class.photon.php — Jetpack – WP Security, Backup, Speed, & Growth 8.7.0.1

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class.photon.php

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1	<?php
2
3	use Automattic\Jetpack\Assets;
4
5	class Jetpack_Photon {
6	/**
7	* Class variables
8	*/
9	// Oh look, a singleton
10	private static $__instance = null;
11
12	// Allowed extensions must match https://code.trac.wordpress.org/browser/photon/index.php#L31
13	protected static $extensions = array(
14	'gif',
15	'jpg',
16	'jpeg',
17	'png',
18	);
19
20	// Don't access this directly. Instead, use self::image_sizes() so it's actually populated with something.
21	protected static $image_sizes = null;
22
23	/**
24	* Singleton implementation
25	*
26	* @return object
27	*/
28	public static function instance() {
29	if ( ! is_a( self::$__instance, 'Jetpack_Photon' ) ) {
30	self::$__instance = new Jetpack_Photon();
31	self::$__instance->setup();
32	}
33
34	return self::$__instance;
35	}
36
37	/**
38	* Silence is golden.
39	*/
40	private function __construct() {}
41
42	/**
43	* Register actions and filters, but only if basic Photon functions are available.
44	* The basic functions are found in ./functions.photon.php.
45	*
46	* @uses add_action, add_filter
47	* @return null
48	*/
49	private function setup() {
50	if ( ! function_exists( 'jetpack_photon_url' ) ) {
51	return;
52	}
53
54	// Images in post content and galleries
55	add_filter( 'the_content', array( __CLASS__, 'filter_the_content' ), 999999 );
56	add_filter( 'get_post_galleries', array( __CLASS__, 'filter_the_galleries' ), 999999 );
57	add_filter( 'widget_media_image_instance', array( __CLASS__, 'filter_the_image_widget' ), 999999 );
58
59	// Core image retrieval
60	add_filter( 'image_downsize', array( $this, 'filter_image_downsize' ), 10, 3 );
61	add_filter( 'rest_request_before_callbacks', array( $this, 'should_rest_photon_image_downsize' ), 10, 3 );
62	add_action( 'rest_after_insert_attachment', array( $this, 'should_rest_photon_image_downsize_insert_attachment' ), 10, 2 );
63	add_filter( 'rest_request_after_callbacks', array( $this, 'cleanup_rest_photon_image_downsize' ) );
64
65	// Responsive image srcset substitution
66	add_filter( 'wp_calculate_image_srcset', array( $this, 'filter_srcset_array' ), 10, 5 );
67	add_filter( 'wp_calculate_image_sizes', array( $this, 'filter_sizes' ), 1, 2 ); // Early so themes can still easily filter.
68
69	// Helpers for maniuplated images
70	add_action( 'wp_enqueue_scripts', array( $this, 'action_wp_enqueue_scripts' ), 9 );
71
72	/**
73	* Allow Photon to disable uploaded images resizing and use its own resize capabilities instead.
74	*
75	* @module photon
76	*
77	* @since 7.1.0
78	*
79	* @param bool false Should Photon enable noresize mode. Default to false.
80	*/
81	if ( apply_filters( 'jetpack_photon_noresize_mode', false ) ) {
82	$this->enable_noresize_mode();
83	}
84	}
85
86	/**
87	* Enables the noresize mode for Photon, allowing to avoid intermediate size files generation.
88	*/
89	private function enable_noresize_mode() {
90	jetpack_require_lib( 'class.jetpack-photon-image-sizes' );
91
92	// The main objective of noresize mode is to disable additional resized image versions creation.
93	// This filter handles removal of additional sizes.
94	add_filter( 'intermediate_image_sizes_advanced', array( __CLASS__, 'filter_photon_noresize_intermediate_sizes' ) );
95
96	// Load the noresize srcset solution on priority of 20, allowing other plugins to set sizes earlier.
97	add_filter( 'wp_get_attachment_metadata', array( __CLASS__, 'filter_photon_norezise_maybe_inject_sizes' ), 20, 2 );
98
99	// Photonize thumbnail URLs in the API response.
100	add_filter( 'rest_api_thumbnail_size_urls', array( __CLASS__, 'filter_photon_noresize_thumbnail_urls' ) );
101
102	// This allows to assign the Photon domain to images that normally use the home URL as base.
103	add_filter( 'jetpack_photon_domain', array( __CLASS__, 'filter_photon_norezise_domain' ), 10, 2 );
104
105	add_filter( 'the_content', array( __CLASS__, 'filter_content_add' ), 0 );
106
107	// Jetpack hooks in at six nines (999999) so this filter does at seven.
108	add_filter( 'the_content', array( __CLASS__, 'filter_content_remove' ), 9999999 );
109
110	// Regular Photon operation mode filter doesn't run when is_admin(), so we need an additional filter.
111	// This is temporary until Jetpack allows more easily running these filters for is_admin().
112	if ( is_admin() ) {
113	add_filter( 'image_downsize', array( $this, 'filter_image_downsize' ), 5, 3 );
114
115	// Allows any image that gets passed to Photon to be resized via Photon.
116	add_filter( 'jetpack_photon_admin_allow_image_downsize', '__return_true' );
117	}
118	}
119
120	/**
121	* This is our catch-all to strip dimensions from intermediate images in content.
122	* Since this primarily only impacts post_content we do a little dance to add the filter early
123	* to `the_content` and then remove it later on in the same hook.
124	*
125	* @param String $content the post content.
126	* @return String the post content unchanged.
127	*/
128	public static function filter_content_add( $content ) {
129	add_filter( 'jetpack_photon_pre_image_url', array( __CLASS__, 'strip_image_dimensions_maybe' ) );
130	return $content;
131	}
132
133	/**
134	* Removing the content filter that was set previously.
135	*
136	* @param String $content the post content.
137	* @return String the post content unchanged.
138	*/
139	public static function filter_content_remove( $content ) {
140	remove_filter( 'jetpack_photon_pre_image_url', array( __CLASS__, 'strip_image_dimensions_maybe' ) );
141	return $content;
142	}
143
144	/**
145	* Short circuits the Photon filter to enable Photon processing for any URL.
146	*
147	* @param String $photon_url a proposed Photon URL for the media file.
148	* @param String $image_url the original media URL.
149	* @return String an URL to be used for the media file.
150	*/
151	public static function filter_photon_norezise_domain( $photon_url, $image_url ) {
152	return $photon_url;
153	}
154
155	/**
156	* Disables intermediate sizes to disallow resizing.
157	*
158	* @param array $sizes an array containing image sizes.
