CelerityPhysicalResources.php
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	<?php

	/**
	* Defines the location of physical static resources which exist at build time
	* and are precomputed into a resource map.
	*/
	abstract class CelerityPhysicalResources extends CelerityResources {

	private $map;

	abstract public function getPathToMap();
	abstract public function findBinaryResources();
	abstract public function findTextResources();

	public function loadMap() {
	if ($this->map === null) {
	$this->map = include $this->getPathToMap();
	}
	return $this->map;
	}

	public static function getAll() {
	static $resources_map;

	if ($resources_map === null) {
	$resources_map = array();

	$resources_list = id(new PhutilSymbolLoader())
	->setAncestorClass(__CLASS__)
	->loadObjects();

	foreach ($resources_list as $resources) {
	$name = $resources->getName();

	if (!preg_match('/^[a-z0-9]+/', $name)) {
	throw new Exception(
	pht(
	'Resources name "%s" is not valid; it must contain only '.
	'lowercase latin letters and digits.',
	$name));
	}

	if (empty($resources_map[$name])) {
	$resources_map[$name] = $resources;
	} else {
	$old = get_class($resources_map[$name]);
	$new = get_class($resources);
	throw new Exception(
	pht(
	'Celerity resource maps must have unique names, but maps %s and '.
	'%s share the same name, "%s".',
	$old,
	$new,
	$name));
	}
	}
	}

	return $resources_map;
	}

	}