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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Service_WindowsAzure
  * @subpackage Diagnostics
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance
  */
 // require_once 'Zend/Service/WindowsAzure/Diagnostics/ConfigurationInstance.php';
 
 /**
  * @category   Zend
  * @package    Zend_Service_WindowsAzure
  * @subpackage Diagnostics
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Service_WindowsAzure_Diagnostics_Manager
 {
   /**
    * Blob storage client
    * 
    * @var Zend_Service_WindowsAzure_Storage_Blob
    */
   protected $_blobStorageClient = null;
   
   /**
    * Control container name
    * 
    * @var string
    */
   protected $_controlContainer = '';
 
   /**
    * Create a new instance of Zend_Service_WindowsAzure_Diagnostics_Manager
    * 
    * @param Zend_Service_WindowsAzure_Storage_Blob $blobStorageClient Blob storage client
    * @param string $controlContainer Control container name
    */
   public function __construct(Zend_Service_WindowsAzure_Storage_Blob $blobStorageClient = null, $controlContainer = 'wad-control-container')
   {
     $this->_blobStorageClient = $blobStorageClient;
     $this->_controlContainer = $controlContainer;
 
     $this->_ensureStorageInitialized();
   }
 
   /**
    * Ensure storage has been initialized
    */
   protected function _ensureStorageInitialized()
   {
     if (!$this->_blobStorageClient->containerExists($this->_controlContainer)) {
       $this->_blobStorageClient->createContainer($this->_controlContainer);
     }
   }
   
   /**
    * Get default configuration values
    * 
    * @return Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance
    */
   public function getDefaultConfiguration()
   {
     return new Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance();
   }
   
   /**
    * Checks if a configuration for a specific role instance exists.
    * 
    * @param string $roleInstance Role instance name, can be found in $_SERVER['RdRoleId'] when hosted on Windows Azure.
    * @return boolean
    * @throws Zend_Service_WindowsAzure_Diagnostics_Exception
    */
   public function configurationForRoleInstanceExists($roleInstance = null)
   {
     if (is_null($roleInstance)) {
       // require_once 'Zend/Service/WindowsAzure/Diagnostics/Exception.php';
       throw new Zend_Service_WindowsAzure_Diagnostics_Exception('Role instance should be specified. Try reading $_SERVER[\'RdRoleId\'] for this information if the application is hosted on Windows Azure Fabric or Development Fabric.');
     }
 
     return $this->_blobStorageClient->blobExists($this->_controlContainer, $roleInstance);
   }
   
   /**
    * Checks if a configuration for current role instance exists. Only works on Development Fabric or Windows Azure Fabric.
    * 
    * @return boolean
    * @throws Zend_Service_WindowsAzure_Diagnostics_Exception
    */
   public function configurationForCurrentRoleInstanceExists()
   {
     if (!isset($_SERVER['RdRoleId'])) {
       // require_once 'Zend/Service/WindowsAzure/Diagnostics/Exception.php';
       throw new Zend_Service_WindowsAzure_Diagnostics_Exception('Server variable \'RdRoleId\' is unknown. Please verify the application is running in Development Fabric or Windows Azure Fabric.');
     }
 
     return $this->_blobStorageClient->blobExists($this->_controlContainer, $this->_getCurrentRoleInstanceId());
   }
   
   /**
    * Get configuration for current role instance. Only works on Development Fabric or Windows Azure Fabric.
    * 
    * @return Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance
    * @throws Zend_Service_WindowsAzure_Diagnostics_Exception
    */
   public function getConfigurationForCurrentRoleInstance()
   {
     if (!isset($_SERVER['RdRoleId'])) {
       // require_once 'Zend/Service/WindowsAzure/Diagnostics/Exception.php';
       throw new Zend_Service_WindowsAzure_Diagnostics_Exception('Server variable \'RdRoleId\' is unknown. Please verify the application is running in Development Fabric or Windows Azure Fabric.');
     }
     return $this->getConfigurationForRoleInstance($this->_getCurrentRoleInstanceId());
   }
   
