class-counter.php — Post Views Counter 1.7.6

post-views-counter / includes / class-counter.php

post-views-counter / includes Last commit date

class-counter.php

1408 lines

1	<?php
2	// exit if accessed directly
3	if ( ! defined( 'ABSPATH' ) )
4	exit;
5
6	/**
7	* Post_Views_Counter_Counter class.
8	*
9	* @class Post_Views_Counter_Counter
10	*/
11	class Post_Views_Counter_Counter {
12
13	private $storage = [];
14	private $storage_type = 'cookies';
15	private $queue = [];
16	private $queue_mode = false;
17	private $db_insert_values = '';
18	private $cookie = [
19	'exists' => false,
20	'visited_posts' => [],
21	'expiration' => 0
22	];
23
24	/**
25	* Class constructor.
26	*
27	* @return void
28	*/
29	public function __construct() {
30	// actions
31	add_action( 'plugins_loaded', [ $this, 'check_cookie' ], 1 );
32	add_action( 'init', [ $this, 'init_counter' ] );
33	add_action( 'deleted_post', [ $this, 'delete_post_views' ] );
34	}
35
36	/**
37	* Add Post ID to queue.
38	*
39	* @param int $post_id
40	*
41	* @return void
42	*/
43	public function add_to_queue( $post_id ) {
44	$this->queue[] = (int) $post_id;
45	}
46
47	/**
48	* Run manual pvc_view_post queue.
49	*
50	* @return void
51	*/
52	public function queue_count() {
53	// check conditions
54	if ( ! isset( $_POST['action'], $_POST['ids'], $_POST['pvc_nonce'] ) \|\| ! wp_verify_nonce( $_POST['pvc_nonce'], 'pvc-view-posts' ) \|\| $_POST['ids'] === '' \|\| ! is_string( $_POST['ids'] ) )
55	exit;
56
57	// get post ids
58	$ids = explode( ',', $_POST['ids'] );
59
60	$counted = [];
61
62	if ( ! empty( $ids ) ) {
63	$ids = array_filter( array_map( 'intval', $ids ) );
64
65	if ( ! empty( $ids ) ) {
66	// turn on queue mode
67	$this->queue_mode = true;
68
69	foreach ( $ids as $id ) {
70	$counted[$id] = ! ( $this->check_post( $id ) === null );
71	}
72
73	// turn off queue mode
74	$this->queue_mode = false;
75	}
76	}
77
78	echo wp_json_encode(
79	[
80	'post_ids' => $ids,
81	'counted' => $counted
82	]
83	);
84
85	exit;
86	}
87
88	/**
89	* Print JavaScript with queue in the footer.
90	*
91	* @return void
92	*/
93	public function print_queue_count() {
94	// get main instance
95	$pvc = Post_Views_Counter();
96
97	// only load manual counter for js mode, not for rest_api mode
98	if ( $pvc->options['general']['counter_mode'] !== 'js' )
99	return;
100
101	// any ids to "view"?
102	if ( ! empty( $this->queue ) ) {
103	echo "
104	<script>
105	( function( window, document, undefined ) {
106	document.addEventListener( 'DOMContentLoaded', function() {
107	let pvcLoadManualCounter = function( url, counter ) {
108	let pvcScriptTag = document.createElement( 'script' );
109
110	// append script
111	document.body.appendChild( pvcScriptTag );
112
113	// set attributes
114	pvcScriptTag.onload = counter;
115	pvcScriptTag.onreadystatechange = counter;
116	pvcScriptTag.src = url;
117	};
118
119	let pvcExecuteManualCounter = function() {
120	let pvcManualCounterArgs = {
121	url: '" . esc_url( admin_url( 'admin-ajax.php' ) ) . "',
122	nonce: '" . wp_create_nonce( 'pvc-view-posts' ) . "',
123	ids: '" . implode( ',', $this->queue ) . "'
124	};
125
126	// main javascript file was loaded?
127	if ( typeof PostViewsCounter !== 'undefined' && PostViewsCounter.promise !== null ) {
128	PostViewsCounter.promise.then( function() {
129	PostViewsCounterManual.init( pvcManualCounterArgs );
130	} );
131	// PostViewsCounter is undefined or promise is null
132	} else {
133	PostViewsCounterManual.init( pvcManualCounterArgs );
134	}
135	}
136
137	pvcLoadManualCounter( '" . POST_VIEWS_COUNTER_URL . "/js/counter.js', pvcExecuteManualCounter );
138	}, false );
139	} )( window, document );
140	</script>";
141	}
142	}
143
144	/**
145	* Initialize counter.
146	*
147	* @return void
148	*/
149	public function init_counter() {
150	// admin?
151	if ( is_admin() && ! wp_doing_ajax() )
152	return;
153
154	// get main instance
155	$pvc = Post_Views_Counter();
156
157	// actions
158	add_action( 'wp_ajax_pvc-view-posts', [ $this, 'queue_count' ] );
159	add_action( 'wp_ajax_nopriv_pvc-view-posts', [ $this, 'queue_count' ] );
160	add_action( 'wp_print_footer_scripts', [ $this, 'print_queue_count' ], 11 );
161
162	// php counter
163	if ( $pvc->options['general']['counter_mode'] === 'php' )
164	add_action( 'wp', [ $this, 'check_post_php' ] );
165	// javascript (ajax) counter
166	elseif ( $pvc->options['general']['counter_mode'] === 'js' ) {
167	add_action( 'wp_ajax_pvc-check-post', [ $this, 'check_post_js' ] );
168	add_action( 'wp_ajax_nopriv_pvc-check-post', [ $this, 'check_post_js' ] );
169	}
170
171	// rest api
172	add_action( 'rest_api_init', [ $this, 'rest_api_init' ] );
173	}
174
175	/**
176	* Check whether to count visit.
