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Gravity Wiz // Gravity Forms // Cache Buster
<?php
/**
* Gravity Wiz // Gravity Forms // Cache Buster
*
* Bypass your website cache when loading a Gravity Forms form.
*
* @version 0.2
* @author David Smith <david@gravitywiz.com>
* @license GPL-2.0+
* @link http://gravitywiz.com/
*
* Plugin Name: Gravity Forms Cache Buster
* Plugin URI: http://gravitywiz.com/
* Description: Bypass your website cache when loading a Gravity Forms form.
* Author: Gravity Wiz
* Version: 0.2
* Author URI: http://gravitywiz.com
*
* @todo
* - Pass query string to AJAX form.
*/
class GW_Cache_Buster {
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,
'field_id' => false
) );
// 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', '>=' ) ) {
return;
}
add_filter( 'gform_shortcode_form', array( $this, 'shortcode' ), 10, 3 );
add_action( 'wp_ajax_nopriv_gfcb_get_form', array( $this, 'ajax_get_form' ) );
add_action( 'wp_ajax_gfcb_get_form', array( $this, 'ajax_get_form' ) );
}
public function shortcode( $markup, $attributes, $content ) {
$atts = shortcode_atts( array(
'id' => 0,
'cachebuster' => false
), $attributes );
$form_id = $atts['id'];
if( ! $this->is_cache_busting_applicable() ) {
return $markup;
}
$is_enabled = rgar( $atts, 'cachebuster' ) || gf_apply_filters( array( 'gfcb_enable_cache_buster', $form_id ), false );
if( ! $is_enabled ) {
return $markup;
}
ob_start();
?>
<div id="gf-cache-buster-form-container-<?php echo $form_id; ?>" class="gf-cache-buster-form-container">
<div class="loader"></div>
<style type="text/css">
.gf-cache-buster-form-container { }
.loader,
.loader:before,
.loader:after {
border-radius: 50%;
width: 2.5em;
height: 2.5em;
-webkit-animation-fill-mode: both;
animation-fill-mode: both;
-webkit-animation: load7 1.8s infinite ease-in-out;
animation: load7 1.8s infinite ease-in-out;
}
.loader {
color: rgba( 0, 0, 0, 0.5 );
font-size: 10px;
margin: 0 auto 80px;
position: relative;
text-indent: -9999em;
-webkit-transform: translateZ(0);
-ms-transform: translateZ(0);
transform: translateZ(0);
-webkit-animation-delay: -0.16s;
animation-delay: -0.16s;
}
.loader:before,
.loader:after {
content: '';
position: absolute;
top: 0;
}
.loader:before {
left: -3.5em;
-webkit-animation-delay: -0.32s;
animation-delay: -0.32s;
}
.loader:after {
left: 3.5em;
}
@-webkit-keyframes load7 {
0%,
80%,
100% {
box-shadow: 0 2.5em 0 -1.3em;
}
40% {
box-shadow: 0 2.5em 0 0;
}
}
@keyframes load7 {
0%,
80%,
100% {
box-shadow: 0 2.5em 0 -1.3em;
}
40% {
box-shadow: 0 2.5em 0 0;
}
}
</style>
</div>
<script type="text/javascript">
( function ( $ ) {
$.post( '<?php echo admin_url( 'admin-ajax.php' ); ?>?action=gfcb_get_form&form_id=<?php echo $form_id; ?>', {
action: 'gfcb_get_form',
form_id: '<?php echo $form_id; ?>',
atts: '<?php echo json_encode( $attributes ); ?>'
}, function( response ) {
$( '#gf-cache-buster-form-container-<?php echo $form_id; ?>' ).html( response ).fadeIn();
if( window['gformInitDatepicker'] ) {
gformInitDatepicker();
}
} );
} ( jQuery ) );
</script>
<?php
return ob_get_clean();
}
public function is_cache_busting_applicable() {
// POSTED and LOGGED-IN requests are not typically cached
return empty( $_POST ) || ! is_user_logged_in();
}
public function ajax_get_form() {
$form_id = isset( $_POST['form_id'] ) ? absint( $_POST['form_id'] ) : 0;
if( ! $form_id ) {
$form_id = isset( $_GET['form_id'] ) ? absint( $_GET['form_id'] ) : 0;
}
$atts = json_decode( rgpost( 'atts' ) );
gravity_form( $form_id, rgar( $atts, 'title' ), rgar( $atts, 'description' ), false, rgar( $atts, 'field_values' ), true /* default to true; add support for non-ajax in the future */, rgar( $atts, 'tabindex' ) );
die();
}
}
# Configuration
new GW_Cache_Buster();
//add_filter( 'gfcb_enable_cache_buster', '__return_true' );
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