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<?php
/**
 * WARNING! THIS SNIPPET MAY BE OUTDATED.
 * The latest version of this snippet can be found in the Gravity Wiz Snippet Library:
 * https://github.com/gravitywiz/snippet-library/blob/master/gp-unique-id/gpuid-multiple-ids.php
 */
/**
 * Gravity Perks // GP Unique ID // Generate Multiple Unique IDs per Submission (for Gravity Forms)
 *
 * Generate multiple unique IDs. Does not work with sequential IDs.
 *
 * @version   1.2
 * @author    David Smith <david@gravitywiz.com>
 * @license   GPL-2.0+
 * @link      http://gravitywiz.com/...
 */
class GP_Unique_ID_Multiple_IDs {

    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,
            'target_field_id' => false,
            'source_field_id' => false,
            'count'           => 0
        ) );

        // 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', '>=' ) || ! function_exists( 'gp_unique_id' ) ) {
            return;
        }

        add_action( 'gform_entry_post_save', array( $this, 'populate_field_value' ), 10, 2 );
        add_action( 'gpui_check_unique_query', array( $this, 'reinforce_check_unqiue_query' ), 10, 4 );

    }

    function populate_field_value( $entry, $form ) {

        foreach( $form['fields'] as $field ) {

            if( $this->is_applicable_field( $field, $form, $entry ) ) {

                $count = $this->get_count( $entry );
                $source_field = GFFormsModel::get_field( $form, $this->_args['source_field_id'] );
                $value = array();

	            // add source field ID as first of the X IDs
	            $value[] = rgar( $entry, $source_field['id'] );

                for( $i = 1; $i < $count; $i++ ) {
                    $value[] = gp_unique_id()->get_unique( $form['id'], $source_field );
                }

                //$value = $this->save_value_to_entry( $entry['id'], $form['id'], $field, implode( "\n", $value ) );

                $entry[ $field['id'] ] = implode( "\n", $value );

	            GFAPI::update_entry( $entry );

            }

        }

        return $entry;
    }

    function save_value_to_entry( $entry_id, $form_id, $field, $value ) {
        global $wpdb;

        $result = $wpdb->insert(
            GFFormsModel::get_lead_details_table_name(),
            array(
                'lead_id'      => $entry_id,
                'form_id'      => $form_id,
                'field_number' => $field['id'],
                'value'        => $value
            ),
            array( '%d', '%d', '%d', '%s' )
        );

        return $result ? $value : false;
    }

    function get_count( $entry ) {

        $count = $this->_args['count'];

        if( is_int( $count ) ) {
            // do nothing
        } else if( is_array( $count ) ) {

	        if( isset( $count['choices'] ) ) {
		        $value = call_user_func( 'array_shift', explode( '|', rgar( $entry, $count['field_id'] ) ) );
		        $count = rgar( $count['choices'], $value );
	        } else {
		        $count = rgar( $entry, $count['field_id'] );
	        }

        } else {
            $count = 0;
        }

        return $count;
    }

    function is_applicable_field( $field, $form, $entry ) {

        $is_target_field_id = $field['id'] == $this->_args['target_field_id'];
        $is_visible   = ! GFFormsModel::is_field_hidden( $form, $field, array(), $entry );

        return $is_target_field_id && $is_visible;
    }

    function reinforce_check_unqiue_query( $query, $form_id, $field_id, $unique ) {

        $search = "AND ld.value = '{$unique}'";
        $replace = "AND ld.value LIKE '%{$unique}%'";

        $query = str_replace( $search, $replace, $query );

        return $query;
    }

}

# Configuration

new GP_Unique_ID_Multiple_IDs( array(
   'form_id'         => 694,
   'source_field_id' => 35,
   'target_field_id' => 36,
   'count'           => 2
) );