framework/main/classes/resolver/controller/class_BaseControllerResolver.php

   1 <?php
   2 // Own namespace
   3 namespace Org\Mxchange\CoreFramework\Resolver\Controller;
   4
   5 // Import framework stuff
   6 use Org\Mxchange\CoreFramework\Controller\Controller;
   7 use Org\Mxchange\CoreFramework\Controller\DefaultControllerException;
   8 use Org\Mxchange\CoreFramework\Controller\InvalidControllerException;
   9 use Org\Mxchange\CoreFramework\Factory\ObjectFactory;
  10 use Org\Mxchange\CoreFramework\Registry\GenericRegistry;
  11 use Org\Mxchange\CoreFramework\Resolver\BaseResolver;
  12 use Org\Mxchange\CoreFramework\Resolver\Controller\ControllerResolver;
  13
  14 // Import SPL stuff
  15 use \InvalidArgumentException;
  16
  17 /**
  18  * A generic controller resolver class
  19  *
  20  * @author              Roland Haeder <webmaster@shipsimu.org>
  21  * @version             0.0.0
  22  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 Core Developer Team
  23  * @license             GNU GPL 3.0 or any newer version
  24  * @link                http://www.shipsimu.org
  25  *
  26  * This program is free software: you can redistribute it and/or modify
  27  * it under the terms of the GNU General Public License as published by
  28  * the Free Software Foundation, either version 3 of the License, or
  29  * (at your option) any later version.
  30  *
  31  * This program is distributed in the hope that it will be useful,
  32  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  33  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  34  * GNU General Public License for more details.
  35  *
  36  * You should have received a copy of the GNU General Public License
  37  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  38  */
  39 abstract class BaseControllerResolver extends BaseResolver {
  40         /**
  41          * Protected constructor
  42          *
  43          * @param       $className      Name of the real class
  44          * @return      void
  45          */
  46         protected function __construct ($className) {
  47                 // Call parent constructor
  48                 parent::__construct($className);
  49         }
  50
  51         /**
  52          * "Loads" a given controller and instances it if not yet cached. If the
  53          * controller was not found one of the default controllers will be used
  54          * depending on whether news shall be displayed.
  55          *
  56          * @param       $controllerName                 A controller name we shall look for
  57          * @return      $controllerInstance             A loaded controller instance
  58          * @throws      InvalidControllerException      Thrown if even the requested
  59          *                                                                              controller class is missing (bad!)
  60          */
  61         protected function loadController ($controllerName) {
  62                 // Cache default controller
  63                 $defaultController = $this->getConfigInstance()->getConfigEntry('default_' . strtolower($this->getClassPrefix()) . '_controller');
  64
  65                 // Init controller instance
  66                 $controllerInstance = NULL;
  67
  68                 // Create full class name
  69                 $className = sprintf(
  70                         '%s\%sDefaultNewsController',
  71                         $this->getNamespace(),
  72                         $this->getCapitalizedClassPrefix()
  73                 );
  74
  75                 // Default controller
  76                 $this->setClassName($className);
  77
  78                 // Generate the class name
  79                 //* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BEFORE: controller=' . $controllerName);
  80                 if ($controllerName != $defaultController) {
  81                         // Create controller class name
  82                         $className = sprintf(
  83                                 '%s\%s%sController',
  84                                 $this->getNamespace(),
  85                                 $this->getCapitalizedClassPrefix(),
  86                                 self::convertToClassName($controllerName)
  87                         );
  88
  89                         // ... and set it
  90                         $this->setClassName($className);
  91                 } else {
  92                         // No news at main controller or non-news controller
  93                         $this->setClassName($className);
  94                 }
  95                 //* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('AFTER: controller=' . $this->getClassName());
  96
  97                 // Is this class loaded?
