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SureDonation – Donation Forms, Fundraising Campaigns & Donor Management / trunk
SureDonation – Donation Forms, Fundraising Campaigns & Donor Management vtrunk
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suredonation / inc / field-validation.php

field-validation.php in SureDonation – Donation Forms, Fundraising Campaigns & Donor Management trunk, at inc/field-validation.php

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1 <?php
2 /**
3 * Field Validation Class
4 *
5 * Handles field validation for SureDonation forms.
6 * Stores block configuration on form save and retrieves it for validation.
7 *
8 * @package SureDonation
9 * @since 0.0.1
10 */
11
12 namespace SureDonation\Inc;
13
14 if ( ! defined( 'ABSPATH' ) ) {
15 exit; // Exit if accessed directly.
16 }
17
18 /**
19 * Field Validation Class
20 */
21 class Field_Validation {
22 /**
23 * Meta key for storing block configuration.
24 *
25 * @since 0.0.1
26 */
27 public const BLOCK_CONFIG_META_KEY = '_suredonation_block_config';
28
29 /**
30 * Key within the consolidated suredonation_options array that stores the
31 * admin-overridden default validation messages (Global Settings → Form
32 * Validation). Per-field messages always take precedence over these.
33 *
34 * @since 1.1.0
35 */
36 public const VALIDATION_MESSAGES_OPTION_KEY = 'validation_messages';
37
38 /**
39 * Canonical stored values for a checkbox field.
40 *
41 * Deliberately untranslated: the value is persisted to donation_data, read
42 * back by the entry screen, the abilities runtime and the CSV export, and can
43 * be re-imported on another site. Display layers translate it on read via
44 * Helper::format_checkbox_field_value(); the export keeps the canonical token
45 * so the column stays comparable across locales.
46 *
47 * @since 1.5.1
48 */
49 public const CHECKBOX_VALUES = [
50 'yes' => 'Yes',
51 'no' => 'No',
52 ];
53
54 /**
55 * Field blocks whose values participate in field-level validation.
56 *
57 * @since 1.1.0
58 */
59 public const VALIDATABLE_BLOCKS = [
60 'suredonation/input',
61 'suredonation/email',
62 'suredonation/number',
63 'suredonation/checkbox',
64 'suredonation/dropdown',
65 'suredonation/phone',
66 'suredonation/url',
67 'suredonation/donor-comment',
68 ];
69
70 /**
71 * Add block configuration for form fields.
72 *
73 * This function processes blocks in a form and stores their configuration as post meta.
74 * It extracts payment block settings (amount type, fixed amount, minimum amount, etc.)
75 * which are used for server-side validation to prevent payment manipulation.
76 *
77 * @param array<mixed> $blocks Array of blocks to process.
78 * @param int $form_id Form post ID.
79 * @return void
80 * @since 0.0.1
81 */
82 public static function add_block_config( $blocks, $form_id ) {
83 // Initialize array to store processed block configurations.
84 $block_config = [];
85
86 // Process blocks recursively.
87 self::process_blocks_recursive( $blocks, $block_config );
88
89 // Only update meta if we have processed configurations.
90 if ( ! empty( $block_config ) ) {
91 update_post_meta( $form_id, self::BLOCK_CONFIG_META_KEY, $block_config );
92 }
93 }
94
95 /**
96 * Retrieve or migrate the block configuration for legacy forms.
97 *
98 * This function checks if the _suredonation_block_config post meta exists for the given form ID.
99 * If not found, it attempts to parse the form's post content and generate the block config.
100 *
101 * @param int $form_id The ID of the form post.
102 * @since 0.0.1
103 * @return array<string, array<string, mixed>>|null The block configuration array, or null if not found or invalid.
104 */
105 public static function get_or_migrate_block_config_for_legacy_form( $form_id ) {
106 // Validate that $form_id is a positive integer.
107 if ( ! is_int( $form_id ) || $form_id <= 0 ) {
108 return null;
109 }
110
111 // Retrieve the block config from post meta.
112 $block_config = get_post_meta( $form_id, self::BLOCK_CONFIG_META_KEY, true );
113 if ( ! empty( $block_config ) && is_array( $block_config ) ) {
114 // If it exists and is an array, return it directly (no migration needed).
115 return $block_config;
116 }
117
118 // Get the post by ID and validate.
119 $post = get_post( $form_id );
120 if ( ! ( $post instanceof \WP_Post ) || empty( $post->post_content ) ) {
121 return null;
122 }
123
124 // Parse the blocks from the post content and attempt migration.
125 if ( function_exists( 'parse_blocks' ) ) {
126 $blocks = parse_blocks( $post->post_content );
127 if ( is_array( $blocks ) && ! empty( $blocks ) ) {
128 self::add_block_config( $blocks, $form_id );
129 }
130 }
131
132 // Retrieve the block config again after migration attempt.
133 $block_config = get_post_meta( $form_id, self::BLOCK_CONFIG_META_KEY, true );
134
135 return ! empty( $block_config ) && is_array( $block_config ) ? $block_config : null;
136 }
137
138 /**
139 * Process blocks recursively to extract configuration.
140 *
141 * @param array<mixed> $blocks Array of blocks to process.
142 * @param array<mixed> $block_config Reference to block config array.
143 * @return void
144 * @since 0.0.1
145 */
146 private static function process_blocks_recursive( $blocks, &$block_config ) {
147 foreach ( $blocks as $block ) {
148 // Ensure $block is an array and has the required structure.
149 if ( ! is_array( $block ) ) {
150 continue;
151 }
152
153 // Process inner blocks recursively (for columns, groups, etc.).
154 if ( ! empty( $block['innerBlocks'] ) && is_array( $block['innerBlocks'] ) ) {
155 self::process_blocks_recursive( $block['innerBlocks'], $block_config );
156 }
157
158 if ( ! isset( $block['blockName'] ) || ! isset( $block['attrs'] ) || ! is_array( $block['attrs'] ) ) {
159 continue;
160 }
161
162 // Validate block_id exists.
163 if ( ! array_key_exists( 'block_id', $block['attrs'] ) || empty( $block['attrs']['block_id'] ) || ! is_string( $block['attrs']['block_id'] ) ) {
164 continue;
165 }
166
167 $block_id = sanitize_text_field( $block['attrs']['block_id'] );
168 $block_name = $block['blockName'];
169
170 // Process specific block types.
171 $processed_config = null;
172
173 switch ( $block_name ) {
174 case 'suredonation/payment':
175 $processed_config = self::process_payment_block( $block['attrs'], $blocks );
176 break;
177 case 'suredonation/donation-amount':
178 $processed_config = self::process_donation_amount_block( $block['attrs'] );
179 break;
180 case 'suredonation/number':
181 $processed_config = self::process_number_block( $block['attrs'] );
182 break;
183 case 'suredonation/cover-fees':
184 $processed_config = self::process_cover_fees_block( $block['attrs'] );
185 break;
186 case 'suredonation/input':
187 $processed_config = self::process_input_block( $block['attrs'] );
188 break;
189 case 'suredonation/email':
190 $processed_config = self::process_email_block( $block['attrs'] );
191 break;
192 case 'suredonation/checkbox':
193 $processed_config = self::process_checkbox_block( $block['attrs'] );
194 break;
195 case 'suredonation/dropdown':
196 $processed_config = self::process_dropdown_block( $block['attrs'] );
197 break;
198 case 'suredonation/phone':
199 $processed_config = self::process_phone_block( $block['attrs'] );
200 break;
201 case 'suredonation/url':
202 $processed_config = self::process_url_block( $block['attrs'] );
203 break;
204 case 'suredonation/donor-comment':
205 $processed_config = self::process_donor_comment_block( $block['attrs'] );
206 break;
207 }
208
209 /**
210 * Filter the stored validation config for a field block.
211 *
212 * Lets extensions contribute configuration for field blocks the
213 * core does not handle (e.g. phone, address, url) so their rules are
214 * persisted on save and picked up by validate_form_data(). Return a
215 * non-empty array (including at least a 'required' flag plus any rule
216 * values the validator needs) to store it under the block id.
217 *
218 * Set 'is_checkbox' => true for a consent-style boolean field so the
219 * submission handler stores its value as the canonical Yes/No token
220 * (see CHECKBOX_VALUES) and keeps the unticked state on the record
221 * instead of dropping it as an empty value.
