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class-form-field-validator.php
668 lines
| 1 | <?php |
| 2 | |
| 3 | namespace SuperbAddons\Gutenberg\Form; |
| 4 | |
| 5 | defined('ABSPATH') || exit(); |
| 6 | |
| 7 | class FormFieldValidator |
| 8 | { |
| 9 | /** |
| 10 | * Validate submitted fields against server-side form config. |
| 11 | * |
| 12 | * @param array $submitted_fields field_id => value from submission |
| 13 | * @param array $form_fields_config Array of field attribute arrays from form config |
| 14 | * @param string $default_required_message Form-wide message for empty required fields, '' for the localized default |
| 15 | * @return array ('fields' => cleaned fields, 'errors' => field_id => error message) |
| 16 | */ |
| 17 | public static function Validate($submitted_fields, $form_fields_config, $default_required_message = '') |
| 18 | { |
| 19 | // Build lookup: fieldId => config |
| 20 | $config_lookup = array(); |
| 21 | foreach ($form_fields_config as $field_def) { |
| 22 | if (isset($field_def['fieldId']) && $field_def['fieldId'] !== '') { |
| 23 | $config_lookup[$field_def['fieldId']] = $field_def; |
| 24 | } |
| 25 | } |
| 26 | |
| 27 | $cleaned = array(); |
| 28 | $errors = array(); |
| 29 | |
| 30 | // Only accept known field IDs |
| 31 | foreach ($submitted_fields as $key => $value) { |
| 32 | if (isset($config_lookup[$key])) { |
| 33 | $cleaned[$key] = $value; |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | // Validate each configured field |
| 38 | foreach ($config_lookup as $field_id => $field_config) { |
| 39 | $field_type = isset($field_config['fieldType']) ? $field_config['fieldType'] : 'text'; |
| 40 | |
| 41 | // Hidden fields: override with server-side default, skip validation |
| 42 | if ($field_type === 'hidden') { |
| 43 | $cleaned[$field_id] = isset($field_config['defaultValue']) ? $field_config['defaultValue'] : ''; |
| 44 | continue; |
| 45 | } |
| 46 | |
| 47 | // File fields: validate via FormFileHandler (separate from text validation) |
| 48 | if ($field_type === 'file') { |
| 49 | $file_error = FormFileHandler::ValidateFiles($field_config, $default_required_message); |
| 50 | if ($file_error !== '') { |
| 51 | $errors[$field_id] = $file_error; |
| 52 | } |
| 53 | // Remove file field from text fields — files are handled separately |
| 54 | unset($cleaned[$field_id]); |
| 55 | continue; |
| 56 | } |
| 57 | |
| 58 | $value = isset($cleaned[$field_id]) ? $cleaned[$field_id] : ''; |
| 59 | $required = !empty($field_config['required']); |
| 60 | |
| 61 | // Conditional logic: if field has active rules and was not submitted, skip required check |
| 62 | if ($required && $value === '' && self::HasConditionalLogic($field_config)) { |
| 63 | continue; |
| 64 | } |
| 65 | |
| 66 | $error = self::ValidateField($value, $field_config, $default_required_message); |
| 67 | |
| 68 | /** |
| 69 | * Filter the validation error for a field. |
| 70 | * Allows premium plugin to add custom validation for new field types. |
| 71 | * |
| 72 | * @param string $error Error message, empty if valid. |
| 73 | * @param string $value Submitted field value. |
| 74 | * @param array $field_config Field configuration from server-side config. |
| 75 | */ |
| 76 | $error = apply_filters('superbaddons_form_validate_field', $error, $value, $field_config); |
| 77 | |
| 78 | if ($error !== '') { |
| 79 | $errors[$field_id] = $error; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | return array( |
| 84 | 'fields' => $cleaned, |
| 85 | 'errors' => $errors, |
| 86 | ); |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Validate a single field value against its config. |
