[7265] | 1 | <?php |
---|
| 2 | |
---|
| 3 | /* |
---|
| 4 | * This file is part of the Assetic package, an OpenSky project. |
---|
| 5 | * |
---|
| 6 | * (c) 2010-2012 OpenSky Project Inc |
---|
| 7 | * |
---|
| 8 | * For the full copyright and license information, please view the LICENSE |
---|
| 9 | * file that was distributed with this source code. |
---|
| 10 | */ |
---|
| 11 | |
---|
| 12 | namespace Assetic\Factory\Worker; |
---|
| 13 | |
---|
| 14 | use Assetic\Asset\AssetInterface; |
---|
| 15 | |
---|
| 16 | /** |
---|
| 17 | * Adds cache busting code |
---|
| 18 | * |
---|
| 19 | * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
---|
| 20 | */ |
---|
| 21 | class CacheBustingWorker implements WorkerInterface |
---|
| 22 | { |
---|
| 23 | const STRATEGY_CONTENT = 1; |
---|
| 24 | const STRATEGY_MODIFICATION = 2; |
---|
| 25 | |
---|
| 26 | private $strategy; |
---|
| 27 | |
---|
| 28 | public function __construct($strategy = self::STRATEGY_CONTENT) |
---|
| 29 | { |
---|
| 30 | $this->strategy = $strategy; |
---|
| 31 | } |
---|
| 32 | |
---|
| 33 | public function process(AssetInterface $asset) |
---|
| 34 | { |
---|
| 35 | $hash = hash_init('sha1'); |
---|
| 36 | |
---|
| 37 | switch($this->strategy) { |
---|
| 38 | case self::STRATEGY_MODIFICATION: |
---|
| 39 | hash_update($hash, $asset->getLastModified()); |
---|
| 40 | break; |
---|
| 41 | case self::STRATEGY_CONTENT: |
---|
| 42 | hash_update($hash, $asset->dump()); |
---|
| 43 | break; |
---|
| 44 | } |
---|
| 45 | |
---|
| 46 | foreach ($asset as $i => $leaf) { |
---|
| 47 | if ($sourcePath = $leaf->getSourcePath()) { |
---|
| 48 | hash_update($hash, $sourcePath); |
---|
| 49 | } else { |
---|
| 50 | hash_update($hash, $i); |
---|
| 51 | } |
---|
| 52 | } |
---|
| 53 | |
---|
| 54 | $hash = substr(hash_final($hash), 0, 7); |
---|
| 55 | $url = $asset->getTargetPath(); |
---|
| 56 | |
---|
| 57 | $oldExt = pathinfo($url, PATHINFO_EXTENSION); |
---|
| 58 | $newExt = '-'.$hash.'.'.$oldExt; |
---|
| 59 | |
---|
| 60 | if (!$oldExt || 0 < preg_match('/'.preg_quote($newExt, '/').'$/', $url)) { |
---|
| 61 | return; |
---|
| 62 | } |
---|
| 63 | |
---|
| 64 | $asset->setTargetPath(substr($url, 0, (strlen($oldExt) + 1) * -1).$newExt); |
---|
| 65 | } |
---|
| 66 | |
---|
| 67 | public function getStrategy() |
---|
| 68 | { |
---|
| 69 | return $this->strategy; |
---|
| 70 | } |
---|
| 71 | |
---|
| 72 | public function setStrategy($strategy) |
---|
| 73 | { |
---|
| 74 | $this->strategy = $strategy; |
---|
| 75 | |
---|
| 76 | return $this; |
---|
| 77 | } |
---|
| 78 | } |
---|