AssetsMinify/AssetsMinifyInit.php at master · cdCorey/AssetsMinify · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
<?php
/**
 * @package Assets Minify
 */

use Assetic\Factory\AssetFactory;
use Assetic\AssetManager;
use Assetic\FilterManager;
use Assetic\Filter\JSMinFilter;
use Assetic\Filter\CssMinFilter;
use Assetic\Filter\CssRewriteFilter;
use Assetic\Filter\ScssphpFilter;
use Assetic\Filter\CoffeeScriptFilter;
use Assetic\Filter\CompassFilter;
use Assetic\Filter\LessphpFilter;
use Assetic\Cache\FilesystemCache;
use Assetic\Asset\StringAsset;

/**
 * Class that holds plugin's logic.
 */
class AssetsMinifyInit {

	public $js;
	public $css;

	protected $exclusions;

	protected $assetsPath;
	protected $assetsUrl;

	protected $jsFilters    = array();
	protected $cssFilters   = array();

	protected $styles       = array();
	protected $mTimesStyles = array();

	protected $sass         = array();
	protected $mTimesSass   = array();

	protected $less         = array();
	protected $mTimesLess   = array();

	protected $scripts      = array( 'header' => array(), 'footer' => array() );
	protected $mTimes       = array( 'header' => array(), 'footer' => array() );

	protected $coffee       = array( 'header' => array(), 'footer' => array() );
	protected $mTimesCoffee = array( 'header' => array(), 'footer' => array() );

	protected $jsMin        = 'JSMin';
	protected $cssMin       = 'CssMin';

	/**
	 * Constructor of the class
	 */
	public function __construct() {

		//Init assetic's object to manage js minify
		$this->js = new AssetFactory( ABSPATH );
		$this->js->setAssetManager( new AssetManager );
		$this->js->setFilterManager( new FilterManager );

		//Init assetic's object to manage css minify
		$this->css = new AssetFactory( ABSPATH );
		$this->css->setAssetManager( new AssetManager );
		$this->css->setFilterManager( new FilterManager );

		//Defines filter for js minify
		$this->js->getFilterManager()->set($this->jsMin, new JSMinFilter);
		$this->jsFilters []= $this->jsMin;

		//Defines filter for css minify
		$this->css->getFilterManager()->set($this->cssMin, new CssMinFilter);
		$this->css->getFilterManager()->set('CssRewrite', new CssRewriteFilter);
		$this->cssFilters []= $this->cssMin;

		//Define assets path to save asseticized files
		$uploadsDir = wp_upload_dir();
		$this->assetsUrl  = str_replace( 'http://', '//', $uploadsDir['baseurl'] ) . '/am_assets/';
		$this->assetsPath = $uploadsDir['basedir'] . '/am_assets/';

		if ( !is_dir($this->assetsPath) ) //Creates the AM cache dir
			mkdir($this->assetsPath, 0777);
		elseif ( get_option('am_last_gc', 0) <= time() - 864000 ) //Every 10 days the garbage collector is called
			$this->gc();

		//Manager for Filesystem management
		$this->cache = new FilesystemCache( $this->assetsPath );

		$this->exclusions = preg_split('/[ ]*,[ ]*/', trim(get_option('am_files_to_exclude')));

		//Detects all js and css added to WordPress and removes their inclusion
		if( get_option('am_compress_styles', 1) )
			add_action( 'wp_print_styles',  array( $this, 'extractStyles' ) );
		if( get_option('am_compress_scripts', 1) )
			add_action( 'wp_print_scripts', array( $this, 'extractScripts' ) );

		//Inclusion of scripts in <head> and before </body>
		add_action( 'wp_head',   array( $this, 'headerServe' ) );
		add_action( 'wp_footer', array( $this, 'footerServe' ) );

	}

	/**
	 * Garbage collector for 10 days old files
	 */
	public function gc() {
		update_option( 'am_last_gc', time() );
		foreach ( glob("{$this->assetsPath}*.*") as $filepath )
			if ( filemtime($filepath) <= time() - 864000 ) //If the file is older than 10 days then is removed
				unlink($filepath);
	}

	/**
	 * Guess absolute path from file URL
	 */
	public function guessPath( $file_url ) {

		$components = parse_url($file_url);

		// Check we have at least a path
		if( !isset($components['path']) )
			return false;

		$file_path = false;

