<?php

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Name text field.
 *
 * @since 1.0.0
 */
class WPForms_Field_Name extends WPForms_Field {

	/**
	 * Primary class constructor.
	 *
	 * @since 1.0.0
	 */
	public function init() {

		// Define field type information.
		$this->name     = esc_html__( 'Name', 'wpforms-lite' );
		$this->keywords = esc_html__( 'user, first, last', 'wpforms-lite' );
		$this->type     = 'name';
		$this->icon     = 'fa-user';
		$this->order    = 150;

		$this->hooks();
	}

	/**
	 * Hooks.
	 *
	 * @since 1.8.1
	 */
	private function hooks() {

		// Define additional field properties.
		add_filter( 'wpforms_field_properties_name', [ $this, 'field_properties' ], 5, 3 );

		// Set field to default to required.
		add_filter( 'wpforms_field_new_required', [ $this, 'default_required' ], 10, 2 );

		// This field requires fieldset+legend instead of the field label.
		add_filter( "wpforms_frontend_modern_is_field_requires_fieldset_{$this->type}", [ $this, 'is_field_requires_fieldset' ], PHP_INT_MAX, 2 );
	}

	/**
	 * Define additional field properties.
	 *
	 * @since 1.3.7
	 *
	 * @param array $properties Field properties.
	 * @param array $field      Field data and settings.
	 * @param array $form_data  Form data and settings.
	 *
	 * @return array
	 */
	public function field_properties( $properties, $field, $form_data ) {

		$format = ! empty( $field['format'] ) ? esc_attr( $field['format'] ) : 'first-last';

		// Simple format.
		if ( 'simple' === $format ) {
			$properties['inputs']['primary']['attr']['placeholder'] = ! empty( $field['simple_placeholder'] ) ? $field['simple_placeholder'] : '';
			$properties['inputs']['primary']['attr']['value']       = ! empty( $field['simple_default'] ) ? wpforms_process_smart_tags( $field['simple_default'], $form_data ) : '';

			return $properties;
		}

		// Expanded formats.
		// Remove primary for expanded formats since we have first, middle, last.
		unset( $properties['inputs']['primary'] );

		$form_id  = absint( $form_data['id'] );
		$field_id = absint( $field['id'] );

		$props = [
			'inputs' => [
				'first'  => [
					'attr'     => [
						'name'        => "wpforms[fields][{$field_id}][first]",
						'value'       => ! empty( $field['first_default'] ) ? wpforms_process_smart_tags( $field['first_default'], $form_data ) : '',
						'placeholder' => ! empty( $field['first_placeholder'] ) ? $field['first_placeholder'] : '',
					],
					'block'    => [
						'wpforms-field-row-block',
						'wpforms-first',
					],
					'class'    => [
						'wpforms-field-name-first',
					],
					'data'     => [],
					'id'       => "wpforms-{$form_id}-field_{$field_id}",
					'required' => ! empty( $field['required'] ) ? 'required' : '',
					'sublabel' => [
						'hidden' => ! empty( $field['sublabel_hide'] ),
						'value'  => esc_html__( 'First', 'wpforms-lite' ),
					],
				],
				'middle' => [
					'attr'     => [
						'name'        => "wpforms[fields][{$field_id}][middle]",
						'value'       => ! empty( $field['middle_default'] ) ? wpforms_process_smart_tags( $field['middle_default'], $form_data ) : '',
						'placeholder' => ! empty( $field['middle_placeholder'] ) ? $field['middle_placeholder'] : '',
					],
					'block'    => [
						'wpforms-field-row-block',
						'wpforms-one-fifth',
					],
					'class'    => [
						'wpforms-field-name-middle',
					],
					'data'     => [],
					'id'       => "wpforms-{$form_id}-field_{$field_id}-middle",
					'required' => '',
					'sublabel' => [
						'hidden' => ! empty( $field['sublabel_hide'] ),
						'value'  => esc_html__( 'Middle', 'wpforms-lite' ),
					],
				],
				'last'   => [
					'attr'     => [
						'name'        => "wpforms[fields][{$field_id}][last]",
						'value'       => ! empty( $field['last_default'] ) ? wpforms_process_smart_tags( $field['last_default'], $form_data ) : '',
						'placeholder' => ! empty( $field['last_placeholder'] ) ? $field['last_placeholder'] : '',
					],
					'block'    => [
						'wpforms-field-row-block',

