| 1 |
<?php |
| 2 |
|
| 3 |
namespace HTML_Forms; |
| 4 |
|
| 5 |
class Forms |
| 6 |
{ |
| 7 |
|
| 8 |
/** |
| 9 |
* @var string |
| 10 |
*/ |
| 11 |
private $plugin_file; |
| 12 |
|
| 13 |
/** |
| 14 |
* @var array |
| 15 |
*/ |
| 16 |
private $settings; |
| 17 |
|
| 18 |
/** |
| 19 |
* Forms constructor. |
| 20 |
* |
| 21 |
* @param string $plugin_file |
| 22 |
* @param array $settings |
| 23 |
*/ |
| 24 |
public function __construct($plugin_file, array $settings ) |
| 25 |
{ |
| 26 |
$this->plugin_file = $plugin_file; |
| 27 |
$this->settings = $settings; |
| 28 |
} |
| 29 |
|
| 30 |
public function hook() |
| 31 |
{ |
| 32 |
add_action('init', array($this, 'register')); |
| 33 |
add_action('init', array($this, 'listen_for_submit') ); |
| 34 |
add_action('parse_request', array($this, 'listen_for_preview')); |
| 35 |
add_action('wp_enqueue_scripts', array($this, 'assets')); |
| 36 |
add_filter('hf_form_markup', 'hf_template'); |
| 37 |
} |
| 38 |
|
| 39 |
public function register() |
| 40 |
{ |
| 41 |
// register post type |
| 42 |
register_post_type('html-form', array( |
| 43 |
'labels' => array( |
| 44 |
'name' => 'HTML Forms', |
| 45 |
'singular_name' => 'HTML Form', |
| 46 |
), |
| 47 |
'public' => false, |
| 48 |
'capability_type' => 'form', |
| 49 |
) |
| 50 |
); |
| 51 |
|
| 52 |
if (function_exists('register_block_type')) { |
| 53 |
register_block_type( 'html-forms/form', array( |
| 54 |
'render_callback' => array($this, 'shortcode'), |
| 55 |
)); |
| 56 |
} |
| 57 |
|
| 58 |
add_shortcode('hf_form', array($this, 'shortcode')); |
| 59 |
|
| 60 |
// enable shortcodes in text widgets |
| 61 |
add_filter( 'widget_text', 'shortcode_unautop' ); |
| 62 |
add_filter( 'widget_text', 'do_shortcode', 11 ); |
| 63 |
} |
| 64 |
|
| 65 |
public function assets() |
| 66 |
{ |
| 67 |
$suffix = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min'; |
| 68 |
$assets_url = plugins_url( 'assets/', $this->plugin_file ); |
| 69 |
|
| 70 |
wp_register_script('html-forms', $assets_url . "js/public{$suffix}.js", array(), HTML_FORMS_VERSION, true); |
| 71 |
wp_localize_script('html-forms', 'hf_js_vars', array( |
| 72 |
'ajax_url' => admin_url('admin-ajax.php'), |
| 73 |
)); |
| 74 |
|
| 75 |
if( $this->settings['load_stylesheet'] ) { |
| 76 |
wp_enqueue_style( 'html-forms', $assets_url . "css/forms{$suffix}.css", array(), HTML_FORMS_VERSION ); |
| 77 |
} |
| 78 |
} |
| 79 |
|
| 80 |
/** |
| 81 |
* @param Form $form |
| 82 |
* @param array $data |
| 83 |
* @return string |
| 84 |
*/ |
| 85 |
public function validate_form(Form $form, array $data) |
| 86 |
{ |
| 87 |
// validate honeypot field |
| 88 |
$honeypot_key = sprintf( '_hf_h%d', $form->ID ); |
| 89 |
if( ! isset( $data[$honeypot_key] ) || $data[$honeypot_key] !== "" ) { |
| 90 |
return 'spam'; |
| 91 |
} |
| 92 |
|
| 93 |
// validate size of POST array |
| 94 |
if( count($data) > $form->get_field_count() && apply_filters( 'hf_validate_form_request_size', true ) ) { |
| 95 |
return 'spam'; |
| 96 |
} |
| 97 |
|
| 98 |
$was_required = (array) hf_array_get( $data, '_was_required', array() ); |
| 99 |
$required_fields = $form->get_required_fields(); |
| 100 |
foreach ($required_fields as $field_name) { |
| 101 |
$value = hf_array_get( $data, $field_name ); |
| 102 |
if ( empty( $value ) && ! in_array( $field_name, $was_required ) ) { |
| 103 |
return 'required_field_missing'; |
| 104 |
} |
| 105 |
} |
| 106 |
|
| 107 |
$email_fields = $form->get_email_fields(); |
| 108 |
foreach ($email_fields as $field_name) { |
| 109 |
$value = hf_array_get( $data, $field_name ); |
| 110 |
if ( ! empty( $value ) && ! is_email( $value ) ) { |
| 111 |
return 'invalid_email'; |
| 112 |