222 *
223 * @since 1.1.0
224 * @param array<string, mixed>|null $processed_config Config from core (null when unhandled).
225 * @param string $block_name Block name.
226 * @param array<string, mixed> $attrs Block attributes.
227 * @param array<mixed> $blocks All blocks in the form.
228 */
229 $processed_config = apply_filters( 'suredonation_field_block_config', $processed_config, $block_name, $block['attrs'], $blocks );
230
231 // If block was processed, store its configuration.
232 if ( null !== $processed_config && ! empty( $processed_config ) ) {
233 $processed_config['block_name'] = $block_name;
234
235 // Add the slug to the configuration.
236 if ( isset( $block['attrs']['slug'] ) && ! empty( $block['attrs']['slug'] ) ) {
237 $processed_config['slug'] = sanitize_text_field( $block['attrs']['slug'] );
238 }
239
240 $block_config[ $block_id ] = $processed_config;
241 }
242 }
243 }
244
245 /**
246 * Process payment block configuration.
247 *
248 * Extracts payment-related settings that are needed for server-side validation:
249 * - payment_type: 'one-time', 'subscription' or 'both'
250 * - amount_type: 'fixed' or 'variable'
251 * - fixed_amount: The configured fixed amount
252 * - minimum_amount: The minimum allowed amount for variable amounts
253 * - variable_amount_field: The slug of the field providing the variable amount
254 * - one_time / subscription: per-choice amount configs, 'both' mode only
255 * - subscription_interval / subscription_billing_cycles: billing cadence, when a
256 * subscription path exists
257 *
258 * @param array<mixed> $attrs Block attributes.
259 * @param array<mixed> $blocks All blocks in the form.
260 * @return array<string, mixed> Processed payment configuration.
261 * @since 0.0.1
262 */
263 private static function process_payment_block( $attrs, $blocks ) {
264 $payment_config = [];
265
266 // Extract payment type (one-time, subscription, or both).
267 // Default to 'one-time' if not set (Gutenberg may not save default values).
268 $payment_config['payment_type'] = isset( $attrs['paymentType'] ) && is_string( $attrs['paymentType'] )
269 ? sanitize_text_field( $attrs['paymentType'] )
270 : 'one-time';
271
272 // Shared amount configuration. Kept at the top level for every payment type,
273 // including 'both', so blocks saved before dual-mode support — and any code
274 // still reading the flat keys — behave exactly as before.
275 $payment_config = array_merge( $payment_config, self::build_amount_config( $attrs, $blocks ) );
276
277 // In 'both' mode each choice carries its own amount configuration. Store them
278 // as separate sub-configs so validation can check the submitted amount against
279 // the mode the donor actually selected rather than a single shared amount.
280 if ( 'both' === $payment_config['payment_type'] ) {
281 $payment_config['one_time'] = self::build_amount_config( $attrs, $blocks, 'oneTime' );
282 $payment_config['subscription'] = self::build_amount_config( $attrs, $blocks, 'subscription' );
283 }
284
285 // Persist the billing cadence for any form with a subscription path. The admin
286 // picks these in the editor, so the stored values are the source of truth on
287 // submit — a tampered interval/cycles in the request cannot redirect the
288 // gateway to a different cadence.
289 //
290 // Stored UNCONDITIONALLY with PHP-side defaults (not gated on
291 // isset( subscriptionPlan )), exactly like build_amount_config() below:
292 // block.json's subscriptionPlan default is a fully-populated object, so
293 // Gutenberg omits the attribute whenever the admin accepts the defaults
294 // (Monthly / Ongoing / default name). Gating on it would leave the cadence
295 // unstored for that common case, get_subscription_cadence() would return
296 // empty, and the submit path would fall back to the request-supplied cadence.
297 if ( in_array( $payment_config['payment_type'], [ 'subscription', 'both' ], true ) ) {
298 $cadence = self::derive_subscription_cadence_from_attrs( $attrs );
299 $payment_config['subscription_interval'] = $cadence['subscription_interval'];
300 $payment_config['subscription_billing_cycles'] = $cadence['subscription_billing_cycles'];
301 }
302
303 return $payment_config;
304 }
305
306 /**
307 * Build one amount configuration (type, fixed, minimum, variable field) from a
308 * set of block attributes.
309 *
310 * Single-mode blocks use the unprefixed attributes (`amountType`, `fixedAmount`,
311 * …); 'both' mode stores an independent configuration per choice under the
312 * `oneTime`/`subscription` attribute prefixes. Defaults match block.json, because
313 * Gutenberg omits attributes whose value equals the default.
314 *
315 * @param array<mixed> $attrs Block attributes.
316 * @param array<mixed> $blocks All blocks in the form.
317 * @param string $prefix Attribute prefix ('' for the shared config, 'oneTime' or 'subscription').
318 * @return array<string, mixed> Amount configuration.
319 * @since 1.5.1
320 */
321 private static function build_amount_config( $attrs, $blocks, $prefix = '' ) {
322 // Maps a suffix onto the prefixed attribute name: an empty prefix gives
323 // "amountType", the oneTime prefix gives "oneTimeAmountType".
324 $attr_key = static function ( $name ) use ( $prefix ) {
325 return '' === $prefix ? lcfirst( $name ) : $prefix . $name;
326 };
327
328 $amount_type_key = $attr_key( 'AmountType' );
329 $fixed_key = $attr_key( 'FixedAmount' );
330 $minimum_key = $attr_key( 'MinimumAmount' );
331 $variable_key = $attr_key( 'VariableAmountField' );
332
333 $config = [
334 'amount_type' => isset( $attrs[ $amount_type_key ] ) && is_string( $attrs[ $amount_type_key ] )
335 ? sanitize_text_field( $attrs[ $amount_type_key ] )
336 : 'fixed',
337 'fixed_amount' => isset( $attrs[ $fixed_key ] ) ? floatval( Helper::get_string_value( $attrs[ $fixed_key ] ) ) : 10.00,
338 // Defaults to 0 (no minimum) — only enforced if the block setting specifies one.
339 'minimum_amount' => isset( $attrs[ $minimum_key ] ) ? floatval( Helper::get_string_value( $attrs[ $minimum_key ] ) ) : 0.0,
340 ];
341
342 // Stored unconditionally (empty string when unset) so absence is
343 // unambiguous: a 'variable' choice whose field was never picked reads as
344 // '' here, which validate_dynamic_amount_field() must reject rather than
345 // wave through. Gutenberg omits the attribute while it equals its ''
346 // default, so keying on isset() alone would hide that misconfiguration.
347 $variable_amount_slug = isset( $attrs[ $variable_key ] )
348 ? sanitize_text_field( Helper::get_string_value( $attrs[ $variable_key ] ) )
349 : '';
350 $config['variable_amount_field'] = $variable_amount_slug;
351
352 // Find and add the block name from which the variable amount field comes from.
353 if ( '' !== $variable_amount_slug && is_array( $blocks ) ) {
354 $block_name = self::find_block_name_by_slug( $blocks, $variable_amount_slug );
355 if ( $block_name ) {
356 $config['variable_amount_field_block_name'] = $block_name;
357 }
358 }
359
360 return $config;
361 }
362
363 /**
364 * Find block name by slug recursively.
365 *
366 * @param array<mixed> $blocks Array of blocks.
367 * @param string $slug Slug to find.
368 * @return string|null Block name if found, null otherwise.
369 * @since 0.0.1
370 */
371 private static function find_block_name_by_slug( $blocks, $slug ) {
372 foreach ( $blocks as $block ) {
373 if ( ! is_array( $block ) ) {
374 continue;
375 }
376
377 // Check inner blocks first.
378 if ( ! empty( $block['innerBlocks'] ) && is_array( $block['innerBlocks'] ) ) {
379 $found = self::find_block_name_by_slug( $block['innerBlocks'], $slug );
380 if ( $found ) {
381 return $found;
382 }
383 }
384
385 if ( isset( $block['attrs']['slug'] ) && $block['attrs']['slug'] === $slug ) {
386 return $block['blockName'];
387 }
388 }
389 return null;
390 }
391
392 /**
393 * Resolve the slugs of the core donor fields (name, email, variable amount
394 * and the optional mapped phone) from a form's saved payment block.
