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index.php
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SubscriberSubscribeController.php
455 lines
| 1 | <?php // phpcs:ignore SlevomatCodingStandard.TypeHints.DeclareStrictTypes.DeclareStrictTypesMissing |
| 2 | |
| 3 | namespace MailPoet\Subscribers; |
| 4 | |
| 5 | if (!defined('ABSPATH')) exit; |
| 6 | |
| 7 | |
| 8 | use MailPoet\Captcha\BehavioralSignals; |
| 9 | use MailPoet\Captcha\CaptchaConstants; |
| 10 | use MailPoet\Captcha\CaptchaSession; |
| 11 | use MailPoet\Captcha\Validator\CaptchaValidator; |
| 12 | use MailPoet\Captcha\Validator\RecaptchaValidator; |
| 13 | use MailPoet\Captcha\Validator\TurnstileValidator; |
| 14 | use MailPoet\Captcha\Validator\ValidationError; |
| 15 | use MailPoet\Entities\FormEntity; |
| 16 | use MailPoet\Entities\SubscriberEntity; |
| 17 | use MailPoet\Entities\SubscriberTagEntity; |
| 18 | use MailPoet\Form\FormsRepository; |
| 19 | use MailPoet\Form\Util\FieldNameObfuscator; |
| 20 | use MailPoet\NotFoundException; |
| 21 | use MailPoet\Segments\SubscribersFinder; |
| 22 | use MailPoet\Settings\SettingsController; |
| 23 | use MailPoet\Statistics\StatisticsFormsRepository; |
| 24 | use MailPoet\Subscription\Throttling as SubscriptionThrottling; |
| 25 | use MailPoet\Tags\TagRepository; |
| 26 | use MailPoet\UnexpectedValueException; |
| 27 | use MailPoet\WP\Functions as WPFunctions; |
| 28 | |
| 29 | class SubscriberSubscribeController { |
| 30 | /** @var FormsRepository */ |
| 31 | private $formsRepository; |
| 32 | |
| 33 | /** @var CaptchaSession */ |
| 34 | private $captchaSession; |
| 35 | |
| 36 | /** @var FieldNameObfuscator */ |
| 37 | private $fieldNameObfuscator; |
| 38 | |
| 39 | /** @var SettingsController */ |
| 40 | private $settings; |
| 41 | |
| 42 | /** @var RequiredCustomFieldValidator */ |
| 43 | private $requiredCustomFieldValidator; |
| 44 | |
| 45 | /** @var SubscriberActions */ |
| 46 | private $subscriberActions; |
| 47 | |
| 48 | /** @var WPFunctions */ |
| 49 | private $wp; |
| 50 | |
| 51 | /** @var SubscriptionThrottling */ |
| 52 | private $throttling; |
| 53 | |
| 54 | /** @var StatisticsFormsRepository */ |
| 55 | private $statisticsFormsRepository; |
| 56 | |
| 57 | /** @var SubscribersFinder */ |
| 58 | private $subscribersFinder; |
| 59 | |
| 60 | /** @var TagRepository */ |
| 61 | private $tagRepository; |
| 62 | |
| 63 | /** @var SubscriberTagRepository */ |
| 64 | private $subscriberTagRepository; |
| 65 | /** @var CaptchaValidator */ |
| 66 | private $builtInCaptchaValidator; |
| 67 | |
| 68 | /** @var RecaptchaValidator */ |
| 69 | private $recaptchaValidator; |
| 70 | |
| 71 | /** @var TurnstileValidator */ |
| 72 | private $turnstileValidator; |
| 73 | |
| 74 | /** @var BehavioralSignals */ |
| 75 | private $behavioralSignals; |
| 76 | |
| 77 | /** @var TrackingConsentCapture */ |
| 78 | private $trackingConsentCapture; |
| 79 | |
| 80 | public function __construct( |
| 81 | CaptchaSession $captchaSession, |
| 82 | SubscriberActions $subscriberActions, |
| 83 | SubscribersFinder $subscribersFinder, |
| 84 | SubscriptionThrottling $throttling, |
| 85 | FieldNameObfuscator $fieldNameObfuscator, |
| 86 | RequiredCustomFieldValidator $requiredCustomFieldValidator, |
| 87 | SettingsController $settings, |
| 88 | FormsRepository $formsRepository, |
| 89 | StatisticsFormsRepository $statisticsFormsRepository, |
