| 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 |
$this->plugin_file = $plugin_file; |
| 26 |
$this->settings = $settings; |
| 27 |
} |
| 28 |
|
| 29 |
public function hook() { |
| 30 |
add_action( 'init', array( $this, 'register' ) ); |
| 31 |
add_action( 'wp_ajax_hf_form_submit', array( $this, 'listen_for_submit' ) ); |
| 32 |
add_action( 'wp_ajax_nopriv_hf_form_submit', array( $this, 'listen_for_submit' ) ); |
| 33 |
add_action( 'init', array( $this, 'register_assets' ) ); |
| 34 |
add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_assets' ) ); |
| 35 |
add_action( 'parse_request', array( $this, 'listen_for_preview' ) ); |
| 36 |
add_filter( 'hf_form_markup', 'hf_template' ); |
| 37 |
} |
| 38 |
|
| 39 |
public function register() { |
| 40 |
// register post type |
| 41 |
register_post_type( |
| 42 |
'html-form', |
| 43 |
array( |
| 44 |
'labels' => array( |
| 45 |
'name' => 'HTML Forms', |
| 46 |
'singular_name' => 'HTML Form', |
| 47 |
), |
| 48 |
'public' => false, |
| 49 |
'capability_type' => 'form', |
| 50 |
) |
| 51 |
); |
| 52 |
|
| 53 |
if ( function_exists( 'register_block_type' ) ) { |
| 54 |
register_block_type( |
| 55 |
'html-forms/form', |
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array( |
| 57 |
'render_callback' => array( $this, 'shortcode' ), |
| 58 |
) |
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); |
| 60 |
} |
| 61 |
|
| 62 |
add_shortcode( 'hf_form', array( $this, 'shortcode' ) ); |
| 63 |
} |
| 64 |
|
| 65 |
public function register_assets() { |
| 66 |
$assets_url = plugins_url( 'assets/', $this->plugin_file ); |
| 67 |
|
| 68 |
wp_register_script( 'html-forms', $assets_url . 'js/public.js', array(), HTML_FORMS_VERSION, true ); |
| 69 |
wp_localize_script( |
| 70 |
'html-forms', |
| 71 |
'hf_js_vars', |
| 72 |
array( |
| 73 |
'ajax_url' => admin_url( 'admin-ajax.php?action=hf_form_submit' ), |
| 74 |
) |
| 75 |
); |
| 76 |
|
| 77 |
wp_register_style( 'html-forms', $assets_url . 'css/forms.css', array(), HTML_FORMS_VERSION ); |
| 78 |
add_filter( 'script_loader_tag', array( $this, 'add_defer_attribute' ), 10, 2 ); |
| 79 |
} |
| 80 |
|
| 81 |
public function enqueue_assets() { |
| 82 |
if ( $this->settings['load_stylesheet'] ) { |
| 83 |
wp_enqueue_style( 'html-forms' ); |
| 84 |
} |
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} |
| 86 |
|
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/** |
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* Adds defer attribute to our <script> element |
| 89 |
*/ |
| 90 |
public function add_defer_attribute( $tag, $handle ) { |
| 91 |
if ( $handle !== 'html-forms' ) { |
| 92 |
return $tag; |
| 93 |
} |
| 94 |
|
| 95 |
return str_replace( ' src=', ' defer src=', $tag ); |
| 96 |
} |
| 97 |
/** |
| 98 |
* @param Form $form |
| 99 |
* @param array $data |
| 100 |
* @return string |
| 101 |
*/ |
| 102 |
public function validate_form( Form $form, array $data ) { |
| 103 |
// validate honeypot field |
| 104 |
$honeypot_key = sprintf( '_hf_h%d', $form->ID ); |
| 105 |
if ( ! isset( $data[ $honeypot_key ] ) || $data[ $honeypot_key ] !== '' ) { |
| 106 |
return 'spam'; |
| 107 |
} |
| 108 |
|
| 109 |
// validate size of POST array |
| 110 |
if ( count( $data ) > $form->get_field_count() && apply_filters( 'hf_validate_form_request_size', true ) ) { |
| 111 |
return 'spam'; |
| 112 |
} |
| 113 |
|
| 114 |
$was_required = (array) hf_array_get( $data, '_was_required', array() ); |
| 115 |
$required_fields = $form->get_required_fields(); |
| 116 |
foreach ( $required_fields as $field_name ) { |
| 117 |
$value = hf_array_get( $data, $field_name ); |
| 118 |
if ( empty( $value ) && ! in_array( $field_name, $was_required ) ) { |
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return 'required_field_missing'; |
| 120 |
} |
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} |
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|
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$email_fields = $form->get_email_fields(); |
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foreach ( $email_fields as $field_name ) { |
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$value = hf_array_get( $data, $field_name ); |
| 126 |
if ( ! empty( $value ) && ! is_email( $value ) ) { |
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return 'invalid_email'; |
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} |
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} |
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|
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$error_code = ''; |
