statify / inc / statify_frontend.class.php

statify_frontend.class.php in Statify 1.4.1, at inc/statify_frontend.class.php

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1	<?php
2
3
4	/* Quit */
5	defined('ABSPATH') OR exit;
6
7
8	/**
9	* Statify_Frontend
10	*
11	* @since 1.4.0
12	*/
13
14	class Statify_Frontend extends Statify
15	{
16
17
18	/**
19	* Track the page view
20	*
21	* @since 0.1.0
22	* @change 1.4.1
23	*/
24
25	public static function track_visit()
26	{
27	/* Init vars */
28	$use_snippet = self::$_options['snippet'];
29	$is_snippet = $use_snippet && get_query_var('statify_target');
30
31	/* Skip tracking */
32	if ( self::_skip_tracking() ) {
33	return self::_jump_out($is_snippet);
34	}
35
36	/* Set target & referrer */
37	if ( $is_snippet ) {
38	$target = urldecode( get_query_var('statify_target') );
39	$referrer = urldecode( get_query_var('statify_referrer') );
40	} else if ( ! $use_snippet) {
41	$target = ( filter_has_var(INPUT_SERVER, 'REQUEST_URI') ? wp_unslash($_SERVER['REQUEST_URI']) : '/' );
42	$referrer = ( filter_has_var(INPUT_SERVER, 'HTTP_REFERER') ? wp_unslash($_SERVER['HTTP_REFERER']) : '' );
43	} else {
44	return;
45	}
46
47	/* Invalid target? */
48	if ( empty($target) OR ! wp_validate_redirect($target, false) ) {
49	return self::_jump_out($is_snippet);
50	}
51
52	/* Global vars */
53	global $wpdb, $wp_rewrite;
54
55	/* Init rows */
56	$data = array(
57	'created' => '',
58	'referrer' => '',
59	'target' => ''
60	);
61
62	/* Set request timestamp */
63	$data['created'] = strftime(
64	'%Y-%m-%d',
65	current_time('timestamp')
66	);
67
68	/* Sanitize referrer url */
69	if ( ! empty($referrer) && strpos( $referrer, home_url() ) === false ) {
70	$data['referrer'] = esc_url_raw( $referrer, array('http', 'https') );
71	}
72
73	/* Relative target url */
74	$data['target'] = home_url($target, 'relative');
75
76	/* Trim target url */
77	if ( $wp_rewrite->permalink_structure ) {
78	$data['target'] = parse_url($data['target'], PHP_URL_PATH);
79	}
80
81	/* Sanitize target url */
82	$data['target'] = esc_url_raw($data['target']);
83
84	/* Insert */
85	$wpdb->insert(
86	$wpdb->statify,
87	$data
88	);
89
90	/* Jump! */
91	return self::_jump_out($is_snippet);
92	}
93
94
95	/**
96	* Rules to skip the tracking
97	*
98	* @since 1.2.6
99	* @change 1.4.1
100	*
101	* @hook boolean statify_skip_tracking (https://gist.github.com/sergejmueller/7612368)
102	*
103	* @return boolean $skip_hook TRUE if NO tracking is desired
104	*/
105
106	private static function _skip_tracking() {
107	/* Skip tracking via Hook */
108	if ( ( $skip_hook = apply_filters('statify_skip_tracking', NULL) ) !== NULL ) {
109	return $skip_hook;
110	}
111
112	/* Skip tracking via User Agent */
113	if ( ! filter_has_var(INPUT_SERVER, 'HTTP_USER_AGENT') OR ! preg_match('/(?:Windows\|Macintosh\|Linux\|iPhone\|iPad)/', $_SERVER['HTTP_USER_AGENT']) ) {
114	return true;
115	}
116
117	/* Skip tracking via Conditional_Tags */
118	return ( is_feed() OR is_trackback() OR is_robots() OR is_preview() OR is_user_logged_in() OR is_404() OR is_search() );
119	}
120
121
122	/**
123	* Send JavaScript headers or return false
124	*
125	* @since 1.1.0
126	* @change 1.3.1
127	*
128	* @param boolean $is_snippet Snippet type
129	* @return mixed Exit or return depending on snippet type
130	*/
131
132	private static function _jump_out($is_snippet) {
133	if ( $is_snippet ) {
134	nocache_headers();
135	header('Content-type: text/javascript', true, 204);
136	exit;
137	}
138
139	return false;
140	}
141
142
143	/**
144	* Declare GET variables for further use
145	*
146	* @since 1.1.0
147	* @change 1.3.1
148	*
149	* @param array $vars Input with existing variables
150	* @return array $vars Output with plugin variables
151	*/
152
153	public static function query_vars($vars) {
154	$vars[] = 'statify_referrer';
155	$vars[] = 'statify_target';
156
157	return $vars;
158	}
159
160
161	/**
162	* Print JavaScript snippet
163	*
164	* @since 1.1.0
165	* @change 1.4.1
166	*/
167
168	public static function wp_footer()
169	{
170	/* Skip by option */
171	if ( ! self::$_options['snippet'] ) {
172	return;
173	}
174
175	/* Skip by rules */
176	if ( self::_skip_tracking() ) {
177	return;
178	}
179
180	/* Load template */
181	load_template(
182	wp_normalize_path(
183	sprintf(
184	'%s/views/js_snippet.view.php',
185	STATIFY_DIR
186	)
187	)
188	);
189	}
190	}