289 lines
7.8 KiB
PHP
289 lines
7.8 KiB
PHP
<?php
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/**
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* Dynamic Content Class File for PICKLES
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*
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* PHP version 5
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*
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* Licensed under The MIT License
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* Redistribution of these files must retain the above copyright notice.
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*
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* @author Josh Sherman <pickles@joshtronic.com>
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* @copyright Copyright 2007-2012, Josh Sherman
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* @license http://www.opensource.org/licenses/mit-license.html
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* @package PICKLES
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* @link https://github.com/joshtronic/pickles
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*/
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/**
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* Dynamic Class
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*
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* Handles generating links to static content that are a timestamp injected as
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* to avoid hard caching. Also minifies content where applicable.
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*
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* Note: you will want to add a mod_rewrite line to your .htaccess to support
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* the routing to the filenames with the timestamp injected:
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*
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* RewriteRule ^(.+)\.([\d]+)\.(css|js|gif|png|jpg|jpeg)$ /$1.$3 [NC,QSA]
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*/
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class Dynamic extends Object
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{
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/**
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* Generate Reference
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*
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* Appends a dynamic piece of information to the passed reference in the
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* form of a UNIX timestamp added to the query string.
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*
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* @param string $reference URI reference of the file
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* @param string $failover URI reference to use if the reference can't be found
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* @return string URI reference reference with dynamic content
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*/
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public function reference($reference, $failover = false)
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{
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// Checks if the URI reference is absolute, and not relative
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if (substr($reference, 0, 1) == '/')
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{
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$query_string = '';
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// Checks for ? and extracts query string
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if (strstr($reference, '?'))
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{
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list($reference, $query_string) = explode('?', $reference);
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}
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// Adds the dot so the file functions can find the file
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$file = '.' . $reference;
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if (file_exists($file))
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{
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// Replaces the extension with time().extension
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$parts = explode('.', $reference);
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if (count($parts) == 1)
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{
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throw new Exception('Filename must have an extension (e.g. /path/to/file.png)');
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}
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else
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{
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end($parts);
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$parts[key($parts)] = filemtime($file) . '.' . current($parts);
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$reference = implode('.', $parts);
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}
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// Adds the query string back
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if ($query_string != '')
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{
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$reference .= '?' . $query_string;
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}
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}
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else
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{
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if ($failover != false)
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{
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$reference = $failover;
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}
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else
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{
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throw new Exception('Supplied reference does not exist (' . $reference . ')');
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}
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}
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}
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else
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{
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throw new Exception('Reference value must be absolute (e.g. /path/to/file.png)');
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}
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return $reference;
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}
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/**
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* Generate Stylesheet Reference
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*
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* Attempts to minify the stylesheet and then returns the reference URI for
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* the file, minified or not. Supports LESS, pass it a .less file instead
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* and it will be compiled before minification.
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*
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* @param string $reference URI reference of the Stylesheet
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* @return string URI reference reference with dynamic content
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* @url http://lesscss.org
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*/
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public function css($original_reference)
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{
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$less = false;
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// Injects .min into the filename
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$parts = explode('.', $original_reference);
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if (count($parts) == 1)
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{
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throw new Exception('Filename must have an extension (e.g. /path/to/file.css)');
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}
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else
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{
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end($parts);
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if (current($parts) == 'less')
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{
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$less = true;
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$parts[key($parts)] = 'css';
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}
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$parts[key($parts)] = 'min.' . current($parts);
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$minified_reference = implode('.', $parts);
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}
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$original_filename = '.' . $original_reference;
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$minified_filename = '.' . $minified_reference;
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$path = dirname($original_filename);
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if (file_exists($original_filename))
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{
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$reference = $original_reference;
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if (is_writable($path)
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&& (!file_exists($minified_filename) || filemtime($original_filename) > filemtime($minified_filename))
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&& $this->config->pickles['minify'] === true)
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{
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// Compiles LESS to CSS before minifying
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if ($less)
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{
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$compiled_filename = str_replace('.min', '', $minified_filename);
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exec('export PATH=$PATH:/usr/local/bin; ' . PICKLES_PATH . 'vendors/cloudhead/less.js/bin/lessc ' . $original_filename . ' > ' . $compiled_filename);
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$original_filename = $compiled_filename;
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}
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// Minifies CSS with a few basic character replacements.