| 91 | * |
| 92 | * @param string $value Submitted value |
| 93 | * @param array $config Field config array |
| 94 | * @param string $default_required_message Form-wide message for empty required fields, '' for the localized default |
| 95 | * @return string Error message, empty if valid |
| 96 | */ |
| 97 | private static function ValidateField($value, $config, $default_required_message = '') |
| 98 | { |
| 99 | $field_type = isset($config['fieldType']) ? $config['fieldType'] : 'text'; |
| 100 | $required = !empty($config['required']); |
| 101 | |
| 102 | // Required check |
| 103 | if ($required && ($value === '' || $value === null)) { |
| 104 | return self::GetRequiredMessage($config, $default_required_message); |
| 105 | } |
| 106 | |
| 107 | // Skip further validation if empty and not required |
| 108 | if ($value === '' || $value === null) { |
| 109 | return ''; |
| 110 | } |
| 111 | |
| 112 | // Dispatch by field type |
| 113 | switch ($field_type) { |
| 114 | case 'text': |
| 115 | case 'phone': |
| 116 | return self::ValidateTextLike($value, $config); |
| 117 | |
| 118 | case 'email': |
| 119 | return self::ValidateEmail($value, $config); |
| 120 | |
| 121 | case 'url': |
| 122 | return self::ValidateUrl($value, $config); |
| 123 | |
| 124 | case 'textarea': |
| 125 | return self::ValidateTextarea($value, $config); |
| 126 | |
| 127 | case 'number': |
| 128 | return self::ValidateNumber($value, $config); |
| 129 | |
| 130 | case 'select': |
| 131 | case 'radio': |
| 132 | return self::ValidateSingleOption($value, $config); |
| 133 | |
| 134 | case 'checkbox': |
| 135 | return self::ValidateCheckbox($value, $config); |
| 136 | |
| 137 | case 'consent': |
| 138 | // Only the fixed marker value is legitimate ("Checked" — kept |
| 139 | // in English so stored submissions and exports are stable |
| 140 | // across locales). Anything else is a forged submission. |
| 141 | return $value === 'Checked' ? '' : __('Invalid selection.', 'superb-blocks'); |
| 142 | |
| 143 | case 'date': |
| 144 | return self::ValidateDate($value, $config); |
| 145 | |
| 146 | case 'time': |
| 147 | return self::ValidateTime($value, $config); |
| 148 | |
| 149 | case 'rating': |
| 150 | return self::ValidateRating($value, $config); |
| 151 | |
| 152 | case 'calculated': |
| 153 | // Calculated fields are validated by server-side recalculation (see FormController) |
| 154 | return ''; |
| 155 | |
| 156 | case 'slider': |
| 157 | return self::ValidateSlider($value, $config); |
| 158 | |
| 159 | case 'signature': |
| 160 | return self::ValidateSignature($value); |
| 161 | |
| 162 | case 'colorpicker': |
| 163 | return self::ValidateColor($value); |
| 164 | |
| 165 | default: |
| 166 | return ''; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * Validate text-like fields (text, phone): length + pattern. |
| 172 | */ |
| 173 | private static function ValidateTextLike($value, $config) |
| 174 | { |
| 175 | $error = self::CheckLength($value, $config); |
| 176 | if ($error !== '') { |
| 177 | return $error; |
| 178 | } |
| 179 | |
| 180 | return self::CheckPattern($value, $config); |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * Validate email: length + pattern + is_email(). |
| 185 | */ |
| 186 | private static function ValidateEmail($value, $config) |
| 187 | { |
| 188 | $error = self::CheckLength($value, $config); |
| 189 | if ($error !== '') { |
| 190 | return $error; |
| 191 | } |
| 192 | |
| 193 | $error = self::CheckPattern($value, $config); |
| 194 | if ($error !== '') { |
| 195 | return $error; |
| 196 | } |
| 197 | |