		// Script is enqueued from a plugin
		if( strpos($file_url, WP_PLUGIN_URL) !== false )
			$file_path = WP_PLUGIN_DIR . str_replace(WP_PLUGIN_URL, '', $file_url);

		// Script is enqueued from a theme
		if( strpos($file_url, WP_CONTENT_URL) !== false )
			$file_path = WP_CONTENT_DIR . str_replace(WP_CONTENT_URL, '', $file_url);

		// Script is enqueued from wordpress
		if( strpos($file_url,  WPINC) !== false )
			$file_path = untrailingslashit(ABSPATH) . $file_url;

		return $file_path;
	}

	/**
	 * Checks if the file is within the list of "to exclude" resources
	 *
	 * @param string $path The file path
	 * @return boolean Whether the file is to exclude or not
	 */
	protected function isFileExcluded( $path ) {
		$filename = explode('/', $path);
		if ( in_array($filename[ count($filename) - 1 ], $this->exclusions) )
			return true;

		return false;
	}

	/**
	 * Takes all the scripts enqueued to the theme and removes them from the queue
	 */
	public function extractScripts() {
		global $wp_scripts;

		if ( empty($wp_scripts->queue) )
			return;

		// Trigger dependency resolution
		$wp_scripts->all_deps($wp_scripts->queue);

		foreach( $wp_scripts->to_do as $key => $handle ) {

			if ( $this->isFileExcluded($wp_scripts->registered[$handle]->src) )
				continue;

			$script_path = $this->guessPath($wp_scripts->registered[$handle]->src);

			// Script didn't match any case (plugin, theme or wordpress locations)
			if( $script_path === false )
				continue;

			$where = 'footer';
			//Unfortunately not every WP plugin developer is a JS ninja
			//So... let's put it in the header.
			if ( empty($wp_scripts->registered[$handle]->extra) )
				$where = 'header';

			if ( empty($script_path) || !is_file($script_path) )
				continue;

			//Separation between css-frameworks stylesheets and .css stylesheets
			$ext = substr( $script_path, -7 );

			if ( $ext === '.coffee' ) {
				$this->coffee[ $where ][ $handle ] = $script_path;
				$this->mTimesCoffee[ $where ][ $handle ]  = filemtime( $this->coffee[ $where ][ $handle ] );
			} else {
				$this->scripts[ $where ][ $handle ] = $script_path;
				$this->mTimes[ $where ][ $handle ]  = filemtime( $this->scripts[ $where ][ $handle ] );
			}

			//Removes scripts from the queue so this plugin will be
			//responsible to include all the scripts except other domains ones.
			$wp_scripts->dequeue( $handle );

			//Move the handle to the done array.
			$wp_scripts->done[] = $handle;
			unset($wp_scripts->to_do[$key]);
		}

	}

	/**
	 * Takes all the stylesheets enqueued to the theme and removes them from the queue
	 */
	public function extractStyles() {
		global $wp_styles;

		if ( empty($wp_styles->queue) )
			return;

		// Trigger dependency resolution
		$wp_styles->all_deps($wp_styles->queue);

		foreach( $wp_styles->to_do as $key => $handle ) {

			if ( $this->isFileExcluded($wp_styles->registered[$handle]->src) )
				continue;

			//Removes absolute part of the path if it's specified in the src
			$style_path = $this->guessPath($wp_styles->registered[$handle]->src);

			// Script didn't match any case (plugin, theme or wordpress locations)
			if( $style_path == false )
				continue;

			if ( !file_exists($style_path) )
				continue;

			//Separation between css-frameworks stylesheets and .css stylesheets
			$ext = substr( $style_path, -5 );
			if ( in_array( $ext, array('.sass', '.scss') ) ) {
				$this->sass[ $handle ]       = $style_path;
				$this->mTimesSass[ $handle ] = filemtime($this->sass[ $handle ]);
			} elseif ( $ext == '.less' ) {
				$this->less[ $handle ]       = $style_path;
				$this->mTimesLess[ $handle ] = filemtime($this->less[ $handle ]);
			} else {
				$this->styles[ $handle ]       = $style_path;
				$this->mTimesStyles[ $handle ] = filemtime($this->styles[ $handle ]);
			}

			//Removes css from the queue so this plugin will be
			//responsible to include all the stylesheets except other domains ones.
			$wp_styles->dequeue( $handle );

			//Move the handle to the done array.
			$wp_styles->done[] = $handle;
			unset($wp_styles->to_do[$key]);
		}
	}