177	*
178	* @param int $post_id
179	* @param array $content_data
180	*
181	* @return null\|int
182	*/
183	public function check_post( $post_id = 0, $content_data = [] ) {
184	// force check cookie in short init mode
185	if ( defined( 'SHORTINIT' ) && SHORTINIT )
186	$this->check_cookie();
187
188	// get post id
189	$post_id = (int) ( empty( $post_id ) ? get_the_ID() : $post_id );
190
191	// empty id?
192	if ( empty( $post_id ) )
193	return null;
194
195	// get main instance
196	$pvc = Post_Views_Counter();
197
198	// get user id, from current user or static var in rest api request
199	$user_id = get_current_user_id();
200
201	// get user ip address
202	$user_ip = $this->get_user_ip();
203
204	// before visit action
205	do_action( 'pvc_before_check_visit', $post_id, $user_id, $user_ip, 'post', $content_data );
206
207	// check all conditions to count visit
208	add_filter( 'pvc_count_conditions_met', [ $this, 'check_conditions' ], 10, 6 );
209
210	// check conditions - excluded ips, excluded groups
211	$conditions_met = apply_filters( 'pvc_count_conditions_met', true, $post_id, $user_id, $user_ip, 'post', $content_data );
212
213	// conditions failed?
214	if ( ! $conditions_met )
215	return null;
216
217	// do not count visit by default
218	$count_visit = false;
219
220	// cookieless data storage?
221	if ( $pvc->options['general']['data_storage'] === 'cookieless' && $this->storage_type === 'cookieless' ) {
222	$count_visit = $this->save_data_storage( $post_id, 'post', $content_data );
223	} elseif ( $pvc->options['general']['data_storage'] === 'cookies' && $this->storage_type === 'cookies' ) {
224	// php counter mode?
225	if ( $pvc->options['general']['counter_mode'] === 'php' ) {
226	if ( $this->cookie['exists'] ) {
227	// update cookie
228	$count_visit = $this->save_cookie( $post_id, $this->cookie );
229	} else {
230	// set new cookie
231	$count_visit = $this->save_cookie( $post_id );
232	}
233	} else
234	$count_visit = $this->save_cookie_storage( $post_id, $content_data );
235	}
236
237	// filter visit counting
238	$count_visit = (bool) apply_filters( 'pvc_count_visit', $count_visit, $post_id, $user_id, $user_ip, 'post', $content_data );
239
240	// count visit
241	if ( $count_visit ) {
242	// before count visit action
243	do_action( 'pvc_before_count_visit', $post_id, $user_id, $user_ip, 'post', $content_data );
244
245	return $this->count_visit( $post_id );
246	}
247	}
248
249	/**
250	* Check whether counting conditions are met.
251	*
252	* @param bool $allow_counting
253	* @param int $post_id
254	* @param int $user_id
255	* @param string $user_ip
256	* @param string $content_type
257	* @param array $content_data
258	*
259	* @return bool
260	*/
261	public function check_conditions( $allow_counting, $post_id, $user_id, $user_ip, $content_type, $content_data ) {
262	// already failed?
263	if ( ! $allow_counting )
264	return false;
265
266	// get main instance
267	$pvc = Post_Views_Counter();
268
269	// get ips
270	$ips = $pvc->options['general']['exclude_ips'];
271
272	// whether to count this ip
273	if ( ! empty( $ips ) && filter_var( preg_replace( '/[^0-9a-fA-F:., ]/', '', $user_ip ), FILTER_VALIDATE_IP ) ) {
274	// check ips
275	foreach ( $ips as $ip ) {
276	if ( strpos( $ip, '*' ) !== false ) {
277	if ( $this->ipv4_in_range( $user_ip, $ip ) )
278	return false;
279	} else {
280	if ( $user_ip === $ip )
281	return false;
282	}
283	}
284	}
285
286	// get groups to check them faster
287	$groups = $pvc->options['general']['exclude']['groups'];
288
289	// whether to count this user
290	if ( ! empty( $user_id ) ) {
291	// exclude logged in users?
292	if ( in_array( 'users', $groups, true ) )
293	return false;
294	// exclude specific roles?
295	elseif ( in_array( 'roles', $groups, true ) && $this->is_user_role_excluded( $user_id, $pvc->options['general']['exclude']['roles'] ) )
296	return false;
297	// exclude guests?
298	} elseif ( in_array( 'guests', $groups, true ) )
299	return false;
300
301	// whether to count robots
302	if ( in_array( 'robots', $groups, true ) && $pvc->crawler->is_crawler() )
303	return false;
304
305	return $allow_counting;
306	}
307
308	/**
309	* Check whether real home page is displayed.
310	*
311	* @param object $object
312	*
313	* @return bool
314	*/
315	public function is_homepage( $object ) {
316	$is_homepage = false;
317
318	// get show on front option
319	$show_on_front = get_option( 'show_on_front' );
320
321	if ( $show_on_front === 'posts' )
322	$is_homepage = is_home() && is_front_page();
323	else {
324	// home page
325	$homepage = (int) get_option( 'page_on_front' );
326
327	// posts page
328	$postspage = (int) get_option( 'page_for_posts' );
329
330	// both pages are set
331	if ( $homepage && $postspage )
332	$is_homepage = is_front_page();
333	// only home page is set
334	elseif ( $homepage && ! $postspage )
335	$is_homepage = is_front_page();
336	// only posts page is set
337	elseif( ! $homepage && $postspage )
338	$is_homepage = is_home() && ( empty( $object ) \|\| get_queried_object_id() === 0 );
339	}
340
341	return $is_homepage;
342	}
343
344	/**
345	* Check whether posts page (archive) is displayed.
