server/lib/private/template/resourcelocator.php

<?php
/**
 * Copyright (c) 2013 Bart Visscher <bartv@thisnet.nl>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */

namespace OC\Template;

abstract class ResourceLocator {
	protected $theme;

	protected $mapping;
	protected $serverroot;
	protected $thirdpartyroot;
	protected $webroot;

	protected $resources = array();

	/** @var \OCP\ILogger */
	protected $logger;

	/**
	 * @param \OCP\ILogger $logger
	 * @param string $theme
	 * @param array $core_map
	 * @param array $party_map
	 */
	public function __construct(\OCP\ILogger $logger, $theme, $core_map, $party_map) {
		$this->logger = $logger;
		$this->theme = $theme;
		$this->mapping = $core_map + $party_map;
		$this->serverroot = key($core_map);
		$this->thirdpartyroot = key($party_map);
		$this->webroot = $this->mapping[$this->serverroot];
	}

	/**
	 * @param string $resource
	 */
	abstract public function doFind($resource);

	/**
	 * @param string $resource
	 */
	abstract public function doFindTheme($resource);

	/**
	 * Finds the resources and adds them to the list
	 *
	 * @param array $resources
	 */
	public function find($resources) {
		foreach ($resources as $resource) {
			try {
				$this->doFind($resource);
			} catch (ResourceNotFoundException $e) {
				$resourceApp = substr($resource, 0, strpos($resource, '/'));
				$this->logger->error('Could not find resource file "' . $e->getResourcePath() . '"', ['app' => $resourceApp]);
			}
		}
		if (!empty($this->theme)) {
			foreach ($resources as $resource) {
				try {
					$this->doFindTheme($resource);
				} catch (ResourceNotFoundException $e) {
					$resourceApp = substr($resource, 0, strpos($resource, '/'));
					$this->logger->error('Could not find resource file "' . $e->getResourcePath() . '"', ['app' => $resourceApp]);
				}
			}
		}
	}

	/**
	 * append the $file resource if exist at $root
	 *
	 * @param string $root path to check
	 * @param string $file the filename
	 * @param string|null $webRoot base for path, default map $root to $webRoot
	 * @return bool True if the resource was found, false otherwise
	 */
	protected function appendIfExist($root, $file, $webRoot = null) {
		if (is_file($root.'/'.$file)) {
			$this->append($root, $file, $webRoot, false);
			return true;
		}
		return false;
	}

	/**
	 * append the $file resource at $root
	 *
	 * @param string $root path to check
	 * @param string $file the filename
	 * @param string|null $webRoot base for path, default map $root to $webRoot
	 * @param bool $throw Throw an exception, when the route does not exist
	 * @throws ResourceNotFoundException Only thrown when $throw is true and the resource is missing
	 */
	protected function append($root, $file, $webRoot = null, $throw = true) {
		if (!$webRoot) {
			$webRoot = $this->mapping[$root];
		}
		$this->resources[] = array($root, $webRoot, $file);

		if ($throw && !is_file($root . '/' . $file)) {
			throw new ResourceNotFoundException($file, $webRoot);
		}
	}

	/**
	 * Returns the list of all resources that should be loaded
	 * @return array
	 */
	public function getResources() {
		return $this->resources;
	}
}