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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_Application
  * @subpackage Bootstrap
  * @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_Application_Bootstrap_Bootstrapper
  */
 // require_once 'Zend/Application/Bootstrap/Bootstrapper.php';
 
 /**
  * @see Zend_Application_Bootstrap_ResourceBootstrapper
  */
 // require_once 'Zend/Application/Bootstrap/ResourceBootstrapper.php';
 
 /**
  * Abstract base class for bootstrap classes
  *
  * @uses       Zend_Application_Bootstrap_Bootstrapper
  * @uses       Zend_Application_Bootstrap_ResourceBootstrapper
  * @category   Zend
  * @package    Zend_Application
  * @subpackage Bootstrap
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 abstract class Zend_Application_Bootstrap_BootstrapAbstract
     implements Zend_Application_Bootstrap_Bootstrapper,
                Zend_Application_Bootstrap_ResourceBootstrapper
 {
     /**
      * @var Zend_Application|Zend_Application_Bootstrap_Bootstrapper
      */
     protected $_application;
 
     /**
      * @var array Internal resource methods (resource/method pairs)
      */
     protected $_classResources;
 
     /**
      * @var object Resource container
      */
     protected $_container;
 
     /**
      * @var string
      */
     protected $_environment;
 
     /**
      * Flattened (lowercase) option keys used for lookups
      *
      * @var array
      */
     protected $_optionKeys = array();
 
     /**
      * @var array
      */
     protected $_options = array();
 
     /**
      * @var Zend_Loader_PluginLoader_Interface
      */
     protected $_pluginLoader;
 
     /**
      * @var array Class-based resource plugins
      */
     protected $_pluginResources = array();
 
     /**
      * @var array Initializers that have been run
      */
     protected $_run = array();
 
     /**
      * @var array Initializers that have been started but not yet completed (circular dependency detection)
      */
     protected $_started = array();
 
     /**
      * Constructor
      *
      * Sets application object, initializes options, and prepares list of
      * initializer methods.
      *
      * @param  Zend_Application|Zend_Application_Bootstrap_Bootstrapper $application
      * @throws Zend_Application_Bootstrap_Exception When invalid application is provided
      */
     public function __construct($application)
     {
         $this->setApplication($application);
         $options = $application->getOptions();
         $this->setOptions($options);
     }
 
     /**
      * Set class state
      *
      * @param  array $options
      * @return Zend_Application_Bootstrap_BootstrapAbstract
      */
     public function setOptions(array $options)
     {
         $this->_options = $this->mergeOptions($this->_options, $options);
 
         $options = array_change_key_case($options, CASE_LOWER);
         $this->_optionKeys = array_merge($this->_optionKeys, array_keys($options));
 
         $methods = get_class_methods($this);
         foreach ($methods as $key => $method) {
             $methods[$key] = strtolower($method);
         }
 
         if (array_key_exists('pluginpaths', $options)) {
             $pluginLoader = $this->getPluginLoader();
 
             foreach ($options['pluginpaths'] as $prefix => $path) {
                 $pluginLoader->addPrefixPath($prefix, $path);
             }
             unset($options['pluginpaths']);
         }
 
         foreach ($options as $key => $value) {
             $method = 'set' . strtolower($key);
 
             if (in_array($method, $methods)) {
                 $this->$method($value);
             } elseif ('resources' == $key) {
                 foreach ($value as $resource => $resourceOptions) {
                     $this->registerPluginResource($resource, $resourceOptions);
                 }
             }
         }
         return $this;
     }
 
     /**
      * Get current options from bootstrap
      *
      * @return array
      */
     public function getOptions()
     {
         return $this->_options;
     }
 
     /**
      * Is an option present?
      *
      * @param  string $key
      * @return bool
      */
     public function hasOption($key)
     {
         return in_array(strtolower($key), $this->_optionKeys);
     }
 
     /**
      * Retrieve a single option
      *
      * @param  string $key
      * @return mixed
      */
     public function getOption($key)
     {
         if ($this->hasOption($key)) {
             $options = $this->getOptions();
             $options = array_change_key_case($options, CASE_LOWER);
             return $options[strtolower($key)];
         }
         return null;
     }
 