395 *
396 * These fields are surfaced as first-class donation data and persisted in
397 * their own columns, so the stored "additional" field set omits them.
398 * Deriving the slugs from the saved form here (instead of trusting a
399 * client-supplied list) keeps the exclusion authoritative — a tampered
400 * submission cannot smuggle a core field into the additional set.
401 *
402 * @since 1.1.1
403 * @param int $form_id The donation form post ID.
404 * @return array<int, string> List of core field slugs (empty when none/invalid).
405 */
406 public static function get_core_field_slugs( $form_id ) {
407 if ( ! is_int( $form_id ) || $form_id <= 0 || ! function_exists( 'parse_blocks' ) ) {
408 return [];
409 }
410
411 $post = get_post( $form_id );
412 if ( ! ( $post instanceof \WP_Post ) || empty( $post->post_content ) ) {
413 return [];
414 }
415
416 $blocks = parse_blocks( $post->post_content );
417 $slugs = [];
418
419 $payment_attrs = self::find_payment_block_attrs( $blocks );
420 if ( ! empty( $payment_attrs ) ) {
421 foreach ( [ 'customerNameField', 'customerEmailField', 'customerPhoneField', 'variableAmountField' ] as $attr ) {
422 if ( isset( $payment_attrs[ $attr ] ) && is_string( $payment_attrs[ $attr ] ) ) {
423 $slug = sanitize_text_field( $payment_attrs[ $attr ] );
424 if ( '' !== $slug ) {
425 $slugs[] = $slug;
426 }
427 }
428 }
429 }
430
431 // The donor comment also lives in its own column, so it is excluded from
432 // the additional set for the same reason. Unlike the fields above it is not
433 // mapped on the payment block — the presence of the block is the mapping —
434 // so it is resolved from the already-parsed tree rather than through
435 // get_donor_comment_slug(), which would parse the form a second time.
436 $comment_slug = self::find_slug_by_block_name( $blocks, 'suredonation/donor-comment' );
437 if ( is_string( $comment_slug ) && '' !== $comment_slug ) {
438 $slugs[] = sanitize_text_field( $comment_slug );
439 }
440
441 return array_values( array_unique( $slugs ) );
442 }
443
444 /**
445 * Resolve the slug of the form's Donor Comment field.
446 *
447 * Unlike the donor phone — which is mapped through a picker on the payment
448 * block — the Donor Comment field is its own block, so the block's presence
449 * in the saved form *is* the mapping. Returning the slug lets the submission
450 * handlers read the already-validated value out of the submitted field set
451 * and store it in the dedicated donor_comment column, rather than trusting a
452 * separate client-supplied key. A comment posted against a form that has no
453 * Donor Comment block is therefore ignored, matching how
454 * Payment_Helper::get_submitted_is_anonymous() derives the anonymity option
455 * from the saved form.
456 *
457 * Only one field can feed the single column: when a form somehow contains
458 * more than one block (the editor warns against it), the first in document
459 * order wins.
460 *
461 * @since 1.6.0
462 * @param int $form_id The donation form post ID.
463 * @return string The Donor Comment field slug, or '' when the form has none.
464 */
465 public static function get_donor_comment_slug( $form_id ) {
466 $form_id = (int) $form_id;
467 if ( $form_id <= 0 || ! function_exists( 'parse_blocks' ) ) {
468 return '';
469 }
470
471 // form_id is attacker-chosen on a public endpoint, so confirm it really is
472 // a donation form before parsing its content — otherwise the request can
473 // aim a full block parse at any post in the database.
474 $post = get_post( $form_id );
475 if ( ! ( $post instanceof \WP_Post )
476 || \SureDonation\Inc\Post_Types\Donation_Form::POST_TYPE !== $post->post_type
477 || empty( $post->post_content ) ) {
478 return '';
479 }
480
481 $slug = self::find_slug_by_block_name( parse_blocks( $post->post_content ), 'suredonation/donor-comment' );
482
483 return null === $slug ? '' : sanitize_text_field( $slug );
484 }
485
486 /**
487 * Find the `slug` attribute of the first block with the given name.
488 *
489 * The inverse of find_block_name_by_slug(). Walks in document order, parents
490 * before children, so "first match" is stable and matches what the editor
491 * shows the author.
492 *
493 * @since 1.6.0
494 * @param array<mixed> $blocks Array of parsed blocks.
495 * @param string $block_name Block name to look for.
496 * @return string|null The slug, or null when the block is absent or has no slug.
497 */
498 private static function find_slug_by_block_name( $blocks, $block_name ) {
499 if ( ! is_array( $blocks ) ) {
500 return null;
501 }
502
503 foreach ( $blocks as $block ) {
504 if ( ! is_array( $block ) ) {
505 continue;
506 }
507
508 if ( isset( $block['blockName'] ) && $block_name === $block['blockName']
509 && isset( $block['attrs']['slug'] ) && is_string( $block['attrs']['slug'] )
510 && '' !== $block['attrs']['slug'] ) {
511 return $block['attrs']['slug'];
512 }
513
514 if ( ! empty( $block['innerBlocks'] ) && is_array( $block['innerBlocks'] ) ) {
515 $found = self::find_slug_by_block_name( $block['innerBlocks'], $block_name );
516 if ( null !== $found ) {
517 return $found;
518 }
519 }
520 }
521
522 return null;
523 }
524
525 /**
526 * Find the suredonation/payment block's attributes recursively.
527 *
528 * @since 1.1.1
529 * @param array<mixed> $blocks Array of parsed blocks.
530 * @return array<string, mixed>|null The payment block attributes, or null when absent.
531 */
532 private static function find_payment_block_attrs( $blocks ) {
533 if ( ! is_array( $blocks ) ) {
534 return null;
535 }
536
537 foreach ( $blocks as $block ) {
538 if ( ! is_array( $block ) ) {
539 continue;
540 }
541
542 if ( isset( $block['blockName'] ) && 'suredonation/payment' === $block['blockName'] && isset( $block['attrs'] ) && is_array( $block['attrs'] ) ) {
543 return $block['attrs'];
544 }
545
546 if ( ! empty( $block['innerBlocks'] ) && is_array( $block['innerBlocks'] ) ) {
547 $found = self::find_payment_block_attrs( $block['innerBlocks'] );
548 if ( null !== $found ) {
549 return $found;
550 }
551 }
552 }
553
554 return null;
555 }
556
557 /**
558 * Derive the billing cadence from a payment block's attributes.
559 *
560 * Single source of truth shared by build_amount_config() (store time) and
561 * resolve_subscription_cadence_from_content() (legacy re-resolve). block.json's
562 * subscriptionPlan default is a fully-populated object, so Gutenberg omits the
563 * attribute whenever the admin accepts the defaults — hence the PHP-side
564 * defaults of month / ongoing here.
565 *
566 * @since 1.5.1
567 * @param array<string, mixed> $attrs Parsed payment-block attributes.
568 * @return array{subscription_interval: string, subscription_billing_cycles: int|string}
569 */
570 private static function derive_subscription_cadence_from_attrs( $attrs ) {
571 $plan = isset( $attrs['subscriptionPlan'] ) && is_array( $attrs['subscriptionPlan'] )
572 ? $attrs['subscriptionPlan']
573 : [];
574
575 $interval = isset( $plan['interval'] ) && is_string( $plan['interval'] )
576 ? sanitize_text_field( $plan['interval'] )
577 : 'month';
578
579 if ( isset( $plan['billingCycles'] ) ) {
580 // billingCycles is either an integer count or the string 'ongoing'.
581 $cycles = $plan['billingCycles'];
582 $billing_cycles = is_numeric( $cycles )
583 ? (int) $cycles
584 : sanitize_text_field( Helper::get_string_value( $cycles ) );
585 } else {
586 $billing_cycles = 'ongoing';
587 }
588
589 return [
590 'subscription_interval' => $interval,
591 'subscription_billing_cycles' => $billing_cycles,
592 ];
593 }
594
595 /**
596 * Re-resolve a form's billing cadence from its stored post content.
597 *
598 * Forms saved before the cadence was persisted into the block config carry no
599 * subscription_interval/billing_cycles keys in stored meta, and the config is
600 * only rebuilt on save_post — so those keys never appear until the admin
601 * happens to re-save. Rather than let the submit path assume month / ongoing
602 * (which silently rewrites the admin's real plan — e.g. a 5-cycle yearly plan
603 * becomes ongoing monthly), re-derive from the parsed payment block. This is
604 * still server-side and untamperable: it reads post_content, never the request.