346	*
347	* @param object $object
348	*
349	* @return bool
350	*/
351	public function is_posts_page( $object ) {
352	// get show on front option
353	$show_on_front = get_option( 'show_on_front' );
354
355	// get page for posts option
356	$page_for_posts = (int) get_option( 'page_for_posts' );
357
358	// check page
359	$result = ( $show_on_front === 'page' && ! empty( $object ) && is_home() && is_a( $object, 'WP_Post' ) && (int) $object->ID === $page_for_posts );
360
361	return apply_filters( 'pvc_is_posts_page', $result, $object );
362	}
363
364	/**
365	* Check whether to count visit via PHP request.
366	*
367	* @return void
368	*/
369	public function check_post_php() {
370	// do not count admin entries
371	if ( is_admin() && ! wp_doing_ajax() )
372	return;
373
374	// skip special requests
375	if ( is_preview() \|\| is_feed() \|\| is_trackback() \|\| ( function_exists( 'is_favicon' ) && is_favicon() ) \|\| is_customize_preview() )
376	return;
377
378	// get main instance
379	$pvc = Post_Views_Counter();
380
381	// do we use php as counter?
382	if ( $pvc->options['general']['counter_mode'] !== 'php' )
383	return;
384
385	// get countable post types
386	$post_types = $pvc->options['general']['post_types_count'];
387
388	// whether to count this post type
389	if ( empty( $post_types ) \|\| ! is_singular( $post_types ) )
390	return;
391
392	// get current post id
393	$post_id = (int) get_the_ID();
394
395	// allow to run check post?
396	if ( ! (bool) apply_filters( 'pvc_run_check_post', true, $post_id ) )
397	return;
398
399	$this->check_post( $post_id );
400	}
401
402	/**
403	* Check whether to count visit via JavaScript (AJAX) request.
404	*
405	* @return void
406	*/
407	public function check_post_js() {
408	// check conditions
409	if ( ! isset( $_POST['action'], $_POST['id'], $_POST['storage_type'], $_POST['storage_data'], $_POST['pvc_nonce'] ) \|\| ! wp_verify_nonce( $_POST['pvc_nonce'], 'pvc-check-post' ) )
410	exit;
411
412	// get post id
413	$post_id = (int) $_POST['id'];
414
415	if ( $post_id <= 0 )
416	exit;
417
418	// get main instance
419	$pvc = Post_Views_Counter();
420
421	// do we use javascript as counter?
422	if ( $pvc->options['general']['counter_mode'] !== 'js' )
423	exit;
424
425	// get countable post types
426	$post_types = $pvc->options['general']['post_types_count'];
427
428	// check if post exists
429	$post = get_post( $post_id );
430
431	// whether to count this post type or not
432	if ( empty( $post_types ) \|\| empty( $post ) \|\| ! in_array( $post->post_type, $post_types, true ) )
433	exit;
434
435	// get storage type
436	$storage_type = sanitize_key( $_POST['storage_type'] );
437
438	// invalid storage type?
439	if ( ! in_array( $storage_type, [ 'cookies', 'cookieless' ], true ) )
440	exit;
441
442	// set storage type
443	$this->storage_type = $storage_type;
444
445	// cookieless data storage?
446	if ( $storage_type === 'cookieless' && $pvc->options['general']['data_storage'] === 'cookieless' ) {
447	// sanitize storage data
448	$storage_data = $this->sanitize_storage_data( $_POST['storage_data'] );
449	// cookies?
450	} elseif ( $storage_type === 'cookies' && $pvc->options['general']['data_storage'] === 'cookies' ) {
451	// sanitize cookies data
452	$storage_data = $this->sanitize_cookies_data( $_POST['storage_data'] );
453	} else
454	$storage_data = [];
455
456	echo wp_json_encode(
457	[
458	'post_id' => $post_id,
459	'counted' => ! ( $this->check_post( $post_id, $storage_data ) === null ),
460	'storage' => $this->storage,
461	'type' => 'post'
462	]
463	);
464
465	exit;
466	}
467
468	/**
469	* Check whether to count visit via REST API request.
470	*
471	* @param object $request
472	*
473	* @return object\|array
474	*/
475	public function check_post_rest_api( $request ) {
476	// get main instance
477	$pvc = Post_Views_Counter();
478
479	// get post id (already sanitized)
480	$post_id = $request->get_param( 'id' );
481
482	// do we use REST API as counter?
483	if ( $pvc->options['general']['counter_mode'] !== 'rest_api' )
484	return new WP_Error( 'pvc_rest_api_disabled', __( 'REST API method is disabled.', 'post-views-counter' ), [ 'status' => 404 ] );
485
486	//TODO get current user id in direct api endpoint calls
487	// check if post exists
488	$post = get_post( $post_id );
489
490	if ( ! $post )
491	return new WP_Error( 'pvc_post_invalid_id', __( 'Invalid post ID.', 'post-views-counter' ), [ 'status' => 404 ] );
492
493	// get countable post types
494	$post_types = $pvc->options['general']['post_types_count'];
495
496	// whether to count this post type
497	if ( empty( $post_types ) \|\| ! in_array( $post->post_type, $post_types, true ) )
498	return new WP_Error( 'pvc_post_type_excluded', __( 'Post type excluded.', 'post-views-counter' ), [ 'status' => 404 ] );
499
500	// get storage type
501	$storage_type = sanitize_key( $request->get_param( 'storage_type' ) );
502
503	// invalid storage type?
504	if ( ! in_array( $storage_type, [ 'cookies', 'cookieless' ], true ) )
505	return new WP_Error( 'pvc_invalid_storage_type', __( 'Invalid storage type.', 'post-views-counter' ), [ 'status' => 404 ] );
506
507	// apply crawler/bot check filter
508	$allowed = apply_filters( 'pvc_rest_api_count_post_check', true, $request, $post_id );
509
510	if ( ! $allowed ) {
511	return new WP_REST_Response( [
512	'post_id' => $post_id,
513	'counted' => false,
514	'reason' => 'filtered',
515	'storage' => [],
516	'type' => 'post'
517	], 200 );
518	}
519
520	// set storage type
521	$this->storage_type = $storage_type;
522
523	// cookieless data storage?
