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| 1 | <?php |
| 2 | /** |
| 3 | * Helper to massage Podcast data to be used in the Podcast block. |
| 4 | * |
| 5 | * @package automattic/jetpack |
| 6 | */ |
| 7 | |
| 8 | /** |
| 9 | * Class Jetpack_Podcast_Helper |
| 10 | */ |
| 11 | class Jetpack_Podcast_Helper { |
| 12 | /** |
| 13 | * How long to wait before retrying a feed that failed to load. Kept out of step with |
| 14 | * the five minutes WordPress.com caches a feed at the edge, so retries don't keep |
| 15 | * landing on a cold entry. |
| 16 | * |
| 17 | * @var int |
| 18 | */ |
| 19 | const ERROR_CACHE_TIMEOUT = 90; |
| 20 | |
| 21 | /** |
| 22 | * How long to keep the last successful response as a fallback. |
| 23 | * |
| 24 | * @var int |
| 25 | */ |
| 26 | const FALLBACK_CACHE_TIMEOUT = WEEK_IN_SECONDS; |
| 27 | |
| 28 | /** |
| 29 | * Feed errors that describe the feed's contents rather than our failure to reach it. |
| 30 | * |
| 31 | * @var string[] |
| 32 | */ |
| 33 | const AUTHORITATIVE_ERROR_CODES = array( 'no_tracks' ); |
| 34 | |
| 35 | /** |
| 36 | * The RSS feed of the podcast. |
| 37 | * |
| 38 | * @var string |
| 39 | */ |
| 40 | protected $feed = null; |
| 41 | |
| 42 | /** |
| 43 | * The number of seconds to cache the podcast feed data. |
| 44 | * This value defaults to 1 hour specifically for podcast feeds. |
| 45 | * The value can be overridden specifically for podcasts using the |
| 46 | * `jetpack_podcast_feed_cache_timeout` filter. Note that the cache timeout value |
| 47 | * for all RSS feeds can be modified using the `wp_feed_cache_transient_lifetime` |
| 48 | * filter from WordPress core. |
| 49 | * |
| 50 | * @see https://developer.wordpress.org/reference/hooks/wp_feed_cache_transient_lifetime/ |
| 51 | * @see WP_Feed_Cache_Transient |
| 52 | * |
| 53 | * @var int|null |
| 54 | */ |
| 55 | protected $cache_timeout = HOUR_IN_SECONDS; |
| 56 | |
| 57 | /** |
| 58 | * Initialize class. |
| 59 | * |
| 60 | * @param string $feed The RSS feed of the podcast. |
| 61 | */ |
| 62 | public function __construct( $feed ) { |
| 63 | $this->feed = esc_url_raw( $feed ); |
| 64 | |
| 65 | /** |
| 66 | * Filter the number of seconds to cache a specific podcast URL for. The returned value will be ignored if it is null or not a valid integer. |
| 67 | * Note that this timeout will only work if the site is using the default `WP_Feed_Cache_Transient` cache implementation for RSS feeds, |
| 68 | * or their cache implementation relies on the `wp_feed_cache_transient_lifetime` filter. |
| 69 | * |
| 70 | * @since 11.3 |
| 71 | * @see https://developer.wordpress.org/reference/hooks/wp_feed_cache_transient_lifetime/ |
| 72 | * |
| 73 | * @param int|null $cache_timeout The number of seconds to cache the podcast data. Default value is null, so we don't override any defaults from existing filters. |
| 74 | * @param string $podcast_url The URL of the podcast feed. |
| 75 | */ |
| 76 | $podcast_cache_timeout = apply_filters( 'jetpack_podcast_feed_cache_timeout', $this->cache_timeout, $this->feed ); |
| 77 | |
| 78 | // Make sure we force new values for $this->cache_timeout to be integers. |
| 79 | if ( is_numeric( $podcast_cache_timeout ) ) { |
| 80 | $this->cache_timeout = (int) $podcast_cache_timeout; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Retrieves tracks quantity. |
| 86 | * |
| 87 | * @return int number of tracks |
| 88 | */ |
| 89 | public static function get_tracks_quantity() { |
| 90 | /** |
| 91 | * Allow requesting a specific number of tracks from SimplePie's `get_items` call. |
| 92 | * The default number of tracks is ten. |
| 93 | * |
| 94 | * @since 10.4.0 |
| 95 | * |
| 96 | * @param int $number Number of tracks fetched. Default is 10. |
| 97 | */ |
| 98 | return (int) apply_filters( 'jetpack_podcast_helper_tracks_quantity', 10 ); |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Gets podcast data formatted to be used by the Podcast Player block in both server-side |
