+++ /dev/null
-<?php
-/**
- * A command resolver for local (non-hubbed) image commands
- *
- * @author Roland Haeder <webmaster@ship-simu.org>
- * @version 0.0.0
- * @copyright Copyright (c) 2007, 2008 Roland Haeder, this is free software
- * @license GNU GPL 3.0 or any newer version
- * @link http://www.ship-simu.org
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-class ImageCommandResolver extends BaseCommandResolver implements CommandResolver {
- /**
- * Last successfull resolved command
- */
- private $lastCommandInstance = null;
-
- /**
- * Protected constructor
- *
- * @return void
- */
- protected function __construct () {
- // Call parent constructor
- parent::__construct(__CLASS__);
-
- // Set prefix to "Image"
- $this->setCommandPrefix("Image");
- }
-
- /**
- * Creates an instance of a Image command resolver with a given default command
- *
- * @param $commandName The default command we shall execute
- * @param $appInstance An instance of a manageable application helper class
- * @return $resolverInstance The prepared command resolver instance
- * @throws EmptyVariableException Thrown if default command is not set
- * @throws InvalidCommandException Thrown if default command is invalid
- */
- public final static function createImageCommandResolver ($commandName, ManageableApplication $appInstance) {
- // Create the new instance
- $resolverInstance = new ImageCommandResolver();
-
- // Is the variable $commandName set and the command is valid?
- if (empty($commandName)) {
- // Then thrown an exception here
- throw new EmptyVariableException(array($resolverInstance, 'commandName'), self::EXCEPTION_UNEXPECTED_EMPTY_STRING);
- } elseif ($resolverInstance->isCommandValid($commandName) === false) {
- // Invalid command found
- throw new InvalidCommandException(array($resolverInstance, $commandName), self::EXCEPTION_INVALID_COMMAND);
- }
-
- // Set the application instance
- $resolverInstance->setApplicationInstance($appInstance);
-
- // Return the prepared instance
- return $resolverInstance;
- }
-
- /**
- * Returns an command instance for a given request class or null if
- * it was not found
- *
- * @param $requestInstance An instance of a request class
- * @return $commandInstance An instance of the resolved command
- * @throws InvalidCommandException Thrown if $commandName is
- * invalid
- * @throws InvalidCommandInstanceException Thrown if $commandInstance
- * is an invalid instance
- */
- public function resolveCommandByRequest (Requestable $requestInstance) {
- // Init variables
- $commandName = "";
- $commandInstance = null;
-
- // This goes fine so let's resolv the command
- $commandName = $requestInstance->getRequestElement('page');
-
- // Is the command empty? Then fall back to default command
- if (empty($commandName)) $commandName = $this->getConfigInstance()->readConfig('default_image_command');
-
- // Check if command is valid
- if ($this->isCommandValid($commandName) === false) {
- // This command is invalid!
- throw new InvalidCommandException(array($this, $commandName), self::EXCEPTION_INVALID_COMMAND);
- } // END - if
-
- // Get the command
- $commandInstance = $this->loadCommand($commandName);
-
- // And validate it
- if ((!is_object($commandInstance)) || (!$commandInstance instanceof Commandable)) {
- // This command has an invalid instance!
- throw new InvalidCommandInstanceException(array($this, $commandName), self::EXCEPTION_INVALID_COMMAND);
- } // END - if
-
- // Set last command
- $this->lastCommandInstance = $commandInstance;
-
- // Return the resolved command instance
- return $commandInstance;
- }
-
- /**
- * Resolves the command by its direct name and returns an instance of its class
- *
- * @param $commandName The direct command name we shall resolve
- * @return $commandInstance An instance of the command class
- * @throws InvalidCommandException Thrown if $commandName is invalid
- */
- public function resolveCommand ($commandName) {
- // Initiate the instance variable
- $commandInstance = null;
-
- // Is the command empty? Then fall back to default command
- if (empty($commandName)) $commandName = $this->getConfigInstance()->readConfig('default_image_command');
-
- // Check if command is valid
- if ($this->isCommandValid($commandName) === false) {
- // This command is invalid!
- throw new InvalidCommandException(array($this, $commandName), self::EXCEPTION_INVALID_COMMAND);
- }
-
- // Get the command
- $commandInstance = $this->loadCommand($commandName);
-
- // Return the instance
- return $commandInstance;
- }
-
- /**
- * "Loads" a given command and instances it if not yet cached
- *
- * @param $commandName A command name we shall look for
- * @return $commandInstance A loaded command instance
- * @throws InvalidCommandException Thrown if even the default
- * command class is missing (bad!)
- */
- private function loadCommand ($commandName) {
- // Cache default command
- $defaultCommand = $this->getConfigInstance()->readConfig('default_image_command');
-
- // Init command instance
- $commandInstance = null;
-
- // Create command class name
- $this->setClassName(sprintf("Image%sCommand",
- $this->convertToClassName($commandName)
- ));
-
- // Is this class loaded?
- if (!class_exists($this->getClassName())) {
- // Class not found, so throw an exception
- throw new InvalidCommandException(array($this, $defaultCommand), self::EXCEPTION_INVALID_COMMAND);
- } // END - if
-
- // Initiate the command
- $commandInstance = ObjectFactory::createObjectByName($this->getClassName(), array($this));
-
- // Return the result
- return $commandInstance;
- }
-}
-
-// [EOF]
-?>
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