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| 1 | <?php |
| 2 | /** |
| 3 | * Podcast settings: option schema, sanitizers, and Jetpack Sync opt-in. |
| 4 | * |
| 5 | * @package automattic/jetpack-podcast |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack\Podcast; |
| 9 | |
| 10 | /** |
| 11 | * Registers the `podcasting_*` options with their `sanitize_callback`s so writes |
| 12 | * through any path stay validated. The dashboard reads and writes them through the |
| 13 | * dedicated {@see Podcast_Settings_Endpoint} (`wpcom/v2/podcast/settings`); they |
| 14 | * are intentionally not exposed through core `/wp/v2/settings`. |
| 15 | * |
| 16 | * Array-shaped options merge against stored values on sanitize, not replace — |
| 17 | * the SPA can PATCH partial entries without losing the rest. |
| 18 | */ |
| 19 | class Settings { |
| 20 | |
| 21 | /** |
| 22 | * Per-podcatcher hostname allowlist for `podcasting_show_urls`. `www.` is |
| 23 | * stripped before comparison. |
| 24 | * |
| 25 | * @var array<string, string[]> |
| 26 | */ |
| 27 | const SHOW_URL_HOSTS = array( |
| 28 | 'pocketcasts' => array( 'pca.st', 'pocketcasts.com' ), |
| 29 | 'apple' => array( 'podcasts.apple.com' ), |
| 30 | 'spotify' => array( 'open.spotify.com' ), |
| 31 | 'youtube' => array( 'youtube.com', 'm.youtube.com', 'youtu.be', 'music.youtube.com' ), |
| 32 | 'amazon' => array( |
| 33 | 'music.amazon.com', |
| 34 | 'music.amazon.co.uk', |
| 35 | 'music.amazon.de', |
| 36 | 'music.amazon.co.jp', |
| 37 | 'music.amazon.com.au', |
| 38 | 'music.amazon.fr', |
| 39 | 'music.amazon.ca', |
| 40 | 'music.amazon.es', |
| 41 | ), |
| 42 | 'podcastindex' => array( 'podcastindex.org' ), |
| 43 | ); |
| 44 | |
| 45 | const SHOW_URL_MAX_LENGTH = 2048; |
| 46 | |
| 47 | /** |
| 48 | * Fallback when neither `podcasting_feed_limit` nor `posts_per_rss` is set. |
| 49 | */ |
| 50 | const FEED_LIMIT_DEFAULT = 300; |
| 51 | |
| 52 | /** |
| 53 | * Ceiling for `podcasting_feed_limit`. Sized against measured feed generation. |
| 54 | */ |
| 55 | const FEED_LIMIT_MAX = 500; |
| 56 | |
| 57 | /** |
| 58 | * Drives `register_settings()` and the sync whitelist. |
| 59 | * |
| 60 | * @var string[] |
| 61 | */ |
| 62 | const OPTION_NAMES = array( |
| 63 | 'podcasting_category_id', |
| 64 | 'podcasting_title', |
| 65 | 'podcasting_talent_name', |
| 66 | 'podcasting_summary', |
| 67 | 'podcasting_copyright', |
| 68 | 'podcasting_explicit', |
| 69 | 'podcasting_image', |
| 70 | 'podcasting_image_id', |
| 71 | 'podcasting_category_1', |
| 72 | 'podcasting_category_2', |
| 73 | 'podcasting_category_3', |
| 74 | 'podcasting_email', |
| 75 | 'podcasting_show_urls', |
| 76 | 'podcasting_show_states', |
| 77 | 'podcasting_feed_limit', |
| 78 | ); |
| 79 | |
| 80 | /** |
| 81 | * Wire option registrations + Jetpack Sync opt-in. Idempotent: every |
| 82 | * callback is named, so WordPress dedupes repeat calls. |
| 83 | */ |
| 84 | public static function register() { |
| 85 | add_action( 'admin_init', array( __CLASS__, 'register_settings' ) ); |
| 86 | add_action( 'rest_api_init', array( __CLASS__, 'register_settings' ) ); |
| 87 | add_filter( 'jetpack_sync_options_whitelist', array( __CLASS__, 'add_to_sync_whitelist' ) ); |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Add the podcast options to the Jetpack Sync whitelist. |
