| 1 |
<?php |
| 2 |
/** |
| 3 |
* Signed same-site mode-switch destination intents for Booking Modes V3. |
| 4 |
* |
| 5 |
* @package Booking Calendar |
| 6 |
* @since 11.8.0 |
| 7 |
*/ |
| 8 |
|
| 9 |
if ( ! defined( 'ABSPATH' ) ) { |
| 10 |
exit; |
| 11 |
} |
| 12 |
|
| 13 |
/** |
| 14 |
* Create and validate a short-lived switch destination without persistent data. |
| 15 |
*/ |
| 16 |
final class WPBC_Booking_Modes_V3_Switch_Intent { |
| 17 |
|
| 18 |
/** @var int Maximum signed-intent lifetime in seconds. */ |
| 19 |
const LIFETIME = 120; |
| 20 |
|
| 21 |
/** @var int Maximum encoded intent length accepted from a request. */ |
| 22 |
const MAX_TOKEN_LENGTH = 4096; |
| 23 |
|
| 24 |
/** @var int Maximum fragment length retained after a mode switch. */ |
| 25 |
const MAX_FRAGMENT_LENGTH = 512; |
| 26 |
|
| 27 |
/** |
| 28 |
* Build the fixed administration landing URL for a validated mode switch. |
| 29 |
* |
| 30 |
* The destination and fragment are hints only. They are signed together with |
| 31 |
* the real user, effective owner, site, target mode, and expiry, then checked |
| 32 |
* again against normally contributed source metadata on the landing request. |
| 33 |
* |
| 34 |
* @param string $mode_id Saved target mode ID. |
| 35 |
* @param string $origin_url Browser-provided current administration URL. |
| 36 |
* @param string $fragment Browser-provided URL fragment without `#`. |
| 37 |
* |
| 38 |
* @return string|WP_Error Fixed signed landing URL, or an intent error. |
| 39 |
*/ |
| 40 |
public static function create_landing_url( $mode_id, $origin_url, $fragment = '' ) { |
| 41 |
$mode_id = is_scalar( $mode_id ) ? sanitize_key( (string) $mode_id ) : ''; |
| 42 |
if ( ! in_array( $mode_id, wpbc_booking_modes_get_allowed_mode_ids(), true ) ) { |
| 43 |
return new WP_Error( 'wpbc_booking_modes_intent_invalid_mode', __( 'The selected Booking Calendar administration mode is not available.', 'booking' ) ); |
| 44 |
} |
| 45 |
|
| 46 |
$context = wpbc_booking_modes_get_context(); |
| 47 |
$issued_at = time(); |
| 48 |
$payload = array( |
| 49 |
'version' => 1, |
| 50 |
'real_user_id' => absint( $context['real_user_id'] ), |
| 51 |
'owner_user_id' => absint( $context['owner_user_id'] ), |
| 52 |
'site_id' => self::get_current_site_id(), |
| 53 |
'mode_id' => $mode_id, |
| 54 |
'destination_url' => self::normalize_destination_url( $origin_url ), |
| 55 |
'fragment' => self::normalize_fragment( $fragment ), |
| 56 |
'issued_at' => $issued_at, |
| 57 |
'expires_at' => $issued_at + self::LIFETIME, |
| 58 |
); |
| 59 |
$encoded_json = wp_json_encode( $payload ); |
| 60 |
if ( ! is_string( $encoded_json ) || '' === $encoded_json ) { |
| 61 |
return new WP_Error( 'wpbc_booking_modes_intent_encode_failed', __( 'The mode destination could not be prepared.', 'booking' ) ); |
| 62 |
} |
| 63 |
|
| 64 |
$token = self::base64url_encode( $encoded_json ); |
| 65 |
$signature = self::sign( $token ); |
| 66 |
$landing = add_query_arg( |
| 67 |
array( |
| 68 |
'page' => 'wpbc', |
| 69 |
'wpbc_booking_mode_landing' => '1', |
| 70 |
'wpbc_booking_mode_intent' => $token, |
| 71 |
'wpbc_booking_mode_signature' => $signature, |
| 72 |
), |
| 73 |
admin_url( 'admin.php' ) |
| 74 |
); |
| 75 |
|
| 76 |
return wp_validate_redirect( $landing, admin_url( 'admin.php?page=wpbc' ) ); |
| 77 |
} |
| 78 |
|
| 79 |
