1 | <?php |
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2 | |
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3 | /* |
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4 | * This file is part of the Assetic package, an OpenSky project. |
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5 | * |
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6 | * (c) 2010-2012 OpenSky Project Inc |
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7 | * |
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8 | * For the full copyright and license information, please view the LICENSE |
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9 | * file that was distributed with this source code. |
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10 | */ |
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11 | |
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12 | namespace Assetic\Factory\Loader; |
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13 | |
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14 | use Assetic\Cache\ConfigCache; |
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15 | use Assetic\Factory\Resource\IteratorResourceInterface; |
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16 | use Assetic\Factory\Resource\ResourceInterface; |
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17 | |
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18 | /** |
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19 | * Adds a caching layer to a loader. |
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20 | * |
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21 | * A cached formula loader is a composition of a formula loader and a cache. |
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22 | * |
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23 | * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
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24 | */ |
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25 | class CachedFormulaLoader implements FormulaLoaderInterface |
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26 | { |
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27 | private $loader; |
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28 | private $configCache; |
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29 | private $debug; |
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30 | |
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31 | /** |
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32 | * Constructor. |
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33 | * |
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34 | * When the loader is in debug mode it will ensure the cached formulae |
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35 | * are fresh before returning them. |
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36 | * |
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37 | * @param FormulaLoaderInterface $loader A formula loader |
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38 | * @param ConfigCache $configCache A config cache |
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39 | * @param Boolean $debug The debug mode |
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40 | */ |
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41 | public function __construct(FormulaLoaderInterface $loader, ConfigCache $configCache, $debug = false) |
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42 | { |
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43 | $this->loader = $loader; |
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44 | $this->configCache = $configCache; |
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45 | $this->debug = $debug; |
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46 | } |
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47 | |
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48 | public function load(ResourceInterface $resources) |
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49 | { |
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50 | if (!$resources instanceof IteratorResourceInterface) { |
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51 | $resources = array($resources); |
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52 | } |
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53 | |
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54 | $formulae = array(); |
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55 | |
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56 | foreach ($resources as $resource) { |
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57 | $id = (string) $resource; |
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58 | if (!$this->configCache->has($id) || ($this->debug && !$resource->isFresh($this->configCache->getTimestamp($id)))) { |
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59 | $formulae += $this->loader->load($resource); |
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60 | $this->configCache->set($id, $formulae); |
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61 | } else { |
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62 | $formulae += $this->configCache->get($id); |
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63 | } |
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64 | } |
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65 | |
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66 | return $formulae; |
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67 | } |
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68 | } |
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