autoptimize / classes / autoptimizeScripts.php

autoptimizeScripts.php in Autoptimize 0.6, at classes/autoptimizeScripts.php

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1	<?php
2
3	class autoptimizeScripts extends autoptimizeBase
4	{
5	private $scripts = array();
6	private $dontmove = array('document.write','show_ads.js','google_ad','blogcatalog.com/w','tweetmeme.com/i','mybloglog.com/');
7	private $domove = array('gaJsHost');
8	private $domovelast = array('addthis.com','/afsonline/show_afs_search.js');
9	private $jscode = '';
10	private $url = '';
11	private $move = array('first' => array(), 'last' => array());
12	private $restofcontent = '';
13
14	//Reads the page and collects script tags
15	public function read($justhead)
16	{
17	//Remove everything that's not the header
18	if($justhead == true)
19	{
20	$content = explode('</head>',$this->content,2);
21	$this->content = $content[0].'</head>';
22	$this->restofcontent = $content[1];
23	}
24
25	//Get script files
26	if(preg_match_all('#<script.*</script>#Usmi',$this->content,$matches))
27	{
28	foreach($matches[0] as $tag)
29	{
30	if(preg_match('#src=("\|\')(.*)("\|\')#Usmi',$tag,$source))
31	{
32	//External script
33	$url = current(explode('?',$source[2],2));
34	$path = $this->getpath($url);
35	if($path !==false && preg_match('#\.js$#',$path))
36	{
37	//Good script
38	$this->scripts[] = $path;
39	}else{
40	//External script (example: google analytics)
41	//OR Script is dynamic (.php etc)
42	if($this->ismovable($tag))
43	{
44	if($this->movetolast($tag))
45	{
46	$this->move['last'][] = $tag;
47	}else{
48	$this->move['first'][] = $tag;
49	}
50	}else{
51	//We shouldn't touch this
52	$tag = '';
53	}
54	}
55	}else{
56	//Inline script
57	if($this->ismergeable($tag))
58	{
59	preg_match('#<script.>(.)</script>#Usmi',$tag,$code);
60	$code = preg_replace('#.<!\[CDATA\[(?:\s\/)?(.)(?://\|/\)\s?\]\]>.*#sm','$1',$code[1]);
61	$code = preg_replace('/(?:^\\s<!--\\s\|\\s(?:\\/\\/)?\\s-->\\s*$)/','',$code);
62	$this->scripts[] = 'INLINE;'.$code;
63	}else{
64	//Can we move this?
65	if($this->ismovable($tag))
66	{
67	$this->move[] = $tag;
68	}else{
69	//We shouldn't touch this
70	$tag = '';
71	}
72	}
73	}
74
75	//Remove the original script tag
76	$this->content = str_replace($tag,'',$this->content);
77	}
78
79	return true;
80	}
81
82	//No script files :(
83	return false;
84	}
85
86	//Joins and optimizes JS
87	public function minify()
88	{
89	foreach($this->scripts as $script)
90	{
91	if(preg_match('#^INLINE;#',$script))
92	{
93	//Inline script
94	$script = preg_replace('#^INLINE;#','',$script);
95	$this->jscode .= "\n".$script;
96	}else{
97	//External script
98	if($script !== false && file_exists($script) && is_readable($script))
99	{
100	$script = file_get_contents($script);
101	$this->jscode .= "\n".$script;
102	}/*else{
103	//Couldn't read JS. Maybe getpath isn't working?
104	}*/
105	}
106	}
107
108	//$this->jscode has all the uncompressed code now.
109	if(class_exists('JSMin'))
110	{
111	$this->jscode = trim(JSMin::minify($this->jscode));
112	return true;
113	}
114
115	return false;
116	}
117
118	//Caches the JS in uncompressed, deflated and gzipped form.
119	public function cache()
120	{
121	$md5 = md5($this->jscode);
122	$cache = new autopimizeCache(WP_PLUGIN_DIR.'/autoptimize/cache/',$md5);
123	if(!$cache->check())
124	{
125	//Cache our code
126	$cache->cache($this->jscode,'text/javascript');
127	}
128	$this->url = WP_PLUGIN_URL.'/autoptimize/cache/'.$cache->getname();
129	}
130
131	//Returns the content
132	public function getcontent()
133	{
134	//Restore the full content
135	if(!empty($this->restofcontent))
136	{
137	$this->content .= $this->restofcontent;
138	$this->restofcontent = '';
139	}
140
141	//Add the scripts
142	$bodyreplacement = implode('',$this->move['first']);
143	$bodyreplacement .= '<script type="text/javascript" src="'.$this->url.'"></script>';
144	$bodyreplacement .= implode('',$this->move['last']).'</body>';
145	$this->content = str_replace('</body>',$bodyreplacement,$this->content);
146
147	//Return the modified HTML
148	return $this->content;
149	}
150
151	//Checks agains the whitelist
152	private function ismergeable($tag)
153	{
154	foreach($this->domove as $match)
155	{
156	if(strpos($tag,$match)!==false)
157	{
158	//Matched something
159	return false;
160	}
161	}
162
163	foreach($this->dontmove as $match)
164	{
165	if(strpos($tag,$match)!==false)
166	{
167	//Matched something
168	return false;
169	}
170	}
171
172	//If we're here it's safe to merge
173	return true;
174	}
175
176	//Checks agains the blacklist
177	private function ismovable($tag)
178	{
179
180	foreach($this->domove as $match)
181	{
182	if(strpos($tag,$match)!==false)
183	{
184	//Matched something
185	return true;
186	}
187	}
188
189	foreach($this->dontmove as $match)
190	{
191	if(strpos($tag,$match)!==false)
192	{
193	//Matched something
194	return false;
195	}
196	}
197
198	//If we're here it's safe to move
199	return true;
200	}
201
202	private function movetolast($tag)
203	{
204	foreach($this->domovelast as $match)
205	{
206	if(strpos($tag,$match)!==false)
207	{
208	//Matched, return true
209	return true;
210	}
211	}
212
213	//Should be in 'first'
214	return false;
215	}
216	}
217