| 92 | * |
| 93 | * @param string[] $options Whitelisted option names. |
| 94 | * @return string[] |
| 95 | */ |
| 96 | public static function add_to_sync_whitelist( $options ) { |
| 97 | return array_merge( $options, self::OPTION_NAMES ); |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * `register_setting()` calls. Hooked on `admin_init` and `rest_api_init`. |
| 102 | */ |
| 103 | public static function register_settings() { |
| 104 | $media_settings = array( |
| 105 | array( 'podcasting_category_id', 'integer', 0, 'absint' ), |
| 106 | array( 'podcasting_title', 'string', '', 'sanitize_text_field' ), |
| 107 | array( 'podcasting_talent_name', 'string', '', 'sanitize_text_field' ), |
| 108 | array( 'podcasting_summary', 'string', '', 'sanitize_textarea_field' ), |
| 109 | array( 'podcasting_copyright', 'string', '', 'sanitize_text_field' ), |
| 110 | array( 'podcasting_category_1', 'string', '', 'sanitize_text_field' ), |
| 111 | array( 'podcasting_category_2', 'string', '', 'sanitize_text_field' ), |
| 112 | array( 'podcasting_category_3', 'string', '', 'sanitize_text_field' ), |
| 113 | ); |
| 114 | |
| 115 | // Registered under WP core's `media` group to match WPCOM's legacy Media |
| 116 | // Settings form, so it keeps accepting these. |
| 117 | foreach ( $media_settings as list( $name, $type, $default, $sanitize ) ) { |
| 118 | register_setting( |
| 119 | 'media', |
| 120 | $name, |
| 121 | array( |
| 122 | 'type' => $type, |
| 123 | 'default' => $default, |
| 124 | 'sanitize_callback' => $sanitize, |
| 125 | ) |
| 126 | ); |
| 127 | } |
| 128 | |
| 129 | register_setting( |
| 130 | 'media', |
| 131 | 'podcasting_image', |
| 132 | array( |
| 133 | 'type' => 'string', |
| 134 | 'default' => '', |
| 135 | 'sanitize_callback' => 'esc_url_raw', |
| 136 | ) |
| 137 | ); |
| 138 | |
| 139 | register_setting( |
| 140 | 'media', |
| 141 | 'podcasting_explicit', |
| 142 | array( |
| 143 | 'type' => 'boolean', |
| 144 | 'default' => false, |
| 145 | 'sanitize_callback' => array( __CLASS__, 'sanitize_explicit' ), |
| 146 | ) |
| 147 | ); |
| 148 | |
| 149 | // Registered under WP core's `options` group: settings WPCOM never wired |
| 150 | // into a Settings API form. |
| 151 | register_setting( |
| 152 | 'options', |
| 153 | 'podcasting_email', |
| 154 | array( |
| 155 | 'type' => 'string', |
| 156 | 'default' => '', |
| 157 | 'sanitize_callback' => 'sanitize_email', |
| 158 | ) |
| 159 | ); |
| 160 | |
| 161 | register_setting( |
| 162 | 'options', |
| 163 | 'podcasting_image_id', |
| 164 | array( |
| 165 | 'type' => 'integer', |
| 166 | 'default' => 0, |
| 167 | 'sanitize_callback' => 'absint', |
| 168 | ) |
| 169 | ); |
| 170 | |
| 171 | register_setting( |
| 172 | 'options', |
| 173 | 'podcasting_show_urls', |
| 174 | array( |
| 175 | 'type' => 'object', |
| 176 | 'default' => array(), |
| 177 | 'sanitize_callback' => array( __CLASS__, 'sanitize_show_urls' ), |
| 178 | ) |
| 179 | ); |
| 180 | |
| 181 | register_setting( |
| 182 | 'options', |
| 183 | 'podcasting_show_states', |
| 184 | array( |
| 185 | 'type' => 'object', |
| 186 | 'default' => array(), |
| 187 | 'sanitize_callback' => array( __CLASS__, 'sanitize_show_states' ), |
| 188 | ) |
| 189 | ); |
