Gravity Wiz // Gravity Forms // Populate Date

gw-gravity-forms-populate-date-usage.php

<?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 THIS SNIPPET MAY BE OUTDATED.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/gravity-forms/gw-populate-date.php
 */
/**
 * Gravity Wiz // Gravity Forms // Populate Date (Usage)
 */

// populate current date (today)
new GW_Populate_Date( array(
    'form_id' => 39,
    'target_field_id' => 4,
) );

// populate date one day from today
new GW_Populate_Date( array(
    'form_id' => 39,
    'target_field_id' => 6,
    'modifier' => '+1 day'
) );

// populate date one year from today and specify format
new GW_Populate_Date( array(
    'form_id' => 39,
    'target_field_id' => 7,
    'modifier' => '+1 year',
    'format' => 'F j, Y' // i.e. March 10, 2015
) );

// populate date one year from user-specified date
new GW_Populate_Date( array(
    'form_id' => 39,
    'target_field_id' => 3,
    'source_field_id' => 1,
    'modifier' => '+1 year'
) );

gw-gravity-forms-populate-date.php

<?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 THIS SNIPPET MAY BE OUTDATED.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/gravity-forms/gw-populate-date.php
 */
/**
 * Gravity Wiz // Gravity Forms // Populate Date
 *
 * Provides the ability to populate a Date field with a modified date based on the current date or a user-submitted date. If the
 * modified date is based on a user-submitted date, the modified date can only be populated once the form has been submitted.
 *
 * @version	  1.4
 * @author    David Smith <david@gravitywiz.com>
 * @license   GPL-2.0+
 * @link      http://gravitywiz.com/populate-dates-gravity-form-fields/
 */
class GW_Populate_Date {

    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,
            'format'          => 'Y-m-d',
            'modifier'        => false,
            'min_date'        => false
        ) );

        if( ! $this->_args['form_id'] || ! $this->_args['target_field_id'] ) {
            return;
        }

        // time for hooks
        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;
        }

        if( $this->_args['source_field_id'] ) {
            add_action( 'gform_pre_submission', array( $this, 'populate_date_on_pre_submission' ) );
        } else {
            add_filter( 'gform_pre_render', array( $this, 'populate_date_on_pre_render' ) );
        }

    }

    public function populate_date_on_pre_render( $form ) {

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

        foreach( $form['fields'] as &$field ) {
            if( $field['id'] == $this->_args['target_field_id'] ) {

                $key = sprintf( 'gwpd_%d_%d', $form['id'], $field['id'] );
                $value = $this->get_modified_date( $field );

                $field['allowsPrepopulate'] = true;
                $field['inputName'] = $key;

                add_filter( "gform_field_value_{$key}", function() use( $value ) { return $value; } );

            }
        }

        return $form;
    }

    public function populate_date_on_pre_submission( $form ) {

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

        foreach( $form['fields'] as &$field ) {
            if( $field['id'] == $this->_args['target_field_id'] ) {

                $timestamp = $this->get_source_timestamp( GFFormsModel::get_field( $form, $this->_args['source_field_id'] ) ); 
                $value = $this->get_modified_date( $field, $timestamp );

                $_POST[ "input_{$field['id']}" ] = $value;

            }
        }

    }

    public function get_source_timestamp( $field ) {

        $raw = rgpost( 'input_' . $field['id'] );
        if( is_array( $raw ) ) {
            $raw = array_filter( $raw );
        }

        list( $format, $divider ) = $field['dateFormat'] ? array_pad( explode( '_', $field['dateFormat' ] ), 2, 'slash' ) : array( 'mdy', 'slash' );
        $dividers = array( 'slash' => '/', 'dot' => '.', 'dash' => '-' );

        if( empty( $raw ) ) {
            $raw = date( implode( $dividers[ $divider ], str_split( $format ) ) );
        }

        $date = ! is_array( $raw ) ? explode( $dividers[ $divider ], $raw ) : $raw;

        $month = $date[ strpos( $format, 'm' ) ];
        $day   = $date[ strpos( $format, 'd' ) ];
        $year  = $date[ strpos( $format, 'y' ) ];

        $timestamp = mktime( 0, 0, 0, $month, $day, $year );

        return $timestamp;
    }

    public function get_modified_date( $field, $timestamp = false ) {

        if( ! $timestamp ) {
            $timestamp = current_time( 'timestamp' );
        }

        if( GFFormsModel::get_input_type( $field ) == 'date' ) {

            list( $format, $divider ) = $field['dateFormat'] ? array_pad( explode( '_', $field['dateFormat' ] ), 2, 'slash' ) : array( 'mdy', 'slash' );
            $dividers = array( 'slash' => '/', 'dot' => '.', 'dash' => '-' );

            $format = str_replace( 'y', 'Y', $format );
            $divider = $dividers[$divider];
            $format = implode( $divider, str_split( $format ) );

        } else {

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

        }

        if( $this->_args['modifier'] ) {
            $timestamp = strtotime( $this->_args['modifier'], $timestamp );
        }

        if( $this->_args['min_date'] ) {
            $min_timestamp = strtotime( $this->_args['min_date'] ) ? strtotime( $this->_args['min_date'] ) : $this->_args['min_date'];
            if( $min_timestamp > $timestamp ) {
                $timestamp = $min_timestamp;
            }
        }

        $date = date( $format, $timestamp );

        return $date;
    }

    function is_applicable_form( $form ) {

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

        return $form_id == $this->_args['form_id'];
    }

}

# Configuration

new GW_Populate_Date( array(
    'form_id' => 598,
    'target_field_id' => 2,
    'source_field_id' => 1,
    'modifier' => '+1 day'
) );

I believe the create_function() used in this snippet is depreciated - I am seeing a lot of error messages in my debug.log file.

@Wordna1 Updated. 🙂

Thank you for this function! Can the date also be populated in the email notification subject area?

Thank you for this function! Can the date also be populated in the email notification subject area?

Hm, could you elaborate? @ashleycam3ron

👉 This Gist has been migrated to the Gravity Wiz Snippet Library:

https://github.com/gravitywiz/snippet-library/blob/master/gravity-forms/gw-populate-date.php