/** |
| 80 |
* Validate and decode one signed intent in the current user/owner/site context. |
| 81 |
* |
| 82 |
* @param string $token Base64url-encoded JSON payload. |
| 83 |
* @param string $signature Hexadecimal HMAC signature. |
| 84 |
* |
| 85 |
* @return array<string,mixed>|WP_Error Normalized intent, or a validation error. |
| 86 |
*/ |
| 87 |
public static function validate( $token, $signature ) { |
| 88 |
$token = is_scalar( $token ) ? (string) $token : ''; |
| 89 |
$signature = is_scalar( $signature ) ? strtolower( (string) $signature ) : ''; |
| 90 |
if ( '' === $token || strlen( $token ) > self::MAX_TOKEN_LENGTH || 64 !== strlen( $signature ) || ! ctype_xdigit( $signature ) ) { |
| 91 |
return self::get_validation_error(); |
| 92 |
} |
| 93 |
if ( ! hash_equals( self::sign( $token ), $signature ) ) { |
| 94 |
return self::get_validation_error(); |
| 95 |
} |
| 96 |
|
| 97 |
$decoded_json = self::base64url_decode( $token ); |
| 98 |
$payload = is_string( $decoded_json ) ? json_decode( $decoded_json, true ) : null; |
| 99 |
$required = array( 'version', 'real_user_id', 'owner_user_id', 'site_id', 'mode_id', 'destination_url', 'fragment', 'issued_at', 'expires_at' ); |
| 100 |
if ( ! is_array( $payload ) || array_keys( $payload ) !== $required ) { |
| 101 |
return self::get_validation_error(); |
| 102 |
} |
| 103 |
|
| 104 |
$context = wpbc_booking_modes_get_context(); |
| 105 |
$mode_id = is_scalar( $payload['mode_id'] ) ? sanitize_key( (string) $payload['mode_id'] ) : ''; |
| 106 |
$issued_at = absint( $payload['issued_at'] ); |
| 107 |
$expires_at = absint( $payload['expires_at'] ); |
| 108 |
$now = time(); |
| 109 |
$is_context_valid = 1 === absint( $payload['version'] ) |
| 110 |
&& absint( $payload['real_user_id'] ) === absint( $context['real_user_id'] ) |
| 111 |
&& absint( $payload['owner_user_id'] ) === absint( $context['owner_user_id'] ) |
| 112 |
&& absint( $payload['site_id'] ) === self::get_current_site_id() |
| 113 |
&& $mode_id === wpbc_booking_modes_get_selected_mode_id() |
| 114 |
&& in_array( $mode_id, wpbc_booking_modes_get_allowed_mode_ids(), true ) |
| 115 |
&& $issued_at <= ( $now + 30 ) |
| 116 |
&& $expires_at >= $now |
| 117 |
&& $expires_at > $issued_at |
| 118 |
&& ( $expires_at - $issued_at ) <= self::LIFETIME; |
| 119 |
if ( ! $is_context_valid ) { |
| 120 |
return self::get_validation_error(); |
| 121 |
} |
| 122 |
|
| 123 |
$destination_url = self::normalize_destination_url( $payload['destination_url'] ); |
| 124 |
$fragment = self::normalize_fragment( $payload['fragment'] ); |
| 125 |
if ( (string) $payload['destination_url'] !== $destination_url || (string) $payload['fragment'] !== $fragment ) { |
| 126 |
return self::get_validation_error(); |
| 127 |
} |
| 128 |
|
| 129 |
$payload['mode_id'] = $mode_id; |
| 130 |
$payload['destination_url'] = $destination_url; |
| 131 |
$payload['fragment'] = $fragment; |
| 132 |
|
| 133 |
return $payload; |
| 134 |
} |
| 135 |
|
| 136 |
/** |
| 137 |
* Resolve an authorized final URL from a validated intent and source tree. |
| 138 |
* |
| 139 |
* The original route is preferred, including `wpbc-new`. When it is absent or |
| 140 |
* no longer openable, the target definition's default route and then Bookings |
| 141 |
* are checked. The released redirect filter may change the result only to |
| 142 |
