Multiple Entries by List Field

<?php
/**
 * Gravity Wiz // Gravity Forms // Multiple Entries by List Field
 * https://gravitywiz.com/
 *
 * Create multiple entries based on the rows of a List field. All other field data will be duplicated for each entry.
 * List field inputs are mapped to Admin-only fields on the form.
 *
 * Plugin Name:  Gravity Forms - Multiple Entries by List Field
 * Plugin URI:   https://gravitywiz.com/
 * Description:  Create multiple by entries based on the rows of a List field.
 * Author:       Gravity Wiz
 * Version:      0.7
 * Author URI:   https://gravitywiz.com/
 */
class GW_Multiple_Entries_List_Field {

	public function __construct( $args = array() ) {

		// set our default arguments, parse against the provided arguments, and store for use throughout the class
		$this->_args = wp_parse_args( $args, array(
			'form_id'            => false,
			'field_id'           => false,
			'field_map'          => array(),
			'preserve_list_data' => false,
			'append_list_data'   => false,
			'formatter'          => function( $value, $field_id, $instance ) {
				return $value;
			},
			'send_notifications' => false,
		) );

		// do version check in the init to make sure if GF is going to be loaded, it is already loaded
		add_action( 'init', array( $this, 'init' ) );

	}

	public function init() {

		// make sure we're running the required minimum version of Gravity Forms
		if ( ! property_exists( 'GFCommon', 'version' ) || ! version_compare( GFCommon::$version, '1.8', '>=' ) ) {
			return;
		}

		// carry on
		add_filter( 'gform_entry_post_save', array( $this, 'create_multiple_entries' ) );
		add_filter( 'gform_entry_meta', array( $this, 'register_entry_meta' ), 10, 2 );
		add_filter( 'gform_entries_field_value', array( $this, 'display_entry_meta' ), 10, 4 );

	}

	public function create_multiple_entries( $entry ) {

		if ( ! $this->is_applicable_form( $entry['form_id'] ) ) {
			return $entry;
		}

		$data = rgar( $entry, $this->_args['field_id'] );
		if ( empty( $data ) ) {
			return $entry;
		}

		$data          = maybe_unserialize( $data );
		$working_entry = $entry;
		$form          = GFAPI::get_form( $entry['form_id'] );

		if ( ! $this->_args['preserve_list_data'] ) {
			$working_entry[ $this->_args['field_id'] ] = null;
		}

		foreach ( $data as $index => $row ) {

			$row = array_values( $row );

			foreach ( $this->_args['field_map'] as $column => $field_id ) {
				$working_entry[ (string) $field_id ] = $this->_args['formatter']( $row[ $column - 1 ], $field_id, $this );
			}

			// by default, original entry is updated with list field data; if append_list_data is true,
			if ( $index == 0 && ! $this->_args['append_list_data'] ) {

				GFAPI::update_entry( $working_entry );

				gform_add_meta( $working_entry['id'], 'gwmelf_parent_entry', true );
				gform_add_meta( $working_entry['id'], 'gwmelf_group_entry_id', $working_entry['id'] );

				/**
				 * Sync the parent entry with our working entry so when it is passed onto other plugins using this filter,
				 * it is up-to-date and if the entry is updated via this filter (looking at you, GFPaymentAddOn::entry_post_save()),
				 * our changes will be preserved.
				 */
				$entry                          = $working_entry;
				$entry['gwmelf_parent_entry']   = true;
				$entry['gwmelf_group_entry_id'] = $working_entry['id'];

			} else {

				$working_entry['id'] = null;
				$entry_id            = GFAPI::add_entry( $working_entry );

				// group entry ID refers to the parent entry ID that created the group of entries
				gform_add_meta( $entry_id, 'gwmelf_parent_entry', false );
				gform_add_meta( $entry_id, 'gwmelf_group_entry_id', $entry['id'] );

			}

			// send Gravity Forms notifications, if enabled
			if ( $this->_args['send_notifications'] ) {
				GFAPI::send_notifications( $form, $working_entry );
			}
		}

		return $entry;
	}

	public function register_entry_meta( $entry_meta, $form_id ) {

		if ( ! $this->is_applicable_form( $form_id ) ) {
			return $entry_meta;
		}

		$entry_meta['gwmelf_parent_entry'] = array(
			'label'             => __( 'Primary Entry' ),
			'is_numeric'        => false,
			'is_default_column' => true,
		);

		$entry_meta['gwmelf_group_entry_id'] = array(
			'label'             => __( 'Group ID' ),
			'is_numeric'        => true,
			'is_default_column' => true,
		);

		return $entry_meta;
	}

	public function display_entry_meta( $value, $form_id, $field_id, $entry ) {
		switch ( $field_id ) {
			case 'gwmelf_parent_entry':
				$value = (bool) $value && $value !== '&#10008;' ? '&#10004;' : '&#10008;';
				break;
		}
		return $value;
	}

	public function is_applicable_form( $form ) {

		$form_id = isset( $form['id'] ) ? $form['id'] : $form;

		return empty( $this->_args['form_id'] ) || $form_id == $this->_args['form_id'];
	}

}

# Configuration

new GW_Multiple_Entries_List_Field( array(
	'form_id'            => 123,
	'field_id'           => 4,
	'field_map'          => array(
		1 => 5, // column => fieldId
		2 => 6,
		3 => 7,
	),
	'preserve_list_data' => true,
	'append_list_data'   => true,
	'send_notifications' => false,
) );