159	* @return Boolean
160	*/
161	public static function filter_photon_noresize_intermediate_sizes( $sizes ) {
162	return array();
163	}
164
165	public static function filter_photon_noresize_thumbnail_urls( $sizes ) {
166	foreach ( $sizes as $size => $url ) {
167	$parts = explode( '?', $url );
168	$arguments = isset( $parts[1] ) ? $parts[1] : array();
169
170	$sizes[ $size ] = jetpack_photon_url( $url, wp_parse_args( $arguments ) );
171	}
172
173	return $sizes;
174	}
175
176	/**
177	* Inject image sizes to attachment metadata.
178	*
179	* @param array $data Attachment metadata.
180	* @param int $attachment_id Attachment's post ID.
181	*
182	* @return array Attachment metadata.
183	*/
184	public static function filter_photon_norezise_maybe_inject_sizes( $data, $attachment_id ) {
185	// Can't do much if data is empty.
186	if ( empty( $data ) ) {
187	return $data;
188	}
189	$sizes_already_exist = (
190	true === is_array( $data )
191	&& true === array_key_exists( 'sizes', $data )
192	&& true === is_array( $data['sizes'] )
193	&& false === empty( $data['sizes'] )
194	);
195	if ( $sizes_already_exist ) {
196	return $data;
197	}
198	// Missing some critical data we need to determine sizes, not processing.
199	if ( ! isset( $data['file'] )
200	\|\| ! isset( $data['width'] )
201	\|\| ! isset( $data['height'] )
202	) {
203	return $data;
204	}
205
206	$mime_type = get_post_mime_type( $attachment_id );
207	$attachment_is_image = preg_match( '!^image/!', $mime_type );
208
209	if ( 1 === $attachment_is_image ) {
210	$image_sizes = new Jetpack_Photon_ImageSizes( $attachment_id, $data );
211	$data['sizes'] = $image_sizes->generate_sizes_meta();
212	}
213	return $data;
214	}
215
216	/**
217	* Inject image sizes to Jetpack REST API responses. This wraps the filter_photon_norezise_maybe_inject_sizes function.
218	*
219	* @param array $data Attachment sizes data.
220	* @param int $attachment_id Attachment's post ID.
221	*
222	* @return array Attachment sizes array.
223	*/
224	public static function filter_photon_norezise_maybe_inject_sizes_api( $sizes, $attachment_id ) {
225	return self::filter_photon_norezise_maybe_inject_sizes( wp_get_attachment_metadata( $attachment_id ), $attachment_id );
226	}
227
228	/**
229	* * IN-CONTENT IMAGE MANIPULATION FUNCTIONS
230	**/
231
232	/**
233	* Match all images and any relevant <a> tags in a block of HTML.
234	*
235	* @param string $content Some HTML.
236	* @return array An array of $images matches, where $images[0] is
237	* an array of full matches, and the link_url, img_tag,
238	* and img_url keys are arrays of those matches.
239	*/
240	public static function parse_images_from_html( $content ) {
241	$images = array();
242
243	if ( preg_match_all( '#(?:<a[^>]+?href=["\|\'](?P<link_url>[^\s]+?)["\|\'][^>]?>\s)?(?P<img_tag><(?:img\|amp-img\|amp-anim)[^>]?\s+?src=["\|\'](?P<img_url>[^\s]+?)["\|\'].?>){1}(?:\s*</a>)?#is', $content, $images ) ) {
244	foreach ( $images as $key => $unused ) {
245	// Simplify the output as much as possible, mostly for confirming test results.
246	if ( is_numeric( $key ) && $key > 0 ) {
247	unset( $images[ $key ] );
248	}
249	}
250
251	return $images;
252	}
253
254	return array();
255	}
256
257	/**
258	* Try to determine height and width from strings WP appends to resized image filenames.
259	*
260	* @param string $src The image URL.
261	* @return array An array consisting of width and height.
262	*/
263	public static function parse_dimensions_from_filename( $src ) {
264	$width_height_string = array();
265
266	if ( preg_match( '#-(\d+)x(\d+)\.(?:' . implode( '\|', self::$extensions ) . '){1}$#i', $src, $width_height_string ) ) {
267	$width = (int) $width_height_string[1];
268	$height = (int) $width_height_string[2];
269
270	if ( $width && $height ) {
271	return array( $width, $height );
272	}
273	}
274
275	return array( false, false );
276	}
277
278	/**
279	* Identify images in post content, and if images are local (uploaded to the current site), pass through Photon.
280	*
281	* @param string $content
282	* @uses self::validate_image_url, apply_filters, jetpack_photon_url, esc_url
283	* @filter the_content
284	* @return string
285	*/
286	public static function filter_the_content( $content ) {
287	$images = self::parse_images_from_html( $content );
288
289	if ( ! empty( $images ) ) {
290	$content_width = Jetpack::get_content_width();
291
292	$image_sizes = self::image_sizes();
293
294	$upload_dir = wp_get_upload_dir();
295
296	foreach ( $images[0] as $index => $tag ) {
297	// Default to resize, though fit may be used in certain cases where a dimension cannot be ascertained
298	$transform = 'resize';
299
300	// Start with a clean attachment ID each time
301	$attachment_id = false;
302
303	// Flag if we need to munge a fullsize URL
304	$fullsize_url = false;
305
306	// Identify image source
307	$src = $src_orig = $images['img_url'][ $index ];
308
309	/**
310	* Allow specific images to be skipped by Photon.
311	*
312	* @module photon
313	*
314	* @since 2.0.3
315	*
316	* @param bool false Should Photon ignore this image. Default to false.
317	* @param string $src Image URL.
318	* @param string $tag Image Tag (Image HTML output).
319	*/
320	if ( apply_filters( 'jetpack_photon_skip_image', false, $src, $tag ) ) {
321	continue;
322	}
323
324	// Support Automattic's Lazy Load plugin
325	// Can't modify $tag yet as we need unadulterated version later
326	if ( preg_match( '#data-lazy-src=["\|\'](.+?)["\|\']#i', $images['img_tag'][ $index ], $lazy_load_src ) ) {
327	$placeholder_src = $placeholder_src_orig = $src;
328	$src = $src_orig = $lazy_load_src[1];
329	} elseif ( preg_match( '#data-lazy-original=["\|\'](.+?)["\|\']#i', $images['img_tag'][ $index ], $lazy_load_src ) ) {
330	$placeholder_src = $placeholder_src_orig = $src;
331	$src = $src_orig = $lazy_load_src[1];
332	}
333
334	// Check if image URL should be used with Photon
335	if ( self::validate_image_url( $src ) ) {
336	// Find the width and height attributes
337	$width = $height = false;
338
339	// First, check the image tag
340	if ( preg_match( '#[\s\|"\|\']width=["\|\']?([\d%]+)["\|\']?#i', $images['img_tag'][ $index ], $width_string ) ) {
341	$width = $width_string[1];
342	}
343
344	if ( preg_match( '#[\s\|"\|\']height=["\|\']?([\d%]+)["\|\']?#i', $images['img_tag'][ $index ], $height_string ) ) {
345	$height = $height_string[1];
346	}
347
348	// Can't pass both a relative width and height, so unset the height in favor of not breaking the horizontal layout.