| 103 | * block rendering and in API `WPCOM_REST_API_V2_Endpoint_Podcast_Player`. |
| 104 | * |
| 105 | * A successful response is cached for one hour, and kept for a week as a fallback to serve |
| 106 | * while the feed is unreachable. Callers that need the feed's true state can opt out of |
| 107 | * both with the `report_errors` argument. |
| 108 | * |
| 109 | * @param array $args { |
| 110 | * Optional array of arguments. |
| 111 | * @type array $guids The IDs of specific episodes to return rather than a list. |
| 112 | * @type bool $episode-options Whether to include the episode list for the selection UI. |
| 113 | * @type bool $report_errors Whether to return feed errors as-is rather than falling |
| 114 | * back to the last successful response. Default false. |
| 115 | * } |
| 116 | * |
| 117 | * @return array|WP_Error The player data or a error object. |
| 118 | */ |
| 119 | public function get_player_data( $args = array() ) { |
| 120 | $guids = isset( $args['guids'] ) && $args['guids'] ? $args['guids'] : array(); |
| 121 | $episode_options = isset( $args['episode-options'] ) && $args['episode-options']; |
| 122 | $report_errors = isset( $args['report_errors'] ) && $args['report_errors']; |
| 123 | |
| 124 | // Try loading data from the cache. |
| 125 | $transient_key = 'jetpack_podcast_' . md5( $this->feed . implode( ',', $guids ) . "-$episode_options" ); |
| 126 | $player_data = get_transient( $transient_key ); |
| 127 | |
| 128 | // A remembered failure would outlive the fix it is asking the author to make. |
| 129 | if ( $report_errors && is_wp_error( $player_data ) ) { |
| 130 | $player_data = false; |
| 131 | } |
| 132 | |
| 133 | // Fetch data if we don't have any cached. |
| 134 | if ( false === $player_data || ( defined( 'WP_DEBUG' ) && WP_DEBUG ) ) { |
| 135 | // Load feed. |
| 136 | $rss = $this->load_feed(); |
| 137 | |
| 138 | if ( is_wp_error( $rss ) ) { |
| 139 | return $this->handle_failure( $transient_key, $rss, $report_errors ); |
| 140 | } |
| 141 | |
| 142 | // Get a list of episodes by guid or all tracks in feed. |
| 143 | if ( count( $guids ) ) { |
| 144 | $tracks = array_map( array( $this, 'get_track_data' ), $guids ); |
| 145 | $tracks = array_filter( |
| 146 | $tracks, |
| 147 | function ( $track ) { |
| 148 | return ! is_wp_error( $track ); |
| 149 | } |
| 150 | ); |
| 151 | } else { |
| 152 | $tracks = $this->get_track_list(); |
| 153 | } |
| 154 | |
| 155 | if ( is_wp_error( $tracks ) ) { |
| 156 | return $this->handle_failure( $transient_key, $tracks, $report_errors ); |
| 157 | } |
| 158 | |
| 159 | if ( empty( $tracks ) ) { |
| 160 | return $this->handle_failure( |
| 161 | $transient_key, |
| 162 | new WP_Error( 'no_tracks', __( 'Your Podcast couldn\'t be embedded as it doesn\'t contain any tracks. Please double check your URL.', 'jetpack' ) ), |
| 163 | $report_errors |
| 164 | ); |
| 165 | } |
| 166 | |
| 167 | // Get podcast meta. |
| 168 | $title = $rss->get_title(); |
| 169 | $title = $this->get_plain_text( $title ); |
| 170 | |
| 171 | $description = $rss->get_description(); |
| 172 | $description = $this->get_plain_text( $description ); |
| 173 | |
| 174 | $cover = $rss->get_image_url(); |
| 175 | $cover = ! empty( $cover ) ? esc_url( $cover ) : null; |
| 176 | |
| 177 | $link = $rss->get_link(); |
| 178 | $link = ! empty( $link ) ? esc_url( $link ) : null; |
| 179 | |
| 180 | $player_data = array( |
| 181 | 'title' => $title, |
| 182 | 'description' => $description, |
| 183 | 'link' => $link, |
| 184 | 'cover' => $cover, |
| 185 | 'tracks' => $tracks, |
| 186 | ); |
| 187 | |
| 188 | if ( $episode_options ) { |
| 189 | $player_data['options'] = array(); |
| 190 | foreach ( $rss->get_items() as $episode ) { |
| 191 | $enclosure = $this->get_audio_enclosure( $episode ); |
| 192 | // If the episode doesn't have playable audio, then don't include it. |