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|
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/** |
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* This filter allows you to perform your own form validation. The dynamic portion of the hook refers to the form slug. |
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* |
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* Return a non-empty string if you want to raise an error. |
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* Error codes with a specific error message are: "required_field_missing", "invalid_email", and "error" |
| 138 |
* |
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* @param string $error_code |
| 140 |
* @param Form $form |
| 141 |
* @param array $data |
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*/ |
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$error_code = apply_filters( 'hf_validate_form_' . $form->slug, $error_code, $form, $data ); |
| 144 |
|
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/** |
| 146 |
* This filter allows you to perform your own form validation. |
| 147 |
* |
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* Return a non-empty string if you want to raise an error. |
| 149 |
* Error codes with a specific error message are: "required_field_missing", "invalid_email", and "error" |
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* |
| 151 |
* @param string $error_code |
| 152 |
* @param Form $form |
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* @param array $data |
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*/ |
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$error_code = apply_filters( 'hf_validate_form', $error_code, $form, $data ); |
| 156 |
if ( ! empty( $error_code ) ) { |
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return $error_code; |
| 158 |
} |
| 159 |
|
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// all good: no errors! |
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return ''; |
| 162 |
} |
| 163 |
|
| 164 |
/** |
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* Sanitize array with values before saving. Can be called recursively. |
| 166 |
* |
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* @param mixed $value |
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* @return mixed |
| 169 |
*/ |
| 170 |
public function sanitize( $value ) { |
| 171 |
if ( is_string( $value ) ) { |
| 172 |
// do nothing if empty string |
| 173 |
if ( $value === '' ) { |
| 174 |
return $value; |
| 175 |
} |
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|
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// strip slashes |
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$value = stripslashes( $value ); |
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|
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// strip all whitespace |
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$value = trim( $value ); |
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|
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// convert & back to & |
| 184 |
$value = html_entity_decode( $value, ENT_NOQUOTES ); |
| 185 |
} elseif ( is_array( $value ) || is_object( $value ) ) { |
| 186 |
$new_value = array(); |
| 187 |
$vars = is_array( $value ) ? $value : get_object_vars( $value ); |
| 188 |
|
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// do nothing if empty array or object |
| 190 |
if ( count( $vars ) === 0 ) { |
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return $value; |
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} |
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|
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foreach ( $vars as $key => $sub_value ) { |
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// strip all whitespace & HTML from keys (!) |
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$key = trim( strip_tags( $key ) ); |
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|
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// sanitize sub value |
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$new_value[ $key ] = $this->sanitize( $sub_value ); |
| 200 |
} |
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|
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$value = is_object( $value ) ? (object) $new_value : $new_value; |
| 203 |
} |
| 204 |
|
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return $value; |
| 206 |
} |
| 207 |
|
| 208 |
/** |
| 209 |