| 190 | |
| 191 | // Default is the unset sentinel, not `FEED_LIMIT_DEFAULT`: `update_option()` |
| 192 | // compares against the default-backed read and bails before creating the |
| 193 | // row, so any other default would make that exact value unsavable. |
| 194 | register_setting( |
| 195 | 'options', |
| 196 | 'podcasting_feed_limit', |
| 197 | array( |
| 198 | 'type' => 'integer', |
| 199 | 'default' => 0, |
| 200 | 'sanitize_callback' => array( __CLASS__, 'sanitize_feed_limit' ), |
| 201 | ) |
| 202 | ); |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * Stable, fully-padded settings payload for the REST endpoint. Every |
| 207 | * `OPTION_NAMES` key is present; the two podcatcher maps are padded to all |
| 208 | * known directories with empty strings so the SPA always sees a fixed shape. |
| 209 | * |
| 210 | * @return array<string, mixed> |
| 211 | */ |
| 212 | public static function get_all(): array { |
| 213 | $empty_map = array_fill_keys( array_keys( self::SHOW_URL_HOSTS ), '' ); |
| 214 | $show_urls = (array) get_option( 'podcasting_show_urls', array() ); |
| 215 | $show_states = (array) get_option( 'podcasting_show_states', array() ); |
| 216 | |
| 217 | return array( |
| 218 | 'podcasting_category_id' => (int) get_option( 'podcasting_category_id', 0 ), |
| 219 | 'podcasting_title' => (string) get_option( 'podcasting_title', '' ), |
| 220 | 'podcasting_talent_name' => (string) get_option( 'podcasting_talent_name', '' ), |
| 221 | 'podcasting_summary' => (string) get_option( 'podcasting_summary', '' ), |
| 222 | 'podcasting_copyright' => (string) get_option( 'podcasting_copyright', '' ), |
| 223 | 'podcasting_explicit' => self::sanitize_explicit( get_option( 'podcasting_explicit', false ) ), |
| 224 | 'podcasting_image' => self::raw_show_image_url(), |
| 225 | 'podcasting_image_id' => (int) get_option( 'podcasting_image_id', 0 ), |
| 226 | 'podcasting_category_1' => (string) get_option( 'podcasting_category_1', '' ), |
| 227 | 'podcasting_category_2' => (string) get_option( 'podcasting_category_2', '' ), |
| 228 | 'podcasting_category_3' => (string) get_option( 'podcasting_category_3', '' ), |
| 229 | 'podcasting_email' => (string) get_option( 'podcasting_email', '' ), |
| 230 | 'podcasting_show_urls' => array_merge( $empty_map, array_intersect_key( $show_urls, $empty_map ) ), |
| 231 | 'podcasting_show_states' => array_merge( $empty_map, array_intersect_key( $show_states, $empty_map ) ), |
| 232 | 'podcasting_feed_limit' => self::feed_limit(), |
| 233 | 'podcasting_feed_url' => self::feed_url(), |
| 234 | ); |
| 235 | } |
| 236 | |
| 237 | /** |
| 238 | * Episodes the podcast feed should carry. Until the site sets one this seeds |
| 239 | * from core's `posts_per_rss`, so existing feeds keep their current length. |
| 240 | * |
| 241 | * Sanitized on read because Sync writes on shadow blogs never hit the |
| 242 | * registered `sanitize_callback`. |
| 243 | * |
| 244 | * @return int |
| 245 | */ |
| 246 | public static function feed_limit(): int { |
| 247 | return self::sanitize_feed_limit( get_option( 'podcasting_feed_limit', 0 ) ); |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * Canonical RSS feed URL for the configured podcast category. Derived |
| 252 | * read-only field on the settings payload — not a stored option. |
