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CelerityResourceMap.php
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Fri, Dec 27, 10:27

CelerityResourceMap.php
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<?php
/*
* Copyright 2011 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
final class CelerityResourceMap {
private static $instance;
private $resourceMap;
public static function getInstance() {
if (empty(self::$instance)) {
self::$instance = new CelerityResourceMap();
$root = phutil_get_library_root('phabricator');
$ok = @include_once $root.'/__celerity_resource_map__.php';
if (!$ok) {
throw new Exception("Failed to load Celerity resource map!");
}
}
return self::$instance;
}
public function setResourceMap($resource_map) {
$this->resourceMap = $resource_map;
return $this;
}
public function resolveResources(array $symbols) {
$map = array();
foreach ($symbols as $symbol) {
if (!empty($map[$symbol])) {
continue;
}
$this->resolveResource($map, $symbol);
}
return $map;
}
private function resolveResource(array &$map, $symbol) {
if (empty($this->resourceMap[$symbol])) {
throw new Exception(
"Attempting to resolve unknown resource, '{$symbol}'.");
}
$info = $this->resourceMap[$symbol];
foreach ($info['requires'] as $requires) {
if (!empty($map[$requires])) {
continue;
}
$this->resolveResource($map, $requires);
}
$map[$symbol] = $info;
}
}
function celerity_register_resource_map(array $map) {
$instance = CelerityResourceMap::getInstance();
$instance->setResourceMap($map);
}

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