					],
					'class'    => [
						'wpforms-field-name-last',
					],
					'data'     => [],
					'id'       => "wpforms-{$form_id}-field_{$field_id}-last",
					'required' => ! empty( $field['required'] ) ? 'required' : '',
					'sublabel' => [
						'hidden' => ! empty( $field['sublabel_hide'] ),
						'value'  => esc_html__( 'Last', 'wpforms-lite' ),
					],
				],
			],
		];

		$properties = array_merge_recursive( $properties, $props );

		$has_common_error = ! empty( $properties['error']['value'] ) && is_string( $properties['error']['value'] );

		// Input First: add error class if needed.
		if ( ! empty( $properties['error']['value']['first'] ) || $has_common_error ) {
			$properties['inputs']['first']['class'][] = 'wpforms-error';
		}

		// Input First: add required class if needed.
		if ( ! empty( $field['required'] ) ) {
			$properties['inputs']['first']['class'][] = 'wpforms-field-required';
		}

		// Input First: add column class.
		$properties['inputs']['first']['block'][] = 'first-last' === $format ? 'wpforms-one-half' : 'wpforms-two-fifths';

		// Input Middle: add error class if needed.
		if ( $has_common_error ) {
			$properties['inputs']['middle']['class'][] = 'wpforms-error';
		}

		// Input Last: add error class if needed.
		if ( ! empty( $properties['error']['value']['last'] ) || $has_common_error ) {
			$properties['inputs']['last']['class'][] = 'wpforms-error';
		}

		// Input Last: add required class if needed.
		if ( ! empty( $field['required'] ) ) {
			$properties['inputs']['last']['class'][] = 'wpforms-field-required';
		}

		// Input Last: add column class.
		$properties['inputs']['last']['block'][] = 'first-last' === $format ? 'wpforms-one-half' : 'wpforms-two-fifths';

		return $properties;
	}

	/**
	 * Name fields should default to being required.
	 *
	 * @since 1.0.8
	 *
	 * @param bool  $required
	 * @param array $field
	 *
	 * @return bool
	 */
	public function default_required( $required, $field ) {

		if ( 'name' === $field['type'] ) {
			return true;
		}
		return $required;
	}

	/**
	 * Field options panel inside the builder.
	 *
	 * @since 1.0.0
	 *
	 * @param array $field
	 */
	public function field_options( $field ) {

		// Define data.
		$format = ! empty( $field['format'] ) ? esc_attr( $field['format'] ) : 'first-last';

		/*
		 * Basic field options.
		 */

		// Options open markup.
		$args = [
			'markup' => 'open',
		];

		$this->field_option( 'basic-options', $field, $args );

		// Label.
		$this->field_option( 'label', $field );

		// Format.
		$lbl = $this->field_element(
			'label',
			$field,
			[
				'slug'    => 'format',
				'value'   => esc_html__( 'Format', 'wpforms-lite' ),
				'tooltip' => esc_html__( 'Select format to use for the name form field', 'wpforms-lite' ),
			],
			false
		);

		$fld = $this->field_element(
			'select',
			$field,
			[
				'slug'    => 'format',
				'value'   => $format,
				'options' => [
					'simple'            => esc_html__( 'Simple', 'wpforms-lite' ),
					'first-last'        => esc_html__( 'First Last', 'wpforms-lite' ),
					'first-middle-last' => esc_html__( 'First Middle Last', 'wpforms-lite' ),
				],
			],
			false
		);

		$args = [
			'slug'    => 'format',
			'content' => $lbl . $fld,
		];

		$this->field_element( 'row', $field, $args );

		// Description.
		$this->field_option( 'description', $field );

		// Required toggle.
		$this->field_option( 'required', $field );

		// Options close markup.
		$args = [
			'markup' => 'close',
		];

		$this->field_option( 'basic-options', $field, $args );

		/*
		 * Advanced field options.
		 */

		// Options open markup.
		$args = [
			'markup' => 'open',
		];

		$this->field_option( 'advanced-options', $field, $args );

		// Size.
		$this->field_option( 'size', $field );

		echo '<div class="format-selected-' . $format . ' format-selected">';