} |
| 113 |
} |
| 114 |
|
| 115 |
$error_code = ''; |
| 116 |
|
| 117 |
/** |
| 118 |
* This filter allows you to perform your own form validation. The dynamic portion of the hook refers to the form slug. |
| 119 |
* |
| 120 |
* Return a non-empty string if you want to raise an error. |
| 121 |
* Error codes with a specific error message are: "required_field_missing", "invalid_email", and "error" |
| 122 |
* |
| 123 |
* @param string $error_code |
| 124 |
* @param Form $form |
| 125 |
* @param array $data |
| 126 |
*/ |
| 127 |
$error_code = apply_filters( 'hf_validate_form_' . $form->slug, $error_code, $form, $data ); |
| 128 |
|
| 129 |
/** |
| 130 |
* This filter allows you to perform your own form validation. |
| 131 |
* |
| 132 |
* Return a non-empty string if you want to raise an error. |
| 133 |
* Error codes with a specific error message are: "required_field_missing", "invalid_email", and "error" |
| 134 |
* |
| 135 |
* @param string $error_code |
| 136 |
* @param Form $form |
| 137 |
* @param array $data |
| 138 |
*/ |
| 139 |
$error_code = apply_filters( 'hf_validate_form', $error_code, $form, $data ); |
| 140 |
if( ! empty( $error_code ) ) { |
| 141 |
return $error_code; |
| 142 |
} |
| 143 |
|
| 144 |
// all good: no errors! |
| 145 |
return ''; |
| 146 |
} |
| 147 |
|
| 148 |
/** |
| 149 |
* Sanitize array with values before saving. Can be called recursively. |
| 150 |
* |
| 151 |
* @param mixed $value |
| 152 |
* @return mixed |
| 153 |
*/ |
| 154 |
public function sanitize( $value ) |
| 155 |
{ |
| 156 |
if (is_string($value)) { |
| 157 |
// strip slashes |
| 158 |
$value = stripslashes( $value ); |
| 159 |
|
| 160 |
// strip all HTML tags & whitespace |
| 161 |
$value = trim(strip_tags($value)); |
| 162 |
|
| 163 |
// convert & back to & |
| 164 |
$value = html_entity_decode($value, ENT_NOQUOTES); |
| 165 |
} elseif ( is_array($value) || is_object($value) ) { |
| 166 |
$new_value = array(); |
| 167 |
$vars = is_array( $value ) ? $value : get_object_vars( $value ); |
| 168 |
|
| 169 |
foreach($vars as $key => $sub_value) { |
| 170 |
// skip empty values |
| 171 |
if(empty($sub_value)) { |
| 172 |
continue; |
| 173 |
} |
| 174 |
|
| 175 |
// sanitize key |
| 176 |
$key = trim(strip_tags($key)); |
| 177 |
|
| 178 |
// sanitize sub value |
| 179 |
$new_value[$key] = $this->sanitize($sub_value); |
| 180 |
} |
| 181 |
$value = is_object( $value ) ? (object) $new_value : $new_value; |
| 182 |
} |
| 183 |
|
| 184 |
return $value; |
| 185 |
} |
| 186 |
|
| 187 |
/** |
| 188 |
* @return array |
| 189 |
*/ |
| 190 |
public function get_request_data() { |
| 191 |
$data = $_POST; |
| 192 |
|
| 193 |
if( ! empty( $_FILES ) ) { |
| 194 |
foreach( $_FILES as $field_name => $file ) { |
| 195 |
// only add non-empty files so that required field validation works as expected |
| 196 |
// upload could still have errored at this point |
| 197 |
if( $file['error'] !== UPLOAD_ERR_NO_FILE ) { |
| 198 |
$data[$field_name] = $file; |
| 199 |
} |
| 200 |
} |
| 201 |
} |
| 202 |
|
| 203 |
return $data; |
| 204 |
} |
| 205 |
|
| 206 |
public function listen_for_submit() |
| 207 |
{ |
| 208 |
|
| 209 |
// only respond to AJAX requests with _hf_form_id set. |
| 210 |
if (empty($_POST['_hf_form_id']) |
| 211 |
|| empty( $_SERVER['HTTP_X_REQUESTED_WITH'] ) |
| 212 |
|| strtolower( $_SERVER['HTTP_X_REQUESTED_WITH'] ) !== strtolower( 'XMLHttpRequest' ) ) { |
| 213 |
return; |
| 214 |
} |
| 215 |
|
| 216 |
$data = $this->get_request_data(); |
| 217 |
$form_id = (int) $data['_hf_form_id']; |
| 218 |
$form = hf_get_form($form_id); |
| 219 |
$error_code = $this->validate_form($form, $data); |
| 220 |
|
| 221 |
if (empty( $error_code ) ) { |