| 198 | if (!is_email($value)) { |
| 199 | return __('Please enter a valid email address.', 'superb-blocks'); |
| 200 | } |
| 201 | |
| 202 | return ''; |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * Validate URL: length + pattern + esc_url_raw check. |
| 207 | */ |
| 208 | private static function ValidateUrl($value, $config) |
| 209 | { |
| 210 | $error = self::CheckLength($value, $config); |
| 211 | if ($error !== '') { |
| 212 | return $error; |
| 213 | } |
| 214 | |
| 215 | $error = self::CheckPattern($value, $config); |
| 216 | if ($error !== '') { |
| 217 | return $error; |
| 218 | } |
| 219 | |
| 220 | if (esc_url_raw($value) === '') { |
| 221 | return __('Please enter a valid URL.', 'superb-blocks'); |
| 222 | } |
| 223 | |
| 224 | return ''; |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * Validate textarea: length only (no pattern per field type spec). |
| 229 | */ |
| 230 | private static function ValidateTextarea($value, $config) |
| 231 | { |
| 232 | return self::CheckLength($value, $config); |
| 233 | } |
| 234 | |
| 235 | /** |
| 236 | * Validate number: is_numeric + min/max value. |
| 237 | */ |
| 238 | private static function ValidateNumber($value, $config) |
| 239 | { |
| 240 | if (!is_numeric($value)) { |
| 241 | return __('Please enter a valid number.', 'superb-blocks'); |
| 242 | } |
| 243 | |
| 244 | $num = floatval($value); |
| 245 | |
| 246 | $min = isset($config['minValue']) ? $config['minValue'] : null; |
| 247 | $max = isset($config['maxValue']) ? $config['maxValue'] : null; |
| 248 | |
| 249 | if ($min !== null && $min !== '' && $num < floatval($min)) { |
| 250 | /* translators: %s: minimum allowed numeric value */ |
| 251 | return sprintf(__('Minimum value is %s.', 'superb-blocks'), $min); |
| 252 | } |
| 253 | |
| 254 | if ($max !== null && $max !== '' && $num > floatval($max)) { |
| 255 | /* translators: %s: maximum allowed numeric value */ |
| 256 | return sprintf(__('Maximum value is %s.', 'superb-blocks'), $max); |
| 257 | } |
| 258 | |
| 259 | return ''; |
| 260 | } |
| 261 | |
| 262 | /** |
| 263 | * Validate select/radio: value must be in configured options. |
| 264 | */ |
| 265 | private static function ValidateSingleOption($value, $config) |
| 266 | { |
| 267 | $options = isset($config['options']) && is_array($config['options']) ? $config['options'] : array(); |
| 268 | $allowed = array(); |
| 269 | foreach ($options as $opt) { |
| 270 | if (isset($opt['value'])) { |
| 271 | $allowed[] = $opt['value']; |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | if (!in_array($value, $allowed, true)) { |
| 276 | return __('Invalid selection.', 'superb-blocks'); |
| 277 | } |
| 278 | |
| 279 | return ''; |
| 280 | } |
| 281 | |
| 282 | /** |
| 283 | * Validate checkbox: comma-separated values, each must be in configured options. |
| 284 | */ |
| 285 | private static function ValidateCheckbox($value, $config) |
| 286 | { |
| 287 | $options = isset($config['options']) && is_array($config['options']) ? $config['options'] : array(); |
| 288 | $allowed = array(); |
| 289 | foreach ($options as $opt) { |
| 290 | if (isset($opt['value'])) { |
| 291 | $allowed[] = $opt['value']; |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | // Client sends checkbox values as "Value A, Value B" |
| 296 | $selected = array_map('trim', explode(',', $value)); |
| 297 | foreach ($selected as $sel) { |
| 298 | if ($sel !== '' && !in_array($sel, $allowed, true)) { |
| 299 | return __('Invalid selection.', 'superb-blocks'); |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | return ''; |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * Validate date: format + constraints (future/past/range) + excludeDays. |