605 *
606 * @since 1.5.1
607 * @param int $form_id Donation form post ID.
608 * @return array{subscription_interval: string, subscription_billing_cycles: int|string}|null
609 * Cadence, or null when the form has no readable payment block.
610 */
611 public static function resolve_subscription_cadence_from_content( $form_id ) {
612 if ( ! is_int( $form_id ) || $form_id <= 0 || ! function_exists( 'parse_blocks' ) ) {
613 return null;
614 }
615
616 $post = get_post( $form_id );
617 if ( ! ( $post instanceof \WP_Post ) || empty( $post->post_content ) ) {
618 return null;
619 }
620
621 $attrs = self::find_payment_block_attrs( parse_blocks( $post->post_content ) );
622 if ( ! is_array( $attrs ) ) {
623 return null;
624 }
625
626 return self::derive_subscription_cadence_from_attrs( $attrs );
627 }
628
629 /**
630 * Resolve the slug of the field mapped to the donor phone on the payment block.
631 *
632 * The mapping is optional: when an author maps a Phone field via the payment
633 * block's "Customer Phone Field" picker, its value is stored in the dedicated
634 * donor_phone column. Returning the slug lets the submission handlers read the
635 * already-validated value from the submitted fields rather than trusting a
636 * separate client-supplied donor_phone field.
637 *
638 * @since 1.1.1
639 * @param int $form_id The donation form post ID.
640 * @return string The mapped phone field slug, or '' when unset/invalid.
641 */
642 public static function get_mapped_phone_slug( $form_id ) {
643 if ( ! is_int( $form_id ) || $form_id <= 0 || ! function_exists( 'parse_blocks' ) ) {
644 return '';
645 }
646
647 $post = get_post( $form_id );
648 if ( ! ( $post instanceof \WP_Post ) || empty( $post->post_content ) ) {
649 return '';
650 }
651
652 $payment_attrs = self::find_payment_block_attrs( parse_blocks( $post->post_content ) );
653 if ( empty( $payment_attrs ) || ! isset( $payment_attrs['customerPhoneField'] ) || ! is_string( $payment_attrs['customerPhoneField'] ) ) {
654 return '';
655 }
656
657 return sanitize_text_field( $payment_attrs['customerPhoneField'] );
658 }
659
660 /**
661 * Build a map of field slug => label from a form's saved blocks.
662 *
663 * The label persisted with each submitted field is resolved from the saved
664 * form (the authoritative source) rather than scraped from the rendered
665 * page and trusted from the request — mirroring how SureForms recovers a
666 * field's label server-side instead of from client-supplied text. Gutenberg
667 * omits attributes left at their default, so a slug missing from this map
668 * simply has no customized label and the caller falls back to the label
669 * sent with the submission.
670 *
671 * @since 1.1.1
672 * @param int $form_id The donation form post ID.
673 * @return array<string, string> Map of field slug => label (empty when none/invalid).
674 */
675 public static function get_field_labels_map( $form_id ) {
676 if ( ! is_int( $form_id ) || $form_id <= 0 || ! function_exists( 'parse_blocks' ) ) {
677 return [];
678 }
679
680 $post = get_post( $form_id );
681 if ( ! ( $post instanceof \WP_Post ) || empty( $post->post_content ) ) {
682 return [];
683 }
684
685 $labels = [];
686 self::collect_field_labels( parse_blocks( $post->post_content ), $labels );
687
688 return $labels;
689 }
690
691 /**
692 * Recursively collect slug => label pairs from parsed blocks.
693 *
694 * Inner blocks are walked first so nested sub-fields are captured before
695 * their container; the first label seen for a slug wins.
696 *
697 * @since 1.1.1
698 * @param array<mixed> $blocks Parsed blocks.
699 * @param array<string, string> $labels Accumulator passed by reference.
700 * @return void
701 */
702 private static function collect_field_labels( $blocks, &$labels ) {
703 if ( ! is_array( $blocks ) ) {
704 return;
705 }
706
707 foreach ( $blocks as $block ) {
708 if ( ! is_array( $block ) ) {
709 continue;
710 }
711
712 if ( ! empty( $block['innerBlocks'] ) && is_array( $block['innerBlocks'] ) ) {
713 self::collect_field_labels( $block['innerBlocks'], $labels );
714 }
715
716 if ( ! isset( $block['attrs'] ) || ! is_array( $block['attrs'] ) ) {
717 continue;
718 }
719
720 $slug = isset( $block['attrs']['slug'] ) && is_string( $block['attrs']['slug'] )
721 ? sanitize_text_field( $block['attrs']['slug'] )
722 : '';
723 if ( '' === $slug || isset( $labels[ $slug ] ) ) {
724 continue;
725 }
726
727 if ( isset( $block['attrs']['label'] ) && is_string( $block['attrs']['label'] ) ) {
728 $labels[ $slug ] = sanitize_text_field( $block['attrs']['label'] );
729 }
730 }
731 }
732
733 /**
734 * Process donation-amount block configuration.
735 *
736 * @param array<mixed> $attrs Block attributes.
737 * @return array<string, mixed> Processed donation-amount configuration.
738 * @since 0.0.1
739 */
740 private static function process_donation_amount_block( $attrs ) {
741 $donation_amount_config = [];
742
743 // Extract required field.
744 if ( isset( $attrs['required'] ) ) {
745 $donation_amount_config['required'] = ! empty( $attrs['required'] );
746 }
747
748 // Extract choice type (radio or checkbox).
749 if ( isset( $attrs['choiceType'] ) ) {
750 $donation_amount_config['choice_type'] = sanitize_text_field( $attrs['choiceType'] );
751 }
752
753 // Extract options with their full structure (label, value).
754 if ( isset( $attrs['options'] ) && is_array( $attrs['options'] ) ) {
755 $sanitized_options = [];
756 foreach ( $attrs['options'] as $option ) {
757 if ( is_array( $option ) ) {
758 $sanitized_options[] = [
759 'label' => isset( $option['label'] ) ? sanitize_text_field( $option['label'] ) : '',
760 'value' => isset( $option['value'] ) ? sanitize_text_field( $option['value'] ) : '',
761 ];
762 }
763 }
764 $donation_amount_config['options'] = $sanitized_options;
765 }
766
767 // Custom amount settings (radio-mode only).
768 $donation_amount_config['allow_custom_amount'] = ! isset( $attrs['allowCustomAmount'] ) || ! empty( $attrs['allowCustomAmount'] );
769 $donation_amount_config['custom_amount_min'] = isset( $attrs['customAmountMin'] ) ? (float) $attrs['customAmountMin'] : 0.0;
770 $donation_amount_config['custom_amount_max'] = isset( $attrs['customAmountMax'] ) ? (float) $attrs['customAmountMax'] : 0.0;
771
772 return $donation_amount_config;
773 }
774
775 /**
776 * Process cover-fees block configuration.
777 *
778 * Resolves global vs block-level fee rates and stores them for server-side validation.
779 *
780 * @param array<mixed> $attrs Block attributes.
781 * @return array<string, mixed> Processed cover fees configuration.
782 * @since 1.0.0
783 */
784 private static function process_cover_fees_block( $attrs ) {
785 $use_global = $attrs['useGlobalDefaults'] ?? true;
786
787 if ( $use_global ) {
788 $fee_config = \SureDonation\Inc\Payments\Payment_Helper::get_fee_recovery_settings();
789 } else {
790 $fee_config = [
791 'fee_percentage' => isset( $attrs['feePercentage'] ) ? floatval( $attrs['feePercentage'] ) : 2.9,
792 'fee_fixed' => isset( $attrs['feeFixed'] ) ? floatval( $attrs['feeFixed'] ) : 0.30,
793 'fee_mode' => $attrs['feeMode'] ?? 'all_gateways',
794 'gateways' => $attrs['gatewayFees'] ?? [],
795 ];
796 }
797
798 return [
799 'use_global_defaults' => $use_global,
800 'fee_percentage' => (float) ( $fee_config['fee_percentage'] ?? 2.9 ),
801 'fee_fixed' => (float) ( $fee_config['fee_fixed'] ?? 0.30 ),
802 'fee_mode' => $fee_config['fee_mode'] ?? 'all_gateways',
803 'gateway_fees' => $fee_config['gateways'] ?? [],
804 ];
805 }
806
807 /**
808 * Process number block configuration.