     /**
      * Merge options recursively
      *
      * @param  array $array1
      * @param  mixed $array2
      * @return array
      */
     public function mergeOptions(array $array1, $array2 = null)
     {
         if (is_array($array2)) {
             foreach ($array2 as $key => $val) {
                 if (is_array($array2[$key])) {
                     $array1[$key] = (array_key_exists($key, $array1) && is_array($array1[$key]))
                                   ? $this->mergeOptions($array1[$key], $array2[$key])
                                   : $array2[$key];
                 } else {
                     $array1[$key] = $val;
                 }
             }
         }
         return $array1;
     }
 
     /**
      * Get class resources (as resource/method pairs)
      *
      * Uses get_class_methods() by default, reflection on prior to 5.2.6,
      * as a bug prevents the usage of get_class_methods() there.
      *
      * @return array
      */
     public function getClassResources()
     {
         if (null === $this->_classResources) {
             if (version_compare(PHP_VERSION, '5.2.6') === -1) {
                 $class        = new ReflectionObject($this);
                 $classMethods = $class->getMethods();
                 $methodNames  = array();
 
                 foreach ($classMethods as $method) {
                     $methodNames[] = $method->getName();
                 }
             } else {
                 $methodNames = get_class_methods($this);
             }
 
             $this->_classResources = array();
             foreach ($methodNames as $method) {
                 if (5 < strlen($method) && '_init' === substr($method, 0, 5)) {
                     $this->_classResources[strtolower(substr($method, 5))] = $method;
                 }
             }
         }
 
         return $this->_classResources;
     }
 
     /**
      * Get class resource names
      *
      * @return array
      */
     public function getClassResourceNames()
     {
         $resources = $this->getClassResources();
         return array_keys($resources);
     }
 
     /**
      * Register a new resource plugin
      *
      * @param  string|Zend_Application_Resource_Resource $resource
      * @param  mixed  $options
      * @return Zend_Application_Bootstrap_BootstrapAbstract
      * @throws Zend_Application_Bootstrap_Exception When invalid resource is provided
      */
     public function registerPluginResource($resource, $options = null)
     {
         if ($resource instanceof Zend_Application_Resource_Resource) {
             $resource->setBootstrap($this);
             $pluginName = $this->_resolvePluginResourceName($resource);
             $this->_pluginResources[$pluginName] = $resource;
             return $this;
         }
 
         if (!is_string($resource)) {
             throw new Zend_Application_Bootstrap_Exception('Invalid resource provided to ' . __METHOD__);
         }
 
         $this->_pluginResources[$resource] = $options;
         return $this;
     }
 
     /**
      * Unregister a resource from the bootstrap
      *
      * @param  string|Zend_Application_Resource_Resource $resource
      * @return Zend_Application_Bootstrap_BootstrapAbstract
      * @throws Zend_Application_Bootstrap_Exception When unknown resource type is provided
      */
     public function unregisterPluginResource($resource)
     {
         if ($resource instanceof Zend_Application_Resource_Resource) {
             if ($index = array_search($resource, $this->_pluginResources, true)) {
                 unset($this->_pluginResources[$index]);
             }
             return $this;
         }
 
         if (!is_string($resource)) {
             throw new Zend_Application_Bootstrap_Exception('Unknown resource type provided to ' . __METHOD__);
         }
 
         $resource = strtolower($resource);
         if (array_key_exists($resource, $this->_pluginResources)) {
             unset($this->_pluginResources[$resource]);
         }
 
         return $this;
     }
 
     /**
      * Is the requested plugin resource registered?
      *
      * @param  string $resource
      * @return bool
      */
     public function hasPluginResource($resource)
     {
         return (null !== $this->getPluginResource($resource));
     }
 