| 308 | */ |
| 309 | private static function ValidateDate($value, $config) |
| 310 | { |
| 311 | // Validate format YYYY-MM-DD |
| 312 | if (!preg_match('/^\d{4}-\d{2}-\d{2}$/', $value)) { |
| 313 | return __('Invalid date format.', 'superb-blocks'); |
| 314 | } |
| 315 | |
| 316 | $parts = explode('-', $value); |
| 317 | if (!checkdate(intval($parts[1]), intval($parts[2]), intval($parts[0]))) { |
| 318 | return __('Invalid date.', 'superb-blocks'); |
| 319 | } |
| 320 | |
| 321 | $ds = isset($config['dateSettings']) && is_array($config['dateSettings']) ? $config['dateSettings'] : array(); |
| 322 | $constraint = isset($ds['dateConstraint']) ? $ds['dateConstraint'] : 'none'; |
| 323 | if ($constraint === 'none') { |
| 324 | return ''; |
| 325 | } |
| 326 | |
| 327 | $custom_msg = isset($ds['dateTimeMessage']) && $ds['dateTimeMessage'] !== '' |
| 328 | ? $ds['dateTimeMessage'] |
| 329 | : ''; |
| 330 | |
| 331 | // Resolve min/max dates using site timezone (matches client behavior) |
| 332 | $today = current_time('Y-m-d'); |
| 333 | $min_date = null; |
| 334 | $max_date = null; |
| 335 | |
| 336 | if ($constraint === 'future') { |
| 337 | $min_date = $today; |
| 338 | } elseif ($constraint === 'past') { |
| 339 | $max_date = $today; |
| 340 | } elseif ($constraint === 'range') { |
| 341 | $resolved = self::ResolveDateRange($ds, $today); |
| 342 | $min_date = $resolved['min']; |
| 343 | $max_date = $resolved['max']; |
| 344 | } |
| 345 | |
| 346 | if ($min_date !== null && $value < $min_date) { |
| 347 | if ($custom_msg !== '') { |
| 348 | return $custom_msg; |
| 349 | } |
| 350 | /* translators: %s: earliest allowed date in Y-m-d format */ |
| 351 | return sprintf(__('Please select a date on or after %s.', 'superb-blocks'), $min_date); |
| 352 | } |
| 353 | |
| 354 | if ($max_date !== null && $value > $max_date) { |
| 355 | if ($custom_msg !== '') { |
| 356 | return $custom_msg; |
| 357 | } |
| 358 | /* translators: %s: latest allowed date in Y-m-d format */ |
| 359 | return sprintf(__('Please select a date on or before %s.', 'superb-blocks'), $max_date); |
| 360 | } |
| 361 | |
| 362 | // Exclude days |
| 363 | $exclude_days = isset($ds['excludeDays']) && is_array($ds['excludeDays']) ? $ds['excludeDays'] : array(); |
| 364 | if (!empty($exclude_days)) { |
| 365 | $timestamp = strtotime($value . ' UTC'); |
| 366 | if ($timestamp !== false) { |
| 367 | $day_of_week = intval(gmdate('w', $timestamp)); // 0 = Sunday |
| 368 | if (in_array($day_of_week, array_map('intval', $exclude_days), true)) { |
| 369 | if ($custom_msg !== '') { |
| 370 | return $custom_msg; |
| 371 | } |
| 372 | return __('The selected day of the week is not allowed.', 'superb-blocks'); |
| 373 | } |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | return ''; |
| 378 | } |
| 379 | |
| 380 | /** |
| 381 | * Resolve min/max date for range constraint. |
| 382 | * Mirrors JS initDateConstraints() in form.js. |
| 383 | * |
| 384 | * @param array $config Field config |
| 385 | * @param string $today Today's date in Y-m-d |
| 386 | * @return array ('min' => string|null, 'max' => string|null) |
| 387 | */ |
| 388 | private static function ResolveDateRange($config, $today) |
| 389 | { |
| 390 | $min_date_mode = isset($config['minDateMode']) ? $config['minDateMode'] : 'none'; |
| 391 | $max_date_mode = isset($config['maxDateMode']) ? $config['maxDateMode'] : 'none'; |
| 392 | $min_date = null; |
| 393 | $max_date = null; |
| 394 | |
| 395 | // First pass: resolve independent dates (specific and relative) |