* another eligible same-site administration route. |
| 143 |
* |
| 144 |
* @param array $intent Validated signed intent. |
| 145 |
* @param array $source_navigation Normally contributed source navigation. |
| 146 |
* |
| 147 |
* @return string Eligible same-site administration URL. |
| 148 |
*/ |
| 149 |
public static function resolve_destination( $intent, $source_navigation ) { |
| 150 |
$mode_id = isset( $intent['mode_id'] ) ? sanitize_key( (string) $intent['mode_id'] ) : ''; |
| 151 |
$source_navigation = is_array( $source_navigation ) ? $source_navigation : array(); |
| 152 |
$destination_url = isset( $intent['destination_url'] ) ? self::normalize_destination_url( $intent['destination_url'] ) : ''; |
| 153 |
$fragment = isset( $intent['fragment'] ) ? self::normalize_fragment( $intent['fragment'] ) : ''; |
| 154 |
$resolved_url = ''; |
| 155 |
|
| 156 |
if ( '' !== $destination_url && self::is_destination_eligible( $destination_url, $mode_id, $source_navigation ) ) { |
| 157 |
$resolved_url = $destination_url; |
| 158 |
} |
| 159 |
|
| 160 |
if ( '' === $resolved_url ) { |
| 161 |
$definition = WPBC_Booking_Modes_V3_Compatibility_Registry::get_instance()->get_compiler_definition( $mode_id ); |
| 162 |
if ( is_array( $definition ) && isset( $definition['default_route'] ) ) { |
| 163 |
$default_url = self::get_route_url( $definition['default_route'] ); |
| 164 |
if ( self::is_destination_eligible( $default_url, $mode_id, $source_navigation ) ) { |
| 165 |
$resolved_url = $default_url; |
| 166 |
} |
| 167 |
} |
| 168 |
} |
| 169 |
$bookings_url = admin_url( 'admin.php?page=wpbc&tab=vm_booking_listing' ); |
| 170 |
if ( '' === $resolved_url && self::is_destination_eligible( $bookings_url, $mode_id, $source_navigation ) ) { |
| 171 |
$resolved_url = $bookings_url; |
| 172 |
} |
| 173 |
if ( '' === $resolved_url ) { |
| 174 |
$resolved_url = admin_url( 'admin.php?page=wpbc' ); |
| 175 |
} |
| 176 |
|
| 177 |
$resolved_url = self::append_fragment( $resolved_url, $fragment ); |
| 178 |
$current_page_id = wpbc_booking_modes_get_canonical_page_id_from_url( $destination_url ); |
| 179 |
|
| 180 |
/** |
| 181 |
* Filter the server-selected URL used after a successful mode switch. |
| 182 |
* |
| 183 |
* The filtered URL is accepted only when it remains a same-site, non-mutating, |
| 184 |
* source-registered destination available to the target mode. |
| 185 |
* |
| 186 |
* @param string $resolved_url Proposed administration URL. |
| 187 |
* @param string $mode_id Target mode identifier. |
| 188 |
* @param string $current_page_id Original canonical page identifier. |
| 189 |
*/ |
| 190 |
$filtered_url = apply_filters( 'wpbc_booking_modes_switch_redirect_url', $resolved_url, $mode_id, $current_page_id ); |
| 191 |
$filtered_url = is_scalar( $filtered_url ) ? (string) $filtered_url : ''; |
| 192 |
$filtered_fragment = self::normalize_fragment( wp_parse_url( $filtered_url, PHP_URL_FRAGMENT ) ); |
| 193 |
$filtered_base = self::normalize_destination_url( $filtered_url ); |
| 194 |
if ( '' !== $filtered_base && self::is_destination_eligible( $filtered_base, $mode_id, $source_navigation ) ) { |
| 195 |
return self::append_fragment( $filtered_base, $filtered_fragment ); |
| 196 |
} |
| 197 |
|
| 198 |
return $resolved_url; |
| 199 |
} |
| 200 |
|
| 201 |
/** |
| 202 |
* Normalize a same-site, non-mutating Booking Calendar administration URL. |
