gistfile1.txt

add_action("gform_field_advanced_settings", "ounce_gform_field_advanced_settings", 10, 1);

function ounce_gform_field_advanced_settings($position, $form_id){
    
    if($position == 50){
        ?>
        <li id="populate_taxonomy_settings" style="display:block;">
            <label for="field_admin_label">
                <?php _e("Populate with a Taxonomy", "gravityforms"); ?>
                <?php gform_tooltip("form_field_custom_taxonomy") ?>
            </label>
            <input type="checkbox" id="field_enable_populate_taxonomy" onclick="togglePopulateTaxonomy(jQuery('#field_populate_taxonomy'), '');" /> Enable population with a taxonomy<br />
            
            <select id="field_populate_taxonomy" onchange="SetFieldProperty('populateTaxonomy', jQuery(this).val());" style="margin-top:10px; display:none;">
                <option value="" style="color:#999;">Select a Taxonomy</option>
            <?php
            $taxonomies = get_taxonomies('', 'objects');
            foreach($taxonomies as $taxonomy): ?>
            
                <option value="<?php echo $taxonomy->name; ?>"><?php echo $taxonomy->label; ?></option>
                
            <?php endforeach; ?>
            </select>
            
        </li>
        <?php
    }
    
}

// action to inject supporting script to the form editor page
add_action("gform_editor_js", "ounce_gform_editor_scripts");
function ounce_gform_editor_scripts(){
    ?>
    <script type='text/javascript'>

        jQuery(document).bind("gform_load_field_settings", function(event, field, form){
            
            var valid_types = new Array('select');
            if(jQuery.inArray(field['type'], valid_types) != -1) {
                jQuery('#populate_taxonomy_settings').show();
            } else {
                jQuery('#populate_taxonomy_settings').hide();
            }
            
            var populateTaxonomy = (typeof field['populateTaxonomy'] != 'undefined' && field['populateTaxonomy'] != '') ? field['populateTaxonomy'] : false;
            
            jQuery("#field_enable_populate_taxonomy").attr("checked", populateTaxonomy != false);
            togglePopulateTaxonomy(jQuery('#field_populate_taxonomy'), populateTaxonomy);
            
        });
        
        function togglePopulateTaxonomy(elem, taxonomy){
            
            var checked = jQuery("#field_enable_populate_taxonomy").attr('checked');
            
            if(checked){
                jQuery(elem).slideDown(function(){
                    jQuery(this).val(taxonomy); 
                });
            } else {
                jQuery(elem).slideUp(function(){
                    jQuery(this).val(taxonomy); 
                });
            }
            
            
        }
        
    </script>
    <?php
}

// filter to add a new tooltip
add_filter('gform_tooltips', 'ounce_gform_tooltips');
function ounce_gform_tooltips($tooltips){
   $tooltips["form_field_custom_taxonomy"] = "<h6>Populate with a Taxonomy</h6>Check this box to populate this field from a taxonomy.";
   return $tooltips;
}

// filter to populate taxonomy in designated fields
add_filter('gform_pre_render', 'ounce_gform_populate_taxonomy');
function ounce_gform_populate_taxonomy($form){
    
    foreach($form['fields'] as &$field){
        
        if(!$field['populateTaxonomy'])
            continue;
        
        $taxonomy = $field['populateTaxonomy'];
        $first_choice = $field['choices'][0]['text'];
        $field['choices'] = ounce_taxonomy_as_choices($taxonomy, $first_choice);
    }

    return $form;
}

function ounce_taxonomy_as_choices($taxonomy = "categories", $first_choice = '') {
    
    $terms = get_terms($taxonomy, 'orderby=name&hide_empty=0');
    $taxonomy = get_taxonomy($taxonomy);
    $choices = array();
    $i = 0;
    
    switch($first_choice){
    
    // if no default option is specified, dynamically create based on taxonomy name
    case '':
        $choices[$i]['text'] = "Select a {$taxonomy->labels->singular_name}";
        $choices[$i]['value'] = "";
        $i++;
        break;
        
    // populate the first item from the original choices array
    default:
        $choices[$i]['text'] = $first_choice;
        $choices[$i]['value'] = '';
        $i++;
        break;
    }
    
    foreach($terms as $term) {
        $choices[$i]['text'] = $term->name;
        $choices[$i]['value'] = $term->term_id;
        $i++;
    }
    
    return $choices;
}

add_action('gform_post_submission', 'ounce_gform_post_submission', 10, 1);

function ounce_gform_post_submission($entry, $form) {
    
    // if no post was created, return
    if(!$entry['post_id'])
  	echo 'Returning with no form';
        return;
    
	echo 'Returning with a form';
    foreach($form['fields'] as $field){
        
        if(!$field['populateTaxonomy'])
            continue;
        
        $taxonomy = $field['populateTaxonomy'];
        $term_id = $entry[$field['id']];
    }
    
    // if we have a taxonomy and a field id, add term to post
    if($taxonomy && $term_id)
        ounce_add_term_to_post($taxonomy, $term_id, $entry['post_id']);

}

// add term from taxonomy to post
function ounce_add_term_to_post($taxonomy = "categories", $term_id, $post_id) {

    $terms = get_terms($taxonomy, array('hide_empty' => 0));
    
    foreach($terms as $term) {
        
        if($term->term_id == $term_id)
            $result = wp_set_object_terms($post_id, (int) $term_id, $taxonomy, false);
            
    }

}