| 253 | * |
| 254 | * Built with WordPress's own {@see get_term_feed_link()} so it stays correct |
| 255 | * across every permalink structure (pretty, plain `?cat=N`, no trailing |
| 256 | * slash) and is identical on WPCOM and self-hosted. This is the URL the |
| 257 | * category feed is actually served at — the SPA must not reconstruct it by |
| 258 | * string-appending `feed/` to the archive link. |
| 259 | * |
| 260 | * @return string Feed URL, or '' when no valid category is configured. |
| 261 | */ |
| 262 | public static function feed_url(): string { |
| 263 | $category_id = (int) get_option( 'podcasting_category_id', 0 ); |
| 264 | if ( $category_id <= 0 ) { |
| 265 | return ''; |
| 266 | } |
| 267 | $link = get_term_feed_link( $category_id, 'category' ); |
| 268 | if ( false === $link ) { |
| 269 | return ''; |
| 270 | } |
| 271 | // get_term_feed_link() HTML-escapes the query separator (`&`) in the |
| 272 | // plain-permalink form because core builds it for HTML attributes. The |
| 273 | // dashboard copies this straight into a directory submission field, so |
| 274 | // decode it back to a literal URL — otherwise `?feed=rss2&cat=N` loses |
| 275 | // the `cat` filter and serves the whole-site feed instead of the category. |
| 276 | return html_entity_decode( $link, ENT_QUOTES ); |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * Per-key type map for the endpoint's update args. Type coercion only — the |
| 281 | * registered `sanitize_callback`s do the real validation on write, so a single |
| 282 | * bad field can't 400 the whole partial patch. |
| 283 | * |
| 284 | * @return array<string, array<string, mixed>> |
| 285 | */ |
| 286 | public static function rest_schema_properties(): array { |
| 287 | return array( |
| 288 | 'podcasting_category_id' => array( 'type' => 'integer' ), |
| 289 | 'podcasting_title' => array( 'type' => 'string' ), |
| 290 | 'podcasting_talent_name' => array( 'type' => 'string' ), |
| 291 | 'podcasting_summary' => array( 'type' => 'string' ), |
| 292 | 'podcasting_copyright' => array( 'type' => 'string' ), |
| 293 | 'podcasting_explicit' => array( 'type' => array( 'boolean', 'string' ) ), |
| 294 | 'podcasting_image' => array( 'type' => 'string' ), |
| 295 | 'podcasting_image_id' => array( 'type' => 'integer' ), |
| 296 | 'podcasting_category_1' => array( 'type' => 'string' ), |
| 297 | 'podcasting_category_2' => array( 'type' => 'string' ), |
| 298 | 'podcasting_category_3' => array( 'type' => 'string' ), |
| 299 | 'podcasting_email' => array( 'type' => 'string' ), |
| 300 | 'podcasting_show_urls' => array( 'type' => 'object' ), |
| 301 | 'podcasting_show_states' => array( 'type' => 'object' ), |
| 302 | 'podcasting_feed_limit' => array( 'type' => 'integer' ), |
| 303 | ); |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * Show cover image URL: `podcasting_image_id` resolved to its attachment |
| 308 | * URL when it points at an image, otherwise the raw `podcasting_image` |
| 309 | * option. Never Photon-routed — feed rendering applies its own resize. |
| 310 | * |
| 311 | * @return string Image URL, or '' when not configured. |
| 312 | */ |
| 313 | public static function raw_show_image_url(): string { |
| 314 | $image_id = (int) get_option( 'podcasting_image_id', 0 ); |