349	if ( false !== strpos( $width, '%' ) && false !== strpos( $height, '%' ) ) {
350	$width = $height = false;
351	}
352
353	// Detect WP registered image size from HTML class
354	if ( preg_match( '#class=["\|\']?[^"\']size-([^"\'\s]+)[^"\']["\|\']?#i', $images['img_tag'][ $index ], $size ) ) {
355	$size = array_pop( $size );
356
357	if ( false === $width && false === $height && 'full' != $size && array_key_exists( $size, $image_sizes ) ) {
358	$width = (int) $image_sizes[ $size ]['width'];
359	$height = (int) $image_sizes[ $size ]['height'];
360	$transform = $image_sizes[ $size ]['crop'] ? 'resize' : 'fit';
361	}
362	} else {
363	unset( $size );
364	}
365
366	// WP Attachment ID, if uploaded to this site
367	if (
368	preg_match( '#class=["\|\']?[^"\']wp-image-([\d]+)[^"\']["\|\']?#i', $images['img_tag'][ $index ], $attachment_id ) &&
369	0 === strpos( $src, $upload_dir['baseurl'] ) &&
370	/**
371	* Filter whether an image using an attachment ID in its class has to be uploaded to the local site to go through Photon.
372	*
373	* @module photon
374	*
375	* @since 2.0.3
376	*
377	* @param bool false Was the image uploaded to the local site. Default to false.
378	* @param array $args {
379	* Array of image details.
380	*
381	* @type $src Image URL.
382	* @type tag Image tag (Image HTML output).
383	* @type $images Array of information about the image.
384	* @type $index Image index.
385	* }
386	*/
387	apply_filters( 'jetpack_photon_image_is_local', false, compact( 'src', 'tag', 'images', 'index' ) )
388	) {
389	$attachment_id = intval( array_pop( $attachment_id ) );
390
391	if ( $attachment_id ) {
392	$attachment = get_post( $attachment_id );
393
394	// Basic check on returned post object
395	if ( is_object( $attachment ) && ! is_wp_error( $attachment ) && 'attachment' == $attachment->post_type ) {
396	$src_per_wp = wp_get_attachment_image_src( $attachment_id, isset( $size ) ? $size : 'full' );
397
398	if ( self::validate_image_url( $src_per_wp[0] ) ) {
399	$src = $src_per_wp[0];
400	$fullsize_url = true;
401
402	// Prevent image distortion if a detected dimension exceeds the image's natural dimensions
403	if ( ( false !== $width && $width > $src_per_wp[1] ) \|\| ( false !== $height && $height > $src_per_wp[2] ) ) {
404	$width = false === $width ? false : min( $width, $src_per_wp[1] );
405	$height = false === $height ? false : min( $height, $src_per_wp[2] );
406	}
407
408	// If no width and height are found, max out at source image's natural dimensions
409	// Otherwise, respect registered image sizes' cropping setting
410	if ( false === $width && false === $height ) {
411	$width = $src_per_wp[1];
412	$height = $src_per_wp[2];
413	$transform = 'fit';
414	} elseif ( isset( $size ) && array_key_exists( $size, $image_sizes ) && isset( $image_sizes[ $size ]['crop'] ) ) {
415	$transform = (bool) $image_sizes[ $size ]['crop'] ? 'resize' : 'fit';
416	}
417	}
418	} else {
419	unset( $attachment_id );
420	unset( $attachment );
421	}
422	}
423	}
424
425	// If image tag lacks width and height arguments, try to determine from strings WP appends to resized image filenames.
426	if ( false === $width && false === $height ) {
427	list( $width, $height ) = self::parse_dimensions_from_filename( $src );
428	}
429
430	$width_orig = $width;
431	$height_orig = $height;
432	$transform_orig = $transform;
433
434	// If width is available, constrain to $content_width
435	if ( false !== $width && false === strpos( $width, '%' ) && is_numeric( $content_width ) ) {
436	if ( $width > $content_width && false !== $height && false === strpos( $height, '%' ) ) {
437	$height = round( ( $content_width * $height ) / $width );
438	$width = $content_width;
439	} elseif ( $width > $content_width ) {
440	$width = $content_width;
441	}
442	}
443
444	// Set a width if none is found and $content_width is available
445	// If width is set in this manner and height is available, use `fit` instead of `resize` to prevent skewing
446	if ( false === $width && is_numeric( $content_width ) ) {
447	$width = (int) $content_width;
448
449	if ( false !== $height ) {
450	$transform = 'fit';
451	}
452	}
453
454	// Detect if image source is for a custom-cropped thumbnail and prevent further URL manipulation.
455	if ( ! $fullsize_url && preg_match_all( '#-e[a-z0-9]+(-\d+x\d+)?\.(' . implode( '\|', self::$extensions ) . '){1}$#i', basename( $src ), $filename ) ) {
456	$fullsize_url = true;
457	}
458
459	// Build URL, first maybe removing WP's resized string so we pass the original image to Photon
460	if ( ! $fullsize_url && 0 === strpos( $src, $upload_dir['baseurl'] ) ) {
461	$src = self::strip_image_dimensions_maybe( $src );
462	}
463
464	// Build array of Photon args and expose to filter before passing to Photon URL function
465	$args = array();
466
467	if ( false !== $width && false !== $height && false === strpos( $width, '%' ) && false === strpos( $height, '%' ) ) {
468	$args[ $transform ] = $width . ',' . $height;
469	} elseif ( false !== $width ) {
470	$args['w'] = $width;
471	} elseif ( false !== $height ) {
472	$args['h'] = $height;
473	}
474
475	/**
476	* Filter the array of Photon arguments added to an image when it goes through Photon.
477	* By default, only includes width and height values.
478	*
479	* @see https://developer.wordpress.com/docs/photon/api/
480	*
481	* @module photon
482	*
483	* @since 2.0.0
484	*
485	* @param array $args Array of Photon Arguments.
486	* @param array $details {
487	* Array of image details.
488	*
489	* @type string $tag Image tag (Image HTML output).
490	* @type string $src Image URL.
491	* @type string $src_orig Original Image URL.
492	* @type int\|false $width Image width.
493	* @type int\|false $height Image height.
494	* @type int\|false $width_orig Original image width before constrained by content_width.
495	* @type int\|false $height_orig Original Image height before constrained by content_width.
496	* @type string $transform Transform.
497	* @type string $transform_orig Original transform before constrained by content_width.