| 90 | TagRepository $tagRepository, |
| 91 | SubscriberTagRepository $subscriberTagRepository, |
| 92 | WPFunctions $wp, |
| 93 | CaptchaValidator $builtInCaptchaValidator, |
| 94 | RecaptchaValidator $recaptchaValidator, |
| 95 | TurnstileValidator $turnstileValidator, |
| 96 | BehavioralSignals $behavioralSignals, |
| 97 | TrackingConsentCapture $trackingConsentCapture |
| 98 | ) { |
| 99 | $this->formsRepository = $formsRepository; |
| 100 | $this->captchaSession = $captchaSession; |
| 101 | $this->requiredCustomFieldValidator = $requiredCustomFieldValidator; |
| 102 | $this->fieldNameObfuscator = $fieldNameObfuscator; |
| 103 | $this->settings = $settings; |
| 104 | $this->subscriberActions = $subscriberActions; |
| 105 | $this->subscribersFinder = $subscribersFinder; |
| 106 | $this->wp = $wp; |
| 107 | $this->throttling = $throttling; |
| 108 | $this->statisticsFormsRepository = $statisticsFormsRepository; |
| 109 | $this->tagRepository = $tagRepository; |
| 110 | $this->subscriberTagRepository = $subscriberTagRepository; |
| 111 | $this->builtInCaptchaValidator = $builtInCaptchaValidator; |
| 112 | $this->recaptchaValidator = $recaptchaValidator; |
| 113 | $this->turnstileValidator = $turnstileValidator; |
| 114 | $this->behavioralSignals = $behavioralSignals; |
| 115 | $this->trackingConsentCapture = $trackingConsentCapture; |
| 116 | } |
| 117 | |
| 118 | public function subscribe(array $data): array { |
| 119 | $form = $this->getForm($data); |
| 120 | |
| 121 | if (!empty($data['email'])) { |
| 122 | throw new UnexpectedValueException(__('Please leave the first field empty.', 'mailpoet')); |
| 123 | } |
| 124 | |
| 125 | $captchaSettings = $this->settings->get('captcha'); |
| 126 | $data = $this->initCaptcha($captchaSettings, $form, $data); |
| 127 | $data = $this->deobfuscateFormPayload($data); |
| 128 | |
| 129 | try { |
| 130 | $this->requiredCustomFieldValidator->validate($data, $form); |
| 131 | } catch (\Exception $e) { |
| 132 | throw new UnexpectedValueException($e->getMessage()); |
| 133 | } |
| 134 | |
| 135 | $segmentIds = $this->getSegmentIds($form, $data['segments'] ?? []); |
| 136 | |
| 137 | // Keep `segments` in $data until after CAPTCHA validation so that, if the |
| 138 | // behavioral-baseline path stashes the submission for a deferred challenge, |
| 139 | // the stash still carries the selected segments for the resubmit. |
| 140 | $meta = $this->validateCaptcha($captchaSettings, $data, $form); |
| 141 | if (isset($meta['error'])) { |
| 142 | return $meta; |
| 143 | } |
| 144 | unset($data['segments']); |
| 145 | |
| 146 | $submittedTimeZone = SubscriberEntity::sanitizeTimeZone($data[SubscriberEntity::TIME_ZONE_FIELD_NAME] ?? null); |
| 147 | |
| 148 | // only accept fields defined in the form |
| 149 | $formFieldIds = array_filter(array_map(function (array $formField): ?string { |
| 150 | if (!isset($formField['id'])) { |
| 151 | return null; |
| 152 | } |
| 153 | return is_numeric($formField['id']) ? "cf_{$formField['id']}" : $formField['id']; |
| 154 | }, $form->getBlocksByTypes(FormEntity::FORM_FIELD_TYPES))); |
| 155 | $data = array_intersect_key($data, array_flip($formFieldIds)); |
| 156 | if ($submittedTimeZone !== null) { |
| 157 | $data[SubscriberEntity::TIME_ZONE_FIELD_NAME] = $submittedTimeZone; |
| 158 | } |
| 159 | // The consent checkbox posts a bare 1/0. Translate it and stamp the proof |