809 *
810 * @param array<mixed> $attrs Block attributes.
811 * @return array<string, mixed> Processed number block configuration.
812 * @since 0.0.1
813 */
814 private static function process_number_block( $attrs ) {
815 $number_config = [];
816
817 // Extract required field.
818 if ( isset( $attrs['required'] ) ) {
819 $number_config['required'] = ! empty( $attrs['required'] );
820 }
821
822 // Extract min value.
823 if ( isset( $attrs['min'] ) ) {
824 $number_config['min'] = floatval( $attrs['min'] );
825 }
826
827 // Extract max value.
828 if ( isset( $attrs['max'] ) ) {
829 $number_config['max'] = floatval( $attrs['max'] );
830 }
831
832 // Field-level min/max value rules for client + server validation.
833 //
834 // These are stored under dedicated keys (read from the block's real
835 // `minValue`/`maxValue` attributes) and are deliberately kept separate
836 // from the amount-path `min`/`max` keys above, which are consumed by
837 // Payment_Helper::validate_number_field_amount(). Coerced with absint to
838 // match Number_Markup, which renders integer min/max — keeping the
839 // rendered HTML constraints and server validation in sync. The markup
840 // mirrors these exact defaults: min is always present (default 1) and
841 // max only applies when greater than zero.
842 $number_config['validation_min'] = isset( $attrs['minValue'] ) ? absint( Helper::get_string_value( $attrs['minValue'] ) ) : 1;
843 $number_config['validation_max'] = isset( $attrs['maxValue'] ) ? absint( Helper::get_string_value( $attrs['maxValue'] ) ) : 0;
844
845 // Per-field custom required message.
846 $error_msg = isset( $attrs['errorMsg'] ) ? sanitize_text_field( Helper::get_string_value( $attrs['errorMsg'] ) ) : '';
847 if ( '' !== $error_msg ) {
848 $number_config['error_msg'] = $error_msg;
849 }
850
851 return $number_config;
852 }
853
854 /**
855 * Process input (text) block configuration.
856 *
857 * Extracts the field-level validation rules — required, max length and the
858 * optional per-field custom required message — for server-side enforcement.
859 *
860 * @param array<mixed> $attrs Block attributes.
861 * @return array<string, mixed> Processed input block configuration.
862 * @since 1.1.0
863 */
864 private static function process_input_block( $attrs ) {
865 $input_config = [
866 'required' => ! empty( $attrs['required'] ),
867 'max_length' => isset( $attrs['maxLength'] ) ? absint( Helper::get_string_value( $attrs['maxLength'] ) ) : 100,
868 ];
869
870 $error_msg = isset( $attrs['errorMsg'] ) ? sanitize_text_field( Helper::get_string_value( $attrs['errorMsg'] ) ) : '';
871 if ( '' !== $error_msg ) {
872 $input_config['error_msg'] = $error_msg;
873 }
874
875 return $input_config;
876 }
877
878 /**
879 * Process email block configuration.
880 *
881 * Extracts required state, the optional per-field custom required message
882 * and the per-field invalid-email message for server-side enforcement.
883 *
884 * @param array<mixed> $attrs Block attributes.
885 * @return array<string, mixed> Processed email block configuration.
886 * @since 1.1.0
887 */
888 private static function process_email_block( $attrs ) {
889 $email_config = [
890 'required' => ! empty( $attrs['required'] ),
891 ];
892
893 $error_msg = isset( $attrs['errorMsg'] ) ? sanitize_text_field( Helper::get_string_value( $attrs['errorMsg'] ) ) : '';
894 if ( '' !== $error_msg ) {
895 $email_config['error_msg'] = $error_msg;
896 }
897
898 $invalid_email_msg = isset( $attrs['invalidEmailMsg'] ) ? sanitize_text_field( Helper::get_string_value( $attrs['invalidEmailMsg'] ) ) : '';
899 if ( '' !== $invalid_email_msg ) {
900 $email_config['invalid_email_msg'] = $invalid_email_msg;
901 }
902
903 return $email_config;
904 }
905
906 /**
907 * Process dropdown block configuration.
908 *
909 * Stores required state, multi-select bounds and the allowed option labels so
910 * the server can enforce required/min/max selections and reject tampered values.
911 *
912 * @param array<mixed> $attrs Block attributes.
913 * @return array<string, mixed> Processed dropdown block configuration.
914 * @since 1.1.1
915 */
916 private static function process_dropdown_block( $attrs ) {
917 $dropdown_config = [
918 'required' => ! empty( $attrs['required'] ),
919 'multi_select' => ! empty( $attrs['multiSelect'] ),
920 'min_selection' => isset( $attrs['minSelection'] ) ? absint( Helper::get_string_value( $attrs['minSelection'] ) ) : 0,
921 'max_selection' => isset( $attrs['maxSelection'] ) ? absint( Helper::get_string_value( $attrs['maxSelection'] ) ) : 0,
922 ];
923
924 // Allowed option labels (the submitted value(s) must match one of these).
925 $options = [];
926 if ( isset( $attrs['options'] ) && is_array( $attrs['options'] ) ) {
927 foreach ( $attrs['options'] as $option ) {
928 if ( is_array( $option ) && isset( $option['label'] ) && '' !== $option['label'] ) {
929 $options[] = sanitize_text_field( Helper::get_string_value( $option['label'] ) );
930 }
931 }
932 }
933 $dropdown_config['options'] = $options;
934
935 $error_msg = isset( $attrs['errorMsg'] ) ? sanitize_text_field( Helper::get_string_value( $attrs['errorMsg'] ) ) : '';
936 if ( '' !== $error_msg ) {
937 $dropdown_config['error_msg'] = $error_msg;
938 }
939
940 return $dropdown_config;
941 }
942
943 /**
944 * Process phone block configuration.
945 *
946 * Stores required state and the optional per-field custom required message for
947 * server-side enforcement. Phone-number format is validated loosely (see
948 * validate_field_value) because the submitted value is the E.164-style number
949 * produced by intl-tel-input.
950 *
951 * @param array<mixed> $attrs Block attributes.
952 * @return array<string, mixed> Processed phone block configuration.
953 * @since 1.1.1
954 */
955 private static function process_phone_block( $attrs ) {
956 $phone_config = [
957 'required' => ! empty( $attrs['required'] ),
958 ];
959
960 $error_msg = isset( $attrs['errorMsg'] ) ? sanitize_text_field( Helper::get_string_value( $attrs['errorMsg'] ) ) : '';
961 if ( '' !== $error_msg ) {
962 $phone_config['error_msg'] = $error_msg;
963 }
964
965 return $phone_config;
966 }
967
968 /**
969 * Process url block configuration.
970 *
971 * Stores required state, the optional per-field custom required message and
972 * the per-field invalid-URL message for server-side enforcement.
973 *
974 * @param array<mixed> $attrs Block attributes.
975 * @return array<string, mixed> Processed url block configuration.
976 * @since 1.1.1
977 */
978 private static function process_url_block( $attrs ) {
979 $url_config = [
980 'required' => ! empty( $attrs['required'] ),
981 ];
982
983 $error_msg = isset( $attrs['errorMsg'] ) ? sanitize_text_field( Helper::get_string_value( $attrs['errorMsg'] ) ) : '';
984 if ( '' !== $error_msg ) {
985 $url_config['error_msg'] = $error_msg;
986 }
987
988 $invalid_url_msg = isset( $attrs['invalidUrlMsg'] ) ? sanitize_text_field( Helper::get_string_value( $attrs['invalidUrlMsg'] ) ) : '';
989 if ( '' !== $invalid_url_msg ) {
990 $url_config['invalid_url_msg'] = $invalid_url_msg;
991 }
992
993 return $url_config;
994 }
995
996 /**
997 * Process donor comment block configuration.
998 *
999 * Stores required state, max length and the optional per-field custom
1000 * required message for server-side enforcement. Mirrors the text input's
1001 * rules — the field is a plain textarea with no format constraint.
1002 *
1003 * @param array<mixed> $attrs Block attributes.
1004 * @return array<string, mixed> Processed donor comment block configuration.