498	* }
499	*/
500	$args = apply_filters( 'jetpack_photon_post_image_args', $args, compact( 'tag', 'src', 'src_orig', 'width', 'height', 'width_orig', 'height_orig', 'transform', 'transform_orig' ) );
501
502	$photon_url = jetpack_photon_url( $src, $args );
503
504	// Modify image tag if Photon function provides a URL
505	// Ensure changes are only applied to the current image by copying and modifying the matched tag, then replacing the entire tag with our modified version.
506	if ( $src != $photon_url ) {
507	$new_tag = $tag;
508
509	// If present, replace the link href with a Photoned URL for the full-size image.
510	if ( ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) {
511	$new_tag = preg_replace( '#(href=["\|\'])' . $images['link_url'][ $index ] . '(["\|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $new_tag, 1 );
512	}
513
514	// Supplant the original source value with our Photon URL
515	$photon_url = esc_url( $photon_url );
516	$new_tag = str_replace( $src_orig, $photon_url, $new_tag );
517
518	// If Lazy Load is in use, pass placeholder image through Photon
519	if ( isset( $placeholder_src ) && self::validate_image_url( $placeholder_src ) ) {
520	$placeholder_src = jetpack_photon_url( $placeholder_src );
521
522	if ( $placeholder_src != $placeholder_src_orig ) {
523	$new_tag = str_replace( $placeholder_src_orig, esc_url( $placeholder_src ), $new_tag );
524	}
525
526	unset( $placeholder_src );
527	}
528
529	// If we are not transforming the image with resize, fit, or letterbox (lb), then we should remove
530	// the width and height arguments from the image to prevent distortion. Even if $args['w'] and $args['h']
531	// are present, Photon does not crop to those dimensions. Instead, it appears to favor height.
532	//
533	// If we are transforming the image via one of those methods, let's update the width and height attributes.
534	if ( empty( $args['resize'] ) && empty( $args['fit'] ) && empty( $args['lb'] ) ) {
535	$new_tag = preg_replace( '#(?<=\s)(width\|height)=["\|\']?[\d%]+["\|\']?\s?#i', '', $new_tag );
536	} else {
537	$resize_args = isset( $args['resize'] ) ? $args['resize'] : false;
538	if ( false == $resize_args ) {
539	$resize_args = ( ! $resize_args && isset( $args['fit'] ) )
540	? $args['fit']
541	: false;
542	}
543	if ( false == $resize_args ) {
544	$resize_args = ( ! $resize_args && isset( $args['lb'] ) )
545	? $args['lb']
546	: false;
547	}
548
549	$resize_args = array_map( 'trim', explode( ',', $resize_args ) );
550
551	// (?<=\s) - Ensure width or height attribute is preceded by a space
552	// (width=["\|\']?) - Matches, and captures, width=, width=", or width='
553	// [\d%]+ - Matches 1 or more digits
554	// (["\|\']?) - Matches, and captures, ", ', or empty string
555	// \s - Ensures there's a space after the attribute
556	$new_tag = preg_replace( '#(?<=\s)(width=["\|\']?)[\d%]+(["\|\']?)\s?#i', sprintf( '${1}%d${2} ', $resize_args[0] ), $new_tag );
557	$new_tag = preg_replace( '#(?<=\s)(height=["\|\']?)[\d%]+(["\|\']?)\s?#i', sprintf( '${1}%d${2} ', $resize_args[1] ), $new_tag );
558	}
559
560	// Tag an image for dimension checking
561	if ( ! self::is_amp_endpoint() ) {
562	$new_tag = preg_replace( '#(\s?/)?>(\s*</a>)?$#i', ' data-recalc-dims="1"\1>\2', $new_tag );
563	}
564
565	// Replace original tag with modified version
566	$content = str_replace( $tag, $new_tag, $content );
567	}
568	} elseif ( preg_match( '#^http(s)?://i[\d]{1}.wp.com#', $src ) && ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) {
569	$new_tag = preg_replace( '#(href=["\|\'])' . $images['link_url'][ $index ] . '(["\|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $tag, 1 );
570
571	$content = str_replace( $tag, $new_tag, $content );
572	}
573	}
574	}
575
576	return $content;
577	}
578
579	public static function filter_the_galleries( $galleries ) {
580	if ( empty( $galleries ) \|\| ! is_array( $galleries ) ) {
581	return $galleries;
582	}
583
584	// Pass by reference, so we can modify them in place.
585	foreach ( $galleries as &$this_gallery ) {
586	if ( is_string( $this_gallery ) ) {
587	$this_gallery = self::filter_the_content( $this_gallery );
588	// LEAVING COMMENTED OUT as for the moment it doesn't seem
589	// necessary and I'm not sure how it would propagate through.
590	// } elseif ( is_array( $this_gallery )
591	// && ! empty( $this_gallery['src'] )
592	// && ! empty( $this_gallery['type'] )
593	// && in_array( $this_gallery['type'], array( 'rectangle', 'square', 'circle' ) ) ) {
594	// $this_gallery['src'] = array_map( 'jetpack_photon_url', $this_gallery['src'] );
595	}
596	}
597	unset( $this_gallery ); // break the reference.
598
599	return $galleries;
600	}
601
602
603	/**
604	* Runs the image widget through photon.
605	*
606	* @param array $instance Image widget instance data.
607	* @return array
608	*/
609	public static function filter_the_image_widget( $instance ) {
610	if ( Jetpack::is_module_active( 'photon' ) && ! $instance['attachment_id'] && $instance['url'] ) {
611	jetpack_photon_url(
612	$instance['url'],
613	array(
614	'w' => $instance['width'],
615	'h' => $instance['height'],
616	)
617	);
618	}
619
620	return $instance;
621	}
622
623	/**
624	* * CORE IMAGE RETRIEVAL
625	**/
626
627	/**
628	* Filter post thumbnail image retrieval, passing images through Photon
629	*
630	* @param string\|bool $image
631	* @param int $attachment_id
632	* @param string\|array $size
633	* @uses is_admin, apply_filters, wp_get_attachment_url, self::validate_image_url, this::image_sizes, jetpack_photon_url
634	* @filter image_downsize
635	* @return string\|bool
636	*/
637	public function filter_image_downsize( $image, $attachment_id, $size ) {
638	// Don't foul up the admin side of things, unless a plugin wants to.
639	if ( is_admin() &&
640	/**
641	* Provide plugins a way of running Photon for images in the WordPress Dashboard (wp-admin).
642	*
643	* Note: enabling this will result in Photon URLs added to your post content, which could make migrations across domains (and off Photon) a bit more challenging.
644	*
645	* @module photon
646	*
647	* @since 4.8.0
648	*
649	* @param bool false Stop Photon from being run on the Dashboard. Default to false.
650	* @param array $args {
651	* Array of image details.
652	*
653	* @type $image Image URL.
654	* @type $attachment_id Attachment ID of the image.