| 160 | // server-side, then drop the raw field and any client-supplied proof so a |
| 161 | // crafted post cannot set a consent state or forge the record of it. |
| 162 | $trackingConsentData = $this->getTrackingConsentData($data, $form); |
| 163 | unset( |
| 164 | $data[TrackingConsentCapture::FIELD_ID], |
| 165 | $data['tracking_consent_method'], |
| 166 | $data['tracking_consent_copy'] |
| 167 | ); |
| 168 | foreach ($trackingConsentData as $consentKey => $consentValue) { |
| 169 | $data[$consentKey] = $consentValue; |
| 170 | } |
| 171 | |
| 172 | // make sure we don't allow too many subscriptions with the same ip address |
| 173 | $timeout = $this->throttling->throttle(); |
| 174 | |
| 175 | if ($timeout > 0) { |
| 176 | $timeToWait = $this->throttling->secondsToTimeString($timeout); |
| 177 | $meta['refresh_captcha'] = true; |
| 178 | // translators: %s is the amount of time the user has to wait. |
| 179 | $meta['error'] = sprintf(__('You need to wait %s before subscribing again.', 'mailpoet'), $timeToWait); |
| 180 | return $meta; |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * Fires before a subscription gets created. |
| 185 | * To interrupt the subscription process, you can throw an MailPoet\Exception. |
| 186 | * The error message will then be displayed to the user. |
| 187 | * |
| 188 | * @param array $data The subscription data. |
| 189 | * @param array $segmentIds The segment IDs the user gets subscribed to. |
| 190 | * @param FormEntity $form The form the user used to subscribe. |
| 191 | */ |
| 192 | $this->wp->doAction('mailpoet_subscription_before_subscribe', $data, $segmentIds, $form); |
| 193 | |
| 194 | [$subscriber, $subscriptionMeta] = $this->subscriberActions->subscribe($data, $segmentIds); |
| 195 | |
| 196 | if ( |
| 197 | isset($data['captcha_session_id']) && ( |
| 198 | ($captchaSettings['type'] ?? null) === CaptchaConstants::TYPE_BUILTIN |
| 199 | || CaptchaConstants::isDisabled($captchaSettings['type'] ?? null) |
| 200 | ) |
| 201 | ) { |
| 202 | // Captcha has been verified, invalidate the session vars |
| 203 | $this->captchaSession->reset($data['captcha_session_id']); |
| 204 | } |
| 205 | |
| 206 | // record form statistics |
| 207 | $this->statisticsFormsRepository->record($form, $subscriber); |
| 208 | |
| 209 | // add tags to subscriber if they are filled |
| 210 | $formSettings = $form->getSettings(); |
| 211 | $this->addTagsToSubscriber($formSettings['tags'] ?? [], $subscriber); |
| 212 | |
| 213 | // Confirmation email failed. We want to show the error message |
| 214 | if ($subscriptionMeta['confirmationEmailResult'] instanceof \Exception) { |
| 215 | $meta['error'] = $subscriptionMeta['confirmationEmailResult']->getMessage(); |
| 216 | return $meta; |
| 217 | } |
| 218 | if (!empty($subscriptionMeta['error'])) { |
| 219 | $meta['error'] = $subscriptionMeta['error']; |
| 220 | return $meta; |
| 221 | } |
| 222 | |
| 223 | $this->wp->doAction('mailpoet_subscription_after_subscribe', $subscriber, $data, $segmentIds, $form); |
| 224 | |
| 225 | if (!empty($formSettings['on_success'])) { |
| 226 | if ($formSettings['on_success'] === 'page') { |
| 227 | // redirect to a page on a success, pass the page url in the meta |
| 228 | $meta['redirect_url'] = $this->wp->getPermalink($formSettings['success_page']); |
| 229 | } else if ($formSettings['on_success'] === 'url') { |
