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1 <?php
2 /**
3  * A general message handler
4  *
5  * @author              Roland Haeder <webmaster@ship-simu.org>
6  * @version             0.0.0
7  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Hub Developer Team
8  * @license             GNU GPL 3.0 or any newer version
9  * @link                http://www.ship-simu.org
10  *
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.
15  *
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.
20  *
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/>.
23  */
24 class BaseMessageHandler extends BaseHandler {
25         /**
26          * Array with search criteria elements
27          */
28         private $searchData = array();
29
30         /**
31          * Array with all data XML nodes (which hold the actual data) and their values
32          */
33         protected $messageDataElements = array();
34
35         /**
36          * Protected constructor
37          *
38          * @param       $className      Name of the class
39          * @return      void
40          */
41         protected function __construct ($className) {
42                 // Call parent constructor
43                 parent::__construct($className);
44
45                 // Init array
46                 $this->searchData = array(
47                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_SESSION_ID,
48                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_EXTERNAL_IP,
49                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_TCP_PORT
50                 );
51         }
52
53         /**
54          * Registers an other node with this node by given message data. The
55          * following data must always be present:
56          *
57          * - session-id  (for finding the node's record together with below data)
58          * - external-ip (hostname or IP number)
59          * - tcp-port    (TCP port for inbound connections)
60          *
61          * @param       $messageArray   An array with all minimum message data
62          * @return      void
63          */
64         protected function registerNodeByMessageData (array $messageData) {
65                 // Get a wrapper instance
66                 $wrapperInstance = ObjectFactory::createObjectByConfiguredName('node_list_db_wrapper_class');
67
68                 // Get a search criteria class
69                 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
70
71                 // Search for the node's session id and external IP/hostname + TCP port
72                 foreach ($this->searchData as $key) {
73                         // Add criteria
74                         $searchInstance->addCriteria('node_' . $key, $messageData[$key]);
75                 } // END - foreach
76
77                 // Only one entry is fine
78                 $searchInstance->setLimit(1);
79
80                 // Run the query
81                 $resultInstance = $wrapperInstance->doSelectByCriteria($searchInstance);
82
83                 // Is there already an entry?
84                 if ($resultInstance->next()) {
85                         // Entry found
86                         $resultInstance->debugBackTrace('Entry found!');
87                 } else {
88                         // Nothing found, so register it
89                         $wrapperInstance->registerNodeByMessageData($messageData, $this);
90                 }
91         }
92
93         /**
94          * Prepares a message as answer for given message data for delivery.
95          *
96          * @param       $messageData            An array with all message data
97          * @param       $packageInstance        An instance of a Deliverable instance
98          * @return      void
99          */
100         protected function prepareAnswerMessage (array $messageData, Deliverable $packageInstance) {
101                 // Get a helper instance based on this handler's name
102                 $helperInstance = ObjectFactory::createObjectByConfiguredName('node_answer_' . $this->getHandlerName() . '_helper_class', array($messageData));
103
104                 // Load descriptor XML
105                 $helperInstance->loadDescriptorXml();
106
107                 // Compile any configuration variables
108                 $helperInstance->getTemplateInstance()->compileConfigInVariables();
109
110                 // Get node instance
111                 $nodeInstance = Registry::getRegistry()->getInstance('node');
112
113                 // Deliver the package
114                 $helperInstance->sendPackage($nodeInstance);
115         }
116 }
117
118 // [EOF]
119 ?>