| 193 | if ( is_wp_error( $enclosure ) ) { |
| 194 | continue; |
| 195 | } |
| 196 | $player_data['options'][] = array( |
| 197 | 'label' => $this->get_plain_text( $episode->get_title() ), |
| 198 | 'value' => $episode->get_id(), |
| 199 | ); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | set_transient( $transient_key, $player_data, HOUR_IN_SECONDS ); |
| 204 | |
| 205 | // Callers that asked for errors never read a fallback, so don't pay to write one. |
| 206 | if ( ! $report_errors ) { |
| 207 | $this->store_fallback( $transient_key, $player_data ); |
| 208 | } |
| 209 | |
| 210 | return $player_data; |
| 211 | } |
| 212 | |
| 213 | // Only a remembered failure reaches here; a fresh one returns via handle_failure(). |
| 214 | if ( is_wp_error( $player_data ) ) { |
| 215 | return $this->fallback_for( $transient_key, $player_data ); |
| 216 | } |
| 217 | |
| 218 | // A response cached before this feed had a fallback still deserves to cover the next |
| 219 | // outage, rather than leaving a gap until the cache next turns over. |
| 220 | if ( ! $report_errors ) { |
| 221 | $this->store_fallback( $transient_key, $player_data, true ); |
| 222 | } |
| 223 | |
| 224 | return $player_data; |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * Keeps a successful response around to serve while the feed is unreachable. |
| 229 | * |
| 230 | * @param string $transient_key Cache key for this feed/args combination. |
| 231 | * @param array $player_data The response to keep. |
| 232 | * @param bool $only_if_missing Whether to leave an existing fallback in place. |
| 233 | */ |
| 234 | protected function store_fallback( $transient_key, $player_data, $only_if_missing = false ) { |
| 235 | $fallback_key = static::fallback_key( $transient_key ); |
| 236 | |
| 237 | if ( $only_if_missing && false !== get_transient( $fallback_key ) ) { |
| 238 | return; |
| 239 | } |
| 240 | |
| 241 | set_transient( $fallback_key, $player_data, static::FALLBACK_CACHE_TIMEOUT ); |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Decides what to serve for a failed fetch, and whether to remember the failure. |
| 246 | * |
| 247 | * @param string $transient_key Cache key for this feed/args combination. |
| 248 | * @param WP_Error $error The error to fall back from. |
| 249 | * @param bool $report_errors Whether the caller asked for the error itself. |
| 250 | * @return array|WP_Error The last successful response, or the error. |
| 251 | */ |
| 252 | protected function handle_failure( $transient_key, $error, $report_errors = false ) { |
| 253 | if ( $report_errors ) { |
| 254 | return $error; |
| 255 | } |
| 256 | |
| 257 | $fallback = $this->fallback_for( $transient_key, $error ); |
| 258 | |
| 259 | // Remembering a failure we can't paper over only delays the retry that would earn us |
| 260 | // a fallback. An authoritative one is worth remembering either way. |
| 261 | if ( is_array( $fallback ) || static::is_authoritative( $error ) ) { |
| 262 | // The error, never the fallback: the editor shares this key and would take stale |
| 263 | // episodes as a working feed. |
| 264 | set_transient( $transient_key, $error, static::ERROR_CACHE_TIMEOUT ); |
| 265 | } |
| 266 | |
| 267 | return $fallback; |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * What to serve for a failed fetch: the last successful response, or the error itself. |
| 272 | * |
| 273 | * @param string $transient_key Cache key for this feed/args combination. |
| 274 | * @param WP_Error $error The error to fall back from. |
| 275 | * @return array|WP_Error The last successful response, or the error. |
| 276 | */ |
| 277 | protected function fallback_for( $transient_key, $error ) { |
| 278 | // The feed's own answer, so stale episodes have no business standing in for it. They |
| 279 | // stay stored rather than being deleted: a feed can report itself empty mid-migration, |