655	* @type $size Image size. Can be a string (name of the image size, e.g. full) or an array of width and height.
656	* }
657	*/
658	false === apply_filters( 'jetpack_photon_admin_allow_image_downsize', false, compact( 'image', 'attachment_id', 'size' ) )
659	) {
660	return $image;
661	}
662
663	/**
664	* Provide plugins a way of preventing Photon from being applied to images retrieved from WordPress Core.
665	*
666	* @module photon
667	*
668	* @since 2.0.0
669	*
670	* @param bool false Stop Photon from being applied to the image. Default to false.
671	* @param array $args {
672	* Array of image details.
673	*
674	* @type $image Image URL.
675	* @type $attachment_id Attachment ID of the image.
676	* @type $size Image size. Can be a string (name of the image size, e.g. full) or an array of width and height.
677	* }
678	*/
679	if ( apply_filters( 'jetpack_photon_override_image_downsize', false, compact( 'image', 'attachment_id', 'size' ) ) ) {
680	return $image;
681	}
682
683	// Get the image URL and proceed with Photon-ification if successful
684	$image_url = wp_get_attachment_url( $attachment_id );
685
686	// Set this to true later when we know we have size meta.
687	$has_size_meta = false;
688
689	if ( $image_url ) {
690	// Check if image URL should be used with Photon
691	if ( ! self::validate_image_url( $image_url ) ) {
692	return $image;
693	}
694
695	$intermediate = true; // For the fourth array item returned by the image_downsize filter.
696
697	// If an image is requested with a size known to WordPress, use that size's settings with Photon.
698	// WP states that `add_image_size()` should use a string for the name, but doesn't enforce that.
699	// Due to differences in how Core and Photon check for the registered image size, we check both types.
700	if ( ( is_string( $size ) \|\| is_int( $size ) ) && array_key_exists( $size, self::image_sizes() ) ) {
701	$image_args = self::image_sizes();
702	$image_args = $image_args[ $size ];
703
704	$photon_args = array();
705
706	$image_meta = image_get_intermediate_size( $attachment_id, $size );
707
708	// 'full' is a special case: We need consistent data regardless of the requested size.
709	if ( 'full' == $size ) {
710	$image_meta = wp_get_attachment_metadata( $attachment_id );
711	$intermediate = false;
712	} elseif ( ! $image_meta ) {
713	// If we still don't have any image meta at this point, it's probably from a custom thumbnail size
714	// for an image that was uploaded before the custom image was added to the theme. Try to determine the size manually.
715	$image_meta = wp_get_attachment_metadata( $attachment_id );
716
717	if ( isset( $image_meta['width'], $image_meta['height'] ) ) {
718	$image_resized = image_resize_dimensions( $image_meta['width'], $image_meta['height'], $image_args['width'], $image_args['height'], $image_args['crop'] );
719	if ( $image_resized ) { // This could be false when the requested image size is larger than the full-size image.
720	$image_meta['width'] = $image_resized[6];
721	$image_meta['height'] = $image_resized[7];
722	}
723	}
724	}
725
726	if ( isset( $image_meta['width'], $image_meta['height'] ) ) {
727	$image_args['width'] = $image_meta['width'];
728	$image_args['height'] = $image_meta['height'];
729
730	list( $image_args['width'], $image_args['height'] ) = image_constrain_size_for_editor( $image_args['width'], $image_args['height'], $size, 'display' );
731	$has_size_meta = true;
732	}
733
734	// Expose determined arguments to a filter before passing to Photon
735	$transform = $image_args['crop'] ? 'resize' : 'fit';
736
737	// Check specified image dimensions and account for possible zero values; photon fails to resize if a dimension is zero.
738	if ( 0 == $image_args['width'] \|\| 0 == $image_args['height'] ) {
739	if ( 0 == $image_args['width'] && 0 < $image_args['height'] ) {
740	$photon_args['h'] = $image_args['height'];
741	} elseif ( 0 == $image_args['height'] && 0 < $image_args['width'] ) {
742	$photon_args['w'] = $image_args['width'];
743	}
744	} else {
745	if ( ( 'resize' === $transform ) && $image_meta = wp_get_attachment_metadata( $attachment_id ) ) {
746	if ( isset( $image_meta['width'], $image_meta['height'] ) ) {
747	// Lets make sure that we don't upscale images since wp never upscales them as well
748	$smaller_width = ( ( $image_meta['width'] < $image_args['width'] ) ? $image_meta['width'] : $image_args['width'] );
749	$smaller_height = ( ( $image_meta['height'] < $image_args['height'] ) ? $image_meta['height'] : $image_args['height'] );
750
751	$photon_args[ $transform ] = $smaller_width . ',' . $smaller_height;
752	}
753	} else {
754	$photon_args[ $transform ] = $image_args['width'] . ',' . $image_args['height'];
755	}
756	}
757
758	/**
759	* Filter the Photon Arguments added to an image when going through Photon, when that image size is a string.
760	* Image size will be a string (e.g. "full", "medium") when it is known to WordPress.
761	*
762	* @module photon
763	*
764	* @since 2.0.0
765	*
766	* @param array $photon_args Array of Photon arguments.
767	* @param array $args {
768	* Array of image details.
769	*
770	* @type $image_args Array of Image arguments (width, height, crop).
771	* @type $image_url Image URL.
772	* @type $attachment_id Attachment ID of the image.
773	* @type $size Image size. Can be a string (name of the image size, e.g. full) or an integer.
774	* @type $transform Value can be resize or fit.
775	* @see https://developer.wordpress.com/docs/photon/api
776	* }
777	*/
778	$photon_args = apply_filters( 'jetpack_photon_image_downsize_string', $photon_args, compact( 'image_args', 'image_url', 'attachment_id', 'size', 'transform' ) );
779
780	// Generate Photon URL
781	$image = array(
782	jetpack_photon_url( $image_url, $photon_args ),
783	$has_size_meta ? $image_args['width'] : false,
784	$has_size_meta ? $image_args['height'] : false,
785	$intermediate,
786	);
787	} elseif ( is_array( $size ) ) {
788	// Pull width and height values from the provided array, if possible
789	$width = isset( $size[0] ) ? (int) $size[0] : false;
790	$height = isset( $size[1] ) ? (int) $size[1] : false;
791
792	// Don't bother if necessary parameters aren't passed.
793	if ( ! $width \|\| ! $height ) {
794	return $image;
795	}
796
797	$image_meta = wp_get_attachment_metadata( $attachment_id );
798	if ( isset( $image_meta['width'], $image_meta['height'] ) ) {
799	$image_resized = image_resize_dimensions( $image_meta['width'], $image_meta['height'], $width, $height );
800
801	if ( $image_resized ) { // This could be false when the requested image size is larger than the full-size image.