  98                 if (!class_exists($this->getClassName())) {
  99                         // Throw an exception here
 100                         throw new InvalidControllerException(array($this, $controllerName), self::EXCEPTION_INVALID_CONTROLLER);
 101                 } // END - if
 102
 103                 // Set default resolver config name
 104                 $resolverConfigEntry = '';
 105
 106                 // Try to read a config entry for our resolver including controller name... ;-)
 107                 $resolverConfigEntry = sprintf('%s_cmd_%s_resolver_class', strtolower($this->getClassPrefix()), strtolower($controllerName));
 108
 109                 // Get the config, this will throw an exception if there is no special controller resolver
 110                 $resolverClass = $this->getConfigInstance()->getConfigEntry($resolverConfigEntry);
 111
 112                 // Initiate the resolver and controller
 113                 $resolverInstance = ObjectFactory::createObjectByConfiguredName(
 114                         $resolverConfigEntry,
 115                         array(
 116                                 $controllerName,
 117                                 GenericRegistry::getRegistry()->getInstance('application')
 118                         )
 119                 );
 120                 $controllerInstance = ObjectFactory::createObjectByName(
 121                         $this->getClassName(),
 122                         array($resolverInstance)
 123                 );
 124
 125                 // Return the result
 126                 return $controllerInstance;
 127         }
 128
 129         /**
 130          * Checks whether the given controller is valid
 131          *
 132          * @param       $namespace                      Namespace to look in, no trailing backslash
 133          * @param       $controllerName         The default controller we shall execute
 134          * @return      $isValid                        Whether the given controller is valid
 135          * @throws      InvalidArgumentException                Thrown if given controller is not set
 136          * @throws      DefaultControllerException      Thrown if default controller was not found
 137          */
 138         protected function isControllerValid ($namespace, $controllerName) {
 139                 // By default nothing shall be valid
 140                 $isValid = false;
 141
 142                 // Is namespace and controller name set?
 143                 if (empty($namespace)) {
 144                         // Then thrown an exception here
 145                         throw new InvalidArgumentException('Parameter "namespace" is empty');
 146                 } elseif (empty($controllerName)) {
 147                         // Then thrown an exception here
 148                         throw new InvalidArgumentException('Parameter "controllerName" is empty');
 149                 }
 150
 151                 // Create class name
 152                 $className = sprintf(
 153                         '%s\%sController',
 154                         $namespace,
 155                         $this->getCapitalizedClassPrefix() . self::convertToClassName($controllerName)
 156                 );
 157                 $newsControllerName = sprintf(
 158                         '%s\%sDefaultNewsController',
 159                         $namespace,
 160                         $this->getCapitalizedClassPrefix()
 161                 );
 162
 163                 // Debug message
 164                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('className=%s', $className));
 165
 166                 // Now, let us create the full name of the controller class
 167                 $this->setClassName($className);
 168
 169                 // Try it hard to get an controller
 170                 while ($isValid === false) {
 171                         // Is this class already loaded?
 172                         if (class_exists($this->getClassName())) {
 173                                 // This class does exist. :-)
 174                                 $isValid = true;
 175                         } elseif ($this->getClassName() != $newsControllerName) {
 176                                 // Set default controller
 177                                 $this->setClassName($newsControllerName);
 178                         } else {
 179                                 // All is tried, give it up here
 180                                 throw new DefaultControllerException($this, self::EXCEPTION_DEFAULT_CONTROLLER_GONE);
 181                         }
 182                 } // END - while
 183
 184                 // Return the result
 185                 return $isValid;
 186         }
 187
 188         /**
 189          * Resolves the default controller of the given controller
 190          *
 191          * @return      $controllerInstance             A controller instance for the default
 192          *                                                                      controller
 193          * @throws      InvalidControllerInstanceException      Thrown if $controllerInstance
 194          *                                                                                              is invalid
 195          */
 196         public function resolveController () {
 197                 // Init variables
 198                 $controllerName = '';
 199                 $controllerInstance = NULL;
 200
 201                 // Get namespace and controller name
 202                 $controllerName = $this->getControllerName();
 203
 204                 // Get the controller
 205                 $controllerInstance = $this->loadController($controllerName);
 206
 207                 // And validate it
 208                 if ((!is_object($controllerInstance)) || (!$controllerInstance instanceof Controller)) {
 209                         // This controller has an invalid instance!
 210                         throw new InvalidControllerInstanceException(array($this, $controllerName), self::EXCEPTION_INVALID_CONTROLLER);
 211                 } // END - if
 212
 213                 // Set last controller
 214                 $this->setResolvedInstance($controllerInstance);
 215
 216                 // Return the maybe resolved instance
 217                 return $controllerInstance;
 218         }
 219
 220 }