| 230 | $meta['redirect_url'] = $formSettings['success_url']; |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | return $meta; |
| 235 | } |
| 236 | |
| 237 | /** |
| 238 | * Turns the form's tracking-consent checkbox into a consent record. |
| 239 | * |
| 240 | * The posted value is a bare 1/0, so it is translated here and the proof of |
| 241 | * how and against what wording consent was given is stamped server-side — |
| 242 | * the same shape Manage.php uses for the manage-subscription page. The raw |
| 243 | * field never reaches the subscriber data, so a crafted post cannot set a |
| 244 | * consent state directly. |
| 245 | * |
| 246 | * @param array<string, mixed> $data |
| 247 | * @return array<string, string> |
| 248 | */ |
| 249 | private function getTrackingConsentData(array $data, FormEntity $form): array { |
| 250 | if (!array_key_exists(TrackingConsentCapture::FIELD_ID, $data)) { |
| 251 | return []; |
| 252 | } |
| 253 | |
| 254 | $email = $data['email'] ?? null; |
| 255 | $method = SubscriberEntity::TRACKING_CONSENT_METHOD_FORM; |
| 256 | |
| 257 | return $this->trackingConsentCapture->getConsentData( |
| 258 | (bool)$data[TrackingConsentCapture::FIELD_ID], |
| 259 | $method, |
| 260 | $this->trackingConsentCapture->getCopy($method, $this->getFormConsentCopy($form)), |
| 261 | $this->trackingConsentCapture->isNewSubscriber(is_string($email) ? $email : null) |
| 262 | ); |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * The wording the form actually shows next to its consent checkbox, so the |
| 267 | * stored proof matches what the subscriber read. |
| 268 | */ |
| 269 | private function getFormConsentCopy(FormEntity $form): ?string { |
| 270 | foreach ($form->getBlocksByTypes([FormEntity::CHECKBOX_BLOCK_TYPE]) as $block) { |
| 271 | if (($block['id'] ?? null) !== TrackingConsentCapture::FIELD_ID) { |
| 272 | continue; |
| 273 | } |
| 274 | $value = $block['params']['values'][0]['value'] ?? null; |
| 275 | return is_string($value) ? $value : null; |
| 276 | } |
| 277 | return null; |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * Checks if the subscriber is subscribed to any segments in the form |
| 282 | * |
| 283 | * @param FormEntity $form The form entity |
| 284 | * @param SubscriberEntity $subscriber The subscriber entity |
| 285 | * @return bool True if the subscriber is subscribed to any of the segments in the form |
| 286 | */ |
| 287 | public function isSubscribedToAnyFormSegments(FormEntity $form, SubscriberEntity $subscriber): bool { |
| 288 | $formSegments = array_merge($form->getSegmentBlocksSegmentIds(), $form->getSettingsSegmentIds()); |
| 289 | |
| 290 | $subscribersFound = $this->subscribersFinder->findSubscribersInSegments([$subscriber->getId()], $formSegments); |
| 291 | if (!empty($subscribersFound)) return true; |
| 292 | |
| 293 | return false; |
| 294 | } |
| 295 | |
| 296 | private function deobfuscateFormPayload($data): array { |
| 297 | return $this->fieldNameObfuscator->deobfuscateFormPayload($data); |
| 298 | } |
| 299 | |
| 300 | private function initCaptcha(?array $captchaSettings, FormEntity $form, array $data): array { |
| 301 | $type = $captchaSettings['type'] ?? null; |
| 302 | |
| 303 | if ($type === CaptchaConstants::TYPE_BUILTIN) { |
| 304 | // When serving the built-in CAPTCHA for the first time, generate a new session ID. |