524	if ( $storage_type === 'cookieless' && $pvc->options['general']['data_storage'] === 'cookieless' ) {
525	// sanitize storage data
526	$storage_data = $this->sanitize_storage_data( $request->get_param( 'storage_data' ) );
527	// cookies?
528	} elseif ( $storage_type === 'cookies' && $pvc->options['general']['data_storage'] === 'cookies' ) {
529	// sanitize cookies data
530	$storage_data = $this->sanitize_cookies_data( $request->get_param( 'storage_data' ) );
531	} else
532	$storage_data = [];
533
534	return [
535	'post_id' => $post_id,
536	'counted' => ! ( $this->check_post( $post_id, $storage_data ) === null ),
537	'storage' => $this->storage,
538	'type' => 'post'
539	];
540	}
541
542	/**
543	* Initialize cookie session. Use $cookie to force custom data instead of real $_COOKIE.
544	*
545	* @param array $cookie
546	*
547	* @return void
548	*/
549	public function check_cookie( $cookie = [] ) {
550	// do not run in admin except for ajax requests
551	if ( is_admin() && ! wp_doing_ajax() )
552	return;
553
554	if ( empty( $cookie ) \|\| ! is_array( $cookie ) ) {
555	// assign cookie name
556	$cookie_name = 'pvc_visits' . ( is_multisite() ? '_' . get_current_blog_id() : '' );
557
558	// is cookie set?
559	if ( isset( $_COOKIE[$cookie_name] ) && ! empty( $_COOKIE[$cookie_name] ) )
560	$cookie = $_COOKIE[$cookie_name];
561	}
562
563	// cookie data?
564	if ( $cookie && is_array( $cookie ) ) {
565	$visited_posts = $expirations = [];
566
567	foreach ( $cookie as $content ) {
568	// is cookie valid?
569	if ( preg_match( '/^(([0-9]+b[0-9]+a?)+)$/', $content ) === 1 ) {
570	// get single id with expiration
571	$expiration_ids = explode( 'a', $content );
572
573	// check every expiration => id pair
574	foreach ( $expiration_ids as $pair ) {
575	$pair = explode( 'b', $pair );
576	$expirations[] = (int) $pair[0];
577	$visited_posts[(int) $pair[1]] = (int) $pair[0];
578	}
579	}
580	}
581
582	// update cookie
583	$this->cookie = [
584	'exists' => true,
585	'visited_posts' => $visited_posts,
586	'expiration' => empty( $expirations ) ? 0 : max( $expirations )
587	];
588	}
589	}
590
591	/**
592	* Sanitize storage data.
593	*
594	* @param string $storage_data
595	*
596	* @return array
597	*/
598	public function sanitize_storage_data( $storage_data ) {
599	try {
600	// strip slashes
601	$storage_data = stripslashes( $storage_data );
602
603	// decode storage data
604	$storage_data = json_decode( $storage_data, true, 2 );
605	} finally {
606	// valid data?
607	if ( json_last_error() === JSON_ERROR_NONE && is_array( $storage_data ) && ! empty( $storage_data ) ) {
608	$content_data = [];
609
610	foreach ( $storage_data as $content_id => $content_expiration ) {
611	$content_data[(int) $content_id] = (int) $content_expiration;
612	}
613
614	return array_unique( $content_data, SORT_NUMERIC );
615	} else
616	return [];
617	}
618	}
619
620	/**
621	* Sanitize cookies.
622	*
623	* @param string $storage_data
624	*
625	* @return array
626	*/
627	public function sanitize_cookies_data( $storage_data ) {
628	$content_data = $expirations = [];
629
630	// is cookie valid?
631	if ( preg_match( '/^(([0-9]+b[0-9]+a?)+)$/', $storage_data ) === 1 ) {
632	// get single id with expiration
633	$expiration_ids = explode( 'a', $storage_data );
634
635	// check every expiration => id pair
636	foreach ( $expiration_ids as $pair ) {
637	$pair = explode( 'b', $pair );
638	$expirations[] = (int) $pair[0];
639	$content_data[(int) $pair[1]] = (int) $pair[0];
640	}
641	}
642
643	return [
644	'visited' => array_unique( $content_data, SORT_NUMERIC ),
645	'expiration' => empty( $expirations ) ? 0 : max( $expirations )
646	];
647	}
648
649	/**
650	* Save data storage.
651	*
652	* @param int $content
653	* @param string $content_type
654	* @param array $content_data
655	*
656	* @return bool
657	*/
658	private function save_data_storage( $content, $content_type, $content_data ) {
659	// get base instance
660	$pvc = Post_Views_Counter();
661
662	// set default flag
663	$count_visit = true;
664
665	// get expiration
666	$expiration = $this->get_timestamp( $pvc->options['general']['time_between_counts']['type'], $pvc->options['general']['time_between_counts']['number'] );
667
668	// is this a new cookie?
669	if ( empty( $content_data ) ) {
670	$storage = [
671	$content => $expiration
672	];
673	} else {
674	// get current gmt time
675	$current_time = current_time( 'timestamp', true );
676
677	// post already viewed but not expired?
678	if ( in_array( $content, array_keys( $content_data ), true ) && $current_time < $content_data[$content] )
679	$count_visit = false;
680
681	// create copy for better foreach performance
682	$content_data_tmp = $content_data;
683
684	// check whether viewed id has expired - no need to keep it anymore
685	foreach ( $content_data_tmp as $content_id => $content_expiration ) {
686	if ( $current_time > $content_expiration )
687	unset( $content_data[$content_id] );
688	}
689
690	// add new id or change expiration date if id already exists
691	if ( $count_visit )
692	$content_data[$content] = $expiration;
693
694	$storage = $content_data;
695	}
696
697	$this->storage[$content_type] = $storage;
698
699	return $count_visit;
700	}
701
702	/**
703	* Save cookie storage.