| 396 | if ($min_date_mode === 'specific') { |
| 397 | $min_date = isset($config['minDate']) && $config['minDate'] !== '' ? $config['minDate'] : null; |
| 398 | } elseif ($min_date_mode === 'relative') { |
| 399 | $offset = isset($config['minDateOffset']) ? intval($config['minDateOffset']) : 0; |
| 400 | $min_date = self::OffsetDate($today, $offset); |
| 401 | } |
| 402 | |
| 403 | if ($max_date_mode === 'specific') { |
| 404 | $max_date = isset($config['maxDate']) && $config['maxDate'] !== '' ? $config['maxDate'] : null; |
| 405 | } elseif ($max_date_mode === 'relative') { |
| 406 | $offset = isset($config['maxDateOffset']) ? intval($config['maxDateOffset']) : 0; |
| 407 | $max_date = self::OffsetDate($today, $offset); |
| 408 | } |
| 409 | |
| 410 | // Second pass: resolve offsets that depend on the other date |
| 411 | if ($max_date_mode === 'offset') { |
| 412 | $offset = isset($config['maxDateOffset']) ? intval($config['maxDateOffset']) : 0; |
| 413 | $base = $min_date !== null ? $min_date : $today; |
| 414 | $max_date = self::OffsetDate($base, $offset); |
| 415 | } |
| 416 | |
| 417 | if ($min_date_mode === 'offset') { |
| 418 | $offset = isset($config['minDateOffset']) ? intval($config['minDateOffset']) : 0; |
| 419 | $base = $max_date !== null ? $max_date : $today; |
| 420 | $min_date = self::OffsetDate($base, -$offset); |
| 421 | } |
| 422 | |
| 423 | return array('min' => $min_date, 'max' => $max_date); |
| 424 | } |
| 425 | |
| 426 | /** |
| 427 | * Add days offset to a date string. |
| 428 | * |
| 429 | * @param string $date Y-m-d format |
| 430 | * @param int $days Number of days (can be negative) |
| 431 | * @return string Y-m-d |
| 432 | */ |
| 433 | private static function OffsetDate($date, $days) |
| 434 | { |
| 435 | $sign = $days >= 0 ? '+' : ''; |
| 436 | $ts = strtotime($date . ' UTC ' . $sign . $days . ' days'); |
| 437 | return $ts !== false ? gmdate('Y-m-d', $ts) : $date; |
| 438 | } |
| 439 | |
| 440 | /** |
| 441 | * Validate time: format + min/max constraints. |
| 442 | */ |
| 443 | private static function ValidateTime($value, $config) |
| 444 | { |
| 445 | // Validate format HH:MM |
| 446 | if (!preg_match('/^\d{2}:\d{2}$/', $value)) { |
| 447 | return __('Invalid time format.', 'superb-blocks'); |
| 448 | } |
| 449 | |
| 450 | $ts = isset($config['timeSettings']) && is_array($config['timeSettings']) ? $config['timeSettings'] : array(); |
| 451 | |
| 452 | $custom_msg = isset($ts['dateTimeMessage']) && $ts['dateTimeMessage'] !== '' |
| 453 | ? $ts['dateTimeMessage'] |
| 454 | : ''; |
| 455 | |
| 456 | $min_time = isset($ts['minTime']) && $ts['minTime'] !== '' ? $ts['minTime'] : null; |
| 457 | $max_time = isset($ts['maxTime']) && $ts['maxTime'] !== '' ? $ts['maxTime'] : null; |
| 458 | |
| 459 | // HH:MM string comparison is lexicographically correct |
| 460 | if ($min_time !== null && $value < $min_time) { |
| 461 | if ($custom_msg !== '') { |
| 462 | return $custom_msg; |
| 463 | } |
| 464 | /* translators: %s: earliest allowed time in HH:MM format */ |
| 465 | return sprintf(__('Please select a time at or after %s.', 'superb-blocks'), $min_time); |
| 466 | } |
| 467 | |
| 468 | if ($max_time !== null && $value > $max_time) { |
| 469 | if ($custom_msg !== '') { |
| 470 | return $custom_msg; |
| 471 | } |
| 472 | /* translators: %s: latest allowed time in HH:MM format */ |
| 473 | return sprintf(__('Please select a time at or before %s.', 'superb-blocks'), $max_time); |
| 474 | } |
| 475 | |
| 476 | return ''; |
| 477 | } |
| 478 | |
| 479 | /** |
| 480 | * Validate signature: must be a valid PNG data URL within size limit. |
| 481 | */ |