| 203 |
* |
| 204 |
* @param mixed $candidate_url Untrusted destination candidate. |
| 205 |
* |
| 206 |
* @return string Normalized URL without a fragment, or an empty string. |
| 207 |
*/ |
| 208 |
public static function normalize_destination_url( $candidate_url ) { |
| 209 |
$candidate_url = is_scalar( $candidate_url ) ? wp_validate_redirect( (string) $candidate_url, '' ) : ''; |
| 210 |
if ( '' === $candidate_url ) { |
| 211 |
return ''; |
| 212 |
} |
| 213 |
|
| 214 |
$admin_base = admin_url( 'admin.php' ); |
| 215 |
$candidate_host = strtolower( (string) wp_parse_url( $candidate_url, PHP_URL_HOST ) ); |
| 216 |
$admin_host = strtolower( (string) wp_parse_url( $admin_base, PHP_URL_HOST ) ); |
| 217 |
$candidate_path = (string) wp_parse_url( $candidate_url, PHP_URL_PATH ); |
| 218 |
$admin_path = (string) wp_parse_url( $admin_base, PHP_URL_PATH ); |
| 219 |
$candidate_port = absint( wp_parse_url( $candidate_url, PHP_URL_PORT ) ); |
| 220 |
$admin_port = absint( wp_parse_url( $admin_base, PHP_URL_PORT ) ); |
| 221 |
$candidate_scheme = strtolower( (string) wp_parse_url( $candidate_url, PHP_URL_SCHEME ) ); |
| 222 |
$admin_scheme = strtolower( (string) wp_parse_url( $admin_base, PHP_URL_SCHEME ) ); |
| 223 |
if ( $candidate_host !== $admin_host || $candidate_path !== $admin_path || $candidate_port !== $admin_port || $candidate_scheme !== $admin_scheme ) { |
| 224 |
return ''; |
| 225 |
} |
| 226 |
|
| 227 |
$query_string = wp_parse_url( $candidate_url, PHP_URL_QUERY ); |
| 228 |
$query_args = array(); |
| 229 |
if ( ! is_string( $query_string ) ) { |
| 230 |
return ''; |
| 231 |
} |
| 232 |
wp_parse_str( $query_string, $query_args ); |
| 233 |
$page_slug = isset( $query_args['page'] ) && is_scalar( $query_args['page'] ) ? sanitize_key( (string) $query_args['page'] ) : ''; |
| 234 |
if ( 0 !== strpos( $page_slug, 'wpbc' ) || 'wpbc-log-off' === $page_slug ) { |
| 235 |
return ''; |
| 236 |
} |
| 237 |
|
| 238 |
$blocked_keys = array( '_wpnonce', '_wp_http_referer', 'action', 'action2', 'nonce', 'security', 'wpbc_booking_mode_landing', 'wpbc_booking_mode_intent', 'wpbc_booking_mode_signature' ); |
| 239 |
foreach ( $blocked_keys as $blocked_key ) { |
| 240 |
if ( array_key_exists( $blocked_key, $query_args ) ) { |
| 241 |
return ''; |
| 242 |
} |
| 243 |
} |
| 244 |
|
| 245 |
$normalized_args = array(); |
| 246 |
foreach ( array_slice( $query_args, 0, 64, true ) as $query_key => $query_value ) { |
| 247 |
$normalized_key = is_scalar( $query_key ) ? sanitize_key( (string) $query_key ) : ''; |
| 248 |
if ( '' === $normalized_key || $normalized_key !== (string) $query_key ) { |
| 249 |
continue; |
| 250 |
} |
| 251 |
$normalized_args[ $normalized_key ] = self::normalize_query_value( $query_value ); |
| 252 |
} |
| 253 |
$normalized_args['page'] = $page_slug; |
| 254 |
foreach ( array( 'tab', 'subtab' ) as $route_key ) { |
| 255 |
if ( isset( $normalized_args[ $route_key ] ) ) { |
| 256 |
$normalized_args[ $route_key ] = sanitize_key( (string) $normalized_args[ $route_key ] ); |
| 257 |
} |
| 258 |
} |
| 259 |
|
| 260 |
$normalized_url = add_query_arg( $normalized_args, $admin_base ); |
| 261 |
|
| 262 |
return wp_validate_redirect( $normalized_url, '' ); |
| 263 |
} |
| 264 |
|
| 265 |
/** |
| 266 |
* Normalize an explicitly supplied browser URL fragment. |