* @return array |
| 210 |
*/ |
| 211 |
public function get_request_data() { |
| 212 |
$data = $_POST; |
| 213 |
|
| 214 |
if ( ! empty( $_FILES ) ) { |
| 215 |
foreach ( $_FILES as $field_name => $file ) { |
| 216 |
// only add non-empty files so that required field validation works as expected |
| 217 |
// upload could still have errored at this point |
| 218 |
if ( $file['error'] !== UPLOAD_ERR_NO_FILE ) { |
| 219 |
$data[ $field_name ] = $file; |
| 220 |
} |
| 221 |
} |
| 222 |
} |
| 223 |
|
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return $data; |
| 225 |
} |
| 226 |
|
| 227 |
public function listen_for_submit() { |
| 228 |
// Check nonce only if enabled in settings |
| 229 |
$nonce_check_failed = false; |
| 230 |
if ( $this->settings['enable_nonce'] ) { |
| 231 |
$nonce_check_failed = ! check_ajax_referer( 'html_forms_submit', '_wpnonce', false ); |
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} |
| 233 |
|
| 234 |
if ( $nonce_check_failed || empty( $_POST['_hf_form_id'] ) ) { |
| 235 |
wp_send_json( |
| 236 |
array( |
| 237 |
'message' => array( |
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'type' => 'warning', |
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'text' => __( 'Something went wrong. Please reload the page and try again.', 'html-forms' ), |
| 240 |
), |
| 241 |
'error' => 'error', |
| 242 |
), |
| 243 |
200 ); |
| 244 |
} |
| 245 |
|
| 246 |
$data = $this->get_request_data(); |
| 247 |
$form_id = (int) $data['_hf_form_id']; |
| 248 |
try { |
| 249 |
$form = hf_get_form( $form_id ); |
| 250 |
} catch ( \Exception $e ) { |
| 251 |
return; |
| 252 |
} |
| 253 |
$error_code = $this->validate_form( $form, $data ); |
| 254 |
$submission = null; |
| 255 |
|
| 256 |
if ( empty( $error_code ) ) { |
| 257 |
/** |
| 258 |
* Filters the field names that should be ignored on the Submission object. |
| 259 |
* Fields starting with an underscore (_) are ignored by default. |
| 260 |
* |
| 261 |
* @param array $names |
| 262 |
*/ |
| 263 |
$ignored_field_names = apply_filters( 'hf_ignored_field_names', array() ); |
| 264 |
|
| 265 |
// filter out ignored field names |
| 266 |
foreach ( $data as $key => $value ) { |
| 267 |
if ( $key[0] === '_' || in_array( $key, $ignored_field_names ) ) { |
| 268 |
unset( $data[ $key ] ); |
| 269 |
continue; |
| 270 |
} |
| 271 |
|
| 272 |
// this detects the WPBruiser token field to ensure it isn't stored |
| 273 |
// CAVEAT: this will detect any non-uppercase string with 2 dashes in the field name and no whitespace in the field value |
| 274 |
if ( class_exists( 'GoodByeCaptcha' ) && is_string( $key ) && is_string( $value ) && strtoupper( $key ) !== $key && substr_count( $key, '-' ) >= 2 && substr_count( trim( $value ), ' ' ) === 0 ) { |
| 275 |
unset( $data[ $key ] ); |
| 276 |
continue; |
| 277 |
} |
| 278 |
} |
| 279 |
|
| 280 |
// sanitize data: strip tags etc. |
| 281 |
$data = $this->sanitize( $data ); |
| 282 |
|
| 283 |
// save form submission |
| 284 |
$submission = new Submission(); |
| 285 |
$submission->form_id = $form_id; |
| 286 |
$submission->data = $data; |
| 287 |
$submission->ip_address = ! empty( $_SERVER['REMOTE_ADDR'] ) ? sanitize_text_field( $_SERVER['REMOTE_ADDR'] ) : ''; |
| 288 |
$submission->user_agent = ! empty( $_SERVER['HTTP_USER_AGENT'] ) ? sanitize_text_field( $_SERVER['HTTP_USER_AGENT'] ) : ''; |
| 289 |
$submission->referer_url = ! empty( $_SERVER['HTTP_REFERER'] ) ? sanitize_url( $_SERVER['HTTP_REFERER'] ) : ''; |
| 290 |
$submission->submitted_at = gmdate( 'Y-m-d H:i:s' ); |
| 291 |
|
| 292 |
// save submission object so that other form processor have an insert ID to work with (eg file upload) |
| 293 |
if ( $form->settings['save_submissions'] ) { |
| 294 |
$submission->save(); |
| 295 |
} |
| 296 |
|
| 297 |
/** |
| 298 |
* General purpose hook that runs before all form actions, so we can still modify the submission object that is passed to actions. |
| 299 |
*/ |
| 300 |
do_action( 'hf_process_form', $form, $submission ); |
| 301 |
|
| 302 |
// re-save submission object for convenience in form processors hooked into hf_process_form |
| 303 |
if ( $form->settings['save_submissions'] ) { |
| 304 |
$submission->save(); |
| 305 |
} |
| 306 |
|
| 307 |
// process form actions |
| 308 |
if ( isset( $form->settings['actions'] ) ) { |
| 309 |
foreach ( $form->settings['actions'] as $action_settings ) { |
| 310 |
/** |
| 311 |
* Processes the specified form action and passes related data. |
| 312 |
* |
| 313 |
* @param array $action_settings |
| 314 |
* @param Submission $submission |