1005 * @since 1.6.0
1006 */
1007 private static function process_donor_comment_block( $attrs ) {
1008 $comment_config = [
1009 'required' => ! empty( $attrs['required'] ),
1010 'max_length' => isset( $attrs['maxLength'] ) ? absint( Helper::get_string_value( $attrs['maxLength'] ) ) : 500,
1011 ];
1012
1013 $error_msg = isset( $attrs['errorMsg'] ) ? sanitize_text_field( Helper::get_string_value( $attrs['errorMsg'] ) ) : '';
1014 if ( '' !== $error_msg ) {
1015 $comment_config['error_msg'] = $error_msg;
1016 }
1017
1018 return $comment_config;
1019 }
1020
1021 /**
1022 * Process checkbox block configuration.
1023 *
1024 * A checkbox carries no format or range rules — only the required flag and
1025 * the optional per-field error message. `is_checkbox` is stored so the
1026 * submission handler can recognise the field by its saved configuration
1027 * (rather than trusting the request) when it renders the value as Yes/No.
1028 *
1029 * @param array<mixed> $attrs Block attributes.
1030 * @return array<string, mixed> Processed checkbox configuration.
1031 * @since 1.5.1
1032 */
1033 private static function process_checkbox_block( $attrs ) {
1034 $checkbox_config = [
1035 'required' => ! empty( $attrs['required'] ),
1036 'is_checkbox' => true,
1037 ];
1038
1039 $error_msg = isset( $attrs['errorMsg'] ) ? sanitize_text_field( Helper::get_string_value( $attrs['errorMsg'] ) ) : '';
1040 if ( '' !== $error_msg ) {
1041 $checkbox_config['error_msg'] = $error_msg;
1042 }
1043
1044 return $checkbox_config;
1045 }
1046
1047 /**
1048 * Resolve the slugs of the form's checkbox fields.
1049 *
1050 * Read from the saved form's stored block configuration, so a submission
1051 * cannot claim a field is (or is not) a checkbox. Used to render the
1052 * submitted value as a readable Yes/No rather than a bare "1"/empty, and to
1053 * keep an unchecked box in the stored record instead of dropping it as an
1054 * empty value.
1055 *
1056 * Only `suredonation/checkbox` fields are returned. The fixed-purpose
1057 * consent checkboxes (anonymous donation, cover fees, privacy consent) are
1058 * not form-editor field blocks and have no entry in the block config, so
1059 * their storage is unaffected.
1060 *
1061 * @param int $form_id Donation form post ID.
1062 * @return array<int, string> Checkbox field slugs.
1063 * @since 1.5.1
1064 */
1065 public static function get_checkbox_field_slugs( $form_id ) {
1066 $form_id = absint( $form_id );
1067 if ( $form_id <= 0 ) {
1068 return [];
1069 }
1070
1071 $block_config = self::get_or_migrate_block_config_for_legacy_form( $form_id );
1072 if ( empty( $block_config ) || ! is_array( $block_config ) ) {
1073 return [];
1074 }
1075
1076 $slugs = [];
1077 foreach ( $block_config as $config ) {
1078 if ( ! is_array( $config ) || empty( $config['is_checkbox'] ) ) {
1079 continue;
1080 }
1081
1082 $slug = isset( $config['slug'] ) && is_string( $config['slug'] ) ? $config['slug'] : '';
1083 if ( '' !== $slug ) {
1084 $slugs[] = $slug;
1085 }
1086 }
1087
1088 return $slugs;
1089 }
1090
1091 /**
1092 * Get the block types that participate in field validation.
1093 *
1094 * Extensions register new validatable field blocks (e.g. phone, address,
1095 * url) via the filter so their values run through validate_form_data().
1096 * Pair this with the suredonation_field_block_config filter (to store the
1097 * block's rules on save) and suredonation_validate_field (to apply them).
1098 *
1099 * @return array<int, string>
1100 * @since 1.1.0
1101 */
1102 public static function get_validatable_blocks() {
1103 /**
1104 * Filter the block types that participate in field validation.
1105 *
1106 * @since 1.1.0
1107 * @param array<int, string> $blocks Validatable block names.
1108 */
1109 $blocks = apply_filters( 'suredonation_validatable_blocks', self::VALIDATABLE_BLOCKS );
1110
1111 return is_array( $blocks ) ? $blocks : self::VALIDATABLE_BLOCKS;
1112 }
1113
1114 /**
1115 * Validate submitted donation form field values server-side.
1116 *
1117 * This is the authoritative validation pass: it reads the immutable block
1118 * configuration stored on form save and enforces each field's rules
1119 * (required, max length, email format, number range). Per-field custom
1120 * messages take precedence over the global defaults configured under
1121 * Global Settings → Form Validation.
1122 *
1123 * @param array<string, mixed> $fields Submitted field values keyed by field slug.
1124 * @param int $form_id Donation form post ID.
1125 * @return array<string, string> Map of field slug => error message. Empty when valid.
1126 * @since 1.1.0
1127 */
1128 public static function validate_form_data( $fields, $form_id ) {
1129 $errors = [];
1130
1131 if ( ! is_array( $fields ) ) {
1132 $fields = [];
1133 }
1134
1135 $form_id = absint( $form_id );
1136 if ( $form_id <= 0 ) {
1137 return $errors;
1138 }
1139
1140 $block_config = self::get_or_migrate_block_config_for_legacy_form( $form_id );
1141 if ( empty( $block_config ) || ! is_array( $block_config ) ) {
1142 return $errors;
1143 }
1144
1145 $validatable = self::get_validatable_blocks();
1146
1147 foreach ( $block_config as $config ) {
1148 if ( ! is_array( $config ) ) {
1149 continue;
1150 }
1151
1152 $block_name = isset( $config['block_name'] ) && is_string( $config['block_name'] ) ? $config['block_name'] : '';
1153 $slug = isset( $config['slug'] ) && is_string( $config['slug'] ) ? $config['slug'] : '';
1154
1155 if ( '' === $slug || ! in_array( $block_name, $validatable, true ) ) {
1156 continue;
1157 }
1158
1159 $raw_value = array_key_exists( $slug, $fields ) ? $fields[ $slug ] : '';
1160 $value = is_scalar( $raw_value ) ? trim( (string) $raw_value ) : '';
1161
1162 $error = self::validate_field_value( $block_name, $config, $value );
1163
1164 /**
1165 * Filter the validation error for a single donation form field.
1166 *
1167 * Lets extensions (e.g. SureDonation Pro) add custom validators for
1168 * their own field types or rules. Return a non-empty string to flag
1169 * the field as invalid; return an empty string to pass.
1170 *
1171 * @since 1.1.0
1172 * @param string $error Current error message ('' when valid).
1173 * @param string $value Submitted, trimmed field value.
1174 * @param array<string, mixed> $config Stored block configuration for the field.
1175 * @param int $form_id Donation form ID.
1176 * @param string $block_name Block name (e.g. 'suredonation/input').
1177 */
1178 $error = apply_filters( 'suredonation_validate_field', $error, $value, $config, $form_id, $block_name );
1179
1180 if ( is_string( $error ) && '' !== $error ) {
1181 $errors[ $slug ] = $error;
1182 }
1183 }
1184
1185 return $errors;
1186 }
1187
1188 /**
1189 * Get a validation message by key, preferring the admin override.
1190 *
1191 * @param string $key Message key.
1192 * @return string
1193 * @since 1.1.0
1194 */
1195 public static function get_validation_message( $key ) {
1196 $defaults = self::default_validation_messages();
1197 $stored = Helper::get_suredonation_option( self::VALIDATION_MESSAGES_OPTION_KEY, [] );
1198
1199 if ( is_array( $stored ) && ! empty( $stored[ $key ] ) && is_string( $stored[ $key ] ) ) {
1200 return $stored[ $key ];
1201 }
1202
1203 return isset( $defaults[ $key ] ) ? $defaults[ $key ] : '';
1204 }
1205
1206 /**
1207 * Default (fallback) validation messages, keyed by message key.
1208 *
1209 * Messages containing %s use sprintf substitution for the configured bound.