     /**
      * Get a registered plugin resource
      *
      * @param string $resource
      * @return Zend_Application_Resource_Resource
      * @throws Zend_Application_Bootstrap_Exception
      */
     public function getPluginResource($resource)
     {
         if (array_key_exists(strtolower($resource), $this->_pluginResources)) {
             $resource = strtolower($resource);
             if (!$this->_pluginResources[$resource] instanceof Zend_Application_Resource_Resource) {
                 $resourceName = $this->_loadPluginResource($resource, $this->_pluginResources[$resource]);
                 if (!$resourceName) {
                     throw new Zend_Application_Bootstrap_Exception(sprintf('Unable to resolve plugin "%s"; no corresponding plugin with that name', $resource));
                 }
                 $resource = $resourceName;
             }
             return $this->_pluginResources[$resource];
         }
 
         foreach ($this->_pluginResources as $plugin => $spec) {
             if ($spec instanceof Zend_Application_Resource_Resource) {
                 $pluginName = $this->_resolvePluginResourceName($spec);
                 if (0 === strcasecmp($resource, $pluginName)) {
                     unset($this->_pluginResources[$plugin]);
                     $this->_pluginResources[$pluginName] = $spec;
                     return $spec;
                 }
                 continue;
             }
 
             if (false !== $pluginName = $this->_loadPluginResource($plugin, $spec)) {
                 if (0 === strcasecmp($resource, $pluginName)) {
                     return $this->_pluginResources[$pluginName];
                 }
                 continue;
             }
 
             if (class_exists($plugin)
             && is_subclass_of($plugin, 'Zend_Application_Resource_Resource')
             ) { //@SEE ZF-7550
                 $spec = (array) $spec;
                 $spec['bootstrap'] = $this;
                 $instance = new $plugin($spec);
                 $pluginName = $this->_resolvePluginResourceName($instance);
                 unset($this->_pluginResources[$plugin]);
                 $this->_pluginResources[$pluginName] = $instance;
 
                 if (0 === strcasecmp($resource, $pluginName)) {
                     return $instance;
                 }
             }
         }
 
         return null;
     }
 
     /**
      * Retrieve all plugin resources
      *
      * @return array
      */
     public function getPluginResources()
     {
         foreach (array_keys($this->_pluginResources) as $resource) {
             $this->getPluginResource($resource);
         }
         return $this->_pluginResources;
     }
 
     /**
      * Retrieve plugin resource names
      *
      * @return array
      */
     public function getPluginResourceNames()
     {
         $this->getPluginResources();
         return array_keys($this->_pluginResources);
     }
 
     /**
      * Set plugin loader for loading resources
      *
      * @param  Zend_Loader_PluginLoader_Interface $loader
      * @return Zend_Application_Bootstrap_BootstrapAbstract
      */
     public function setPluginLoader(Zend_Loader_PluginLoader_Interface $loader)
     {
         $this->_pluginLoader = $loader;
         return $this;
     }
 
     /**
      * Get the plugin loader for resources
      *
      * @return Zend_Loader_PluginLoader_Interface
      */
     public function getPluginLoader()
     {
         if ($this->_pluginLoader === null) {
             $options = array(
                 'Zend_Application_Resource'  => 'Zend/Application/Resource',
                 'ZendX_Application_Resource' => 'ZendX/Application/Resource'
             );
 
             $this->_pluginLoader = new Zend_Loader_PluginLoader($options);
         }
 
         return $this->_pluginLoader;
     }
 
     /**
      * Set application/parent bootstrap
      *
      * @param  Zend_Application|Zend_Application_Bootstrap_Bootstrapper $application
      * @return Zend_Application_Bootstrap_BootstrapAbstract
      * @throws Zend_Application_Bootstrap_Exception
      */
     public function setApplication($application)
     {
         if (($application instanceof Zend_Application)
             || ($application instanceof Zend_Application_Bootstrap_Bootstrapper)
         ) {
             if ($application === $this) {
                 throw new Zend_Application_Bootstrap_Exception('Cannot set application to same object; creates recursion');
             }
             $this->_application = $application;
         } else {
             throw new Zend_Application_Bootstrap_Exception('Invalid application provided to bootstrap constructor (received "' . get_class($application) . '" instance)');
         }
         return $this;
     }
 
     /**
      * Retrieve parent application instance
      *
      * @return Zend_Application|Zend_Application_Bootstrap_Bootstrapper
      */
     public function getApplication()
     {
         return $this->_application;
     }
 