| 267 |
* |
| 268 |
* @param mixed $fragment Untrusted fragment, with or without a leading `#`. |
| 269 |
* |
| 270 |
* @return string Safe fragment without a leading `#`. |
| 271 |
*/ |
| 272 |
public static function normalize_fragment( $fragment ) { |
| 273 |
$fragment = is_scalar( $fragment ) ? ltrim( (string) $fragment, '#' ) : ''; |
| 274 |
$fragment = preg_replace( '/[\x00-\x20\x7F]/', '', $fragment ); |
| 275 |
$fragment = preg_replace( '/[^A-Za-z0-9_\-:.\/=%&?]/', '', (string) $fragment ); |
| 276 |
|
| 277 |
return substr( (string) $fragment, 0, self::MAX_FRAGMENT_LENGTH ); |
| 278 |
} |
| 279 |
|
| 280 |
/** |
| 281 |
* Determine whether a destination exists in source metadata and target mode. |
| 282 |
* |
| 283 |
* @param string $destination_url Normalized administration URL. |
| 284 |
* @param string $mode_id Target mode ID. |
| 285 |
* @param array $source_navigation Normally contributed navigation tree. |
| 286 |
* |
| 287 |
* @return bool True when the controller route remains available. |
| 288 |
*/ |
| 289 |
private static function is_destination_eligible( $destination_url, $mode_id, $source_navigation ) { |
| 290 |
$route = self::get_route_from_url( $destination_url ); |
| 291 |
if ( empty( $route ) ) { |
| 292 |
return false; |
| 293 |
} |
| 294 |
if ( 'wpbc-new' === $route['page'] ) { |
| 295 |
$route = self::get_add_alias_route( $mode_id ); |
| 296 |
} |
| 297 |
$route = self::resolve_default_route( $route, $source_navigation ); |
| 298 |
if ( empty( $route ) ) { |
| 299 |
return false; |
| 300 |
} |
| 301 |
|
| 302 |
$source_index = WPBC_Booking_Modes_V3_Source_Index::get_instance(); |
| 303 |
$source_index->capture( $source_navigation ); |
| 304 |
if ( null === $source_index->get_record( $route ) ) { |
| 305 |
return false; |
| 306 |
} |
| 307 |
|
| 308 |
$mode = wpbc_booking_modes_get_mode( $mode_id ); |
| 309 |
if ( ! is_array( $mode ) ) { |
| 310 |
return false; |
| 311 |
} |
| 312 |
$canonical_page_id = wpbc_booking_modes_get_canonical_page_id_for_route( $route['page'], $route['tab'], $route['subtab'] ); |
| 313 |
if ( '' !== $canonical_page_id && isset( $mode['pages'][ $canonical_page_id ] ) ) { |
| 314 |
return true; |
| 315 |
} |
| 316 |
|
| 317 |
return ! empty( $mode['preserve_unmapped_pages'] ); |
| 318 |
} |
| 319 |
|
| 320 |
/** |
| 321 |
* Resolve a page's default registered tab when the URL omits one. |
| 322 |
* |
| 323 |
* @param array $route Parsed page, tab, and subtab route. |
| 324 |
* @param array $source_navigation Normally contributed source navigation. |
| 325 |
* |
| 326 |
* @return array<string,string> Resolved route, or an empty array. |
| 327 |
*/ |
| 328 |
private static function resolve_default_route( $route, $source_navigation ) { |
| 329 |
if ( ! isset( $source_navigation[ $route['page'] ] ) || ! is_array( $source_navigation[ $route['page'] ] ) ) { |
| 330 |
return array(); |
| 331 |
} |
| 332 |
if ( '' !== $route['tab'] ) { |
| 333 |
return $route; |
| 334 |
} |
| 335 |
|
| 336 |
$first_tab = ''; |
| 337 |
foreach ( $source_navigation[ $route['page'] ] as $tab_slug => $tab ) { |
| 338 |
if ( ! is_array( $tab ) ) { |
| 339 |
continue; |
| 340 |
} |
| 341 |
if ( '' === $first_tab ) { |
| 342 |
$first_tab = sanitize_key( (string) $tab_slug ); |
| 343 |
} |
| 344 |
if ( ! empty( $tab['default'] ) ) { |
| 345 |
