nextcloud/lib/private/AppFramework/Routing/RouteParser.php

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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\AppFramework\Routing;
use OC\Route\Route;
use Symfony\Component\Routing\RouteCollection;
class RouteParser {
/** @var string[] */
private $controllerNameCache = [];
private const rootUrlApps = [
'cloud_federation_api',
'core',
'files_sharing',
'files',
'settings',
'spreed',
];
public function parseDefaultRoutes(array $routes, string $appName): RouteCollection {
$collection = $this->processIndexRoutes($routes, $appName);
$collection->addCollection($this->processIndexResources($routes, $appName));
return $collection;
}
public function parseOCSRoutes(array $routes, string $appName): RouteCollection {
$collection = $this->processOCS($routes, $appName);
$collection->addCollection($this->processOCSResources($routes, $appName));
return $collection;
}
private function processOCS(array $routes, string $appName): RouteCollection {
$collection = new RouteCollection();
$ocsRoutes = $routes['ocs'] ?? [];
foreach ($ocsRoutes as $ocsRoute) {
$result = $this->processRoute($ocsRoute, $appName, 'ocs.');
$collection->add($result[0], $result[1]);
}
return $collection;
}
/**
* Creates one route base on the give configuration
* @param array $routes
* @throws \UnexpectedValueException
*/
private function processIndexRoutes(array $routes, string $appName): RouteCollection {
$collection = new RouteCollection();
$simpleRoutes = $routes['routes'] ?? [];
foreach ($simpleRoutes as $simpleRoute) {
$result = $this->processRoute($simpleRoute, $appName);
$collection->add($result[0], $result[1]);
}
return $collection;
}
private function processRoute(array $route, string $appName, string $routeNamePrefix = ''): array {
$name = $route['name'];
$postfix = $route['postfix'] ?? '';
$root = $this->buildRootPrefix($route, $appName, $routeNamePrefix);
$url = $root . '/' . ltrim($route['url'], '/');
$verb = strtoupper($route['verb'] ?? 'GET');
$split = explode('#', $name, 2);
if (count($split) !== 2) {
throw new \UnexpectedValueException('Invalid route name');
}
list($controller, $action) = $split;
$controllerName = $this->buildControllerName($controller);
$actionName = $this->buildActionName($action);
$routeName = $routeNamePrefix . $appName . '.' . $controller . '.' . $action . $postfix;
$routeObject = new Route($url);
$routeObject->method($verb);
// optionally register requirements for route. This is used to
// tell the route parser how url parameters should be matched
if (array_key_exists('requirements', $route)) {
$routeObject->requirements($route['requirements']);
}
// optionally register defaults for route. This is used to
// tell the route parser how url parameters should be default valued
$defaults = [];
if (array_key_exists('defaults', $route)) {
$defaults = $route['defaults'];
}
$defaults['caller'] = [$appName, $controllerName, $actionName];
$routeObject->defaults($defaults);
return [$routeName, $routeObject];
}
/**
* For a given name and url restful OCS routes are created:
* - index
* - show
* - create
* - update
* - destroy
*
* @param array $routes
*/
private function processOCSResources(array $routes, string $appName): RouteCollection {
return $this->processResources($routes['ocs-resources'] ?? [], $appName, 'ocs.');
}
/**
* For a given name and url restful routes are created:
* - index
* - show
* - create
* - update
* - destroy
*
* @param array $routes
*/
private function processIndexResources(array $routes, string $appName): RouteCollection {
return $this->processResources($routes['resources'] ?? [], $appName);
}
/**
* For a given name and url restful routes are created:
* - index
* - show
* - create
* - update
* - destroy
*
* @param array $resources
* @param string $routeNamePrefix
*/
private function processResources(array $resources, string $appName, string $routeNamePrefix = ''): RouteCollection {
// declaration of all restful actions
$actions = [
['name' => 'index', 'verb' => 'GET', 'on-collection' => true],
['name' => 'show', 'verb' => 'GET'],
['name' => 'create', 'verb' => 'POST', 'on-collection' => true],
['name' => 'update', 'verb' => 'PUT'],
['name' => 'destroy', 'verb' => 'DELETE'],
];
$collection = new RouteCollection();
foreach ($resources as $resource => $config) {
$root = $this->buildRootPrefix($config, $appName, $routeNamePrefix);
// the url parameter used as id to the resource
foreach ($actions as $action) {
$url = $root . '/' . ltrim($config['url'], '/');
$method = $action['name'];
$verb = strtoupper($action['verb'] ?? 'GET');
$collectionAction = $action['on-collection'] ?? false;
if (!$collectionAction) {
$url .= '/{id}';
}
$controller = $resource;
$controllerName = $this->buildControllerName($controller);
$actionName = $this->buildActionName($method);
$routeName = $routeNamePrefix . $appName . '.' . strtolower($resource) . '.' . $method;
$route = new Route($url);
$route->method($verb);
$route->defaults(['caller' => [$appName, $controllerName, $actionName]]);
$collection->add($routeName, $route);
}
}
return $collection;
}
private function buildRootPrefix(array $route, string $appName, string $routeNamePrefix): string {
$defaultRoot = $appName === 'core' ? '' : '/apps/' . $appName;
$root = $route['root'] ?? $defaultRoot;
if ($routeNamePrefix !== '') {
// In OCS all apps are whitelisted
return $root;
}
if (!\in_array($appName, self::rootUrlApps, true)) {
// Only allow root URLS for some apps
return $defaultRoot;
}
return $root;
}
/**
* Based on a given route name the controller name is generated
* @param string $controller
* @return string
*/
private function buildControllerName(string $controller): string {
if (!isset($this->controllerNameCache[$controller])) {
$this->controllerNameCache[$controller] = $this->underScoreToCamelCase(ucfirst($controller)) . 'Controller';
}
return $this->controllerNameCache[$controller];
}
/**
* Based on the action part of the route name the controller method name is generated
* @param string $action
* @return string
*/
private function buildActionName(string $action): string {
return $this->underScoreToCamelCase($action);
}
/**
* Underscored strings are converted to camel case strings
* @param string $str
* @return string
*/
private function underScoreToCamelCase(string $str): string {
$pattern = '/_[a-z]?/';
return preg_replace_callback(
$pattern,
function ($matches) {
return strtoupper(ltrim($matches[0], '_'));
},
$str);
}
}