			// Simple.
			$simple_placeholder = ! empty( $field['simple_placeholder'] ) ? esc_attr( $field['simple_placeholder'] ) : '';
			$simple_default     = ! empty( $field['simple_default'] ) ? esc_attr( $field['simple_default'] ) : '';
			printf( '<div class="wpforms-clear wpforms-field-option-row wpforms-field-option-row-simple" id="wpforms-field-option-row-%d-simple" data-subfield="simple" data-field-id="%d">', $field['id'], $field['id'] );
				$this->field_element( 'label', $field, [ 'slug' => 'simple_placeholder', 'value' => esc_html__( 'Name', 'wpforms-lite' ), 'tooltip' => esc_html__( 'Name field advanced options.', 'wpforms-lite' ) ] );
				echo '<div class="wpforms-field-options-columns-2 wpforms-field-options-columns">';
					echo '<div class="placeholder wpforms-field-options-column">';
						printf( '<input type="text" class="placeholder" id="wpforms-field-option-%d-simple_placeholder" name="fields[%d][simple_placeholder]" value="%s">', (int) $field['id'], (int) $field['id'], esc_attr( $simple_placeholder ) );
						printf( '<label for="wpforms-field-option-%d-simple_placeholder" class="sub-label">%s</label>', (int) $field['id'], esc_html__( 'Placeholder', 'wpforms-lite' ) );
					echo '</div>';
					echo '<div class="default wpforms-field-options-column">';
						printf( '<input type="text" class="default" id="wpforms-field-option-%d-simple_default" name="fields[%d][simple_default]" value="%s">', (int) $field['id'], (int) $field['id'], esc_attr( $simple_default ) );
						printf( '<label for="wpforms-field-option-%d-simple_default" class="sub-label">%s</label>', (int) $field['id'], esc_html__( 'Default Value', 'wpforms-lite' ) );
					echo '</div>';
				echo '</div>';
			echo '</div>';

			// First.
			$first_placeholder = ! empty( $field['first_placeholder'] ) ? esc_attr( $field['first_placeholder'] ) : '';
			$first_default     = ! empty( $field['first_default'] ) ? esc_attr( $field['first_default'] ) : '';
			printf( '<div class="wpforms-clear wpforms-field-option-row wpforms-field-option-row-first" id="wpforms-field-option-row-%d-first" data-subfield="first-name" data-field-id="%d">', $field['id'], $field['id'] );
				$this->field_element( 'label', $field, [ 'slug' => 'first_placeholder', 'value' => esc_html__( 'First Name', 'wpforms-lite' ), 'tooltip' => esc_html__( 'First name field advanced options.', 'wpforms-lite' ) ] );
				echo '<div class="wpforms-field-options-columns-2 wpforms-field-options-columns">';
					echo '<div class="placeholder wpforms-field-options-column">';
						printf( '<input type="text" class="placeholder" id="wpforms-field-option-%1$d-first_placeholder" name="fields[%1$d][first_placeholder]" value="%2$s">', (int) $field['id'], esc_attr( $first_placeholder ) );
						printf( '<label for="wpforms-field-option-%d-first_placeholder" class="sub-label">%s</label>', (int) $field['id'], esc_html__( 'Placeholder', 'wpforms-lite' ) );
					echo '</div>';
					echo '<div class="default wpforms-field-options-column">';
						printf( '<input type="text" class="default" id="wpforms-field-option-%1$d-first_default" name="fields[%1$d][first_default]" value="%2$s">', (int) $field['id'], esc_attr( $first_default ) );
						printf( '<label for="wpforms-field-option-%d-first_default" class="sub-label">%s</label>', (int) $field['id'], esc_html__( 'Default Value', 'wpforms-lite' ) );
					echo '</div>';
				echo '</div>';
			echo '</div>';

			// Middle.
			$middle_placeholder = ! empty( $field['middle_placeholder'] ) ? esc_attr( $field['middle_placeholder'] ) : '';
			$middle_default     = ! empty( $field['middle_default'] ) ? esc_attr( $field['middle_default'] ) : '';
			printf( '<div class="wpforms-clear wpforms-field-option-row wpforms-field-option-row-middle" id="wpforms-field-option-row-%d-middle" data-subfield="middle-name" data-field-id="%d">', $field['id'], $field['id'] );
				$this->field_element( 'label', $field, [ 'slug' => 'middle_placeholder', 'value' => esc_html__( 'Middle Name', 'wpforms-lite' ), 'tooltip' => esc_html__( 'Middle name field advanced options.', 'wpforms-lite' ) ] );
				echo '<div class="wpforms-field-options-columns-2 wpforms-field-options-columns">';
					echo '<div class="placeholder wpforms-field-options-column">';
						printf( '<input type="text" class="placeholder" id="wpforms-field-option-%1$d-middle_placeholder" name="fields[%1$d][middle_placeholder]" value="%2$s">', (int) $field['id'], esc_attr( $middle_placeholder ) );
						printf( '<label for="wpforms-field-option-%d-middle_placeholder" class="sub-label">%s</label>', (int) $field['id'], esc_html__( 'Placeholder', 'wpforms-lite' ) );
					echo '</div>';
					echo '<div class="default wpforms-field-options-column">';
						printf( '<input type="text" class="default" id="wpforms-field-option-%1$d-middle_default" name="fields[%1$d][middle_default]" value="%2$s">', (int) $field['id'], esc_attr( $middle_default ) );
						printf( '<label for="wpforms-field-option-%d-middle_default" class="sub-label">%s</label>', (int) $field['id'], esc_html__( 'Default Value', 'wpforms-lite' ) );
					echo '</div>';
				echo '</div>';
			echo '</div>';