| 315 | if ( $image_id > 0 && wp_attachment_is_image( $image_id ) ) { |
| 316 | $url = wp_get_attachment_url( $image_id ); |
| 317 | if ( false !== $url ) { |
| 318 | return $url; |
| 319 | } |
| 320 | } |
| 321 | return (string) get_option( 'podcasting_image', '' ); |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * `'yes'` (any case) or boolean true → true; everything else → false. The |
| 326 | * feed only emits true/false; the legacy `'clean'` value collapses to false |
| 327 | * because the WPCOM feed builder already treats it that way. |
| 328 | * |
| 329 | * @param mixed $value Raw input. |
| 330 | * @return bool |
| 331 | */ |
| 332 | public static function sanitize_explicit( $value ) { |
| 333 | if ( is_string( $value ) ) { |
| 334 | return in_array( strtolower( $value ), array( 'yes', 'true', '1' ), true ); |
| 335 | } |
| 336 | return true === $value || 1 === $value; |
| 337 | } |
| 338 | |
| 339 | /** |
| 340 | * Clamp the feed episode limit to 1–{@see self::feed_limit_max()}. Cleared and |
| 341 | * junk input resolves the way an unset option does — the site's own |
| 342 | * `posts_per_rss` — rather than emptying the feed or jumping it to a default |
| 343 | * far above whatever the site was already serving. |
| 344 | * |
| 345 | * @param mixed $value Raw input. |
| 346 | * @return int |
| 347 | */ |
| 348 | public static function sanitize_feed_limit( $value ) { |
| 349 | $value = (int) $value; |
| 350 | if ( $value < 1 ) { |
| 351 | $value = (int) get_option( 'posts_per_rss', self::FEED_LIMIT_DEFAULT ); |
| 352 | } |
| 353 | |
| 354 | return min( $value < 1 ? self::FEED_LIMIT_DEFAULT : $value, self::feed_limit_max() ); |
| 355 | } |
| 356 | |
| 357 | /** |
| 358 | * Most episodes the podcast feed will carry. |
| 359 | * |
| 360 | * @return int |
| 361 | */ |
| 362 | public static function feed_limit_max(): int { |
| 363 | /** |
| 364 | * Filters the ceiling for the podcast feed's episode limit. Raising it |
| 365 | * renders that many items in one request, so only where the host can |
| 366 | * absorb it. |
| 367 | * |
| 368 | * @since 1.5.0 |
| 369 | * |
| 370 | * @param int $max Maximum episodes a podcast feed may carry. |
| 371 | */ |
| 372 | $max = (int) apply_filters( 'jetpack_podcast_feed_limit_max', self::FEED_LIMIT_MAX ); |
| 373 | |
| 374 | return max( 1, $max ); |
| 375 | } |
| 376 | |
| 377 | /** |
| 378 | * Merge a partial show-URLs patch into the stored value. Empty string for a |
| 379 | * known key removes that entry; URLs failing the per-podcatcher hostname |
| 380 | * allowlist are silently dropped (the SPA validates the same allowlist). |
| 381 | * |
| 382 | * @param mixed $input Incoming patch. |
| 383 | * @return array<string, string> |
| 384 | */ |
| 385 | public static function sanitize_show_urls( $input ) { |
| 386 | $current = array_filter( |
| 387 | array_intersect_key( (array) get_option( 'podcasting_show_urls', array() ), self::SHOW_URL_HOSTS ), |
| 388 | static function ( $value ) { |
| 389 | return is_string( $value ) && '' !== $value; |
| 390 | } |
| 391 | ); |
| 392 | |
| 393 | if ( ! is_array( $input ) ) { |
| 394 | return $current; |
| 395 | } |
| 396 | |
| 397 | foreach ( array_intersect_key( $input, self::SHOW_URL_HOSTS ) as $key => $value ) { |