| 280 | // and one such read shouldn't cost the week of cover only a success can restore. |
| 281 | if ( static::is_authoritative( $error ) ) { |
| 282 | return $error; |
| 283 | } |
| 284 | |
| 285 | $fallback = get_transient( static::fallback_key( $transient_key ) ); |
| 286 | |
| 287 | return is_array( $fallback ) ? $fallback : $error; |
| 288 | } |
| 289 | |
| 290 | /** |
| 291 | * Whether the error reflects the feed's real contents rather than our failure to |
| 292 | * reach it. |
| 293 | * |
| 294 | * @param WP_Error $error The error to classify. |
| 295 | * @return bool |
| 296 | */ |
| 297 | protected static function is_authoritative( $error ) { |
| 298 | return in_array( $error->get_error_code(), static::AUTHORITATIVE_ERROR_CODES, true ); |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * Cache key holding the last successful response for a feed/args combination. |
| 303 | * |
| 304 | * @param string $transient_key The regular cache key. |
| 305 | * @return string |
| 306 | */ |
| 307 | protected static function fallback_key( $transient_key ) { |
| 308 | return $transient_key . '_last'; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * Gets a specific track from the supplied feed URL. |
| 313 | * |
| 314 | * @param string $guid The GUID of the track. |
| 315 | * @param boolean $force_refresh Clear the feed cache. |
| 316 | * @return array|WP_Error The track object or an error object. |
| 317 | */ |
| 318 | public function get_track_data( $guid, $force_refresh = false ) { |
| 319 | // Get the cache key. |
| 320 | $transient_key = 'jetpack_podcast_' . md5( "$this->feed::$guid" ); |
| 321 | |
| 322 | // Clear the cache if force_refresh param is true. |
| 323 | if ( true === $force_refresh ) { |
| 324 | delete_transient( $transient_key ); |
| 325 | } |
| 326 | |
| 327 | // Try loading track data from the cache. |
| 328 | $track_data = get_transient( $transient_key ); |
| 329 | |
| 330 | // Fetch data if we don't have any cached. |
| 331 | if ( false === $track_data || ( defined( 'WP_DEBUG' ) && WP_DEBUG ) ) { |
| 332 | // Load feed. |
| 333 | $rss = $this->load_feed( $force_refresh ); |
| 334 | |
| 335 | if ( is_wp_error( $rss ) ) { |
| 336 | return $rss; |
| 337 | } |
| 338 | |
| 339 | // Loop over all tracks to find the one. |
| 340 | foreach ( $rss->get_items() as $track ) { |
| 341 | if ( $guid === $track->get_id() ) { |
| 342 | $track_data = $this->setup_tracks_callback( $track ); |
| 343 | break; |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | if ( false === $track_data ) { |
| 348 | return new WP_Error( 'no_track', __( 'The track was not found.', 'jetpack' ) ); |
| 349 | } |
| 350 | |
| 351 | // Cache for 1 hour. |
| 352 | set_transient( $transient_key, $track_data, HOUR_IN_SECONDS ); |
| 353 | } |
| 354 | |
| 355 | return $track_data; |
| 356 | } |
| 357 | |
| 358 | /** |
| 359 | * Gets a list of tracks for the supplied RSS feed. |
| 360 | * |
| 361 | * @return array|WP_Error The feed's tracks or a error object. |
| 362 | */ |
| 363 | public function get_track_list() { |
| 364 | $rss = $this->load_feed(); |
| 365 | |
| 366 | if ( is_wp_error( $rss ) ) { |
| 367 | return $rss; |
| 368 | } |
| 369 | |
| 370 | $tracks_quantity = static::get_tracks_quantity(); |
| 371 | |
| 372 | /** |
| 373 | * Allow requesting a specific number of tracks from SimplePie's `get_items` call. |
| 374 | * The default number of tracks is ten. |
| 375 | * Deprecated. Use jetpack_podcast_helper_tracks_quantity filter instead, which takes one less parameter. |
| 376 | * |
| 377 | * @since 9.5.0 |
| 378 | * @deprecated 10.4.0 |
| 379 | * |
| 380 | * @param int $tracks_quantity Number of tracks fetched. Default is 10. |
| 381 | * @param object $rss The SimplePie object built from core's `fetch_feed` call. |
| 382 | */ |
| 383 | $tracks_quantity = apply_filters_deprecated( 'jetpack_podcast_helper_list_quantity', array( $tracks_quantity, $rss ), '10.4.0', 'jetpack_podcast_helper_tracks_quantity' ); |