704	*
705	* @param int $content
706	* @param array $content_data
707	*
708	* @return bool
709	*/
710	private function save_cookie_storage( $content, $content_data ) {
711	// early return?
712	//TODO check this filter in js
713	// if ( apply_filters( 'pvc_maybe_set_cookie', true, $content, $content_type, $content_data ) !== true )
714	// return;
715
716	// get base instance
717	$pvc = Post_Views_Counter();
718
719	// set default flag
720	$count_visit = true;
721
722	// get expiration
723	$expiration = $this->get_timestamp( $pvc->options['general']['time_between_counts']['type'], $pvc->options['general']['time_between_counts']['number'] );
724
725	// assign cookie name
726	$cookie_name = 'pvc_visits' . ( is_multisite() ? '_' . get_current_blog_id() : '' );
727
728	$cookies_data = [
729	'name' => [],
730	'value' => [],
731	'expiry' => []
732	];
733
734	// is this a new cookie?
735	if ( empty( $content_data['visited'] ) ) {
736	$cookies_data['name'][] = $cookie_name . '[0]';
737	$cookies_data['value'][] = $expiration . 'b' . $content;
738	$cookies_data['expiry'][] = $expiration;
739	} else {
740	// get current gmt time
741	$current_time = current_time( 'timestamp', true );
742
743	if ( in_array( $content, array_keys( $content_data['visited'] ), true ) && $current_time < $content_data['visited'][$content] ) {
744	$count_visit = false;
745	} else {
746	// add new id or change expiration date if id already exists
747	$content_data['visited'][$content] = $expiration;
748	}
749
750	// create copy for better foreach performance
751	$visited_expirations = $content_data['visited'];
752
753	// check whether viewed id has expired - no need to keep it in cookie (less size)
754	foreach ( $visited_expirations as $content_id => $content_expiration ) {
755	if ( $current_time > $content_expiration )
756	unset( $content_data['visited'][$content_id] );
757	}
758
759	// set new last expiration date if needed
760	$content_data['expiration'] = empty( $content_data['visited'] ) ? 0 : max( $content_data['visited'] );
761
762	$cookies = $imploded = [];
763
764	// create pairs
765	foreach ( $content_data['visited'] as $id => $exp ) {
766	$imploded[] = $exp . 'b' . $id;
767	}
768
769	// split cookie into chunks (3980 bytes to make sure it is safe for every browser)
770	$chunks = str_split( implode( 'a', $imploded ), 3980 );
771
772	// more then one chunk?
773	if ( count( $chunks ) > 1 ) {
774	$last_id = '';
775
776	foreach ( $chunks as $chunk_id => $chunk ) {
777	// new chunk
778	$chunk_c = $last_id . $chunk;
779
780	// is it full-length chunk?
781	if ( strlen( $chunk ) === 3980 ) {
782	// get last part
783	$last_part = strrchr( $chunk_c, 'a' );
784
785	// get last id
786	$last_id = substr( $last_part, 1 );
787
788	// add new full-lenght chunk
789	$cookies[$chunk_id] = substr( $chunk_c, 0, strlen( $chunk_c ) - strlen( $last_part ) );
790	} else {
791	// add last chunk
792	$cookies[$chunk_id] = $chunk_c;
793	}
794	}
795	} else {
796	// only one chunk
797	$cookies[] = $chunks[0];
798	}
799
800	foreach ( $cookies as $key => $value ) {
801	$cookies_data['name'][] = $cookie_name . '[' . $key . ']';
802	$cookies_data['value'][] = $value;
803	$cookies_data['expiry'][] = $content_data['expiration'];
804	}
805	}
806
807	$this->storage = $cookies_data;
808
809	return $count_visit;
810	}
811
812	/**
813	* Save cookie function.
814	*
815	* @param int $id
816	* @param array $cookie
817	*
818	* @return bool\|void
819	*/
820	private function save_cookie( $id, $cookie = [] ) {
821	// early return?
822	if ( apply_filters( 'pvc_maybe_set_cookie', true, $id, 'post', $cookie ) !== true )
823	return;
824
825	// get main instance
826	$pvc = Post_Views_Counter();
827
828	// set default flag
829	$count_visit = true;
830
831	// get expiration
832	$expiration = $this->get_timestamp( $pvc->options['general']['time_between_counts']['type'], $pvc->options['general']['time_between_counts']['number'] );
833
834	// assign cookie name
835	$cookie_name = 'pvc_visits' . ( is_multisite() ? '_' . get_current_blog_id() : '' );
836
837	// check whether php version is at least 7.3
838	$php_at_least_73 = version_compare( phpversion(), '7.3', '>=' );
839
840	// is this a new cookie?
841	if ( empty( $cookie ) ) {
842	if ( $php_at_least_73 ) {
843	// set cookie
844	setcookie(
845	$cookie_name . '[0]',
846	$expiration . 'b' . $id,
847	[
848	'expires' => $expiration,
849	'path' => COOKIEPATH,
850	'domain' => COOKIE_DOMAIN,
851	'secure' => is_ssl(),
852	'httponly' => false,
853	'samesite' => 'LAX'
854	]
855	);
856	} else {
857	// set cookie
858	setcookie( $cookie_name . '[0]', $expiration . 'b' . $id, $expiration, COOKIEPATH, COOKIE_DOMAIN, is_ssl(), false );
859	}
860
861	if ( $this->queue_mode )
862	$this->check_cookie( [ 0 => $expiration . 'b' . $id ] );
863	} else {
864	// get current gmt time
865	$current_time = current_time( 'timestamp', true );
866
867	// post already viewed but not expired?