| 315 |
* @param Form $form |
| 316 |
*/ |
| 317 |
do_action( 'hf_process_form_action_' . $action_settings['type'], $action_settings, $submission, $form ); |
| 318 |
} |
| 319 |
} |
| 320 |
|
| 321 |
/** |
| 322 |
* 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. |
| 323 |
* |
| 324 |
* @param Submission $submission |
| 325 |
* @param Form $form |
| 326 |
*/ |
| 327 |
do_action( "hf_form_{$form->slug}_success", $submission, $form ); |
| 328 |
|
| 329 |
/** |
| 330 |
* General purpose hook after all form actions have been processed. |
| 331 |
* |
| 332 |
* @param Submission $submission |
| 333 |
* @param Form $form |
| 334 |
*/ |
| 335 |
do_action( 'hf_form_success', $submission, $form ); |
| 336 |
} else { |
| 337 |
/** |
| 338 |
* General purpose hook for when a form error occurred |
| 339 |
* |
| 340 |
* @param string $error_code |
| 341 |
* @param Form $form |
| 342 |
* @param array $data |
| 343 |
*/ |
| 344 |
do_action( 'hf_form_error', $error_code, $form, $data ); |
| 345 |
} |
| 346 |
|
| 347 |
// Delay response until "wp_loaded" hook to give other plugins a chance to process stuff. |
| 348 |
$response = $this->get_response_for_error_code( $error_code, $form, $data, $submission ); |
| 349 |
wp_send_json( $response, 200 ); |
| 350 |
} |
| 351 |
|
| 352 |
public function listen_for_preview() { |
| 353 |
if ( empty( $_GET['hf_preview_form'] ) || ! current_user_can( 'edit_forms' ) ) { |
| 354 |
return; |
| 355 |
} |
| 356 |
|
| 357 |
try { |
| 358 |
$form = hf_get_form( $_GET['hf_preview_form'] ); |
| 359 |
} catch ( \Exception $e ) { |
| 360 |
return; |
| 361 |
} |
| 362 |
|
| 363 |
show_admin_bar( false ); |
| 364 |
add_filter( 'pre_handle_404', '__return_true' ); |
| 365 |
remove_all_actions( 'template_redirect' ); |
| 366 |
add_action( |
| 367 |
'template_redirect', |
| 368 |
function() use ( $form ) { |
| 369 |
// clear output, some plugin or hooked code might have thrown errors by now. |
| 370 |
if ( ob_get_level() > 0 ) { |
| 371 |
ob_end_clean(); |
| 372 |
} |
| 373 |
|
| 374 |
status_header( 200 ); |
| 375 |
require dirname( $this->plugin_file ) . '/views/form-preview.php'; |
| 376 |
exit; |
| 377 |
} |
| 378 |
); |
| 379 |
} |
| 380 |
|
| 381 |
private function get_response_for_error_code( $error_code, Form $form, $data = array(), ?Submission $submission = null ) { |
| 382 |
// return success response for empty error code string or spam (to trick bots) |
| 383 |
if ( $error_code === '' || $error_code === 'spam' ) { |
| 384 |
$response = array( |
| 385 |
'message' => array( |
| 386 |
'type' => 'success', |
| 387 |
'text' => $form->get_message( 'success' ), |
| 388 |
), |
| 389 |
'hide_form' => (bool) $form->settings['hide_after_success'], |
| 390 |
); |
| 391 |
|
| 392 |
if ( ! empty( $form->settings['redirect_url'] ) && $submission !== null ) { |
| 393 |
$url = hf_replace_data_variables( $form->settings['redirect_url'], $submission, 'urlencode' ); |
| 394 |
|
| 395 |
// Validate the scheme again to prevent javascript: XSS |
| 396 |
$scheme = wp_parse_url( $url, PHP_URL_SCHEME ); |
| 397 |
if ( $scheme === null || in_array( strtolower( $scheme ), array( 'http', 'https' ), true ) ) { |
| 398 |
$response['redirect_url'] = $url; |
| 399 |
} |
| 400 |
} |
| 401 |
|
| 402 |
return apply_filters( 'hf_form_response', $response, $form, $data ); |
| 403 |
} |
| 404 |
|
| 405 |
// get error message |
| 406 |
$message = $form->get_message( $error_code ); |
| 407 |
if ( empty( $message ) ) { |
| 408 |
$message = $form->get_message( 'error' ); |
| 409 |
} |
| 410 |
|
| 411 |
// return error response |
| 412 |
return array( |
| 413 |
'message' => array( |
| 414 |
'type' => 'warning', |
| 415 |
'text' => $message, |
| 416 |
), |
| 417 |
'error' => $error_code, |
| 418 |
); |
| 419 |
} |
| 420 |
|
| 421 |
public function shortcode( $attributes = array(), $content = '' ) { |
| 422 |
if ( empty( $attributes['slug'] ) && empty( $attributes['id'] ) ) { |
| 423 |
return ''; |
| 424 |
} |
| 425 |
|
| 426 |
$slug_or_id = esc_attr( empty( $attributes['id'] ) ? $attributes['slug'] : $attributes['id'] ); |
| 427 |
try { |
| 428 |
$form = hf_get_form( $slug_or_id ); |
| 429 |
} catch ( \Exception $e ) { |
| 430 |
if ( ! current_user_can( 'manage_options' ) ) { |
| 431 |
return $content; |
| 432 |
} |
| 433 |
|
| 434 |
return sprintf( '<p><strong>%s</strong> %s</p>', __( 'Error:', 'html-forms' ), sprintf( __( 'No form found with slug %s', 'html-forms' ), esc_attr( $attributes['slug'] ) ) ); |
| 435 |
} |
| 436 |
|
| 437 |
return $form . $content; |
| 438 |
} |
| 439 |
} |
| 440 |
|