1210 *
1211 * @return array<string, string>
1212 * @since 1.1.0
1213 */
1214 public static function default_validation_messages() {
1215 $messages = [
1216 'suredonation_input_block_required_text' => __( 'This field is required.', 'suredonation' ),
1217 'suredonation_email_block_required_text' => __( 'This field is required.', 'suredonation' ),
1218 'suredonation_number_block_required_text' => __( 'This field is required.', 'suredonation' ),
1219 'suredonation_checkbox_block_required_text' => __( 'This field is required.', 'suredonation' ),
1220 'suredonation_dropdown_block_required_text' => __( 'This field is required.', 'suredonation' ),
1221 'suredonation_phone_block_required_text' => __( 'This field is required.', 'suredonation' ),
1222 'suredonation_url_block_required_text' => __( 'This field is required.', 'suredonation' ),
1223 'suredonation_donor_comment_block_required_text' => __( 'This field is required.', 'suredonation' ),
1224 'suredonation_valid_email' => __( 'Please enter a valid email address.', 'suredonation' ),
1225 'suredonation_valid_number' => __( 'Please enter a valid number.', 'suredonation' ),
1226 'suredonation_valid_phone' => __( 'Please enter a valid phone number.', 'suredonation' ),
1227 'suredonation_valid_url' => __( 'Please enter a valid URL.', 'suredonation' ),
1228 'suredonation_dropdown_invalid_option' => __( 'Please select a valid option.', 'suredonation' ),
1229 /* translators: %s: minimum number of selections required. */
1230 'suredonation_dropdown_min_selection' => __( 'Please select at least %s option(s).', 'suredonation' ),
1231 /* translators: %s: maximum number of selections allowed. */
1232 'suredonation_dropdown_max_selection' => __( 'Please select no more than %s option(s).', 'suredonation' ),
1233 /* translators: %s: maximum number of characters allowed. */
1234 'suredonation_input_max_length' => __( 'Maximum length is %s characters.', 'suredonation' ),
1235 /* translators: %s: maximum characters allowed before the @ symbol. */
1236 'suredonation_email_local_max_length' => __( 'The part before @ may not exceed %s characters.', 'suredonation' ),
1237 /* translators: %s: maximum characters allowed after the @ symbol. */
1238 'suredonation_email_domain_max_length' => __( 'The part after @ may not exceed %s characters.', 'suredonation' ),
1239 /* translators: %s: maximum total characters allowed in an email address. */
1240 'suredonation_email_max_length' => __( 'The email address may not exceed %s characters.', 'suredonation' ),
1241 /* translators: %s: minimum allowed value. */
1242 'suredonation_input_min_value' => __( 'Minimum value is %s.', 'suredonation' ),
1243 /* translators: %s: maximum allowed value. */
1244 'suredonation_input_max_value' => __( 'Maximum value is %s.', 'suredonation' ),
1245 ];
1246
1247 /**
1248 * Filter the default validation messages.
1249 *
1250 * Extensions add message keys for their own field types here so the
1251 * messages resolve, localize and surface in the Form Validation tab
1252 * alongside the core ones. Keys containing %s use sprintf substitution.
1253 *
1254 * @since 1.1.0
1255 * @param array<string, string> $messages Default messages keyed by message key.
1256 */
1257 return apply_filters( 'suredonation_default_validation_messages', $messages );
1258 }
1259
1260 /**
1261 * Get the fully resolved validation messages (admin overrides over defaults).
1262 *
1263 * Used to localize the messages to the frontend so client-side validation
1264 * mirrors exactly what the server enforces.
1265 *
1266 * @return array<string, string>
1267 * @since 1.1.0
1268 */
1269 public static function get_resolved_validation_messages() {
1270 $defaults = self::default_validation_messages();
1271 $stored = Helper::get_suredonation_option( self::VALIDATION_MESSAGES_OPTION_KEY, [] );
1272
1273 if ( ! is_array( $stored ) ) {
1274 return $defaults;
1275 }
1276
1277 $resolved = $defaults;
1278 foreach ( $defaults as $key => $default ) {
1279 if ( ! empty( $stored[ $key ] ) && is_string( $stored[ $key ] ) ) {
1280 $resolved[ $key ] = $stored[ $key ];
1281 }
1282 }
1283
1284 return $resolved;
1285 }
1286
1287 /**
1288 * Apply the core validation rules for a single field value.
1289 *
1290 * @param string $block_name Block name.
1291 * @param array<string, mixed> $config Stored block configuration for the field.
1292 * @param string $value Submitted, trimmed field value.
1293 * @return string Error message, or '' when the value passes.
1294 * @since 1.1.0
1295 */
1296 private static function validate_field_value( $block_name, $config, $value ) {
1297 // Required check applies to every field type.
1298 if ( ! empty( $config['required'] ) && '' === $value ) {
1299 return self::resolve_required_message( $block_name, $config );
1300 }
1301
1302 // Format/range checks are skipped for empty optional values.
1303 if ( '' === $value ) {
1304 return '';
1305 }
1306
1307 switch ( $block_name ) {
1308 case 'suredonation/input':
1309 case 'suredonation/donor-comment':
1310 $max_length = isset( $config['max_length'] ) && is_numeric( $config['max_length'] ) ? (int) $config['max_length'] : 0;
1311 $length = function_exists( 'mb_strlen' ) ? mb_strlen( $value ) : strlen( $value );
1312 if ( $max_length > 0 && $length > $max_length ) {
1313 // str_replace (not sprintf) because the message is admin/translator
1314 // editable; a stray literal % would make sprintf throw on PHP 8.
1315 return str_replace( '%s', number_format_i18n( $max_length ), self::get_validation_message( 'suredonation_input_max_length' ) );
1316 }
1317 break;
1318
1319 case 'suredonation/email':
1320 if ( ! is_email( $value ) ) {
1321 if ( ! empty( $config['invalid_email_msg'] ) && is_string( $config['invalid_email_msg'] ) ) {
1322 return $config['invalid_email_msg'];
1323 }
1324 return self::get_validation_message( 'suredonation_valid_email' );
1325 }
1326
1327 $email_length_error = self::validate_email_length( $value );
1328 if ( '' !== $email_length_error ) {
1329 return $email_length_error;
1330 }
1331 break;
1332
1333 case 'suredonation/url':
1334 // Intentional dotted-host-only restriction (same as SureForms): the
1335 // value must be a domain with a TLD or an IPv4 host, with an optional
1336 // scheme, port, path, query and fragment. Bare single-label hosts
1337 // (localhost, intranet names, typos like "abcdef") are deliberately
1338 // rejected for a public "website" field. The 2048-byte cap
1339 // short-circuits before the regex on overlong, public, unauthenticated
1340 // input so its host-label sub-pattern cannot backtrack (ReDoS guard).
1341 // Kept in sync with the client check in src/form-frontend/validation.js.
1342 if ( strlen( $value ) > 2048 || ! preg_match( '#^(https?://)?((([a-z\d]([a-z\d-]*[a-z\d])*)\.)+[a-z]{2,}|((\d{1,3}\.){3}\d{1,3}))(:\d+)?(/[-a-z\d%_.~+]*)*(\?[;&a-z\d%_.~+=-]*)?(\#[-a-z\d_]*)?$#i', $value ) ) {
1343 if ( ! empty( $config['invalid_url_msg'] ) && is_string( $config['invalid_url_msg'] ) ) {
1344 return $config['invalid_url_msg'];
1345 }
1346 return self::get_validation_message( 'suredonation_valid_url' );
1347 }
1348 break;
1349
1350 case 'suredonation/phone':
1351 // Loose format check: digits plus the common phone punctuation,
1352 // 6–20 characters. The strict country-aware check happens client-side
1353 // via intl-tel-input; this guards against obviously bad submissions.
1354 if ( ! preg_match( '/^[\d\s()+.\-]{6,20}$/', $value ) ) {
1355 return self::get_validation_message( 'suredonation_valid_phone' );
1356 }
1357 break;
1358
1359 case 'suredonation/number':
1360 if ( ! is_numeric( $value ) ) {
1361 return self::get_validation_message( 'suredonation_valid_number' );
1362 }
1363
1364 $number = (float) $value;
1365
1366 if ( isset( $config['validation_min'] ) && is_numeric( $config['validation_min'] ) && $number < (float) $config['validation_min'] ) {
1367 return str_replace( '%s', self::format_number( (float) $config['validation_min'] ), self::get_validation_message( 'suredonation_input_min_value' ) );
1368 }
1369
1370 $validation_max = isset( $config['validation_max'] ) && is_numeric( $config['validation_max'] ) ? (float) $config['validation_max'] : 0.0;
1371 if ( $validation_max > 0 && $number > $validation_max ) {
1372 return str_replace( '%s', self::format_number( $validation_max ), self::get_validation_message( 'suredonation_input_max_value' ) );
1373 }
1374 break;
1375
1376 case 'suredonation/dropdown':
1377 $multi_select = ! empty( $config['multi_select'] );
1378 // Deduplicate before the min/max count check — the server is the
1379 // trust boundary, and a crafted "A|A|A" must not pass max_selection
1380 // (or min_selection) with a single distinct value.
