3 * A action resolver for local (non-hubbed) actions
5 * @author Roland Haeder <webmaster@shipsimu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2013 Core Developer Team
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.shipsimu.org
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 class WebActionResolver extends BaseActionResolver implements ActionResolver {
26 * Last successfull resolved action
28 private $lastActionInstance = NULL;
31 * Protected constructor
35 protected function __construct () {
36 // Call parent constructor
37 parent::__construct(__CLASS__);
39 // Set prefix to "Web"
40 $this->setClassPrefix('Web');
44 * Creates an instance of a Web action resolver with a given default action
46 * @param $actionName The default action we shall execute
47 * @param $applicationInstance An instance of a manageable application helper class
48 * @return $resolverInstance The prepared action resolver instance
49 * @throws EmptyVariableException Thrown if default action is not set
50 * @throws InvalidActionException Thrown if default action is invalid
52 public static final function createWebActionResolver ($actionName, ManageableApplication $applicationInstance) {
53 // Create the new instance
54 $resolverInstance = new WebActionResolver();
56 // Is the variable $actionName set and the action is valid?
57 if (empty($actionName)) {
58 // Then thrown an exception here
59 throw new EmptyVariableException(array($resolverInstance, 'defaultAction'), self::EXCEPTION_UNEXPECTED_EMPTY_STRING);
60 } elseif ($resolverInstance->isActionValid($actionName) === FALSE) {
61 // Invalid action found
62 throw new InvalidActionException(array($resolverInstance, $actionName), self::EXCEPTION_INVALID_ACTION);
65 // Set the application instance
66 $resolverInstance->setApplicationInstance($applicationInstance);
68 // Return the prepared instance
69 return $resolverInstance;
73 * Returns an action instance for a given request class or null if
76 * @param $requestInstance An instance of a request class
77 * @return $actionInstance An instance of the resolved action
78 * @throws InvalidActionException Thrown if $actionName is
80 * @throws InvalidActionInstanceException Thrown if $actionInstance
81 * is an invalid instance
83 public function resolveActionByRequest (Requestable $requestInstance) {
86 $actionInstance = NULL;
88 // This goes fine so let's resolve the action
89 $actionName = $requestInstance->getRequestElement('action');
91 // Is the action empty? Then fall back to default action
92 if (empty($actionName)) {
93 $actionName = $this->getConfigInstance()->getConfigEntry('default_action');
96 // Check if action is valid
97 if ($this->isActionValid($actionName) === FALSE) {
98 // This action is invalid!
99 throw new InvalidActionException(array($this, $actionName), self::EXCEPTION_INVALID_ACTION);
103 $actionInstance = $this->loadAction();
106 if ((!is_object($actionInstance)) || (!$actionInstance instanceof Actionable)) {
107 // This action has an invalid instance!
108 throw new InvalidActionInstanceException(array($this, $actionName), self::EXCEPTION_INVALID_ACTION);
112 $this->setResolvedInstance($actionInstance);
114 // Return the resolved action instance
115 return $actionInstance;
119 * Resolves the action by its direct name and returns an instance of its class
121 * @return $actionInstance An instance of the action class
122 * @throws InvalidActionException Thrown if $actionName is invalid
124 public function resolveAction () {
125 // Initiate the instance variable
126 $actionInstance = NULL;
129 $actionName = $this->getActionName();
131 // Is the action empty? Then fall back to default action
132 if (empty($actionName)) {
133 $actionName = $this->getConfigInstance()->getConfigEntry('default_action');
136 // Check if action is valid
137 if ($this->isActionValid($actionName) === FALSE) {
138 // This action is invalid!
139 throw new InvalidActionException(array($this, $actionName), self::EXCEPTION_INVALID_ACTION);
143 $actionInstance = $this->loadAction();
145 // Return the instance
146 return $actionInstance;