   /**
    * Get the current role instance ID. Only works on Development Fabric or Windows Azure Fabric.
    * 
    * @return string
    * @throws Zend_Service_WindowsAzure_Diagnostics_Exception
    */
   protected function _getCurrentRoleInstanceId()
   {
     if (!isset($_SERVER['RdRoleId'])) {
       // require_once 'Zend/Service/WindowsAzure/Diagnostics/Exception.php';
       throw new Zend_Service_WindowsAzure_Diagnostics_Exception('Server variable \'RdRoleId\' is unknown. Please verify the application is running in Development Fabric or Windows Azure Fabric.');
     }
     
     if (strpos($_SERVER['RdRoleId'], 'deployment(') === false) {
       return $_SERVER['RdRoleId'];
     } else {
       $roleIdParts = explode('.', $_SERVER['RdRoleId']);
       return $roleIdParts[0] . '/' . $roleIdParts[2] . '/' . $_SERVER['RdRoleId'];
     }
 
     if (!isset($_SERVER['RoleDeploymentID']) && !isset($_SERVER['RoleInstanceID']) && !isset($_SERVER['RoleName'])) {
       throw new Exception('Server variables \'RoleDeploymentID\', \'RoleInstanceID\' and \'RoleName\' are unknown. Please verify the application is running in Development Fabric or Windows Azure Fabric.');
     }
     
     if (strpos($_SERVER['RdRoleId'], 'deployment(') === false) {
       return $_SERVER['RdRoleId'];
     } else {
       return $_SERVER['RoleDeploymentID'] . '/' . $_SERVER['RoleInstanceID'] . '/' . $_SERVER['RoleName'];
     }
   }
   
   /**
    * Set configuration for current role instance. Only works on Development Fabric or Windows Azure Fabric.
    * 
    * @param Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance $configuration Configuration to apply
    * @throws Zend_Service_WindowsAzure_Diagnostics_Exception
    */
   public function setConfigurationForCurrentRoleInstance(Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance $configuration)
   {
     if (!isset($_SERVER['RdRoleId'])) {
       // require_once 'Zend/Service/WindowsAzure/Diagnostics/Exception.php';
       throw new Zend_Service_WindowsAzure_Diagnostics_Exception('Server variable \'RdRoleId\' is unknown. Please verify the application is running in Development Fabric or Windows Azure Fabric.');
     }
     
     $this->setConfigurationForRoleInstance($this->_getCurrentRoleInstanceId(), $configuration);
   }
   
   /**
    * Get configuration for a specific role instance
    * 
    * @param string $roleInstance Role instance name, can be found in $_SERVER['RdRoleId'] when hosted on Windows Azure.
    * @return Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance
    * @throws Zend_Service_WindowsAzure_Diagnostics_Exception
    */
   public function getConfigurationForRoleInstance($roleInstance = null)
   {
     if (is_null($roleInstance)) {
       // require_once 'Zend/Service/WindowsAzure/Diagnostics/Exception.php';
       throw new Zend_Service_WindowsAzure_Diagnostics_Exception('Role instance should be specified. Try reading $_SERVER[\'RdRoleId\'] for this information if the application is hosted on Windows Azure Fabric or Development Fabric.');
     }
 
     
     
     if ($this->_blobStorageClient->blobExists($this->_controlContainer, $roleInstance)) {
       $configurationInstance = new Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance();
       $configurationInstance->loadXml( $this->_blobStorageClient->getBlobData($this->_controlContainer, $roleInstance) );
       return $configurationInstance;
     }
 
     return new Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance();
   }
   
   /**
    * Set configuration for a specific role instance
    * 
    * @param string $roleInstance Role instance name, can be found in $_SERVER['RdRoleId'] when hosted on Windows Azure.
    * @param Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance $configuration Configuration to apply
    * @throws Zend_Service_WindowsAzure_Diagnostics_Exception
    */
   public function setConfigurationForRoleInstance($roleInstance = null, Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance $configuration)
   {
     if (is_null($roleInstance)) {
       // require_once 'Zend/Service/WindowsAzure/Diagnostics/Exception.php';
       throw new Zend_Service_WindowsAzure_Diagnostics_Exception('Role instance should be specified. Try reading $_SERVER[\'RdRoleId\'] for this information if the application is hosted on Windows Azure Fabric or Development Fabric.');
     }
 
     $this->_blobStorageClient->putBlobData($this->_controlContainer, $roleInstance, $configuration->toXml(), array(), null, array('Content-Type' => 'text/xml'));
   }
 }