			// Last.
			$last_placeholder = ! empty( $field['last_placeholder'] ) ? esc_attr( $field['last_placeholder'] ) : '';
			$last_default     = ! empty( $field['last_default'] ) ? esc_attr( $field['last_default'] ) : '';
			printf( '<div class="wpforms-clear wpforms-field-option-row wpforms-field-option-row-last" id="wpforms-field-option-row-%d-last" data-subfield="last-name" data-field-id="%d">', $field['id'], $field['id'] );
				$this->field_element( 'label', $field, [ 'slug' => 'last_placeholder', 'value' => esc_html__( 'Last Name', 'wpforms-lite' ), 'tooltip' => esc_html__( 'Last name field advanced options.', 'wpforms-lite' ) ] );
				echo '<div class="wpforms-field-options-columns-2 wpforms-field-options-columns">';
					echo '<div class="placeholder wpforms-field-options-column">';
						printf( '<input type="text" class="placeholder" id="wpforms-field-option-%1$d-last_placeholder" name="fields[%1$d][last_placeholder]" value="%2$s">', (int) $field['id'], esc_attr( $last_placeholder ) );
						printf( '<label for="wpforms-field-option-%d-last_placeholder" class="sub-label">%s</label>', (int) $field['id'], esc_html__( 'Placeholder', 'wpforms-lite' ) );
					echo '</div>';
					echo '<div class="default wpforms-field-options-column">';
						printf( '<input type="text" class="default" id="wpforms-field-option-%1$d-last_default" name="fields[%1$d][last_default]" value="%2$s">', (int) $field['id'], esc_attr( $last_default ) );
						printf( '<label for="wpforms-field-option-%d-last_default" class="sub-label">%s</label>', (int) $field['id'], esc_html__( 'Default Value', 'wpforms-lite' ) );
					echo '</div>';
				echo '</div>';
			echo '</div>';

		echo '</div>';

		// Custom CSS classes.
		$this->field_option( 'css', $field );

		// Hide Label.
		$this->field_option( 'label_hide', $field );

		// Hide sublabels.
		$sublabel_class = isset( $field['format'] ) && ! in_array( $field['format'], [ 'first-last', 'first-middle-last' ], true ) ? 'wpforms-hidden' : '';

		$this->field_option( 'sublabel_hide', $field, [ 'class' => $sublabel_class ] );

		// Options close markup.
		$args = [
			'markup' => 'close',
		];

		$this->field_option( 'advanced-options', $field, $args );
	}

	/**
	 * Field preview inside the builder.
	 *
	 * @since 1.0.0
	 *
	 * @param array $field Field information.
	 */
	public function field_preview( $field ) {

		// Define data.
		$simple_placeholder = ! empty( $field['simple_placeholder'] ) ? $field['simple_placeholder'] : '';
		$first_placeholder  = ! empty( $field['first_placeholder'] ) ? $field['first_placeholder'] : '';
		$middle_placeholder = ! empty( $field['middle_placeholder'] ) ? $field['middle_placeholder'] : '';
		$last_placeholder   = ! empty( $field['last_placeholder'] ) ? $field['last_placeholder'] : '';
		$simple_default     = ! empty( $field['simple_default'] ) ? $field['simple_default'] : '';
		$first_default      = ! empty( $field['first_default'] ) ? $field['first_default'] : '';
		$middle_default     = ! empty( $field['middle_default'] ) ? $field['middle_default'] : '';
		$last_default       = ! empty( $field['last_default'] ) ? $field['last_default'] : '';
		$format             = ! empty( $field['format'] ) ? $field['format'] : 'first-last';

