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Gravity Wiz // Use List Field as Choices for Gravity Forms ~ http://gravitywiz.com/use-list-field-as-choices-for-gravity-forms/
<?php
# Basic Usage
new GW_List_Field_As_Choices( array(
'form_id' => 1,
'list_field_id' => 2,
'choice_field_ids' => 3
) );
# Enable Sorting of Choices Alphanumerically
new GW_List_Field_As_Choices( array(
'form_id' => 1,
'list_field_id' => 2,
'choice_field_ids' => 3,
'sort' => true
) );
# Populating Multiple Choice Fields
new GW_List_Field_As_Choices( array(
'form_id' => 384,
'list_field_id' => 3,
'choice_field_ids' => array( 6, 7 )
) );
# Customizing the Choice Label and Value
new GW_List_Field_As_Choices( array(
'form_id' => 384,
'list_field_id' => 2,
'choice_field_ids' => array( 4, 5 ),
'label_template' => '{Name} <span style="color:#999;font-style:italic;">({Age})</span>',
'value_template' => '{Name}'
) );
<?php
/**
* Gravity Wiz // Use List Field as Choices for Gravity Forms
*
* Adds support for populating choice-based fields (i.e. checkboxes, selects, radio buttons) with values entered in a
* List field. This functionality requires that the form has multiple pages and that the List field must be placed on
* a page prior to the choice-based field that it will populate.
*
* @author David Smith <david@gravitywiz.com>
* @license GPL-2.0+
* @link http://gravitywiz.com/use-list-field-choices-gravity-forms/
*/
class GW_List_Field_As_Choices {
function __construct( $args ) {
$this->_args = wp_parse_args( $args, array(
'form_id' => false,
'list_field_id' => false,
'choice_field_ids' => false,
'label_template' => '{0}',
'sort' => false
) );
if( ! is_array( $this->_args['choice_field_ids'] ) )
$this->_args['choice_field_ids'] = array( $this->_args['choice_field_ids'] );
extract( $this->_args ); // gives us $form_id, $list_field_id, $choices_field_id
add_filter( 'gform_pre_render', array( $this, 'populate_choice_fields' ), 9 );
add_filter( 'gform_pre_validation', array( $this, 'populate_choice_fields' ), 9 );
add_filter( 'gform_pre_submission_filter_' . $form_id, array( $this, 'populate_choice_fields' ) );
}
function populate_choice_fields( $form ) {
if( $form['id'] != $this->_args['form_id'] )
return $form;
$list_field = GFFormsModel::get_field( $form, $this->_args['list_field_id'] );
$values = GFFormsModel::get_field_value( $list_field );
// if list field doesn't have any values, let's ditch this party
if( ! is_array( $values ) )
return $form;
$choices = $this->get_list_choices( $values );
foreach( $form['fields'] as &$field ) {
if( ! $this->is_applicable_field( $field ) )
continue;
// set 'choices' for choice fields
$field['choices'] = $choices;
// only set inputs for 'checkbox' choice fields
if( GFFormsModel::get_input_type( $field ) == 'checkbox' ) {
$inputs = array();
foreach( $choices as $index => $choice ) {
$inputs[] = array(
'label' => $choice['text'],
'id' => $field['id'] . '.' . ( $index + 1 )
);
}
$field['inputs'] = $inputs;
}
}
return $form;
}
function get_list_choices( $values ) {
$choices = array();
foreach( $values as $row ) {
$label = $this->replace_template( $this->_args['label_template'], $row );
$value = isset( $this->_args['value_template'] ) ? $this->replace_template( $this->_args['value_template'], $row ) : $label;
$choices[] = array(
'text' => $label,
'value' => $value
);
}
if( $this->_args['sort'] == true )
usort( $choices, create_function( '$a, $b', 'return strnatcasecmp( $a["text"], $b["text"] );' ) );
return $choices;
}
function replace_template( $template, $row ) {
// combine our templates so we can find all matches at once
preg_match_all( '/{(\w+)}/', $template, $matches, PREG_SET_ORDER );
if( is_array( $row ) ) {
$mega_row = array_merge( $row, array_values( $row ) );
foreach( $matches as $match ) {
$template = str_replace( $match[0], rgar( $mega_row, $match[1] ), $template );
}
} else {
foreach( $matches as $match ) {
$template = str_replace( $match[0], $row, $template );
}
}
return $template;
}
function is_applicable_field( $field ) {
$is_choice_field = is_array( rgar( $field, 'choices' ) );
$is_registered_field = in_array( $field['id'], $this->_args['choice_field_ids'] );
return $is_choice_field && $is_registered_field;
}
}
/**
* Uncomment the code below by removing the pound symbols (#) in front of each line. See @link in the comment section
* at the top for additional usage instructions.
*/
# Basic Usage
# new GW_List_Field_As_Choices( array(
# 'form_id' => 1,
# 'list_field_id' => 2,
# 'choice_field_ids' => 3
# ) );
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