| 384 | |
| 385 | // Process the requested number of items from our feed. |
| 386 | $track_list = array_map( array( __CLASS__, 'setup_tracks_callback' ), $rss->get_items( 0, $tracks_quantity ) ); |
| 387 | |
| 388 | // Filter out any tracks that are empty. |
| 389 | // Reset the array indices. |
| 390 | return array_values( array_filter( $track_list ) ); |
| 391 | } |
| 392 | |
| 393 | /** |
| 394 | * Formats string as pure plaintext, with no HTML tags or entities present. |
| 395 | * This is ready to be used in React, innerText but needs to be escaped |
| 396 | * using standard `esc_html` when generating markup on server. |
| 397 | * |
| 398 | * @param string $str Input string. |
| 399 | * @return string Plain text string. |
| 400 | */ |
| 401 | protected function get_plain_text( $str ) { |
| 402 | return $this->sanitize_and_decode_text( $str, true ); |
| 403 | } |
| 404 | |
| 405 | /** |
| 406 | * Formats strings as safe HTML. |
| 407 | * |
| 408 | * @param string $str Input string. |
| 409 | * @return string HTML text string safe for post_content. |
| 410 | */ |
| 411 | protected function get_html_text( $str ) { |
| 412 | return $this->sanitize_and_decode_text( $str, false ); |
| 413 | } |
| 414 | |
| 415 | /** |
| 416 | * Strip unallowed html tags and decode entities. |
| 417 | * |
| 418 | * @param string $str Input string. |
| 419 | * @param boolean $strip_all_tags Strip all tags, otherwise allow post_content safe tags. |
| 420 | * @return string Sanitized and decoded text. |
| 421 | */ |
| 422 | protected function sanitize_and_decode_text( $str, $strip_all_tags = true ) { |
| 423 | // Trim string and return if empty. |
| 424 | $str = trim( (string) $str ); |
| 425 | if ( empty( $str ) ) { |
| 426 | return ''; |
| 427 | } |
| 428 | |
| 429 | if ( $strip_all_tags ) { |
| 430 | // Make sure there are no tags. |
| 431 | $str = wp_strip_all_tags( $str ); |
| 432 | } else { |
| 433 | $str = wp_kses_post( $str ); |
| 434 | } |
| 435 | |
| 436 | // Replace all entities with their characters, including all types of quotes. |
| 437 | $str = html_entity_decode( $str, ENT_QUOTES ); |
| 438 | |
| 439 | return $str; |
| 440 | } |
| 441 | |
| 442 | /** |
| 443 | * Loads an RSS feed using `fetch_feed`. |
| 444 | * |
| 445 | * @param boolean $force_refresh Clear the feed cache. |
| 446 | * @return SimplePie\SimplePie|WP_Error The RSS object or error. |
| 447 | */ |
| 448 | public function load_feed( $force_refresh = false ) { |
| 449 | // Add action: clear the SimplePie Cache if $force_refresh param is true. |
| 450 | if ( true === $force_refresh ) { |
| 451 | add_action( 'wp_feed_options', array( __CLASS__, 'reset_simplepie_cache' ) ); |
| 452 | } |
| 453 | // Add action: detect the podcast feed from the provided feed URL. |
| 454 | add_action( 'wp_feed_options', array( __CLASS__, 'set_podcast_locator' ) ); |
| 455 | |
| 456 | $cache_timeout_filter_added = false; |
| 457 | if ( $this->cache_timeout !== null ) { |
| 458 | // If we have a custom cache timeout, apply the custom timeout value. |
| 459 | add_filter( 'wp_feed_cache_transient_lifetime', array( $this, 'filter_podcast_cache_timeout' ), 20 ); |
| 460 | $cache_timeout_filter_added = true; |
| 461 | } |
| 462 | |
| 463 | /** |
| 464 | * Allow callers to set up any desired hooks when we fetch the content for a podcast. |
| 465 | * The `jetpack_podcast_post_fetch` action can be used to perform cleanup. |
| 466 | * |
| 467 | * @param string $podcast_url URL for the podcast's RSS feed. |
| 468 | * |
| 469 | * @since 11.2 |
| 470 | */ |
| 471 | do_action( 'jetpack_podcast_pre_fetch', $this->feed ); |
| 472 | |
| 473 | // Fetch the feed. |
| 474 | $rss = fetch_feed( $this->feed ); |
| 475 | |
| 476 | // Remove added actions from wp_feed_options hook. |
| 477 | remove_action( 'wp_feed_options', array( __CLASS__, 'set_podcast_locator' ) ); |
| 478 | if ( true === $force_refresh ) { |