	/**
	 * Returns header's inclusion for CSS and JS (if provided)
	 */
	public function headerServe() {

		//Compiles CSS stylesheets
		$this->generateCss();

		//Compiles SASS stylesheets
		$this->generateSass();

		//Compiles LESS stylesheets
		$this->generateLess();

		//Manages the stylesheets
		if ( !empty($this->styles) ) {
			$mtime = md5(implode('&', $this->mTimesStyles));

			//Saves the asseticized stylesheets
			if ( !$this->cache->has( "head-{$mtime}.css" ) ) {
				$cssDump = str_replace('../', '/', $this->css->createAsset( $this->styles, $this->cssFilters )->dump() );
				$cssDump = str_replace( 'url(/wp-', 'url(' . site_url() . '/wp-', $cssDump );
				$cssDump = str_replace( 'url("/wp-', 'url("' . site_url() . '/wp-', $cssDump );
				$cssDump = str_replace( "url('/wp-", "url('" . site_url() . "/wp-", $cssDump );
				$this->cache->set( "head-{$mtime}.css", $cssDump );
			}

			//Prints css inclusion in the page
			$this->dumpCss( "head-{$mtime}.css" );
		}

		//Manages the scripts from CoffeeScript to be printed in the header
		$this->generateCoffee('header');

		//Manages the scripts to be printed in the header
		$this->headerServeScripts();

	}

	/**
	 * Takes all the SASS stylesheets and manages their queue to asseticize them
	 */
	public function generateSass() {
		if ( empty($this->sass) )
			return false;

		$mtime = md5(implode('&', $this->mTimesSass) . implode('&', $this->sass));

		//If SASS stylesheets have been updated -> compass compile
		if ( !$this->cache->has( "sass-{$mtime}.css" ) ) {

			if ( get_option('am_use_compass', 0) != 0 ) {
				//Defines compass filter instance and sprite images paths
				$compassInstance = new CompassFilter( get_option('am_compass_path', '/usr/bin/compass') );
				$compassInstance->setImagesDir(get_theme_root() . "/" . get_template() . "/images");
				$compassInstance->setGeneratedImagesPath( $this->assetsPath );
				$compassInstance->setHttpGeneratedImagesPath( site_url() . str_replace( getcwd(), '', $this->assetsPath ) );
				$this->css->getFilterManager()->set('Compass', $compassInstance);
				$filter = 'Compass';
			} else {
				$this->css->getFilterManager()->set('Scssphp', new ScssphpFilter);
				$filter = 'Scssphp';
			}

			//Saves the asseticized stylesheets
			$this->cache->set( "sass-{$mtime}.css", $this->css->createAsset( $this->sass, array( $filter, 'CssRewrite' ) )->dump() );
		}

		//Adds SASS compiled stylesheet to normal css queue
		$this->styles['sass-am-generated']       = $this->assetsPath . "sass-{$mtime}.css";
		$this->mTimesStyles['sass-am-generated'] = filemtime($this->styles['sass-am-generated']);
	}

	/**
	 * Takes all the LESS stylesheets and manages their queue to asseticize them
	 */
	public function generateLess() {
		if ( empty($this->less) )
			return false;

		$mtime = md5(implode('&', $this->mTimesLess) . implode('&', $this->less));

		//If LESS stylesheets have been updated compile them
		if ( !$this->cache->has( "less-{$mtime}.css" )  ) {
			//Defines compass filter instance and sprite images paths
			$this->css->getFilterManager()->set('Lessphp', new LessphpFilter);

			//Saves the asseticized stylesheets
			$this->cache->set( "less-{$mtime}.css", $this->css->createAsset( $this->less, array( 'Lessphp', 'CssRewrite' ) )->dump() );
		}

		//Adds LESS compiled stylesheet to normal css queue
		$this->styles['less-am-generated']       = $this->assetsPath . "less-{$mtime}.css";
		$this->mTimesStyles['less-am-generated'] = filemtime($this->styles['less-am-generated']);
	}

	/**
	 * Takes all the CSS stylesheets and manages their queue to asseticize them
	 */
	public function generateCss() {
		if ( empty($this->styles) )
			return false;

		$mtime = md5(implode('&', $this->mTimesStyles) . implode('&', $this->styles));

		//If CSS stylesheets have been updated compile and save them
		if ( !$this->cache->has( "styles-{$mtime}.css" ) )
			$this->cache->set( "styles-{$mtime}.css", $this->css->createAsset( $this->styles, array( 'CssRewrite' ) )->dump() );

