application/hub/main/nodes/class_BaseHubNode.php

   1 <?php
   2 /**
   3  * A general hub node class
   4  *
   5  * @author              Roland Haeder <webmaster@ship-simu.org>
   6  * @version             0.0.0
   7  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 Core 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 BaseHubNode extends BaseFrameworkSystem implements Updateable {
  25         /**
  26          * Node id
  27          */
  28         private $nodeId = "";
  29
  30         /**
  31          * Protected constructor
  32          *
  33          * @param       $className      Name of the class
  34          * @return      void
  35          */
  36         protected function __construct ($className) {
  37                 // Call parent constructor
  38                 parent::__construct($className);
  39
  40                 // Clean up a little
  41                 $this->removeNumberFormaters();
  42                 $this->removeSystemArray();
  43         }
  44
  45         /**
  46          * Setter for node id
  47          *
  48          * @param       $nodeId         Our new node id
  49          * @return      void
  50          */
  51         private final function setNodeId ($nodeId) {
  52                 $this->nodeId = (string) $nodeId;
  53         }
  54
  55         /**
  56          * Getter for node id
  57          *
  58          * @return      $nodeId         Our new node id
  59          */
  60         private final function getNodeId () {
  61                 return $this->nodeId;
  62         }
  63
  64         /**
  65          * Method to aquire a hub-id. On first run this generates a new one
  66          * based on many pseudo-random data. On any later run, unless the id
  67          * got not removed from database, it will be restored from the database.
  68          *
  69          * @param       $requestInstance        An instance of a Requestable class
  70          * @return      void
  71          */
  72         public function aquireHubId (Requestable $requestInstance) {
  73                 // Get a wrapper instance
  74                 $wrapperInstance = ObjectFactory::createObjectByConfiguredName('node_info_db_wrapper_class');
  75
  76                 // Now get a search criteria instance
  77                 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
  78
  79                 // Search for the node number zero which is hard-coded the default
  80                 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_NR, 1);
  81                 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_TYPE, $this->__toString());
  82                 $searchInstance->setLimit(1);
  83
  84                 // Get a result back
  85                 $resultInstance = $wrapperInstance->doSelectByCriteria($searchInstance);
  86
  87                 // Is it valid?
  88                 if ($resultInstance->next()) {
  89                         // Save the result instance in this class
  90                         $this->setResultInstance($resultInstance);
  91
  92                         // Get the node id from result and set it
  93                         $this->setNodeId($this->getField(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_ID));
  94                 } else {
  95                         // Get an RNG instance (Random Number Generator)
  96                         $rngInstance = ObjectFactory::createObjectByConfiguredName('rng_class');
  97
  98                         // Generate a pseudo-random string
  99                         $randomString = $rngInstance->randomString(255);
 100
 101                         // Get a crypto instance
 102                         $cryptoInstance = ObjectFactory::createObjectByConfiguredName('crypto_class');
 103
 104                         // Hash and encrypt the string so we become a "node id" aka Hub-Id
 105                         $this->setNodeId($cryptoInstance->hashString($cryptoInstance->encryptString($randomString)));
 106
 107                         // Register the node id with our wrapper
 108                         $wrapperInstance->registerNodeId($this);
 109                 }
 110         }
 111
 112         /**
 113          * Adds registration elements to a given dataset instance
 114          *
 115          * @param       $criteriaInstance       An instance of a storeable criteria
 116          * @return      void
 117          */
 118         public function addElementsToDataSet (StoreableCriteria $criteriaInstance) {
 119                 // Add node number and type
 120                 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_NR, 1);
 121                 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_TYPE, $this->__toString());
 122
 123                 // Add the node id
 124                 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_ID, $this->getNodeId());
 125         }
 126
 127         /**
 128          * Updates a given field with new value
 129          *
 130          * @param       $fieldName              Field to update
 131          * @param       $fieldValue             New value to store
 132          * @return      void
 133          * @throws      DatabaseUpdateSupportException  If this class does not support database updates
 134          * @todo        Try to make this method more generic so we can move it in BaseFrameworkSystem
 135          */
 136         public function updateDatabaseField ($fieldName, $fieldValue) {
 137                 // Unfinished
 138                 $this->partialStub("Unfinished!");
 139                 return;
 140
 141                 // Get a critieria instance
 142                 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
 143
 144                 // Add search criteria
 145                 $searchInstance->addCriteria(UserDatabaseWrapper::DB_COLUMN_USERNAME, $this->getUserName());
 146                 $searchInstance->setLimit(1);
 147
 148                 // Now get another criteria
 149                 $updateInstance = ObjectFactory::createObjectByConfiguredName('update_criteria_class');
 150
 151                 // Add criteria entry which we shall update
 152                 $updateInstance->addCriteria($fieldName, $fieldValue);
 153
 154                 // Add the search criteria for searching for the right entry
 155                 $updateInstance->setSearchInstance($searchInstance);
 156
 157                 // Set wrapper class name
 158                 $updateInstance->setWrapperConfigEntry('user_db_wrapper_class');
 159
 160                 // Remember the update in database result
 161                 $this->getResultInstance()->add2UpdateQueue($updateInstance);
 162         }
 163 }
 164
 165 // [EOF]
 166 ?>