		// Label.
		$this->field_preview_option( 'label', $field );
		?>

		<div class="format-selected-<?php echo sanitize_html_class( $format ); ?> format-selected wpforms-clear">

			<div class="wpforms-simple">
				<input type="text" placeholder="<?php echo esc_attr( $simple_placeholder ); ?>" value="<?php echo esc_attr( $simple_default ); ?>" class="primary-input" readonly>
			</div>

			<div class="wpforms-first-name">
				<input type="text" placeholder="<?php echo esc_attr( $first_placeholder ); ?>" value="<?php echo esc_attr( $first_default ); ?>" class="primary-input" readonly>
				<label class="wpforms-sub-label"><?php esc_html_e( 'First', 'wpforms-lite' ); ?></label>
			</div>

			<div class="wpforms-middle-name">
				<input type="text" placeholder="<?php echo esc_attr( $middle_placeholder ); ?>" value="<?php echo esc_attr( $middle_default ); ?>" class="primary-input" readonly>
				<label class="wpforms-sub-label"><?php esc_html_e( 'Middle', 'wpforms-lite' ); ?></label>
			</div>

			<div class="wpforms-last-name">
				<input type="text" placeholder="<?php echo esc_attr( $last_placeholder ); ?>" value="<?php echo esc_attr( $last_default ); ?>" class="primary-input" readonly>
				<label class="wpforms-sub-label"><?php esc_html_e( 'Last', 'wpforms-lite' ); ?></label>
			</div>

		</div>

		<?php
		// Description.
		$this->field_preview_option( 'description', $field );
	}

	/**
	 * Field display on the form front-end.
	 *
	 * @since 1.0.0
	 *
	 * @param array $field Field information.
	 * @param array $deprecated Deprecated parameter, not used anymore.
	 * @param array $form_data Form data and settings.
	 */
	public function field_display( $field, $deprecated, $form_data ) {

		// Define data.
		$format  = ! empty( $field['format'] ) ? esc_attr( $field['format'] ) : 'first-last';
		$primary = ! empty( $field['properties']['inputs']['primary'] ) ? $field['properties']['inputs']['primary'] : '';
		$first   = ! empty( $field['properties']['inputs']['first'] ) ? $field['properties']['inputs']['first'] : '';
		$middle  = ! empty( $field['properties']['inputs']['middle'] ) ? $field['properties']['inputs']['middle'] : '';
		$last    = ! empty( $field['properties']['inputs']['last'] ) ? $field['properties']['inputs']['last'] : '';

		// Simple format.
		if ( 'simple' === $format ) {

			// Primary field (Simple).
			printf(
				'<input type="text" %s %s>',
				wpforms_html_attributes( $primary['id'], $primary['class'], $primary['data'], $primary['attr'] ),
				$primary['required']
			);

		// Expanded formats.
		} else {

			// Row wrapper.
			echo '<div class="wpforms-field-row wpforms-field-' . sanitize_html_class( $field['size'] ) . '">';

				// First name.
				echo '<div ' . wpforms_html_attributes( false, $first['block'] ) . '>';
					$this->field_display_sublabel( 'first', 'before', $field );
					printf(
						'<input type="text" %s %s>',
						wpforms_html_attributes( $first['id'], $first['class'], $first['data'], $first['attr'] ),
						$first['required']
					);
					$this->field_display_sublabel( 'first', 'after', $field );
					$this->field_display_error( 'first', $field );
				echo '</div>';

				// Middle name.
				if ( 'first-middle-last' === $format ) {
					echo '<div ' . wpforms_html_attributes( false, $middle['block'] ) . '>';
						$this->field_display_sublabel( 'middle', 'before', $field );
						printf(
							'<input type="text" %s %s>',
							wpforms_html_attributes( $middle['id'], $middle['class'], $middle['data'], $middle['attr'] ),
							$middle['required']
						);
						$this->field_display_sublabel( 'middle', 'after', $field );
						$this->field_display_error( 'middle', $field );
					echo '</div>';
				}

				// Last name.
				echo '<div ' . wpforms_html_attributes( false, $last['block'] ) . '>';
					$this->field_display_sublabel( 'last', 'before', $field );
					printf(
						'<input type="text" %s %s>',
						wpforms_html_attributes( $last['id'], $last['class'], $last['data'], $last['attr'] ),
						$last['required']
					);
					$this->field_display_sublabel( 'last', 'after', $field );
					$this->field_display_error( 'last', $field );
				echo '</div>';

			echo '</div>';