| 479 | remove_action( 'wp_feed_options', array( __CLASS__, 'reset_simplepie_cache' ) ); |
| 480 | } |
| 481 | |
| 482 | if ( $cache_timeout_filter_added ) { |
| 483 | // Remove the cache timeout filter we added. |
| 484 | remove_filter( 'wp_feed_cache_transient_lifetime', array( $this, 'filter_podcast_cache_timeout' ), 20 ); |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * Allow callers to identify when we have completed fetching a specified podcast feed. |
| 489 | * This makes it possible to clean up any actions or filters that were set up using the |
| 490 | * `jetpack_podcast_pre_fetch` action. |
| 491 | * |
| 492 | * Note that this action runs after other hooks added by Jetpack have been removed. |
| 493 | * |
| 494 | * @param string $podcast_url URL for the podcast's RSS feed. |
| 495 | * @param SimplePie\SimplePie|SimplePie|WP_Error $rss Either the SimplePie RSS object or an error. |
| 496 | * |
| 497 | * @since 11.2 |
| 498 | */ |
| 499 | do_action( 'jetpack_podcast_post_fetch', $this->feed, $rss ); |
| 500 | |
| 501 | if ( is_wp_error( $rss ) ) { |
| 502 | return new WP_Error( 'invalid_url', __( 'Your podcast couldn\'t be embedded. Please double check your URL.', 'jetpack' ) ); |
| 503 | } |
| 504 | |
| 505 | if ( ! $rss->get_item_quantity() ) { |
| 506 | return new WP_Error( 'no_tracks', __( 'Podcast audio RSS feed has no tracks.', 'jetpack' ) ); |
| 507 | } |
| 508 | |
| 509 | return $rss; |
| 510 | } |
| 511 | |
| 512 | /** |
| 513 | * Filter to override the default number of seconds to cache RSS feed data for the current feed. |
| 514 | * Note that we don't use the feed's URL because some of the SimplePie feed caches trigger this |
| 515 | * filter with a feed identifier and not a URL. |
| 516 | * |
| 517 | * @param int $cache_timeout_in_seconds Number of seconds to cache the podcast feed. |
| 518 | * |
| 519 | * @return int The number of seconds to cache the podcast feed. |
| 520 | */ |
| 521 | public function filter_podcast_cache_timeout( $cache_timeout_in_seconds ) { |
| 522 | if ( $this->cache_timeout !== null ) { |
| 523 | return $this->cache_timeout; |
| 524 | } |
| 525 | |
| 526 | return $cache_timeout_in_seconds; |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * Action handler to set our podcast specific feed locator class on the SimplePie object. |
| 531 | * |
| 532 | * @param SimplePie\SimplePie $feed The SimplePie object, passed by reference. |
| 533 | */ |
| 534 | public static function set_podcast_locator( &$feed ) { |
| 535 | if ( ! class_exists( 'Jetpack_Podcast_Feed_Locator' ) ) { |
| 536 | require_once JETPACK__PLUGIN_DIR . '/_inc/lib/class-jetpack-podcast-feed-locator.php'; |
| 537 | } |
| 538 | |
| 539 | $feed->get_registry()->register( SimplePie\Locator::class, 'Jetpack_Podcast_Feed_Locator' ); |
| 540 | } |
| 541 | |
| 542 | /** |
| 543 | * Action handler to reset the SimplePie cache for the podcast feed. |
| 544 | * |
| 545 | * Note this only resets the cache for the specified url. If the feed locator finds the podcast feed |
| 546 | * within the markup of the that url, that feed itself may still be cached. |
| 547 | * |
| 548 | * @param SimplePie\SimplePie $feed The SimplePie object, passed by reference. |
| 549 | * @return void |
| 550 | */ |
| 551 | public static function reset_simplepie_cache( &$feed ) { |
| 552 | // Retrieve the cache object for a feed url. Based on: |
| 553 | // https://github.com/WordPress/WordPress/blob/fd1c2cb4011845ceb7244a062b09b2506082b1c9/wp-includes/class-simplepie.php#L1412. |
| 554 | // @todo This method of getting the cache is deprecated, and there doesn't seem to be a real replacement. `$feed->get_cache()` is private. |
| 555 | // @phan-suppress-next-line PhanUndeclaredClassReference |
| 556 | $cache = $feed->registry->call( 'Cache', 'get_handler', array( $feed->cache_location, call_user_func( $feed->cache_name_function, $feed->feed_url ), 'spc' ) ); |
| 557 | |