| 305 | if (!isset($data['captcha_session_id'])) { |
| 306 | $data['captcha_session_id'] = $this->captchaSession->generateSessionId(); |
| 307 | } |
| 308 | $sessionId = $data['captcha_session_id']; |
| 309 | |
| 310 | if (!isset($data['captcha'])) { |
| 311 | // Save form data to session |
| 312 | $this->captchaSession->setFormData($sessionId, array_merge($data, ['form_id' => $form->getId()])); |
| 313 | } elseif ($this->captchaSession->getFormData($sessionId)) { |
| 314 | // Restore form data from session, but keep the current request's captcha |
| 315 | // and behavioral signals so the resubmit reflects accumulated interaction |
| 316 | // rather than the (possibly bot-like) snapshot from the first submit. |
| 317 | $preserve = ['captcha' => $data['captcha']]; |
| 318 | if (isset($data[BehavioralSignals::FIELD_NAME])) { |
| 319 | $preserve[BehavioralSignals::FIELD_NAME] = $data[BehavioralSignals::FIELD_NAME]; |
| 320 | } |
| 321 | $data = array_merge($this->captchaSession->getFormData($sessionId), $preserve); |
| 322 | } |
| 323 | return $data; |
| 324 | } |
| 325 | |
| 326 | // Disabled with behavioral baseline: restore stashed form data on resubmit |
| 327 | // (after a previous behavioral escalation). The first submit stashes inside |
| 328 | // the escalation path; here we only handle the restore side. |
| 329 | if ( |
| 330 | CaptchaConstants::isDisabled($type) |
| 331 | && isset($data['captcha_session_id'], $data['captcha']) |
| 332 | ) { |
| 333 | $stashed = $this->captchaSession->getFormData($data['captcha_session_id']); |
| 334 | if (is_array($stashed)) { |
| 335 | // Keep the current request's behavioral signals over the stash so the |
| 336 | // resubmit's signal check reflects accumulated interaction, not the |
| 337 | // (possibly bot-like) snapshot that triggered the original challenge. |
| 338 | $preserve = [ |
| 339 | 'captcha' => $data['captcha'], |
| 340 | 'captcha_session_id' => $data['captcha_session_id'], |
| 341 | ]; |
| 342 | if (isset($data[BehavioralSignals::FIELD_NAME])) { |
| 343 | $preserve[BehavioralSignals::FIELD_NAME] = $data[BehavioralSignals::FIELD_NAME]; |
| 344 | } |
| 345 | $data = array_merge($stashed, $preserve); |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | return $data; |
| 350 | } |
| 351 | |
| 352 | private function validateCaptcha($captchaSettings, $data, FormEntity $form): array { |
| 353 | $type = $captchaSettings['type'] ?? null; |
| 354 | try { |
| 355 | if (CaptchaConstants::isDisabled($type)) { |
| 356 | $this->enforceBehavioralBaseline($data, $form); |
| 357 | return []; |
| 358 | } |
| 359 | if ($type === CaptchaConstants::TYPE_BUILTIN) { |
| 360 | $this->builtInCaptchaValidator->validate($data); |
| 361 | $this->requireHumanSignals($data, $form); |
| 362 | } |
| 363 | if (CaptchaConstants::isReCaptcha($type)) { |
| 364 | $this->recaptchaValidator->validate($data); |
| 365 | } |
| 366 | if (CaptchaConstants::isTurnstile($type)) { |
| 367 | $this->turnstileValidator->validate($data); |
| 368 | } |
| 369 | } catch (ValidationError $error) { |
| 370 | return $error->getMeta(); |
| 371 | } |
| 372 | return []; |
| 373 | } |
| 374 | |
| 375 | /** |
| 376 | * Baseline protection when no CAPTCHA is configured: behavioral signals must |
| 377 | * look human, otherwise escalate to the built-in CAPTCHA inline challenge. |
| 378 | * isRequired()'s IP-history heuristic is intentionally bypassed here — the |
