ) {
				continue;
			}

			$field_value = $this->checkout_fields_controller->sanitize_field( $key, wc_clean( wp_unslash( $_POST[ $post_key ] ) ) );
			$validation  = $this->checkout_fields_controller->validate_field( $key, $field_value );

			if ( is_wp_error( $validation ) && $validation->has_errors() ) {
				wc_add_notice( $validation->get_error_message(), 'error' );
				continue;
			}

			$field_values[ $key ] = $field_value;
		}

		// Persist individual additional fields to customer.
		foreach ( $field_values as $key => $value ) {
			$this->checkout_fields_controller->persist_field_for_customer( $key, $value, $customer, 'other' );
		}

		// Validate all fields for this location.
		$location_validation = $this->checkout_fields_controller->validate_fields_for_location( $field_values, 'contact', 'other' );

		if ( is_wp_error( $location_validation ) && $location_validation->has_errors() ) {
			wc_add_notice( $location_validation->get_error_message(), 'error' );
		}

		// phpcs:enable WordPress.Security.NonceVerification.Missing
		$customer->save();
	}

	/**
	 * Adds additional address fields to the My Account edit address form.
	 *
	 * @param array  $address Address fields.
	 * @param string $address_type Type of address (billing or shipping).
	 * @return array Updated address fields.
	 */
	public function edit_address_fields( $address, $address_type ) {
		$customer = new WC_Customer( get_current_user_id() );
		$fields   = $this->checkout_fields_controller->get_fields_for_location( 'address' );

		foreach ( $fields as $key => $field ) {
			$field_key                      = CheckoutFields::get_group_key( $address_type ) . $key;
			$address[ $field_key ]          = $field;
			$address[ $field_key ]['value'] = $this->checkout_fields_controller->get_field_from_object( $key, $customer, $address_type );

			if ( 'select' === $field['type'] ) {
				$address[ $field_key ]['options'] = array_column( $field['options'], 'label', 'value' );
			}

			if ( 'checkbox' === $field['type'] ) {
				$address[ $field_key ]['checked_value']   = '1';
				$address[ $field_key ]['unchecked_value'] = '0';
			}
		}

		return $address;
	}

	/**
	 * For the My Account page, save address fields. This uses the Store API endpoint for saving addresses so
	 * extensibility hooks are consistent across the codebase.
	 *
	 * The caller saves the customer object if there are no errors. Nonces are checked before this method executes.
	 *
	 * @param integer     $user_id User ID.
	 * @param string      $address_type Type of address (billing or shipping).
	 * @param array       $address Address fields.
	 * @param WC_Customer $customer Customer object.
	 */
	public function save_address_fields( $user_id, $address_type, $address, $customer ) {
		// phpcs:disable WordPress.Security.NonceVerification.Missing
		$additional_fields = $this->checkout_fields_controller->get_fields_for_location( 'address' );
		$field_values      = array();

		foreach ( array_keys( $additional_fields ) as $key ) {
			$post_key = CheckoutFields::get_group_key( $address_type ) . $key;

			if ( ! isset( $_POST[ $post_key ] ) ) {
				continue;
			}

			$field_value = $this->checkout_fields_controller->sanitize_field( $key, wc_clean( wp_unslash( $_POST[ $post_key ] ) ) );
			$validation  = $this->checkout_fields_controller->validate_field( $key, $field_value );

			if ( is_wp_error( $validation ) && $validation->has_errors() ) {
				wc_add_notice( $validation->get_error_message(), 'error' );
				continue;
			}

			$field_values[ $key ] = $field_value;
		}

		// Persist individual additional fields to customer.
		foreach ( $field_values as $key => $value ) {
			$this->checkout_fields_controller->persist_field_for_customer( $key, $value, $customer, $address_type );
		}

		// Validate all fields for this location.
		$location_validation = $this->checkout_fields_controller->validate_fields_for_location( array_merge( $address, $field_values ), 'address', $address_type );

		if ( is_wp_error( $location_validation ) && $location_validation->has_errors() ) {
			wc_add_notice( $location_validation->get_error_message(), 'error' );
		}
		// phpcs:enable WordPress.Security.NonceVerification.Missing
	}
}