802	$width = $image_resized[6];
803	$height = $image_resized[7];
804	} else {
805	$width = $image_meta['width'];
806	$height = $image_meta['height'];
807	}
808
809	$has_size_meta = true;
810	}
811
812	list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size );
813
814	// Expose arguments to a filter before passing to Photon
815	$photon_args = array(
816	'fit' => $width . ',' . $height,
817	);
818
819	/**
820	* Filter the Photon Arguments added to an image when going through Photon,
821	* when the image size is an array of height and width values.
822	*
823	* @module photon
824	*
825	* @since 2.0.0
826	*
827	* @param array $photon_args Array of Photon arguments.
828	* @param array $args {
829	* Array of image details.
830	*
831	* @type $width Image width.
832	* @type height Image height.
833	* @type $image_url Image URL.
834	* @type $attachment_id Attachment ID of the image.
835	* }
836	*/
837	$photon_args = apply_filters( 'jetpack_photon_image_downsize_array', $photon_args, compact( 'width', 'height', 'image_url', 'attachment_id' ) );
838
839	// Generate Photon URL
840	$image = array(
841	jetpack_photon_url( $image_url, $photon_args ),
842	$has_size_meta ? $width : false,
843	$has_size_meta ? $height : false,
844	$intermediate,
845	);
846	}
847	}
848
849	return $image;
850	}
851
852	/**
853	* Filters an array of image `srcset` values, replacing each URL with its Photon equivalent.
854	*
855	* @since 3.8.0
856	* @since 4.0.4 Added automatically additional sizes beyond declared image sizes.
857	* @param array $sources An array of image urls and widths.
858	* @uses self::validate_image_url, jetpack_photon_url, Jetpack_Photon::parse_from_filename
859	* @uses Jetpack_Photon::strip_image_dimensions_maybe, Jetpack::get_content_width
860	* @return array An array of Photon image urls and widths.
861	*/
862	public function filter_srcset_array( $sources = array(), $size_array = array(), $image_src = array(), $image_meta = array(), $attachment_id = 0 ) {
863	if ( ! is_array( $sources ) ) {
864	return $sources;
865	}
866	$upload_dir = wp_get_upload_dir();
867
868	foreach ( $sources as $i => $source ) {
869	if ( ! self::validate_image_url( $source['url'] ) ) {
870	continue;
871	}
872
873	/** This filter is already documented in class.photon.php */
874	if ( apply_filters( 'jetpack_photon_skip_image', false, $source['url'], $source ) ) {
875	continue;
876	}
877
878	$url = $source['url'];
879	list( $width, $height ) = self::parse_dimensions_from_filename( $url );
880
881	// It's quicker to get the full size with the data we have already, if available
882	if ( ! empty( $attachment_id ) ) {
883	$url = wp_get_attachment_url( $attachment_id );
884	} else {
885	$url = self::strip_image_dimensions_maybe( $url );
886	}
887
888	$args = array();
889	if ( 'w' === $source['descriptor'] ) {
890	if ( $height && ( $source['value'] == $width ) ) {
891	$args['resize'] = $width . ',' . $height;
892	} else {
893	$args['w'] = $source['value'];
894	}
895	}
896
897	$sources[ $i ]['url'] = jetpack_photon_url( $url, $args );
898	}
899
900	/**
901	* At this point, $sources is the original srcset with Photonized URLs.
902	* Now, we're going to construct additional sizes based on multiples of the content_width.
903	* This will reduce the gap between the largest defined size and the original image.
904	*/
905
906	/**
907	* Filter the multiplier Photon uses to create new srcset items.
908	* Return false to short-circuit and bypass auto-generation.
909	*
910	* @module photon
911	*
912	* @since 4.0.4
913	*
914	* @param array\|bool $multipliers Array of multipliers to use or false to bypass.
915	*/
916	$multipliers = apply_filters( 'jetpack_photon_srcset_multipliers', array( 2, 3 ) );
917	$url = trailingslashit( $upload_dir['baseurl'] ) . $image_meta['file'];
918
919	if (
920	/** Short-circuit via jetpack_photon_srcset_multipliers filter. */
921	is_array( $multipliers )
922	/** This filter is already documented in class.photon.php */
923	&& ! apply_filters( 'jetpack_photon_skip_image', false, $url, null )
924	/** Verify basic meta is intact. */
925	&& isset( $image_meta['width'] ) && isset( $image_meta['height'] ) && isset( $image_meta['file'] )
926	/** Verify we have the requested width/height. */
927	&& isset( $size_array[0] ) && isset( $size_array[1] )
928	) {
929
930	$fullwidth = $image_meta['width'];
931	$fullheight = $image_meta['height'];
932	$reqwidth = $size_array[0];
933	$reqheight = $size_array[1];
934
935	$constrained_size = wp_constrain_dimensions( $fullwidth, $fullheight, $reqwidth );
936	$expected_size = array( $reqwidth, $reqheight );
937
938	if ( abs( $constrained_size[0] - $expected_size[0] ) <= 1 && abs( $constrained_size[1] - $expected_size[1] ) <= 1 ) {
939	$crop = 'soft';
940	$base = Jetpack::get_content_width() ? Jetpack::get_content_width() : 1000; // Provide a default width if none set by the theme.
941	} else {
942	$crop = 'hard';
943	$base = $reqwidth;
944	}
945
946	$currentwidths = array_keys( $sources );
947	$newsources = null;
948
949	foreach ( $multipliers as $multiplier ) {
950
951	$newwidth = $base * $multiplier;
952	foreach ( $currentwidths as $currentwidth ) {
953	// If a new width would be within 100 pixes of an existing one or larger than the full size image, skip.
954	if ( abs( $currentwidth - $newwidth ) < 50 \|\| ( $newwidth > $fullwidth ) ) {
955	continue 2; // Back to the foreach ( $multipliers as $multiplier )
956	}
957	} // foreach ( $currentwidths as $currentwidth ){
958
959	if ( 'soft' == $crop ) {
960	$args = array(
961	'w' => $newwidth,
962	);
963	} else { // hard crop, e.g. add_image_size( 'example', 200, 200, true );
964	$args = array(
965	'zoom' => $multiplier,
966	'resize' => $reqwidth . ',' . $reqheight,
967	);
968	}
969
970	$newsources[ $newwidth ] = array(
971	'url' => jetpack_photon_url( $url, $args ),
972	'descriptor' => 'w',
973	'value' => $newwidth,
974	);
975	} // foreach ( $multipliers as $multiplier )
976	if ( is_array( $newsources ) ) {
977	$sources = array_replace( $sources, $newsources );
978	}
979	} // if ( isset( $image_meta['width'] ) && isset( $image_meta['file'] ) )
980
981	return $sources;
982	}
983
984	/**
985	* Filters an array of image `sizes` values, using $content_width instead of image's full size.