     /**
      * Retrieve application environment
      *
      * @return string
      */
     public function getEnvironment()
     {
         if (null === $this->_environment) {
             $this->_environment = $this->getApplication()->getEnvironment();
         }
         return $this->_environment;
     }
 
     /**
      * Set resource container
      *
      * By default, if a resource callback has a non-null return value, this
      * value will be stored in a container using the resource name as the
      * key.
      *
      * Containers must be objects, and must allow setting public properties.
      *
      * @param  object $container
      * @return Zend_Application_Bootstrap_BootstrapAbstract
      * @throws Zend_Application_Bootstrap_Exception
      */
     public function setContainer($container)
     {
         if (!is_object($container)) {
             throw new Zend_Application_Bootstrap_Exception('Resource containers must be objects');
         }
         $this->_container = $container;
         return $this;
     }
 
     /**
      * Retrieve resource container
      *
      * @return object
      */
     public function getContainer()
     {
         if (null === $this->_container) {
             $this->setContainer(new Zend_Registry());
         }
         return $this->_container;
     }
 
     /**
      * Determine if a resource has been stored in the container
      *
      * During bootstrap resource initialization, you may return a value. If
      * you do, it will be stored in the {@link setContainer() container}.
      * You can use this method to determine if a value was stored.
      *
      * @param  string $name
      * @return bool
      */
     public function hasResource($name)
     {
         $resource  = strtolower($name);
         $container = $this->getContainer();
         return isset($container->{$resource});
     }
 
     /**
      * Retrieve a resource from the container
      *
      * During bootstrap resource initialization, you may return a value. If
      * you do, it will be stored in the {@link setContainer() container}.
      * You can use this method to retrieve that value.
      *
      * If no value was returned, this will return a null value.
      *
      * @param  string $name
      * @return null|mixed
      */
     public function getResource($name)
     {
         $resource  = strtolower($name);
         $container = $this->getContainer();
         if ($this->hasResource($resource)) {
             return $container->{$resource};
         }
         return null;
     }
 
     /**
      * Implement PHP's magic to retrieve a resource
      * in the bootstrap
      *
      * @param string $prop
      * @return null|mixed
      */
     public function __get($prop)
     {
         return $this->getResource($prop);
     }
 
     /**
      * Implement PHP's magic to ask for the
      * existence of a resource in the bootstrap
      *
      * @param string $prop
      * @return bool
      */
     public function __isset($prop)
     {
         return $this->hasResource($prop);
     }
 
     /**
      * Bootstrap individual, all, or multiple resources
      *
      * Marked as final to prevent issues when subclassing and naming the
      * child class 'Bootstrap' (in which case, overriding this method
      * would result in it being treated as a constructor).
      *
      * If you need to override this functionality, override the
      * {@link _bootstrap()} method.
      *
      * @param  null|string|array $resource
      * @return Zend_Application_Bootstrap_BootstrapAbstract
      * @throws Zend_Application_Bootstrap_Exception When invalid argument was passed
      */
     final public function bootstrap($resource = null)
     {
         $this->_bootstrap($resource);
         return $this;
     }
 
     /**
      * Overloading: intercept calls to bootstrap<resourcename>() methods
      *
      * @param  string $method
      * @param  array  $args
      * @return Zend_Application_Bootstrap_BootstrapAbstract
      * @throws Zend_Application_Bootstrap_Exception On invalid method name
      */
     public function __call($method, $args)
     {
         if (9 < strlen($method) && 'bootstrap' === substr($method, 0, 9)) {
             $resource = substr($method, 9);
             return $this->bootstrap($resource);
         }
 
         throw new Zend_Application_Bootstrap_Exception('Invalid method "' . $method . '"');
     }
 