| 398 | $value = is_string( $value ) ? trim( $value ) : ''; |
| 399 | |
| 400 | if ( '' === $value ) { |
| 401 | unset( $current[ $key ] ); |
| 402 | continue; |
| 403 | } |
| 404 | |
| 405 | $cleaned = self::sanitize_show_url( $key, $value ); |
| 406 | if ( null !== $cleaned ) { |
| 407 | $current[ $key ] = $cleaned; |
| 408 | } |
| 409 | } |
| 410 | |
| 411 | return $current; |
| 412 | } |
| 413 | |
| 414 | /** |
| 415 | * Merge a partial show-states patch into the stored value. Values outside |
| 416 | * the allowed `'pending'`/`'active'` set are dropped; empty string clears a |
| 417 | * stored entry. `'active'` → `'pending'` is |
| 418 | * refused so a stale SPA cache can't downgrade a state that `Feed_Detection` |
| 419 | * promoted via real UA evidence (explicit `''` clears still work). |
| 420 | * |
| 421 | * @param mixed $input Incoming patch. |
| 422 | * @return array<string, string> |
| 423 | */ |
| 424 | public static function sanitize_show_states( $input ) { |
| 425 | $current = array_filter( |
| 426 | array_intersect_key( (array) get_option( 'podcasting_show_states', array() ), self::SHOW_URL_HOSTS ), |
| 427 | static function ( $value ) { |
| 428 | return is_string( $value ) && '' !== $value; |
| 429 | } |
| 430 | ); |
| 431 | |
| 432 | if ( ! is_array( $input ) ) { |
| 433 | return $current; |
| 434 | } |
| 435 | |
| 436 | foreach ( array_intersect_key( $input, self::SHOW_URL_HOSTS ) as $key => $value ) { |
| 437 | $value = is_string( $value ) ? trim( $value ) : ''; |
| 438 | |
| 439 | if ( '' === $value ) { |
| 440 | unset( $current[ $key ] ); |
| 441 | continue; |
| 442 | } |
| 443 | |
| 444 | if ( ! in_array( $value, array( 'pending', 'active' ), true ) ) { |
| 445 | continue; |
| 446 | } |
| 447 | |
| 448 | if ( 'pending' === $value && isset( $current[ $key ] ) && 'active' === $current[ $key ] ) { |
| 449 | continue; |
| 450 | } |
| 451 | |
| 452 | $current[ $key ] = $value; |
| 453 | } |
| 454 | |
| 455 | return $current; |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * Validate a URL against the per-podcatcher hostname allowlist. |
| 460 | * |
| 461 | * @param string $key Podcatcher key. |
| 462 | * @param string $url Candidate URL. |
| 463 | * @return string|null Cleaned URL, or null if the host isn't in the allowlist. |
| 464 | */ |
| 465 | private static function sanitize_show_url( $key, $url ) { |
| 466 | if ( ! isset( self::SHOW_URL_HOSTS[ $key ] ) ) { |
| 467 | return null; |
| 468 | } |
| 469 | |
| 470 | if ( ! is_string( $url ) || strlen( $url ) > self::SHOW_URL_MAX_LENGTH ) { |
| 471 | return null; |
| 472 | } |
| 473 | |
| 474 | $cleaned = esc_url_raw( $url, array( 'https' ) ); |
| 475 | if ( '' === $cleaned ) { |
| 476 | return null; |
| 477 | } |
| 478 | |
| 479 | if ( ! wp_http_validate_url( $cleaned ) ) { |
| 480 | return null; |
| 481 | } |
| 482 | |
| 483 | $host = wp_parse_url( $cleaned, PHP_URL_HOST ); |
| 484 | if ( ! is_string( $host ) || '' === $host ) { |
| 485 | return null; |
| 486 | } |
| 487 | |
| 488 | $host = strtolower( $host ); |
| 489 | if ( 0 === strpos( $host, 'www.' ) ) { |
| 490 | $host = substr( $host, 4 ); |
| 491 | } |
| 492 | |
| 493 | return in_array( $host, self::SHOW_URL_HOSTS[ $key ], true ) ? $cleaned : null; |
| 494 | } |
| 495 | } |