| 222 |
|
| 223 |
/** |
| 224 |
* Filters the field names that should be ignored on the Submission object. |
| 225 |
* Fields starting with an underscore (_) are ignored by default. |
| 226 |
* |
| 227 |
* @param array $names |
| 228 |
*/ |
| 229 |
$ignored_field_names = apply_filters( 'hf_ignored_field_names', array() ); |
| 230 |
|
| 231 |
// filter out ignored field names |
| 232 |
foreach( $data as $key => $value ) { |
| 233 |
if( $key[0] === '_' || in_array( $key, $ignored_field_names ) ) { |
| 234 |
unset( $data[$key] ); |
| 235 |
continue; |
| 236 |
} |
| 237 |
|
| 238 |
// this detects the WPBruiser token field to ensure it isn't stored |
| 239 |
// CAVEAT: this will detect any non-uppercase string with 2 dashes in the field name and no whitespace in the field value |
| 240 |
if ( is_string($key) && is_string($value) && strtoupper($key) !== $key && substr_count($key, '-') >= 2 && substr_count(trim($value), ' ') === 0) { |
| 241 |
unset( $data[$key] ); |
| 242 |
continue; |
| 243 |
} |
| 244 |
} |
| 245 |
|
| 246 |
// sanitize data: strip tags etc. |
| 247 |
$data = $this->sanitize( $data ); |
| 248 |
|
| 249 |
// save form submission |
| 250 |
$submission = new Submission(); |
| 251 |
$submission->form_id = $form_id; |
| 252 |
$submission->data = $data; |
| 253 |
$submission->ip_address = ! empty( $_SERVER['REMOTE_ADDR'] ) ? sanitize_text_field( $_SERVER['REMOTE_ADDR'] ) : ''; |
| 254 |
$submission->user_agent = ! empty( $_SERVER['HTTP_USER_AGENT'] ) ? sanitize_text_field( $_SERVER['HTTP_USER_AGENT'] ) : ''; |
| 255 |
$submission->referer_url = ! empty( $_SERVER['HTTP_REFERER'] ) ? sanitize_text_field( $_SERVER['HTTP_REFERER'] ) : ''; |
| 256 |
$submission->submitted_at = gmdate( 'Y-m-d H:i:s' ); |
| 257 |
|
| 258 |
// save submission object so that other form processor have an insert ID to work with (eg file upload) |
| 259 |
if( $form->settings['save_submissions'] ) { |
| 260 |
$submission->save(); |
| 261 |
} |
| 262 |
|
| 263 |
/** |
| 264 |
* General purpose hook that runs before all form actions, so we can still modify the submission object that is passed to actions. |
| 265 |
*/ |
| 266 |
do_action( 'hf_process_form', $form, $submission ); |
| 267 |
|
| 268 |
// re-save submission object for convenience in form processors hooked into hf_process_form |
| 269 |
if( $form->settings['save_submissions'] ) { |
| 270 |
$submission->save(); |
| 271 |
} |
| 272 |
|
| 273 |
// process form actions |
| 274 |
if ( isset( $form->settings['actions'] ) ) { |
| 275 |
foreach( $form->settings['actions'] as $action_settings ) { |
| 276 |
/** |
| 277 |
* Processes the specified form action and passes related data. |
| 278 |
* |
| 279 |
* @param array $action_settings |
| 280 |
* @param Submission $submission |
| 281 |
* @param Form $form |
| 282 |
*/ |
| 283 |
do_action('hf_process_form_action_' . $action_settings['type'], $action_settings, $submission, $form ); |
| 284 |
} |
| 285 |
} |
| 286 |
|
| 287 |
/** |
| 288 |
* General purpose hook after all form actions have been processed for this specific form. The dynamic portion of the hook refers to the form slug. |
| 289 |
* |
| 290 |
* @param Submission $submission |
| 291 |
* @param Form $form |
| 292 |
*/ |
| 293 |
do_action( "hf_form_{$form->slug}_success", $submission, $form ); |
| 294 |
|
| 295 |
/** |
| 296 |
* General purpose hook after all form actions have been processed. |
| 297 |
* |
| 298 |
* @param Submission $submission |
| 299 |
* @param Form $form |
| 300 |
*/ |
| 301 |
do_action( 'hf_form_success', $submission, $form ); |
| 302 |
} else { |
| 303 |
/** |
| 304 |
* General purpose hook for when a form error occurred |
| 305 |
* |
| 306 |