986	*
987	* @since 4.0.4
988	* @since 4.1.0 Returns early for images not within the_content.
989	* @param array $sizes An array of media query breakpoints.
990	* @param array $size Width and height of the image
991	* @uses Jetpack::get_content_width
992	* @return array An array of media query breakpoints.
993	*/
994	public function filter_sizes( $sizes, $size ) {
995	if ( ! doing_filter( 'the_content' ) ) {
996	return $sizes;
997	}
998	$content_width = Jetpack::get_content_width();
999	if ( ! $content_width ) {
1000	$content_width = 1000;
1001	}
1002
1003	if ( ( is_array( $size ) && $size[0] < $content_width ) ) {
1004	return $sizes;
1005	}
1006
1007	return sprintf( '(max-width: %1$dpx) 100vw, %1$dpx', $content_width );
1008	}
1009
1010	/**
1011	* * GENERAL FUNCTIONS
1012	**/
1013
1014	/**
1015	* Ensure image URL is valid for Photon.
1016	* Though Photon functions address some of the URL issues, we should avoid unnecessary processing if we know early on that the image isn't supported.
1017	*
1018	* @param string $url
1019	* @uses wp_parse_args
1020	* @return bool
1021	*/
1022	protected static function validate_image_url( $url ) {
1023	$parsed_url = wp_parse_url( $url );
1024
1025	if ( ! $parsed_url ) {
1026	return false;
1027	}
1028
1029	// Parse URL and ensure needed keys exist, since the array returned by `wp_parse_url` only includes the URL components it finds.
1030	$url_info = wp_parse_args(
1031	$parsed_url,
1032	array(
1033	'scheme' => null,
1034	'host' => null,
1035	'port' => null,
1036	'path' => null,
1037	)
1038	);
1039
1040	// Bail if scheme isn't http or port is set that isn't port 80
1041	if (
1042	( 'http' != $url_info['scheme'] \|\| ! in_array( $url_info['port'], array( 80, null ) ) ) &&
1043	/**
1044	* Allow Photon to fetch images that are served via HTTPS.
1045	*
1046	* @module photon
1047	*
1048	* @since 2.4.0
1049	* @since 3.9.0 Default to false.
1050	*
1051	* @param bool $reject_https Should Photon ignore images using the HTTPS scheme. Default to false.
1052	*/
1053	apply_filters( 'jetpack_photon_reject_https', false )
1054	) {
1055	return false;
1056	}
1057
1058	// Bail if no host is found
1059	if ( is_null( $url_info['host'] ) ) {
1060	return false;
1061	}
1062
1063	// Bail if the image alredy went through Photon
1064	if ( preg_match( '#^i[\d]{1}.wp.com$#i', $url_info['host'] ) ) {
1065	return false;
1066	}
1067
1068	// Bail if no path is found
1069	if ( is_null( $url_info['path'] ) ) {
1070	return false;
1071	}
1072
1073	// Ensure image extension is acceptable
1074	if ( ! in_array( strtolower( pathinfo( $url_info['path'], PATHINFO_EXTENSION ) ), self::$extensions ) ) {
1075	return false;
1076	}
1077
1078	// If we got this far, we should have an acceptable image URL
1079	// But let folks filter to decline if they prefer.
1080	/**
1081	* Overwrite the results of the validation steps an image goes through before to be considered valid to be used by Photon.
1082	*
1083	* @module photon
1084	*
1085	* @since 3.0.0
1086	*
1087	* @param bool true Is the image URL valid and can it be used by Photon. Default to true.
1088	* @param string $url Image URL.
1089	* @param array $parsed_url Array of information about the image.
1090	*/
1091	return apply_filters( 'photon_validate_image_url', true, $url, $parsed_url );
1092	}
1093
1094	/**
1095	* Checks if the file exists before it passes the file to photon
1096	*
1097	* @param string $src The image URL
1098	* @return string
1099	**/
1100	public static function strip_image_dimensions_maybe( $src ) {
1101	$stripped_src = $src;
1102
1103	// Build URL, first removing WP's resized string so we pass the original image to Photon
1104	if ( preg_match( '#(-\d+x\d+)\.(' . implode( '\|', self::$extensions ) . '){1}$#i', $src, $src_parts ) ) {
1105	$stripped_src = str_replace( $src_parts[1], '', $src );
1106	$upload_dir = wp_get_upload_dir();
1107
1108	// Extracts the file path to the image minus the base url
1109	$file_path = substr( $stripped_src, strlen( $upload_dir['baseurl'] ) );
1110
1111	if ( file_exists( $upload_dir['basedir'] . $file_path ) ) {
1112	$src = $stripped_src;
1113	}
1114	}
1115
1116	return $src;
1117	}
1118
1119	/**
1120	* Provide an array of available image sizes and corresponding dimensions.
1121	* Similar to get_intermediate_image_sizes() except that it includes image sizes' dimensions, not just their names.