		//Adds CSS compiled stylesheet to normal css queue
		$this->styles       = array( 'styles-am-generated' => $this->assetsPath . "styles-{$mtime}.css");
		$this->mTimesStyles = array( 'styles-am-generated' => filemtime($this->styles['styles-am-generated']) );
	}

	/**
	 * Returns coffeescript inclusions for JS (if provided)
	 */
	public function generateCoffee( $type ) {
		if ( empty($this->coffee[$type]) )
			return false;

		$mtime = md5(implode('&', $this->mTimesCoffee[$type]) . implode('&', $this->coffee[$type]) );

		//Saves the asseticized header scripts
		if ( !$this->cache->has( "{$type}-cs-{$mtime}.js" ) ) {
			$this->js->getFilterManager()->set('CoffeeScriptFilter', new CoffeeScriptFilter( get_option('am_coffeescript_path', '/usr/bin/coffee') ));
			$this->cache->set( "{$type}-cs-{$mtime}.js", $this->js->createAsset( $this->coffee[$type], array($this->jsMin, 'CoffeeScriptFilter') )->dump() );
		}


		//Adds Coffeescript compiled stylesheet to normal js queue
		$script = $this->assetsPath . "{$type}-cs-{$mtime}.js";
		$this->scripts[$type][]= $script;
		$this->mTimes[$type][]= filemtime($script);
	}

	/**
	 * Returns header's inclusion for JS (if provided)
	 */
	public function headerServeScripts() {
		if ( empty($this->scripts['header']) )
			return false;

		$mtime = md5(implode('&', $this->mTimes['header']) . implode('&', $this->scripts['header']) );

		//Saves the asseticized header scripts
		if ( !$this->cache->has( "head-{$mtime}.js" ) )
			$this->cache->set( "head-{$mtime}.js", $this->js->createAsset( $this->scripts['header'], $this->jsFilters )->dump() );

		//Prints <script> inclusion in the page
		$this->dumpScriptData( 'header' );
		$this->dumpJs( "head-{$mtime}.js", false );
	}

	/**
	 * Returns footer's inclusion for JS (if provided)
	 */
	public function footerServe() {

		//Manages the scripts from CoffeeScript to be printed in the footer
		$this->generateCoffee('footer');

		if ( empty($this->scripts['footer']) )
			return false;

		$mtime = md5(implode('&', $this->mTimes['footer']) . implode('&', $this->scripts['footer']));

		//Saves the asseticized footer scripts
		if ( !$this->cache->has( "foot-{$mtime}.js" ) )
			$this->cache->set( "foot-{$mtime}.js", $this->js->createAsset( $this->scripts['footer'], $this->jsFilters )->dump() );

		//Prints <script> inclusion in the page
		$this->dumpScriptData( 'footer' );
		$this->dumpJs( "foot-{$mtime}.js" );
	}

	/**
	 * Combines the script data from all minified scripts
	 */
	protected function buildScriptData( $where ) {
		global $wp_scripts;
		$data = '';

		if ( empty($this->scripts[$where] ) )
			return '';

		foreach ($this->scripts[$where] as $handle => $filepath) {
			$data .= $wp_scripts->print_extra_script( $handle, false );
		}

		$asset = new StringAsset( $data, array(new JSMinFilter) );

		return $asset->dump();
	}

	/**
	 * Prints <script> tag to include the JS
	 */
	protected function dumpJs( $filename, $async = true ) {
		echo "<script type='text/javascript' src='" . $this->assetsUrl . $filename . "'" . ($async ? " async" : "") . "></script>";
	}

	/**
	 * Prints <link> tag to include the CSS
	 */
	protected function dumpCss( $filename ) {
		echo "<link href='" . $this->assetsUrl . $filename . "' media='screen, projection' rel='stylesheet' type='text/css'>";
	}

	/**
	 * Prints <script> tags with addtional script data and i10n
	 */
	protected function dumpScriptData( $where ) {
		$data = $this->buildScriptData( $where );

		if (empty($data))
			return false;

		echo "<script type='text/javascript'>\n"; // CDATA and type='text/javascript' is not needed for HTML 5
		echo "/* <![CDATA[ */\n";
		echo "$data\n";
		echo "/* ]]> */\n";
		echo "</script>\n";
	}
}

new AssetsMinifyInit;