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$stylesheet = file_get_contents($original_filename);
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$stylesheet = str_replace(array("\t", "\n", ', ', ' {', ': ', ';}', ' '), array('', '', ',', '{', ':', '}', ''), $stylesheet);
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$stylesheet = preg_replace('/\/\*.+?\*\//', '', $stylesheet);
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file_put_contents($minified_filename, $stylesheet);
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$reference = $minified_reference;
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}
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elseif (file_exists($minified_filename))
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{
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$reference = $minified_reference;
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}
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else
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{
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if ($this->config->pickles['logging'] === true)
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{
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Log::warning('Unable to minify ' . $original_reference . ' and a minified copy does not already exist');
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}
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}
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$reference = $this->reference($reference);
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}
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else
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{
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throw new Exception('Supplied reference does not exist');
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}
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return $reference;
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}
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/**
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* Generate Javascript Reference
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*
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* Attempts to minify the source with Google's Closure compiler, and then
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* returns the reference URI for the file, minified or not.
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*
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* @link http://code.google.com/closure/compiler/
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* @param string $reference URI reference of the Javascript file
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* @return string URI reference reference with dynamic content
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*/
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public function js($original_reference, $level = 'simple')
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{
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$level = strtoupper($level);
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switch ($level)
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{
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CASE 'WHITESPACE':
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CASE 'SIMPLE':
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CASE 'ADVANCED':
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// Injects .min into the filename
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$parts = explode('.', $original_reference);
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if (count($parts) == 1)
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{
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throw new Exception('Filename must have an extension (e.g. /path/to/file.js)');
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}
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else
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{
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end($parts);
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$parts[key($parts)] = 'min.' . current($parts);
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$minified_reference = implode('.', $parts);
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}
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$original_filename = '.' . $original_reference;
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$minified_filename = '.' . $minified_reference;
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$path = dirname($original_filename);
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if (file_exists($original_filename))
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{
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$reference = $original_reference;
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if (is_writable($path)
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&& (!file_exists($minified_filename) || filemtime($original_filename) > filemtime($minified_filename))
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&& extension_loaded('curl')
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&& $this->config->pickles['minify'] === true)
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{
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// Sets up the options list
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$options = array(
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CURLOPT_URL => 'http://closure-compiler.appspot.com/compile',
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_HTTPHEADER => array('Content-Type: application/x-www-form-urlencoded; charset=utf-8'),
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CURLOPT_POST => true,
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CURLOPT_POSTFIELDS => 'js_code=' . urlencode(file_get_contents($original_filename)) . '&compilation_level=' . ($level . '_' . ($level == 'WHITESPACE' ? 'ONLY' : 'OPTIMIZATIONS')) . '&output_format=text&output_info=compiled_code'
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);
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try
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{
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// Executes the request
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$curl = curl_init();
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curl_setopt_array($curl, $options);
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file_put_contents($minified_filename, curl_exec($curl));
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curl_close($curl);
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$reference = $minified_reference;
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}
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catch (Exception $exception)
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{
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$reference = $original_reference;
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}
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}
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elseif (file_exists($minified_filename))
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{
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$reference = $minified_reference;
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}
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else
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{
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if ($this->config->pickles['logging'] === true)
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{
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Log::warning('Unable to minify ' . $original_reference . ' and a minified copy does not already exist');
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}
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}
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$reference = $this->reference($reference);
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}
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else
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{
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throw new Exception('Supplied reference does not exist');
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}
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break;
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default:
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throw new Exception('The level "' . $level . '" is invalid. Valid levels include "whitespace", "simple" and "advanced"');
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break;
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}
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return $reference;
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}
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}
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?>
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