| 482 | private static function ValidateSignature($value) |
| 483 | { |
| 484 | // Max 500KB |
| 485 | if (strlen($value) > 500000) { |
| 486 | return __('Signature data is too large.', 'superb-blocks'); |
| 487 | } |
| 488 | |
| 489 | // Must start with PNG data URL prefix |
| 490 | $prefix = 'data:image/png;base64,'; |
| 491 | if (strpos($value, $prefix) !== 0) { |
| 492 | return __('Invalid signature format.', 'superb-blocks'); |
| 493 | } |
| 494 | |
| 495 | // Validate base64 portion |
| 496 | $base64 = substr($value, strlen($prefix)); |
| 497 | if (!preg_match('/^[A-Za-z0-9+\/=]+$/', $base64)) { |
| 498 | return __('Invalid signature data.', 'superb-blocks'); |
| 499 | } |
| 500 | |
| 501 | return ''; |
| 502 | } |
| 503 | |
| 504 | /** |
| 505 | * Validate slider: single numeric value within bounds. |
| 506 | */ |
| 507 | private static function ValidateSlider($value, $config) |
| 508 | { |
| 509 | $ss = isset($config['sliderSettings']) && is_array($config['sliderSettings']) ? $config['sliderSettings'] : array(); |
| 510 | $min = isset($ss['min']) ? floatval($ss['min']) : 0; |
| 511 | $max = isset($ss['max']) ? floatval($ss['max']) : 100; |
| 512 | |
| 513 | if (!is_numeric($value)) { |
| 514 | return __('Please enter a valid number.', 'superb-blocks'); |
| 515 | } |
| 516 | |
| 517 | $num = floatval($value); |
| 518 | if ($num < $min || $num > $max) { |
| 519 | /* translators: 1: minimum allowed value, 2: maximum allowed value */ |
| 520 | return sprintf(__('Value must be between %1$s and %2$s.', 'superb-blocks'), $min, $max); |
| 521 | } |
| 522 | |
| 523 | return ''; |
| 524 | } |
| 525 | |
| 526 | /** |
| 527 | * Validate color: must be a valid hex color. |
| 528 | */ |
| 529 | private static function ValidateColor($value) |
| 530 | { |
| 531 | if (!preg_match('/^#[0-9a-fA-F]{6}$/', $value)) { |
| 532 | return __('Please enter a valid hex color.', 'superb-blocks'); |
| 533 | } |
| 534 | |
| 535 | return ''; |
| 536 | } |
| 537 | |
| 538 | /** |
| 539 | * Validate rating: must be an integer between 0 and maxRating. |
| 540 | */ |
| 541 | private static function ValidateRating($value, $config) |
| 542 | { |
| 543 | if (!is_numeric($value)) { |
| 544 | return __('Invalid rating.', 'superb-blocks'); |
| 545 | } |
| 546 | |
| 547 | $num = intval($value); |
| 548 | if ($num != floatval($value)) { |
| 549 | // Not an integer |
| 550 | return __('Invalid rating.', 'superb-blocks'); |
| 551 | } |
| 552 | |
| 553 | $rs = isset($config['ratingSettings']) && is_array($config['ratingSettings']) ? $config['ratingSettings'] : array(); |
| 554 | $max_rating = isset($rs['maxRating']) ? intval($rs['maxRating']) : 5; |
| 555 | |
| 556 | if ($num < 0 || $num > $max_rating) { |
| 557 | return __('Invalid rating.', 'superb-blocks'); |
| 558 | } |
| 559 | |
| 560 | return ''; |
| 561 | } |
| 562 | |
| 563 | // --- Helper methods --- |
| 564 | |
| 565 | /** |
| 566 | * Check min/max length constraints. |
| 567 | */ |
| 568 | private static function CheckLength($value, $config) |
| 569 | { |
| 570 | $len = function_exists('mb_strlen') ? mb_strlen($value, 'UTF-8') : strlen($value); |
| 571 | |
| 572 | $min = isset($config['minLength']) ? $config['minLength'] : null; |
| 573 | $max = isset($config['maxLength']) ? $config['maxLength'] : null; |
| 574 | |
| 575 | if ($min !== null && $min !== '' && $len < intval($min)) { |
| 576 | /* translators: %d: minimum required character count */ |
| 577 | return sprintf(__('Minimum length is %d characters.', 'superb-blocks'), $min); |
| 578 | } |
| 579 | |
| 580 | if ($max !== null && $max !== '' && $len > intval($max)) { |