		}
	}

	/**
	 * Validate field on form submit.
	 *
	 * @since 1.0.0
	 *
	 * @param int          $field_id     Field id.
	 * @param array|string $field_submit Field submit.
	 * @param array        $form_data    Form data.
	 */
	public function validate( $field_id, $field_submit, $form_data ) {

		if ( empty( $form_data['fields'][ $field_id ]['required'] ) ) {
			return;
		}

		// Extended validation needed for the different name fields.
		$form_id  = $form_data['id'];
		$format   = $form_data['fields'][ $field_id ]['format'];
		$required = wpforms_get_required_label();
		$process  = wpforms()->get( 'process' );

		if ( $format === 'simple' && wpforms_is_empty_string( $field_submit ) ) {
			$process->errors[ $form_id ][ $field_id ] = $required;

			return;
		}

		if ( ! ( $format === 'first-last' || $format === 'first-middle-last' ) ) {
			return;
		}

		$this->validate_complicated_formats( $process, $form_id, $field_id, $field_submit, $required );
	}

	/**
	 * Format and sanitize field.
	 *
	 * @since 1.0.0
	 *
	 * @param int   $field_id     Field ID.
	 * @param mixed $field_submit Field value that was submitted.
	 * @param array $form_data    Form data and settings.
	 */
	public function format( $field_id, $field_submit, $form_data ) {
		// Define data.
		$name   = isset( $form_data['fields'][ $field_id ]['label'] ) && ! wpforms_is_empty_string( $form_data['fields'][ $field_id ]['label'] ) ? $form_data['fields'][ $field_id ]['label'] : '';
		$first  = isset( $field_submit['first'] ) && ! wpforms_is_empty_string( $field_submit['first'] ) ? $field_submit['first'] : '';
		$middle = isset( $field_submit['middle'] ) && ! wpforms_is_empty_string( $field_submit['middle'] ) ? $field_submit['middle'] : '';
		$last   = isset( $field_submit['last'] ) && ! wpforms_is_empty_string( $field_submit['last'] ) ? $field_submit['last'] : '';

		if ( is_array( $field_submit ) ) {
			$value = implode( ' ', array_filter( [ $first, $middle, $last ] ) );
		} else {
			$value = $field_submit;
		}

		// Set final field details.
		wpforms()->get( 'process' )->fields[ $field_id ] = [
			'name'   => sanitize_text_field( $name ),
			'value'  => sanitize_text_field( $value ),
			'id'     => absint( $field_id ),
			'type'   => $this->type,
			'first'  => sanitize_text_field( $first ),
			'middle' => sanitize_text_field( $middle ),
			'last'   => sanitize_text_field( $last ),
		];
	}

	/**
	 * Determine if the field requires fieldset+legend instead of the regular field label.
	 *
	 * @since 1.8.1
	 *
	 * @param bool  $requires_fieldset True if requires fieldset.
	 * @param array $field             Field data.
	 *
	 * @return bool
	 *
	 * @noinspection PhpUnusedParameterInspection
	 */
	public function is_field_requires_fieldset( $requires_fieldset, $field ) {

		return isset( $field['format'] ) && $field['format'] !== 'simple';
	}

	/**
	 * Validate complicated formats.
	 *
	 * @since 1.8.2.3
	 *
	 * @param WPForms_Process $process      Process class instance.
	 * @param int|string      $form_id      Form id.
	 * @param int|string      $field_id     Field id.
	 * @param array           $field_submit Field submit.
	 * @param string          $required     Required message text.
	 */
	private function validate_complicated_formats( $process, $form_id, $field_id, $field_submit, $required ) {

		// Prevent PHP Warning: Illegal string offset ‘first’ or 'last'.
		if ( isset( $process->errors[ $form_id ][ $field_id ] ) ) {
			$process->errors[ $form_id ][ $field_id ] = (array) $process->errors[ $form_id ][ $field_id ];
		}

		if ( isset( $field_submit['first'] ) && wpforms_is_empty_string( $field_submit['first'] ) ) {
			$process->errors[ $form_id ][ $field_id ]['first'] = $required;
		}

		if ( isset( $field_submit['last'] ) && wpforms_is_empty_string( $field_submit['last'] ) ) {
			$process->errors[ $form_id ][ $field_id ]['last'] = $required;
		}
	}
}

new WPForms_Field_Name();