1381 $selections = $multi_select
1382 ? array_values( array_unique( array_filter( array_map( 'trim', explode( '|', $value ) ), 'strlen' ) ) )
1383 : [ $value ];
1384
1385 // Reject values that are not among the configured options.
1386 $allowed = isset( $config['options'] ) && is_array( $config['options'] ) ? $config['options'] : [];
1387 if ( ! empty( $allowed ) ) {
1388 foreach ( $selections as $selection ) {
1389 if ( ! in_array( $selection, $allowed, true ) ) {
1390 return self::get_validation_message( 'suredonation_dropdown_invalid_option' );
1391 }
1392 }
1393 }
1394
1395 // Min/max apply to multi-select only.
1396 if ( $multi_select ) {
1397 $count = count( $selections );
1398 $min = isset( $config['min_selection'] ) ? (int) $config['min_selection'] : 0;
1399 $max = isset( $config['max_selection'] ) ? (int) $config['max_selection'] : 0;
1400
1401 if ( $min > 0 && $count < $min ) {
1402 return str_replace( '%s', number_format_i18n( $min ), self::get_validation_message( 'suredonation_dropdown_min_selection' ) );
1403 }
1404 if ( $max > 0 && $count > $max ) {
1405 return str_replace( '%s', number_format_i18n( $max ), self::get_validation_message( 'suredonation_dropdown_max_selection' ) );
1406 }
1407 }
1408 break;
1409 }
1410
1411 return '';
1412 }
1413
1414 /**
1415 * Enforce RFC 5321 length limits on an email value.
1416 *
1417 * The value is split on the last @ so the local part (before @, max 64) and
1418 * domain part (after @, max 255) are bounded separately. Limits are
1419 * overridable via the suredonation_email_field_char_limits filter.
1420 *
1421 * Public so the payment layer can length-cap the persisted donor_email
1422 * (which is separate from the validation-only fields[] copy this class
1423 * normally inspects). A value with no @ — possible when the caller has not
1424 * already run is_email() — is bounded by the local-part limit so oversized
1425 * junk still cannot be stored.
1426 *
1427 * @param string $value Submitted, trimmed email value.
1428 * @return string Error message, or '' when the value passes.
1429 * @since 1.1.1
1430 */
1431 public static function validate_email_length( $value ) {
1432 $defaults = [
1433 'local' => 64,
1434 'domain' => 255,
1435 ];
1436
1437 /**
1438 * Filter the RFC 5321 character limits enforced on the Email field.
1439 *
1440 * @since 1.1.1
1441 * @param array{local:int,domain:int} $limits Max characters for the local and domain parts.
1442 */
1443 $limits = apply_filters( 'suredonation_email_field_char_limits', $defaults );
1444
1445 // Fall back to defaults if the filter returns junk or non-positive values.
1446 $local_limit = is_array( $limits ) && isset( $limits['local'] ) && (int) $limits['local'] > 0 ? (int) $limits['local'] : $defaults['local'];
1447 $domain_limit = is_array( $limits ) && isset( $limits['domain'] ) && (int) $limits['domain'] > 0 ? (int) $limits['domain'] : $defaults['domain'];
1448
1449 $at = strrpos( $value, '@' );
1450 if ( false === $at ) {
1451 // No @ (caller did not run is_email first): bound the whole value by
1452 // the local-part limit so oversized junk cannot be persisted.
1453 $length = function_exists( 'mb_strlen' ) ? mb_strlen( $value ) : strlen( $value );
1454 if ( $length > $local_limit ) {
1455 return str_replace( '%s', number_format_i18n( $local_limit ), self::get_validation_message( 'suredonation_email_local_max_length' ) );
1456 }
1457 // Defensive total cap (see below): only reachable if a filter raised the
1458 // local limit past 254; keeps a no-@ value within the VARCHAR(255) column.
1459 if ( $length > 254 ) {
1460 return str_replace( '%s', number_format_i18n( 254 ), self::get_validation_message( 'suredonation_email_max_length' ) );
1461 }
1462 return '';
1463 }
1464
1465 $local_part = substr( $value, 0, $at );
1466 $domain_part = substr( $value, $at + 1 );
1467
1468 $local_length = function_exists( 'mb_strlen' ) ? mb_strlen( $local_part ) : strlen( $local_part );
1469 $domain_length = function_exists( 'mb_strlen' ) ? mb_strlen( $domain_part ) : strlen( $domain_part );
1470
1471 // str_replace (not sprintf) because the message is admin/translator
1472 // editable; a stray literal % would make sprintf throw on PHP 8.
1473 if ( $local_length > $local_limit ) {
1474 return str_replace( '%s', number_format_i18n( $local_limit ), self::get_validation_message( 'suredonation_email_local_max_length' ) );
1475 }
1476
1477 if ( $domain_length > $domain_limit ) {
1478 return str_replace( '%s', number_format_i18n( $domain_limit ), self::get_validation_message( 'suredonation_email_domain_max_length' ) );
1479 }
1480
1481 // RFC 5321 §4.5.3.1.3: the whole address may not exceed 254 chars. This is a
1482 // fixed cap (independent of the per-part filter) because it also guarantees
1483 // the value fits the VARCHAR(255) donor_email/email columns, which the
1484 // per-part caps alone do not — they sum to 320.
1485 if ( ( $local_length + 1 + $domain_length ) > 254 ) {
1486 return str_replace( '%s', number_format_i18n( 254 ), self::get_validation_message( 'suredonation_email_max_length' ) );
1487 }
1488
1489 return '';
1490 }
1491
1492 /**
1493 * Resolve the required-error message for a field.
1494 *
1495 * Resolution order: per-field custom message → global default for the field
1496 * type (Global Settings → Form Validation) → generic fallback. The message
1497 * key is derived from the block name by convention, so new field blocks need
1498 * no code change here — they only register their default message and tab
1499 * field (e.g. 'suredonation/phone' → 'suredonation_phone_block_required_text').
1500 *
1501 * @param string $block_name Block name.
1502 * @param array<string, mixed> $config Stored block configuration for the field.
1503 * @return string
1504 * @since 1.1.0
1505 */
1506 private static function resolve_required_message( $block_name, $config ) {
1507 if ( ! empty( $config['error_msg'] ) && is_string( $config['error_msg'] ) ) {
1508 return $config['error_msg'];
1509 }
1510
1511 $message = self::get_validation_message( self::required_message_key( $block_name ) );
1512
1513 return '' !== $message ? $message : __( 'This field is required.', 'suredonation' );
1514 }
1515
1516 /**
1517 * Derive the required-message key for a block name.
1518 *
1519 * 'suredonation/input' => 'suredonation_input_block_required_text'.
1520 *
1521 * @param string $block_name Block name.
1522 * @return string
1523 * @since 1.1.0
1524 */
1525 public static function required_message_key( $block_name ) {
1526 $short = str_replace( 'suredonation/', '', (string) $block_name );
1527 $short = (string) preg_replace( '/[^a-z0-9_]+/', '_', strtolower( $short ) );
1528
1529 return 'suredonation_' . $short . '_block_required_text';
1530 }
1531
1532 /**
1533 * Format a numeric bound for display in a validation message.
1534 *
1535 * Drops the decimal portion for whole numbers (e.g. 10.0 → "10").
1536 *
1537 * @param float $number Number to format.
1538 * @return string
1539 * @since 1.1.0
1540 */
1541 private static function format_number( $number ) {
1542 if ( floor( $number ) === $number ) {
1543 return number_format_i18n( $number );
1544 }
1545
1546 return number_format_i18n( $number, 2 );
1547 }
1548 }
1549