autoptimize / classes / autoptimizeScripts.php

autoptimizeScripts.php in Autoptimize 0.4, at classes/autoptimizeScripts.php

163 lines 3.6 KB

Raw Download Zip

1	<?php
2
3	class autoptimizeScripts extends autoptimizeBase
4	{
5	private $scripts = array();
6	private $dontmove = array('document.write','google_ad_client','show_ads.js');
7	private $domove = array('gaJsHost');
8	private $jscode = '';
9	private $url = '';
10	private $move = array();
11
12	//Reads the page and collects script tags
13	public function read()
14	{
15	//Get script files
16	if(preg_match_all('#<script.*</script>#Usmi',$this->content,$matches))
17	{
18	foreach($matches[0] as $tag)
19	{
20	if(preg_match('#src=("\|\')(.*)("\|\')#Usmi',$tag,$source))
21	{
22	//External script
23	$url = current(explode('?',$source[2],2));
24	$path = $this->getpath($url);
25	if($path !==false && preg_match('#\.js$#',$path))
26	{
27	//Good script
28	$this->scripts[] = $path;
29	}else{
30	//External script (example: google analytics)
31	//OR Script is dynamic (.php etc)
32	if($this->ismovable($tag))
33	{
34	$this->move[] = $tag;
35	}else{
36	//We shouldn't touch this
37	$tag = '';
38	}
39	}
40	}else{
41	//Inline script
42	if($this->ismergeable($tag))
43	{
44	preg_match('#<script.>(.)</script>#Usmi',$tag,$code);
45	$code = preg_replace('#.<!\[CDATA\[(?:\s\/)?(.)(?://\|/\)\s?\]\]>.*#sm','$1',$code[1]);
46	$code = preg_replace('/(?:^\\s<!--\\s\|\\s(?:\\/\\/)?\\s-->\\s*$)/','',$code);
47	$this->scripts[] = 'INLINE;'.$code;
48	}else{
49	//Can we move this?
50	if($this->ismovable($tag))
51	{
52	$this->move[] = $tag;
53	}else{
54	//We shouldn't touch this
55	$tag = '';
56	}
57	}
58	}
59
60	//Remove the original script tag
61	$this->content = str_replace($tag,'',$this->content);
62	}
63
64	return true;
65	}
66
67	//No script files :(
68	return false;
69	}
70
71	//Joins and optimizes JS
72	public function minify()
73	{
74	foreach($this->scripts as $script)
75	{
76	if(preg_match('#^INLINE;#',$script))
77	{
78	//Inline script
79	$script = preg_replace('#^INLINE;#','',$script);
80	$this->jscode .= "\n".$script;
81	}else{
82	//External script
83	if($script !== false && file_exists($script) && is_readable($script))
84	{
85	$script = file_get_contents($script);
86	$this->jscode .= "\n".$script;
87	}/*else{
88	//Couldn't read JS. Maybe getpath isn't working?
89	}*/
90	}
91	}
92
93	//$this->jscode has all the uncompressed code now.
94	if(class_exists('JSMin'))
95	{
96	$this->jscode = trim(JSMin::minify($this->jscode));
97	return true;
98	}
99
100	return false;
101	}
102
103	//Caches the JS in uncompressed, deflated and gzipped form.
104	public function cache()
105	{
106	$md5 = md5($this->jscode);
107	$cache = new autopimizeCache(WP_PLUGIN_DIR.'/autoptimize/cache/',$md5);
108	if(!$cache->check())
109	{
110	//Cache our code
111	$cache->cache($this->jscode,'text/javascript');
112	}
113	$this->url = WP_PLUGIN_URL.'/autoptimize/cache/'.$cache->getname();
114	}
115
116	//Returns the content
117	public function getcontent()
118	{
119	$bodyreplacement = implode('',$this->move).'<script type="text/javascript" src="'.$this->url.'"></script></body>';
120	$this->content = str_replace('</body>',$bodyreplacement,$this->content);
121	return $this->content;
122	}
123
124	//Checks agains the whitelist
125	private function ismergeable($tag)
126	{
127	foreach($this->domove as $match)
128	{
129	if(strpos($tag,$match)!==false)
130	{
131	//Matched something
132	return false;
133	}
134	}
135
136	//If we're here it's safe to merge
137	return true;
138	}
139
140	//Checks agains the blacklist
141	private function ismovable($tag)
142	{
143	$allowed = !$this->ismergeable($tag);
144
145	if($allowed == true)
146	{
147	return true;
148	}
149
150	foreach($this->dontmove as $match)
151	{
152	if(strpos($tag,$match)!==false)
153	{
154	//Matched something
155	return false;
156	}
157	}
158
159	//If we're here it's safe to move
160	return true;
161	}
162	}
163