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CelerityPhabricatorResourceController.php
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			<?php

			/**
			* Delivers CSS and JS resources to the browser. This controller handles all
			* `/res/` requests, and manages caching, package construction, and resource
			* preprocessing.
			*/
			final class CelerityPhabricatorResourceController
			extends CelerityResourceController {

			private $path;
			private $hash;
			private $library;
			private $postprocessorKey;

			public function getCelerityResourceMap() {
			return CelerityResourceMap::getNamedInstance($this->library);
			}

			public function handleRequest(AphrontRequest $request) {
			$this->path = $request->getURIData('path');
			$this->hash = $request->getURIData('hash');
			$this->library = $request->getURIData('library');
			$this->postprocessorKey = $request->getURIData('postprocessor');

			// Check that the resource library exists before trying to serve resources
			// from it.
			try {
			$this->getCelerityResourceMap();
			} catch (Exception $ex) {
			return new Aphront400Response();
			}

			return $this->serveResource(
			array(
			'path' => $this->path,
			'hash' => $this->hash,
			));
			}

			protected function buildResourceTransformer() {
			$developer_on = PhabricatorEnv::getEnvConfig('phabricator.developer-mode');
			$should_minify = !$developer_on;

			return id(new CelerityResourceTransformer())
			->setMinify($should_minify)
			->setPostprocessorKey($this->postprocessorKey)
			->setCelerityMap($this->getCelerityResourceMap());
			}

			protected function getCacheKey($path) {
			return parent::getCacheKey($path.';'.$this->postprocessorKey);
			}

			}