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Gravity Wiz // Gravity Forms // Better Pre-submission Confirmation
<?php
/**
* Better Pre-submission Confirmation
* http://gravitywiz.com/2012/08/04/better-pre-submission-confirmation/
*/
class GWPreviewConfirmation {
private static $lead;
public static function init() {
add_filter( 'gform_pre_render', array( __class__, 'replace_merge_tags' ) );
}
public static function replace_merge_tags( $form ) {
if( ! class_exists( 'GFFormDisplay' ) ) {
return $form;
}
$current_page = isset(GFFormDisplay::$submission[$form['id']]) ? GFFormDisplay::$submission[$form['id']]['page_number'] : 1;
$fields = array();
// get all HTML fields on the current page
foreach($form['fields'] as &$field) {
// skip all fields on the first page
if(rgar($field, 'pageNumber') <= 1)
continue;
$default_value = rgar($field, 'defaultValue');
preg_match_all('/{.+}/', $default_value, $matches, PREG_SET_ORDER);
if(!empty($matches)) {
// if default value needs to be replaced but is not on current page, wait until on the current page to replace it
if(rgar($field, 'pageNumber') != $current_page) {
$field['defaultValue'] = '';
} else {
$field['defaultValue'] = self::preview_replace_variables($default_value, $form);
}
}
// only run 'content' filter for fields on the current page
if(rgar($field, 'pageNumber') != $current_page)
continue;
$html_content = rgar($field, 'content');
preg_match_all('/{.+}/', $html_content, $matches, PREG_SET_ORDER);
if(!empty($matches)) {
$field['content'] = self::preview_replace_variables($html_content, $form);
}
}
return $form;
}
/**
* Adds special support for file upload, post image and multi input merge tags.
*/
public static function preview_special_merge_tags($value, $input_id, $merge_tag, $field) {
// added to prevent overriding :noadmin filter (and other filters that remove fields)
if( ! $value )
return $value;
$input_type = RGFormsModel::get_input_type($field);
$is_upload_field = in_array( $input_type, array('post_image', 'fileupload') );
$is_multi_input = is_array( rgar($field, 'inputs') );
$is_input = intval( $input_id ) != $input_id;
if( !$is_upload_field && !$is_multi_input )
return $value;
// if is individual input of multi-input field, return just that input value
if( $is_input )
return $value;
$form = RGFormsModel::get_form_meta($field['formId']);
$lead = self::create_lead($form);
$currency = GFCommon::get_currency();
if(is_array(rgar($field, 'inputs'))) {
$value = RGFormsModel::get_lead_field_value($lead, $field);
return GFCommon::get_lead_field_display($field, $value, $currency);
}
switch($input_type) {
case 'fileupload':
$value = self::preview_image_value("input_{$field['id']}", $field, $form, $lead);
$value = self::preview_image_display($field, $form, $value);
break;
default:
$value = self::preview_image_value("input_{$field['id']}", $field, $form, $lead);
$value = GFCommon::get_lead_field_display($field, $value, $currency);
break;
}
return $value;
}
public static function preview_image_value($input_name, $field, $form, $lead) {
$field_id = $field['id'];
$file_info = RGFormsModel::get_temp_filename($form['id'], $input_name);
$source = RGFormsModel::get_upload_url($form['id']) . "/tmp/" . $file_info["temp_filename"];
if(!$file_info)
return '';
switch(RGFormsModel::get_input_type($field)){
case "post_image":
list(,$image_title, $image_caption, $image_description) = explode("|:|", $lead[$field['id']]);
$value = !empty($source) ? $source . "|:|" . $image_title . "|:|" . $image_caption . "|:|" . $image_description : "";
break;
case "fileupload" :
$value = $source;
break;
}
return $value;
}
public static function preview_image_display($field, $form, $value) {
// need to get the tmp $file_info to retrieve real uploaded filename, otherwise will display ugly tmp name
$input_name = "input_" . str_replace('.', '_', $field['id']);
$file_info = RGFormsModel::get_temp_filename($form['id'], $input_name);
$file_path = $value;
if(!empty($file_path)){
$file_path = esc_attr(str_replace(" ", "%20", $file_path));
$value = "<a href='$file_path' target='_blank' title='" . __("Click to view", "gravityforms") . "'>" . $file_info['uploaded_filename'] . "</a>";
}
return $value;
}
/**
* Retrieves $lead object from class if it has already been created; otherwise creates a new $lead object.
*/
public static function create_lead( $form ) {
if( empty( self::$lead ) ) {
self::$lead = GFFormsModel::create_lead( $form );
self::clear_field_value_cache( $form );
}
return self::$lead;
}
public static function preview_replace_variables( $content, $form ) {
$lead = self::create_lead($form);
// add filter that will handle getting temporary URLs for file uploads and post image fields (removed below)
// beware, the RGFormsModel::create_lead() function also triggers the gform_merge_tag_filter at some point and will
// result in an infinite loop if not called first above
add_filter('gform_merge_tag_filter', array('GWPreviewConfirmation', 'preview_special_merge_tags'), 10, 4);
$content = GFCommon::replace_variables($content, $form, $lead, false, false, false);
// remove filter so this function is not applied after preview functionality is complete
remove_filter('gform_merge_tag_filter', array('GWPreviewConfirmation', 'preview_special_merge_tags'));
return $content;
}
public static function clear_field_value_cache( $form ) {
if( ! class_exists( 'GFCache' ) )
return;
foreach( $form['fields'] as &$field ) {
if( GFFormsModel::get_input_type( $field ) == 'total' )
GFCache::delete( 'GFFormsModel::get_lead_field_value__' . $field['id'] );
}
}
}
GWPreviewConfirmation::init();
@fgl87

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fgl87 commented Jun 19, 2015

This is working beautifully so firstly thank you.
If used with the single image upload it shows the file in the preview.
However, in multi file-upload the item disappears and shows no images.
Is there a way to make this preview script work with multiple image uploads?
Thank you in advance.

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