868	if ( in_array( $id, array_keys( $cookie['visited_posts'] ), true ) && $current_time < $cookie['visited_posts'][$id] )
869	$count_visit = false;
870	else {
871	// add new id or change expiration date if id already exists
872	$cookie['visited_posts'][$id] = $expiration;
873	}
874
875	// create copy for better foreach performance
876	$visited_posts_expirations = $cookie['visited_posts'];
877
878	// check whether viewed id has expired - no need to keep it in cookie (less size)
879	foreach ( $visited_posts_expirations as $post_id => $post_expiration ) {
880	if ( $current_time > $post_expiration )
881	unset( $cookie['visited_posts'][$post_id] );
882	}
883
884	// set new last expiration date if needed
885	$cookie['expiration'] = empty( $cookie['visited_posts'] ) ? 0 : max( $cookie['visited_posts'] );
886
887	$cookies = $imploded = [];
888
889	// create pairs
890	foreach ( $cookie['visited_posts'] as $id => $exp ) {
891	$imploded[] = $exp . 'b' . $id;
892	}
893
894	// split cookie into chunks (3980 bytes to make sure it is safe for every browser)
895	$chunks = str_split( implode( 'a', $imploded ), 3980 );
896
897	// more then one chunk?
898	if ( count( $chunks ) > 1 ) {
899	$last_id = '';
900
901	foreach ( $chunks as $chunk_id => $chunk ) {
902	// new chunk
903	$chunk_c = $last_id . $chunk;
904
905	// is it full-length chunk?
906	if ( strlen( $chunk ) === 3980 ) {
907	// get last part
908	$last_part = strrchr( $chunk_c, 'a' );
909
910	// get last id
911	$last_id = substr( $last_part, 1 );
912
913	// add new full-lenght chunk
914	$cookies[$chunk_id] = substr( $chunk_c, 0, strlen( $chunk_c ) - strlen( $last_part ) );
915	} else {
916	// add last chunk
917	$cookies[$chunk_id] = $chunk_c;
918	}
919	}
920	} else {
921	// only one chunk
922	$cookies[] = $chunks[0];
923	}
924
925	foreach ( $cookies as $key => $value ) {
926	if ( $php_at_least_73 ) {
927	// set cookie
928	setcookie(
929	$cookie_name . '[' . $key . ']',
930	$value,
931	[
932	'expires' => $cookie['expiration'],
933	'path' => COOKIEPATH,
934	'domain' => COOKIE_DOMAIN,
935	'secure' => is_ssl(),
936	'httponly' => false,
937	'samesite' => 'LAX'
938	]
939	);
940	} else {
941	// set cookie
942	setcookie( $cookie_name . '[' . $key . ']', $value, $cookie['expiration'], COOKIEPATH, COOKIE_DOMAIN, is_ssl(), false );
943	}
944	}
945
946	if ( $this->queue_mode )
947	$this->check_cookie( $cookies );
948	}
949
950	return $count_visit;
951	}
952
953	/**
954	* Count visit.
955	*
956	* @param int $post_id
957	*
958	* @return int\|null
959	*/
960	private function count_visit( $post_id ) {
961	// increment amount
962	$increment_amount = (int) apply_filters( 'pvc_views_increment_amount', 1, $post_id, 'post' );
963
964	if ( $increment_amount < 1 )
965	$increment_amount = 1;
966
967	// get day, week, month and year
968	$date = explode( '-', date( 'W-d-m-Y-o', current_time( 'timestamp', Post_Views_Counter()->options['general']['count_time'] === 'gmt' ) ) );
969
970	// prepare count data
971	$count_data = [
972	'content_id' => $post_id,
973	'content_type' => 'post',
974	'increment' => $increment_amount,
975	'visits' => [
976	0 => $date[3] . $date[2] . $date[1], // day like 20140324
977	1 => $date[4] . $date[0], // week like 201439
978	2 => $date[3] . $date[2], // month like 201405
979	3 => $date[3], // year like 2014
980	4 => 'total' // total views
981	]
982	];
983
984	// attempt to count the visit and check for success
985	if ( call_user_func( apply_filters( 'pvc_count_visit_multi', [ $this, 'count_visit_multi' ] ), $count_data ) ) {
986	do_action( 'pvc_after_count_visit', $post_id, 'post' );
987
988	return $post_id;
989	}
990
991	// return null on failure to indicate the count did not succeed
992	return null;
993	}
994
995	/**
996	* Prepare values to be inserted into database.
997	*
998	* @param array $data
999	*
1000	* @return bool
1001	*/
1002	public function count_visit_multi( $data ) {
1003	// no count data?
1004	if ( empty( $data ) )
1005	return false;
1006
1007	$success = true;
1008
1009	foreach ( $data['visits'] as $type => $period ) {
1010	// hit the database directly and check for failure
1011	if ( ! $this->db_insert( $data['content_id'], $type, $period, $data['increment'] ) )
1012	$success = false;
1013	}
1014
1015	return $success;
1016	}
1017
1018	/**
1019	* Remove post views from database when post is deleted.
1020	*
1021	* @global object $wpdb
1022	*
1023	* @param int $post_id
1024	*
1025	* @return void
1026	*/
1027	public function delete_post_views( $post_id ) {
1028	global $wpdb;
1029
1030	$data = [
1031	'where' => [ 'id' => $post_id ],
1032	'format' => [ '%d' ]
1033	];
1034
1035	$data = apply_filters( 'pvc_delete_post_views_where_clause', $data, $post_id );
1036
1037	$wpdb->delete( $wpdb->prefix . 'post_views', $data['where'], $data['format'] );
1038	}
1039
1040	/**
1041	* Get timestamp convertion.