| 379 | * decision is made on per-submission signals, not on the IP's CAPTCHA history. |
| 380 | * On resubmit (after a previous escalation), signals are re-checked so that |
| 381 | * solving the CAPTCHA alone isn't enough to bypass the baseline. |
| 382 | */ |
| 383 | private function enforceBehavioralBaseline(array $data, FormEntity $form): void { |
| 384 | if (!empty($data['captcha_session_id'])) { |
| 385 | $this->builtInCaptchaValidator->validateChallenge($data); |
| 386 | } |
| 387 | $this->requireHumanSignals($data, $form); |
| 388 | } |
| 389 | |
| 390 | /** |
| 391 | * Throws a fresh CAPTCHA challenge unless behavioral signals look human. |
| 392 | * Admin/editor exempt. The suspect signals are dropped from the stash so the |
| 393 | * resubmit is evaluated on the current request's freshest counters (via |
| 394 | * initCaptcha's preserve step). |
| 395 | */ |
| 396 | private function requireHumanSignals(array $data, FormEntity $form): void { |
| 397 | if ($this->builtInCaptchaValidator->isUserExemptFromCaptcha()) { |
| 398 | return; |
| 399 | } |
| 400 | if ($this->behavioralSignals->looksHuman($data)) { |
| 401 | return; |
| 402 | } |
| 403 | $stash = array_merge($data, ['form_id' => $form->getId()]); |
| 404 | unset($stash[BehavioralSignals::FIELD_NAME]); |
| 405 | $challenge = $this->builtInCaptchaValidator->getInlineCaptchaChallenge($stash); |
| 406 | throw new ValidationError(__('Please fill in the CAPTCHA.', 'mailpoet'), $challenge); |
| 407 | } |
| 408 | |
| 409 | private function getSegmentIds(FormEntity $form, array $segmentIds): array { |
| 410 | |
| 411 | // If form contains segment selection blocks allow only segments ids configured in those blocks |
| 412 | $segmentBlocksSegmentIds = $form->getSegmentBlocksSegmentIds(); |
| 413 | if (!empty($segmentBlocksSegmentIds)) { |
| 414 | $segmentIds = array_intersect($segmentIds, $segmentBlocksSegmentIds); |
| 415 | } else { |
| 416 | $segmentIds = $form->getSettingsSegmentIds(); |
| 417 | } |
| 418 | |
| 419 | if (empty($segmentIds)) { |
| 420 | throw new UnexpectedValueException(__('Please select a list.', 'mailpoet')); |
| 421 | } |
| 422 | |
| 423 | return $segmentIds; |
| 424 | } |
| 425 | |
| 426 | private function getForm(array $data): FormEntity { |
| 427 | $formId = (isset($data['form_id']) ? (int)$data['form_id'] : false); |
| 428 | $form = $this->formsRepository->findOneById($formId); |
| 429 | |
| 430 | if (!$form) { |
| 431 | throw new NotFoundException(__('Please specify a valid form ID.', 'mailpoet')); |
| 432 | } |
| 433 | |
| 434 | return $form; |
| 435 | } |
| 436 | |
| 437 | /** |
| 438 | * @param string[] $tagNames |
| 439 | */ |
| 440 | private function addTagsToSubscriber(array $tagNames, SubscriberEntity $subscriber): void { |
| 441 | foreach ($tagNames as $tagName) { |
| 442 | $tag = $this->tagRepository->createOrUpdate(['name' => $tagName]); |
| 443 | |
| 444 | $subscriberTag = $subscriber->getSubscriberTag($tag); |
| 445 | if (!$subscriberTag) { |
| 446 | $subscriberTag = new SubscriberTagEntity($tag, $subscriber); |
| 447 | $subscriber->getSubscriberTags()->add($subscriberTag); |
| 448 | $this->subscriberTagRepository->persist($subscriberTag); |
| 449 | $this->subscriberTagRepository->flush(); |
| 450 | $this->wp->doAction('mailpoet_subscriber_tag_added', $subscriberTag); |
| 451 | } |
| 452 | } |
| 453 | } |
| 454 | } |
| 455 |