$route['tab'] = sanitize_key( (string) $tab_slug ); |
| 346 |
return $route; |
| 347 |
} |
| 348 |
} |
| 349 |
$route['tab'] = $first_tab; |
| 350 |
|
| 351 |
return '' !== $first_tab ? $route : array(); |
| 352 |
} |
| 353 |
|
| 354 |
/** |
| 355 |
* Convert the released native Add-page alias to the target mode route. |
| 356 |
* |
| 357 |
* @param string $mode_id Target mode ID. |
| 358 |
* |
| 359 |
* @return array<string,string> Existing Add Appointment or Add Booking route. |
| 360 |
*/ |
| 361 |
private static function get_add_alias_route( $mode_id ) { |
| 362 |
$page_id = 'appointment' === $mode_id ? 'wpbc__add-appointment' : 'wpbc__add-booking'; |
| 363 |
$page = wpbc_booking_modes_get_canonical_page( $page_id ); |
| 364 |
|
| 365 |
return is_array( $page ) |
| 366 |
? array( 'page' => $page['page'], 'tab' => $page['tab'], 'subtab' => $page['subtab'] ) |
| 367 |
: array(); |
| 368 |
} |
| 369 |
|
| 370 |
/** |
| 371 |
* Parse a normalized administration URL into its route identifiers. |
| 372 |
* |
| 373 |
* @param string $destination_url Normalized administration URL. |
| 374 |
* |
| 375 |
* @return array<string,string> Page, tab, and subtab, or an empty array. |
| 376 |
*/ |
| 377 |
private static function get_route_from_url( $destination_url ) { |
| 378 |
$query_string = wp_parse_url( $destination_url, PHP_URL_QUERY ); |
| 379 |
$query_args = array(); |
| 380 |
if ( ! is_string( $query_string ) ) { |
| 381 |
return array(); |
| 382 |
} |
| 383 |
wp_parse_str( $query_string, $query_args ); |
| 384 |
$page = isset( $query_args['page'] ) && is_scalar( $query_args['page'] ) ? sanitize_key( (string) $query_args['page'] ) : ''; |
| 385 |
if ( '' === $page || 'wpbc-log-off' === $page ) { |
| 386 |
return array(); |
| 387 |
} |
| 388 |
|
| 389 |
return array( |
| 390 |
'page' => $page, |
| 391 |
'tab' => isset( $query_args['tab'] ) && is_scalar( $query_args['tab'] ) ? sanitize_key( (string) $query_args['tab'] ) : '', |
| 392 |
'subtab' => isset( $query_args['subtab'] ) && is_scalar( $query_args['subtab'] ) ? sanitize_key( (string) $query_args['subtab'] ) : '', |
| 393 |
); |
| 394 |
} |
| 395 |
|
| 396 |
/** |
| 397 |
* Build an administration URL for a declaration route. |
| 398 |
* |
| 399 |
* @param array $route Page, tab, and optional subtab identifiers. |
| 400 |
* |
| 401 |
* @return string Same-site administration URL, or an empty string. |
| 402 |
*/ |
| 403 |
private static function get_route_url( $route ) { |
| 404 |
if ( ! is_array( $route ) || empty( $route['page'] ) ) { |
| 405 |
return ''; |
| 406 |
} |
| 407 |
$query_args = array( 'page' => sanitize_key( (string) $route['page'] ) ); |
| 408 |
if ( ! empty( $route['tab'] ) ) { |
| 409 |
$query_args['tab'] = sanitize_key( (string) $route['tab'] ); |
| 410 |
} |
| 411 |
if ( ! empty( $route['subtab'] ) ) { |
| 412 |
$query_args['subtab'] = sanitize_key( (string) $route['subtab'] ); |
| 413 |
} |
| 414 |
|
| 415 |
return self::normalize_destination_url( add_query_arg( $query_args, admin_url( 'admin.php' ) ) ); |
| 416 |
} |
| 417 |
|
| 418 |
/** |
| 419 |
* Normalize a scalar or one-level array query value. |
| 420 |
* |
| 421 |
* @param mixed $query_value Parsed query value. |
| 422 |
* |
| 423 |
* @return string|array Sanitized query value. |
| 424 |
*/ |
| 425 |
private static function normalize_query_value( $query_value ) { |
| 426 |