1042	*
1043	* @param string $type
1044	* @param int $number
1045	* @param bool $timestamp
1046	*
1047	* @return int
1048	*/
1049	public function get_timestamp( $type, $number, $timestamp = true ) {
1050	$converter = [
1051	'minutes' => MINUTE_IN_SECONDS,
1052	'hours' => HOUR_IN_SECONDS,
1053	'days' => DAY_IN_SECONDS,
1054	'weeks' => WEEK_IN_SECONDS,
1055	'months' => MONTH_IN_SECONDS,
1056	'years' => YEAR_IN_SECONDS
1057	];
1058
1059	return (int) ( ( $timestamp ? current_time( 'timestamp', true ) : 0 ) + $number * $converter[$type] );
1060	}
1061
1062	/**
1063	* Check if object cache is in use.
1064	*
1065	* @param bool $only_interval
1066	*
1067	* @return bool
1068	*/
1069	public function using_object_cache( $only_interval = false ) {
1070	$using = wp_using_ext_object_cache();
1071
1072	// is object cache active?
1073	if ( $using ) {
1074	// get main instance
1075	$pvc = Post_Views_Counter();
1076
1077	// check object cache
1078	if ( ! $only_interval && ! $pvc->options['general']['object_cache'] )
1079	$using = false;
1080
1081	// check interval
1082	if ( $pvc->options['general']['flush_interval']['number'] <= 0 )
1083	$using = false;
1084	}
1085
1086	return $using;
1087	}
1088
1089	/**
1090	* Flush views data stored in the persistent object cache into
1091	* our custom table and clear the object cache keys when done.
1092	*
1093	* @return bool
1094	*/
1095	public function flush_cache_to_db() {
1096	// get keys
1097	$key_names = wp_cache_get( 'cached_key_names', 'pvc' );
1098
1099	if ( ! $key_names )
1100	$key_names = [];
1101	else {
1102	// create an array out of a string that's stored in the cache
1103	$key_names = explode( '\|', $key_names );
1104	}
1105
1106	// any data?
1107	if ( ! empty( $key_names ) ) {
1108	foreach ( $key_names as $key_name ) {
1109	// get values stored within the key name itself
1110	list( $id, $type, $period ) = explode( '.', $key_name );
1111
1112	// get the cached count value
1113	$count = wp_cache_get( $key_name, 'pvc' );
1114
1115	// store cached value in the database
1116	$this->db_prepare_insert( $id, $type, $period, $count );
1117
1118	// clear the cache key we just flushed
1119	wp_cache_delete( $key_name, 'pvc' );
1120	}
1121
1122	// flush values to database
1123	$this->db_commit_insert();
1124
1125	// delete the key holding the list
1126	wp_cache_delete( 'cached_key_names', 'pvc' );
1127	}
1128
1129	// remove last flush
1130	wp_cache_delete( 'last-flush', 'pvc' );
1131
1132	return true;
1133	}
1134
1135	/**
1136	* Insert or update views count.
1137	*
1138	* @global object $wpdb
1139	*
1140	* @param int $id
1141	* @param int $type
1142	* @param string $period
1143	* @param int $count
1144	*
1145	* @return bool
1146	*/
1147	private function db_insert( $id, $type, $period, $count ) {
1148	global $wpdb;
1149
1150	// skip single query?
1151	if ( (bool) apply_filters( 'pvc_skip_single_query', false, $id, $type, $period, $count, 'post' ) )
1152	return true; // consider skipped as "successful" for this context
1153
1154	$result = $wpdb->query( $wpdb->prepare( 'INSERT INTO ' . $wpdb->prefix . 'post_views (`id`, `type`, `period`, `count`) VALUES (%d, %d, %s, %d) ON DUPLICATE KEY UPDATE count = count + %d', $id, $type, $period, $count, $count ) );
1155
1156	// check for query failure
1157	if ( $result === false ) {
1158	// log the error for debugging
1159	error_log( sprintf( 'Post Views Counter: Failed to insert/update views for ID %d, type %d, period %s. MySQL error: %s', $id, $type, $period, $wpdb->last_error ) );
1160	return false;
1161	}
1162
1163	return true;
1164	}
1165
1166	/**
1167	* Prepare bulk insert or update views count.
1168	*
1169	* @param int $id
1170	* @param int $type
1171	* @param string $period
1172	* @param int $count
1173	*
1174	* @return void
1175	*/
1176	private function db_prepare_insert( $id, $type, $period, $count = 1 ) {
1177	// cast count
1178	$count = (int) $count;
1179
1180	if ( ! $count )
1181	$count = 1;
1182
1183	// any queries?
1184	if ( ! empty( $this->db_insert_values ) )
1185	$this->db_insert_values .= ', ';
1186
1187	// append insert queries
1188	$this->db_insert_values .= sprintf( '(%d, %d, "%s", %d)', $id, $type, $period, $count );
1189
1190	if ( strlen( $this->db_insert_values ) > 25000 )
1191	$this->db_commit_insert();
1192	}
1193
1194	/**
1195	* Insert accumulated values to database.
1196	*
1197	* @global object $wpdb
1198	*
1199	* @return int\|bool
1200	*/
1201	private function db_commit_insert() {
1202	global $wpdb;
1203
1204	if ( empty( $this->db_insert_values ) )
1205	return false;
1206
1207	$result = $wpdb->query(
1208	"INSERT INTO " . $wpdb->prefix . "post_views (id, type, period, count)
1209	VALUES " . $this->db_insert_values . "
1210	ON DUPLICATE KEY UPDATE count = count + VALUES(count)"
1211	);
1212
1213	$this->db_insert_values = '';
1214
1215	return $result;
1216	}
1217
1218	/**
1219	* Check whether user has excluded roles.
