jetpack / _inc / lib / class-jetpack-podcast-helper.php

class-jetpack-podcast-helper.php in Jetpack – WP Security, Backup, Speed, & Growth 16.3-a.7, at _inc/lib/class-jetpack-podcast-helper.php

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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	}
767