| 581 | /* translators: %d: maximum allowed character count */ |
| 582 | return sprintf(__('Maximum length is %d characters.', 'superb-blocks'), $max); |
| 583 | } |
| 584 | |
| 585 | return ''; |
| 586 | } |
| 587 | |
| 588 | /** |
| 589 | * Check regex pattern constraint. |
| 590 | */ |
| 591 | private static function CheckPattern($value, $config) |
| 592 | { |
| 593 | $pattern = isset($config['pattern']) && $config['pattern'] !== '' ? $config['pattern'] : null; |
| 594 | if ($pattern === null) { |
| 595 | return ''; |
| 596 | } |
| 597 | |
| 598 | // Wrap pattern in delimiters for PCRE, using '/' with escaping |
| 599 | $regex = '/' . str_replace('/', '\\/', $pattern) . '/'; |
| 600 | |
| 601 | // Guard against ReDoS from user-supplied patterns by tightening PCRE's backtrack limit around this single preg_match call. ini_set is intentional: there is no WP-API equivalent for runtime PCRE limits, the override is reverted immediately after, and the limit is per-process rather than persistent. |
| 602 | $old_limit = ini_get('pcre.backtrack_limit'); |
| 603 | // phpcs:ignore Squiz.PHP.DiscouragedFunctions.Discouraged |
| 604 | ini_set('pcre.backtrack_limit', 10000); |
| 605 | $result = @preg_match($regex, $value); |
| 606 | // phpcs:ignore Squiz.PHP.DiscouragedFunctions.Discouraged |
| 607 | ini_set('pcre.backtrack_limit', $old_limit); |
| 608 | |
| 609 | // If regex is invalid ($result === false) or doesn't match ($result === 0) |
| 610 | if ($result === 0) { |
| 611 | $msg = isset($config['patternMessage']) && $config['patternMessage'] !== '' |
| 612 | ? $config['patternMessage'] |
| 613 | : __('Invalid format.', 'superb-blocks'); |
| 614 | return $msg; |
| 615 | } |
| 616 | |
| 617 | // Invalid regex or match: pass |
| 618 | return ''; |
| 619 | } |
| 620 | |
| 621 | /** |
| 622 | * Resolve the error message for an empty required field. |
| 623 | * Field-level override wins, then the form-wide default, then the localized fallback. |
| 624 | * Also used by FormFileHandler so file fields resolve identically. |
| 625 | * |
| 626 | * @param array $config Field config array |
| 627 | * @param string $default_required_message Form-wide default, '' when not set |
| 628 | * @return string |
| 629 | */ |
| 630 | public static function GetRequiredMessage($config, $default_required_message = '') |
| 631 | { |
| 632 | if (isset($config['requiredMessage']) && is_string($config['requiredMessage']) && $config['requiredMessage'] !== '') { |
| 633 | return sanitize_text_field($config['requiredMessage']); |
| 634 | } |
| 635 | if (is_string($default_required_message) && $default_required_message !== '') { |
| 636 | return $default_required_message; |
| 637 | } |
| 638 | return __('This field is required.', 'superb-blocks'); |
| 639 | } |
| 640 | |
| 641 | /** |
| 642 | * Check if a field has active conditional logic rules. |
| 643 | */ |
| 644 | private static function HasConditionalLogic($config) |
| 645 | { |
| 646 | if (!isset($config['conditionalLogic']) || !is_array($config['conditionalLogic'])) { |
| 647 | return false; |
| 648 | } |
| 649 | |
| 650 | $logic = $config['conditionalLogic']; |
| 651 | if (!isset($logic['ruleGroups']) || !is_array($logic['ruleGroups'])) { |
| 652 | return false; |
| 653 | } |
| 654 | |
| 655 | foreach ($logic['ruleGroups'] as $group) { |
| 656 | if (isset($group['conditions']) && is_array($group['conditions'])) { |
| 657 | foreach ($group['conditions'] as $cond) { |
| 658 | if (!empty($cond['field'])) { |
| 659 | return true; |
| 660 | } |
| 661 | } |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | return false; |
| 666 | } |
| 667 | } |
| 668 |