1220	*
1221	* @param int $user_id
1222	* @param array $option
1223	*
1224	* @return bool
1225	*/
1226	public function is_user_role_excluded( $user_id, $option = [] ) {
1227	// get user by ID
1228	$user = get_user_by( 'id', $user_id );
1229
1230	// no user?
1231	if ( empty( $user ) )
1232	return false;
1233
1234	// get user roles
1235	$roles = (array) $user->roles;
1236
1237	// any roles?
1238	if ( ! empty( $roles ) ) {
1239	foreach ( $roles as $role ) {
1240	if ( in_array( $role, $option, true ) )
1241	return true;
1242	}
1243	}
1244
1245	return false;
1246	}
1247
1248	/**
1249	* Check if IPv4 is in range.
1250	*
1251	* @param string $ip
1252	* @param string $range
1253	*
1254	* @return bool
1255	*/
1256	public function ipv4_in_range( $ip, $range ) {
1257	$start = str_replace( '*', '0', $range );
1258	$end = str_replace( '*', '255', $range );
1259	$ip = (float) sprintf( "%u", ip2long( $ip ) );
1260
1261	return ( $ip >= (float) sprintf( "%u", ip2long( $start ) ) && $ip <= (float) sprintf( "%u", ip2long( $end ) ) );
1262	}
1263
1264	/**
1265	* Get user real IP address.
1266	*
1267	* @return string
1268	*/
1269	public function get_user_ip() {
1270	$ip = isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : '';
1271
1272	foreach ( [ 'HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_X_CLUSTER_CLIENT_IP', 'HTTP_FORWARDED_FOR', 'HTTP_FORWARDED', 'REMOTE_ADDR' ] as $key ) {
1273	if ( array_key_exists( $key, $_SERVER ) === true ) {
1274	foreach ( explode( ',', $_SERVER[$key] ) as $ip ) {
1275	// trim for safety measures
1276	$ip = trim( $ip );
1277
1278	// attempt to validate IP
1279	if ( $this->validate_user_ip( $ip ) )
1280	continue;
1281	}
1282	}
1283	}
1284
1285	return (string) $ip;
1286	}
1287
1288	/**
1289	* Ensure an IP address is both a valid IP and does not fall within a private network range.
1290	*
1291	* @param string $ip
1292	*
1293	* @return bool
1294	*/
1295	public function validate_user_ip( $ip ) {
1296	if ( filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 \| FILTER_FLAG_NO_PRIV_RANGE \| FILTER_FLAG_NO_RES_RANGE ) === false )
1297	return false;
1298
1299	return true;
1300	}
1301
1302	/**
1303	* Register REST API endpoints.
1304	*
1305	* @return void
1306	*/
1307	public function rest_api_init() {
1308	// view post route
1309	register_rest_route(
1310	'post-views-counter',
1311	'/view-post/(?P<id>\d+)\|/view-post/',
1312	[
1313	'methods' => [ 'POST' ],
1314	'callback' => [ $this, 'check_post_rest_api' ],
1315	'permission_callback' => [ $this, 'view_post_permissions_check' ],
1316	'args' => apply_filters( 'pvc_rest_api_view_post_args', [
1317	'id' => [
1318	'default' => 0,
1319	'sanitize_callback' => 'absint'
1320	],
1321	'storage_type' => [
1322	'default' => 'cookies'
1323	],
1324	'storage_data' => [
1325	'default' => ''
1326	]
1327	] )
1328	]
1329	);
1330
1331	// get views route
1332	register_rest_route(
1333	'post-views-counter',
1334	'/get-post-views/(?P<id>(\d+,?)+)',
1335	[
1336	'methods' => [ 'GET', 'POST' ],
1337	'callback' => [ $this, 'get_post_views_rest_api' ],
1338	'permission_callback' => [ $this, 'get_post_views_permissions_check' ],
1339	'args' => apply_filters( 'pvc_rest_api_get_post_views_args', [
1340	'id' => [
1341	'default' => 0,
1342	'sanitize_callback' => [ $this, 'validate_rest_api_data' ]
1343	]
1344	] )
1345	]
1346	);
1347	}
1348
1349	/**
1350	* Get post views via REST API request.
1351	*
1352	* @param object $request
1353	*
1354	* @return int
1355	*/
1356	public function get_post_views_rest_api( $request ) {
1357	return pvc_get_post_views( $request->get_param( 'id' ) );
1358	}
1359
1360	/**
1361	* Check if a given request has access to get views.
1362	*
1363	* @param object $request
1364	*
1365	* @return bool
1366	*/
1367	public function get_post_views_permissions_check( $request ) {
1368	return (bool) apply_filters( 'pvc_rest_api_get_post_views_check', true, $request );
1369	}
1370
1371	/**
1372	* Check if a given request has access to view post.
1373	*
1374	* @param object $request
1375	*
1376	* @return bool
1377	*/
1378	public function view_post_permissions_check( $request ) {
1379	return (bool) apply_filters( 'pvc_rest_api_view_post_check', true, $request );
1380	}
1381
1382	/**
1383	* Validate REST API incoming data.
1384	*
1385	* @param int\|array\|string $data
1386	*
1387	* @return int\|array
1388	*/
1389	public function validate_rest_api_data( $data ) {
1390	// POST array?
1391	if ( is_array( $data ) )
1392	$data = array_unique( array_filter( array_map( 'absint', $data ) ), SORT_NUMERIC );
1393	// multiple comma-separated values?
1394	elseif ( strpos( $data, ',' ) !== false ) {
1395	$data = explode( ',', $data );
1396
1397	if ( is_array( $data ) && ! empty( $data ) )
1398	$data = array_unique( array_filter( array_map( 'absint', $data ) ), SORT_NUMERIC );
1399	else
1400	$data = [];
1401	// single value?
1402	} else
1403	$data = absint( $data );
1404
1405	return $data;
1406	}
1407	}
1408