* @param string $error_code |
| 307 |
* @param Form $form |
| 308 |
* @param array $data |
| 309 |
*/ |
| 310 |
do_action( 'hf_form_error', $error_code, $form, $data ); |
| 311 |
} |
| 312 |
|
| 313 |
// Delay response until "wp_loaded" hook to give other plugins a chance to process stuff. |
| 314 |
add_action( 'wp_loaded', function() use($error_code, $form, $data) { |
| 315 |
$response = $this->get_response_for_error_code($error_code, $form, $data); |
| 316 |
|
| 317 |
// clear output, some plugin or hooked code might have thrown errors by now. |
| 318 |
if( ob_get_level() > 0 ) { |
| 319 |
ob_end_clean(); |
| 320 |
} |
| 321 |
|
| 322 |
send_origin_headers(); |
| 323 |
send_nosniff_header(); |
| 324 |
nocache_headers(); |
| 325 |
|
| 326 |
wp_send_json($response, 200); |
| 327 |
exit; |
| 328 |
}); |
| 329 |
} |
| 330 |
|
| 331 |
public function listen_for_preview() { |
| 332 |
if( empty( $_GET['hf_preview_form'] ) || ! current_user_can( 'edit_forms' ) ) { |
| 333 |
return; |
| 334 |
} |
| 335 |
|
| 336 |
try { |
| 337 |
$form = hf_get_form( $_GET['hf_preview_form'] ); |
| 338 |
} catch( \Exception $e ) { |
| 339 |
return; |
| 340 |
} |
| 341 |
|
| 342 |
show_admin_bar(false); |
| 343 |
add_filter( 'pre_handle_404', '__return_true' ); |
| 344 |
remove_all_actions( 'template_redirect' ); |
| 345 |
add_action( 'template_redirect', function() use($form) { |
| 346 |
// clear output, some plugin or hooked code might have thrown errors by now. |
| 347 |
if( ob_get_level() > 0 ) { |
| 348 |
ob_end_clean(); |
| 349 |
} |
| 350 |
|
| 351 |
status_header(200); |
| 352 |
require dirname( $this->plugin_file ) . '/views/form-preview.php'; |
| 353 |
exit; |
| 354 |
}); |
| 355 |
} |
| 356 |
|
| 357 |
private function get_response_for_error_code( $error_code, Form $form, $data = array() ) |
| 358 |
{ |
| 359 |
// return success response for empty error code string or spam (to trick bots) |
| 360 |
if( $error_code === "" || $error_code === "spam" ) { |
| 361 |
$response = array( |
| 362 |
'message' => array( |
| 363 |
'type' => 'success', |
| 364 |
'text' => $form->get_message( 'success' ), |
| 365 |
), |
| 366 |
'hide_form' => (bool)$form->settings['hide_after_success'], |
| 367 |
); |
| 368 |
|
| 369 |
if (!empty($form->settings['redirect_url'])) { |
| 370 |
$response['redirect_url'] = hf_replace_data_variables($form->settings['redirect_url'], $data, 'urlencode'); |
| 371 |
} |
| 372 |
|
| 373 |
return $response; |
| 374 |
} |
| 375 |
|
| 376 |
// get error message |
| 377 |
$message = $form->get_message( $error_code ); |
| 378 |
if( empty( $message ) ) { |
| 379 |
$message = $form->get_message( 'error' ); |
| 380 |
} |
| 381 |
|
| 382 |
// return error response |
| 383 |
return $response = array( |
| 384 |
'message' => array( |
| 385 |
'type' => 'warning', |
| 386 |
'text' => $message, |
| 387 |
), |
| 388 |
'error' => $error_code, |
| 389 |
); |
| 390 |
} |
| 391 |
|
| 392 |
public function shortcode($attributes = array(), $content = '') |
| 393 |
{ |
| 394 |
if (empty($attributes['slug']) && empty($attributes['id'])) { |
| 395 |
return ''; |
| 396 |
} |
| 397 |
|
| 398 |
$slug_or_id = empty( $attributes['id'] ) ? $attributes['slug'] : $attributes['id']; |
| 399 |
try { |
| 400 |
$form = hf_get_form( $slug_or_id ); |
| 401 |
} catch( \Exception $e ) { |
| 402 |
if ( ! current_user_can( 'manage_options' ) ) { |
| 403 |
return $content; |
| 404 |
} |
| 405 |
|
| 406 |
return sprintf( '<p><strong>%s</strong> %s</p>', __( 'Error:', 'html-forms' ), sprintf( __( 'No form found with slug %s', 'html-forms' ), $attributes['slug'] ) ); |
| 407 |
} |
| 408 |
|
| 409 |
return $form . $content; |
| 410 |
} |
| 411 |
} |
| 412 |
|