1122	*
1123	* @global $wp_additional_image_sizes
1124	* @uses get_option
1125	* @return array
1126	*/
1127	protected static function image_sizes() {
1128	if ( null == self::$image_sizes ) {
1129	global $_wp_additional_image_sizes;
1130
1131	// Populate an array matching the data structure of $_wp_additional_image_sizes so we have a consistent structure for image sizes
1132	$images = array(
1133	'thumb' => array(
1134	'width' => intval( get_option( 'thumbnail_size_w' ) ),
1135	'height' => intval( get_option( 'thumbnail_size_h' ) ),
1136	'crop' => (bool) get_option( 'thumbnail_crop' ),
1137	),
1138	'medium' => array(
1139	'width' => intval( get_option( 'medium_size_w' ) ),
1140	'height' => intval( get_option( 'medium_size_h' ) ),
1141	'crop' => false,
1142	),
1143	'medium_large' => array(
1144	'width' => intval( get_option( 'medium_large_size_w' ) ),
1145	'height' => intval( get_option( 'medium_large_size_h' ) ),
1146	'crop' => false,
1147	),
1148	'large' => array(
1149	'width' => intval( get_option( 'large_size_w' ) ),
1150	'height' => intval( get_option( 'large_size_h' ) ),
1151	'crop' => false,
1152	),
1153	'full' => array(
1154	'width' => null,
1155	'height' => null,
1156	'crop' => false,
1157	),
1158	);
1159
1160	// Compatibility mapping as found in wp-includes/media.php
1161	$images['thumbnail'] = $images['thumb'];
1162
1163	// Update class variable, merging in $_wp_additional_image_sizes if any are set
1164	if ( is_array( $_wp_additional_image_sizes ) && ! empty( $_wp_additional_image_sizes ) ) {
1165	self::$image_sizes = array_merge( $images, $_wp_additional_image_sizes );
1166	} else {
1167	self::$image_sizes = $images;
1168	}
1169	}
1170
1171	return is_array( self::$image_sizes ) ? self::$image_sizes : array();
1172	}
1173
1174	/**
1175	* Pass og:image URLs through Photon
1176	*
1177	* @param array $tags
1178	* @param array $parameters
1179	* @uses jetpack_photon_url
1180	* @return array
1181	*/
1182	function filter_open_graph_tags( $tags, $parameters ) {
1183	if ( empty( $tags['og:image'] ) ) {
1184	return $tags;
1185	}
1186
1187	$photon_args = array(
1188	'fit' => sprintf( '%d,%d', 2 * $parameters['image_width'], 2 * $parameters['image_height'] ),
1189	);
1190
1191	if ( is_array( $tags['og:image'] ) ) {
1192	$images = array();
1193	foreach ( $tags['og:image'] as $image ) {
1194	$images[] = jetpack_photon_url( $image, $photon_args );
1195	}
1196	$tags['og:image'] = $images;
1197	} else {
1198	$tags['og:image'] = jetpack_photon_url( $tags['og:image'], $photon_args );
1199	}
1200
1201	return $tags;
1202	}
1203
1204	public function noresize_intermediate_sizes( $sizes ) {
1205	return __return_empty_array();
1206	}
1207
1208	/**
1209	* Enqueue Photon helper script
1210	*
1211	* @uses wp_enqueue_script, plugins_url
1212	* @action wp_enqueue_script
1213	* @return null
1214	*/
1215	public function action_wp_enqueue_scripts() {
1216	if ( self::is_amp_endpoint() ) {
1217	return;
1218	}
1219	wp_enqueue_script(
1220	'jetpack-photon',
1221	Assets::get_file_url_for_environment(
1222	'_inc/build/photon/photon.min.js',
1223	'modules/photon/photon.js'
1224	),
1225	array(),
1226	20191001,
1227	true
1228	);
1229	}
1230
1231	/**
1232	* Determine if image_downsize should utilize Photon via REST API.
1233	*
1234	* The WordPress Block Editor (Gutenberg) and other REST API consumers using the wp/v2/media endpoint, especially in the "edit"
1235	* context is more akin to the is_admin usage of Photon (see filter_image_downsize). Since consumers are trying to edit content in posts,
1236	* Photon should not fire as it will fire later on display. By aborting an attempt to Photonize an image here, we
1237	* prevents issues like https://github.com/Automattic/jetpack/issues/10580 .
1238	*
1239	* To determine if we're using the wp/v2/media endpoint, we hook onto the `rest_request_before_callbacks` filter and
1240	* if determined we are using it in the edit context, we'll false out the `jetpack_photon_override_image_downsize` filter.
1241	*
1242	* @see Jetpack_Photon::filter_image_downsize()
1243	*
1244	* @param null\|WP_Error $response
1245	* @param array $endpoint_data
1246	* @param WP_REST_Request $request Request used to generate the response.
1247	*
1248	* @return null\|WP_Error The original response object without modification.
1249	*/
1250	public function should_rest_photon_image_downsize( $response, $endpoint_data, $request ) {
1251	if ( ! is_a( $request, 'WP_REST_Request' ) ) {
1252	return $response; // Something odd is happening. Do nothing and return the response.
1253	}
1254
1255	if ( is_wp_error( $response ) ) {
1256	// If we're going to return an error, we don't need to do anything with Photon.
1257	return $response;
1258	}
1259
1260	$this->should_rest_photon_image_downsize_override( $request );
1261
1262	return $response;
1263
1264	}
1265
1266	/**
1267	* Helper function to check if a WP_REST_Request is the media endpoint in the edit context.
1268	*
1269	* @param WP_REST_Request $request The current REST request.
1270	*/
1271	private function should_rest_photon_image_downsize_override( WP_REST_Request $request ) {
1272	$route = $request->get_route();
1273
1274	if ( false !== strpos( $route, 'wp/v2/media' ) && 'edit' === $request->get_param( 'context' ) ) {
1275	// Don't use `__return_true()`: Use something unique. See ::_override_image_downsize_in_rest_edit_context()
1276	// Late execution to avoid conflict with other plugins as we really don't want to run in this situation.
1277	add_filter(
1278	'jetpack_photon_override_image_downsize',
1279	array(
1280	$this,
1281	'override_image_downsize_in_rest_edit_context',
1282	),
1283	999999
1284	);
1285	}
1286	}
1287
1288	/**
1289	* Brings in should_rest_photon_image_downsize for the rest_after_insert_attachment hook.
1290	*
1291	* @since 8.7.0
1292	*
1293	* @param WP_Post $attachment Inserted or updated attachment object.
1294	* @param WP_REST_Request $request Request object.
1295	*/
1296	public function should_rest_photon_image_downsize_insert_attachment( WP_Post $attachment, WP_REST_Request $request ) {
1297	if ( ! is_a( $request, 'WP_REST_Request' ) ) {
1298	// Something odd is happening.
1299	return;
1300	}
1301
1302	$this->should_rest_photon_image_downsize_override( $request );
1303
1304	}
1305
1306	/**
1307	* Remove the override we may have added in ::should_rest_photon_image_downsize()
1308	* Since ::_override_image_downsize_in_rest_edit_context() is only
1309	* every used here, we can always remove it without ever worrying
1310	* about breaking any other configuration.
1311	*
1312	* @param mixed $response REST API Response.
1313	* @return mixed Unchanged $response
1314	*/
1315	public function cleanup_rest_photon_image_downsize( $response ) {
1316	remove_filter(
1317	'jetpack_photon_override_image_downsize',
1318	array(
1319	$this,
1320	'override_image_downsize_in_rest_edit_context',
1321	),
1322	999999
1323	);
1324	return $response;
1325	}
1326
1327	/**
1328	* Used internally by ::should_rest_photon_image_downsize() to not photonize
1329	* image URLs in ?context=edit REST requests.
1330	* MUST NOT be used anywhere else.
1331	* We use a unique function instead of __return_true so that we can clean up
1332	* after ourselves without breaking anyone else's filters.
1333	*
1334	* @internal
1335	* @return true
1336	*/
1337	public function override_image_downsize_in_rest_edit_context() {
1338	return true;
1339	}
1340
1341	/**
1342	* Return whether the current page is AMP.
1343	*
1344	* This is only present for the sake of WordPress.com where the Jetpack_AMP_Support
1345	* class does not yet exist. This mehod may only be called at the wp action or later.
1346	*
1347	* @return bool Whether AMP page.
1348	*/
1349	private static function is_amp_endpoint() {
1350	return class_exists( 'Jetpack_AMP_Support' ) && Jetpack_AMP_Support::is_amp_request();
1351	}
1352	}
1353