| 558 | if ( method_exists( $cache, 'unlink' ) ) { |
| 559 | $cache->unlink(); |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | /** |
| 564 | * Prepares Episode data to be used by the Podcast Player block. |
| 565 | * |
| 566 | * @param SimplePie\Item $episode SimplePie Item object, representing a podcast episode. |
| 567 | * @return array |
| 568 | */ |
| 569 | protected function setup_tracks_callback( SimplePie\Item $episode ) { |
| 570 | $enclosure = $this->get_audio_enclosure( $episode ); |
| 571 | |
| 572 | // If the audio enclosure is empty then it is not playable. |
| 573 | // We therefore return an empty array for this track. |
| 574 | // It will be filtered out later. |
| 575 | if ( is_wp_error( $enclosure ) ) { |
| 576 | return array(); |
| 577 | } |
| 578 | |
| 579 | // If there is no link return an empty array. We will filter out later. |
| 580 | if ( empty( $enclosure->link ) ) { |
| 581 | return array(); |
| 582 | } |
| 583 | |
| 584 | $publish_date = $episode->get_gmdate( DATE_ATOM ); |
| 585 | // Build track data. |
| 586 | $track = array( |
| 587 | 'id' => wp_unique_id( 'podcast-track-' ), |
| 588 | 'link' => esc_url( $episode->get_link() ), |
| 589 | 'src' => esc_url( (string) $enclosure->link ), |
| 590 | 'type' => esc_attr( (string) $enclosure->type ), |
| 591 | 'description' => $this->get_plain_text( $episode->get_description() ), |
| 592 | 'description_html' => $this->get_html_text( $episode->get_description() ), |
| 593 | 'title' => $this->get_plain_text( $episode->get_title() ), |
| 594 | 'image' => esc_url( $this->get_episode_image_url( $episode ) ), |
| 595 | 'guid' => $this->get_plain_text( $episode->get_id() ), |
| 596 | 'publish_date' => $publish_date ? $publish_date : null, |
| 597 | ); |
| 598 | |
| 599 | if ( empty( $track['title'] ) ) { |
| 600 | $track['title'] = esc_html__( '(no title)', 'jetpack' ); |
| 601 | } |
| 602 | |
| 603 | if ( ! empty( $enclosure->duration ) ) { |
| 604 | $track['duration'] = esc_html( $this->format_track_duration( (int) $enclosure->duration ) ); |
| 605 | } |
| 606 | |
| 607 | return $track; |
| 608 | } |
| 609 | |
| 610 | /** |
| 611 | * Retrieves an episode's image URL, if it's available. |
| 612 | * |
| 613 | * @param SimplePie\Item $episode SimplePie Item object, representing a podcast episode. |
| 614 | * @param string $itunes_ns The itunes namespace, defaulted to the standard 1.0 version. |
| 615 | * @return string|null The image URL or null if not found. |
| 616 | */ |
| 617 | protected function get_episode_image_url( SimplePie\Item $episode, $itunes_ns = 'http://www.itunes.com/dtds/podcast-1.0.dtd' ) { |
| 618 | $image = $episode->get_item_tags( $itunes_ns, 'image' ); |
| 619 | if ( isset( $image[0]['attribs']['']['href'] ) ) { |
| 620 | return $image[0]['attribs']['']['href']; |
| 621 | } |
| 622 | return null; |
| 623 | } |
| 624 | |
| 625 | /** |
| 626 | * Retrieves an audio enclosure. |
| 627 | * |
| 628 | * @param SimplePie\Item $episode SimplePie Item object, representing a podcast episode. |
| 629 | * @return SimplePie\Enclosure|null |
| 630 | */ |
| 631 | protected function get_audio_enclosure( SimplePie\Item $episode ) { |
| 632 | foreach ( (array) $episode->get_enclosures() as $enclosure ) { |
| 633 | if ( str_starts_with( $enclosure->type ?? '', 'audio/' ) ) { |
| 634 | return $enclosure; |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | return new WP_Error( 'invalid_audio', __( 'Podcast audio is an invalid type.', 'jetpack' ) ); |
| 639 | } |
| 640 | |
| 641 | /** |
| 642 | * Returns the track duration as a formatted string. |
| 643 | * |
| 644 | * @param int|float $duration of the track in seconds. |
| 645 | * @return string |
| 646 | */ |
| 647 | protected function format_track_duration( $duration ) { |
| 648 | $format = $duration > HOUR_IN_SECONDS ? 'H:i:s' : 'i:s'; |
| 649 | |
| 650 | return date_i18n( $format, $duration ); |
| 651 | } |
| 652 | |
| 653 | /** |