     /**
      * Bootstrap implementation
      *
      * This method may be overridden to provide custom bootstrapping logic.
      * It is the sole method called by {@link bootstrap()}.
      *
      * @param  null|string|array $resource
      * @return void
      * @throws Zend_Application_Bootstrap_Exception When invalid argument was passed
      */
     protected function _bootstrap($resource = null)
     {
         if (null === $resource) {
             foreach ($this->getClassResourceNames() as $resource) {
                 $this->_executeResource($resource);
             }
 
             foreach ($this->getPluginResourceNames() as $resource) {
                 $this->_executeResource($resource);
             }
         } elseif (is_string($resource)) {
             $this->_executeResource($resource);
         } elseif (is_array($resource)) {
             foreach ($resource as $r) {
                 $this->_executeResource($r);
             }
         } else {
             throw new Zend_Application_Bootstrap_Exception('Invalid argument passed to ' . __METHOD__);
         }
     }
 
     /**
      * Execute a resource
      *
      * Checks to see if the resource has already been run. If not, it searches
      * first to see if a local method matches the resource, and executes that.
      * If not, it checks to see if a plugin resource matches, and executes that
      * if found.
      *
      * Finally, if not found, it throws an exception.
      *
      * @param  string $resource
      * @return void
      * @throws Zend_Application_Bootstrap_Exception When resource not found
      */
     protected function _executeResource($resource)
     {
         $resourceName = strtolower($resource);
 
         if (in_array($resourceName, $this->_run)) {
             return;
         }
 
         if (isset($this->_started[$resourceName]) && $this->_started[$resourceName]) {
             throw new Zend_Application_Bootstrap_Exception('Circular resource dependency detected');
         }
 
         $classResources = $this->getClassResources();
         if (array_key_exists($resourceName, $classResources)) {
             $this->_started[$resourceName] = true;
             $method = $classResources[$resourceName];
             $return = $this->$method();
             unset($this->_started[$resourceName]);
             $this->_markRun($resourceName);
 
             if (null !== $return) {
                 $this->getContainer()->{$resourceName} = $return;
             }
 
             return;
         }
 
         if ($this->hasPluginResource($resource)) {
             $this->_started[$resourceName] = true;
             $plugin = $this->getPluginResource($resource);
             $return = $plugin->init();
             unset($this->_started[$resourceName]);
             $this->_markRun($resourceName);
 
             if (null !== $return) {
                 $this->getContainer()->{$resourceName} = $return;
             }
 
             return;
         }
 
         throw new Zend_Application_Bootstrap_Exception('Resource matching "' . $resource . '" not found');
     }
 
     /**
      * Load a plugin resource
      *
      * @param  string $resource
      * @param  array|object|null $options
      * @return string|false
      */
     protected function _loadPluginResource($resource, $options)
     {
         $options   = (array) $options;
         $options['bootstrap'] = $this;
         $className = $this->getPluginLoader()->load(strtolower($resource), false);
 
         if (!$className) {
             return false;
         }
 
         $instance = new $className($options);
 
         unset($this->_pluginResources[$resource]);
 
         if (isset($instance->_explicitType)) {
             $resource = $instance->_explicitType;
         }
         $resource = strtolower($resource);
         $this->_pluginResources[$resource] = $instance;
 
         return $resource;
     }
 
     /**
      * Mark a resource as having run
      *
      * @param  string $resource
      * @return void
      */
     protected function _markRun($resource)
     {
         if (!in_array($resource, $this->_run)) {
             $this->_run[] = $resource;
         }
     }
 
     /**
      * Resolve a plugin resource name
      *
      * Uses, in order of preference
      * - $_explicitType property of resource
      * - Short name of resource (if a matching prefix path is found)
      * - class name (if none of the above are true)
      *
      * The name is then cast to lowercase.
      *
      * @param  Zend_Application_Resource_Resource $resource
      * @return string
      */
     protected function _resolvePluginResourceName($resource)
     {
         if (isset($resource->_explicitType)) {
             $pluginName = $resource->_explicitType;
         } else  {
             $className  = get_class($resource);
             $pluginName = $className;
             $loader     = $this->getPluginLoader();
             foreach ($loader->getPaths() as $prefix => $paths) {
                 if (0 === strpos($className, $prefix)) {
                     $pluginName = substr($className, strlen($prefix));
                     $pluginName = trim($pluginName, '_');
                     break;
                 }
             }
         }
         $pluginName = strtolower($pluginName);
         return $pluginName;
     }
 }