if ( is_array( $query_value ) ) { |
| 427 |
$normalized = array(); |
| 428 |
foreach ( array_slice( $query_value, 0, 32, true ) as $value_key => $nested_value ) { |
| 429 |
if ( ! is_scalar( $nested_value ) ) { |
| 430 |
continue; |
| 431 |
} |
| 432 |
$normalized_key = is_int( $value_key ) ? $value_key : sanitize_key( (string) $value_key ); |
| 433 |
$normalized[ $normalized_key ] = sanitize_text_field( (string) $nested_value ); |
| 434 |
} |
| 435 |
|
| 436 |
return $normalized; |
| 437 |
} |
| 438 |
|
| 439 |
return is_scalar( $query_value ) ? sanitize_text_field( (string) $query_value ) : ''; |
| 440 |
} |
| 441 |
|
| 442 |
/** |
| 443 |
* Append a validated fragment without changing the server route. |
| 444 |
* |
| 445 |
* @param string $destination_url Normalized URL without a fragment. |
| 446 |
* @param string $fragment Validated fragment without `#`. |
| 447 |
* |
| 448 |
* @return string URL with the optional fragment. |
| 449 |
*/ |
| 450 |
private static function append_fragment( $destination_url, $fragment ) { |
| 451 |
$fragment = self::normalize_fragment( $fragment ); |
| 452 |
|
| 453 |
return '' !== $fragment ? $destination_url . '#' . $fragment : $destination_url; |
| 454 |
} |
| 455 |
|
| 456 |
/** |
| 457 |
* Return the current multisite-aware site identifier. |
| 458 |
* |
| 459 |
* @return int Current WordPress blog ID. |
| 460 |
*/ |
| 461 |
private static function get_current_site_id() { |
| 462 |
return function_exists( 'get_current_blog_id' ) ? absint( get_current_blog_id() ) : 0; |
| 463 |
} |
| 464 |
|
| 465 |
/** |
| 466 |
* Sign one encoded intent with the site's WordPress nonce salt. |
| 467 |
* |
| 468 |
* @param string $token Encoded intent token. |
| 469 |
* |
| 470 |
* @return string Hexadecimal SHA-256 HMAC. |
| 471 |
*/ |
| 472 |
private static function sign( $token ) { |
| 473 |
return hash_hmac( 'sha256', (string) $token, wp_salt( 'nonce' ) ); |
| 474 |
} |
| 475 |
|
| 476 |
/** |
| 477 |
* Encode bytes using unpadded URL-safe Base64. |
| 478 |
* |
| 479 |
* @param string $bytes Raw bytes. |
| 480 |
* |
| 481 |
* @return string URL-safe encoded value. |
| 482 |
*/ |
| 483 |
private static function base64url_encode( $bytes ) { |
| 484 |
return rtrim( strtr( base64_encode( $bytes ), '+/', '-_' ), '=' ); |
| 485 |
} |
| 486 |
|
| 487 |
/** |
| 488 |
* Decode unpadded URL-safe Base64 with strict validation. |
| 489 |
* |
| 490 |
* @param string $encoded Encoded token. |
| 491 |
* |
| 492 |
* @return string|false Decoded bytes, or false for malformed input. |
| 493 |
*/ |
| 494 |
private static function base64url_decode( $encoded ) { |
| 495 |
if ( 1 === strlen( $encoded ) % 4 || ! preg_match( '/^[A-Za-z0-9_-]+$/', $encoded ) ) { |
| 496 |
return false; |
| 497 |
} |
| 498 |
$padding = ( 4 - ( strlen( $encoded ) % 4 ) ) % 4; |
| 499 |
|
| 500 |
return base64_decode( strtr( $encoded, '-_', '+/' ) . str_repeat( '=', $padding ), true ); |
| 501 |
} |
| 502 |
|
| 503 |
/** |
| 504 |
* Build the deliberately generic signed-intent validation error. |
| 505 |
* |
| 506 |
* @return WP_Error Invalid or expired intent error. |
| 507 |
*/ |
| 508 |
private static function get_validation_error() { |
| 509 |
return new WP_Error( 'wpbc_booking_modes_intent_invalid', __( 'The mode destination expired or is no longer valid.', 'booking' ) ); |
| 510 |
} |
| 511 |
} |
| 512 |
|