| 654 | * Gets podcast player data schema. |
| 655 | * |
| 656 | * Useful for json schema in REST API endpoints. |
| 657 | * |
| 658 | * @return array Player data json schema. |
| 659 | */ |
| 660 | public static function get_player_data_schema() { |
| 661 | return array( |
| 662 | '$schema' => 'http://json-schema.org/draft-04/schema#', |
| 663 | 'title' => 'jetpack-podcast-player-data', |
| 664 | 'type' => 'object', |
| 665 | 'properties' => array( |
| 666 | 'title' => array( |
| 667 | 'description' => __( 'The title of the podcast.', 'jetpack' ), |
| 668 | 'type' => 'string', |
| 669 | ), |
| 670 | 'link' => array( |
| 671 | 'description' => __( 'The URL of the podcast website.', 'jetpack' ), |
| 672 | 'type' => 'string', |
| 673 | 'format' => 'uri', |
| 674 | ), |
| 675 | 'cover' => array( |
| 676 | 'description' => __( 'The URL of the podcast cover image.', 'jetpack' ), |
| 677 | 'type' => 'string', |
| 678 | 'format' => 'uri', |
| 679 | ), |
| 680 | 'tracks' => self::get_tracks_schema(), |
| 681 | 'options' => self::get_options_schema(), |
| 682 | ), |
| 683 | ); |
| 684 | } |
| 685 | |
| 686 | /** |
| 687 | * Gets tracks data schema. |
| 688 | * |
| 689 | * Useful for json schema in REST API endpoints. |
| 690 | * |
| 691 | * @return array Tracks json schema. |
| 692 | */ |
| 693 | public static function get_tracks_schema() { |
| 694 | return array( |
| 695 | 'description' => __( 'Latest episodes of the podcast.', 'jetpack' ), |
| 696 | 'type' => 'array', |
| 697 | 'items' => array( |
| 698 | 'type' => 'object', |
| 699 | 'properties' => array( |
| 700 | 'id' => array( |
| 701 | 'description' => __( 'The episode id. Generated per request, not globally unique.', 'jetpack' ), |
| 702 | 'type' => 'string', |
| 703 | ), |
| 704 | 'link' => array( |
| 705 | 'description' => __( 'The external link for the episode.', 'jetpack' ), |
| 706 | 'type' => 'string', |
| 707 | 'format' => 'uri', |
| 708 | ), |
| 709 | 'src' => array( |
| 710 | 'description' => __( 'The audio file URL of the episode.', 'jetpack' ), |
| 711 | 'type' => 'string', |
| 712 | 'format' => 'uri', |
| 713 | ), |
| 714 | 'type' => array( |
| 715 | 'description' => __( 'The mime type of the episode.', 'jetpack' ), |
| 716 | 'type' => 'string', |
| 717 | ), |
| 718 | 'description' => array( |
| 719 | 'description' => __( 'The episode description, in plaintext.', 'jetpack' ), |
| 720 | 'type' => 'string', |
| 721 | ), |
| 722 | 'description_html' => array( |
| 723 | 'description' => __( 'The episode description with allowed html tags.', 'jetpack' ), |
| 724 | 'type' => 'string', |
| 725 | ), |
| 726 | 'title' => array( |
| 727 | 'description' => __( 'The episode title.', 'jetpack' ), |
| 728 | 'type' => 'string', |
| 729 | ), |
| 730 | 'publish_date' => array( |
| 731 | 'description' => __( 'The UTC publish date and time of the episode', 'jetpack' ), |
| 732 | 'type' => 'string', |
| 733 | 'format' => 'date-time', |
| 734 | ), |
| 735 | ), |
| 736 | ), |
| 737 | ); |
| 738 | } |
| 739 | |
| 740 | /** |
| 741 | * Gets the episode options schema. |
| 742 | * |
| 743 | * Useful for json schema in REST API endpoints. |
| 744 | * |
| 745 | * @return array Tracks json schema. |
| 746 | */ |
| 747 | public static function get_options_schema() { |
| 748 | return array( |
| 749 | 'description' => __( 'The options that will be displayed in the episode selection UI', 'jetpack' ), |
| 750 | 'type' => 'array', |
| 751 | 'items' => array( |
| 752 | 'type' => 'object', |
| 753 | 'properties' => array( |
| 754 | 'label' => array( |
| 755 | 'description' => __( 'The display label of the option, the episode title.', 'jetpack' ), |
| 756 | 'type' => 'string', |
| 757 | ), |
| 758 | 'value' => array( |
| 759 | 'description' => __( 'The value used for that option, the episode GUID', 'jetpack' ), |
| 760 | 'type' => 'string', |
| 761 | ), |
| 762 | ), |
| 763 | ), |
| 764 | ); |
| 765 | } |
| 766 | } |