Initial commit

Signed-off-by: Florian Pritz <bluewind@xssn.at>

1 files changed, 389 insertions, 0 deletions

diff --git a/system/libraries/Router.php b/system/libraries/Router.php
new file mode 100644
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--- /dev/null
+++ b/system/libraries/Router.php
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+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2009, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Router Class
+ *
+ * Parses URIs and determines routing
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @author		ExpressionEngine Dev Team
+ * @category	Libraries
+ * @link		http://codeigniter.com/user_guide/general/routing.html
+ */
+class CI_Router {
+
+	var $config;	
+	var $routes 		= array();
+	var $error_routes	= array();
+	var $class			= '';
+	var $method			= 'index';
+	var $directory		= '';
+	var $uri_protocol 	= 'auto';
+	var $default_controller;
+	var $scaffolding_request = FALSE; // Must be set to FALSE
+	
+	/**
+	 * Constructor
+	 *
+	 * Runs the route mapping function.
+	 */
+	function CI_Router()
+	{
+		$this->config =& load_class('Config');
+		$this->uri =& load_class('URI');
+		$this->_set_routing();
+		log_message('debug', "Router Class Initialized");
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Set the route mapping
+	 *
+	 * This function determines what should be served based on the URI request,
+	 * as well as any "routes" that have been set in the routing config file.
+	 *
+	 * @access	private
+	 * @return	void
+	 */
+	function _set_routing()
+	{
+		// Are query strings enabled in the config file?
+		// If so, we're done since segment based URIs are not used with query strings.
+		if ($this->config->item('enable_query_strings') === TRUE AND isset($_GET[$this->config->item('controller_trigger')]))
+		{
+			$this->set_class(trim($this->uri->_filter_uri($_GET[$this->config->item('controller_trigger')])));
+
+			if (isset($_GET[$this->config->item('function_trigger')]))
+			{
+				$this->set_method(trim($this->uri->_filter_uri($_GET[$this->config->item('function_trigger')])));
+			}
+			
+			return;
+		}
+		
+		// Load the routes.php file.
+		@include(APPPATH.'config/routes'.EXT);
+		$this->routes = ( ! isset($route) OR ! is_array($route)) ? array() : $route;
+		unset($route);
+
+		// Set the default controller so we can display it in the event
+		// the URI doesn't correlated to a valid controller.
+		$this->default_controller = ( ! isset($this->routes['default_controller']) OR $this->routes['default_controller'] == '') ? FALSE : strtolower($this->routes['default_controller']);	
+		
+		// Fetch the complete URI string
+		$this->uri->_fetch_uri_string();
+	
+		// Is there a URI string? If not, the default controller specified in the "routes" file will be shown.
+		if ($this->uri->uri_string == '')
+		{
+			if ($this->default_controller === FALSE)
+			{
+				show_error("Unable to determine what should be displayed. A default route has not been specified in the routing file.");
+			}
+			
+			if (strpos($this->default_controller, '/') !== FALSE)
+			{
+				$x = explode('/', $this->default_controller);
+
+				$this->set_class(end($x));
+				$this->set_method('index');
+				$this->_set_request($x);
+			}
+			else
+			{
+				$this->set_class($this->default_controller);
+				$this->set_method('index');
+				$this->_set_request(array($this->default_controller, 'index'));
+			}
+
+			// re-index the routed segments array so it starts with 1 rather than 0
+			$this->uri->_reindex_segments();
+			
+			log_message('debug', "No URI present. Default controller set.");
+			return;
+		}
+		unset($this->routes['default_controller']);
+		
+		// Do we need to remove the URL suffix?
+		$this->uri->_remove_url_suffix();
+		
+		// Compile the segments into an array
+		$this->uri->_explode_segments();
+		
+		// Parse any custom routing that may exist
+		$this->_parse_routes();		
+		
+		// Re-index the segment array so that it starts with 1 rather than 0
+		$this->uri->_reindex_segments();
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Set the Route
+	 *
+	 * This function takes an array of URI segments as
+	 * input, and sets the current class/method
+	 *
+	 * @access	private
+	 * @param	array
+	 * @param	bool
+	 * @return	void
+	 */
+	function _set_request($segments = array())
+	{
+		$segments = $this->_validate_request($segments);
+		
+		if (count($segments) == 0)
+		{
+			return;
+		}
+						
+		$this->set_class($segments[0]);
+		
+		if (isset($segments[1]))
+		{
+			// A scaffolding request. No funny business with the URL
+			if ($this->routes['scaffolding_trigger'] == $segments[1] AND $segments[1] != '_ci_scaffolding')
+			{
+				$this->scaffolding_request = TRUE;
+				unset($this->routes['scaffolding_trigger']);
+			}
+			else
+			{
+				// A standard method request
+				$this->set_method($segments[1]);
+			}
+		}
+		else
+		{
+			// This lets the "routed" segment array identify that the default
+			// index method is being used.
+			$segments[1] = 'index';
+		}
+		
+		// Update our "routed" segment array to contain the segments.
+		// Note: If there is no custom routing, this array will be
+		// identical to $this->uri->segments
+		$this->uri->rsegments = $segments;
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Validates the supplied segments.  Attempts to determine the path to
+	 * the controller.
+	 *
+	 * @access	private
+	 * @param	array
+	 * @return	array
+	 */	
+	function _validate_request($segments)
+	{
+		// Does the requested controller exist in the root folder?
+		if (file_exists(APPPATH.'controllers/'.$segments[0].EXT))
+		{
+			return $segments;
+		}
+
+		// Is the controller in a sub-folder?
+		if (is_dir(APPPATH.'controllers/'.$segments[0]))
+		{		
+			// Set the directory and remove it from the segment array
+			$this->set_directory($segments[0]);
+			$segments = array_slice($segments, 1);
+			
+			if (count($segments) > 0)
+			{
+				// Does the requested controller exist in the sub-folder?
+				if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$segments[0].EXT))
+				{
+					show_404($this->fetch_directory().$segments[0]);
+				}
+			}
+			else
+			{
+				$this->set_class($this->default_controller);
+				$this->set_method('index');
+			
+				// Does the default controller exist in the sub-folder?
+				if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$this->default_controller.EXT))
+				{
+					$this->directory = '';
+					return array();
+				}
+			
+			}
+
+			return $segments;
+		}
+
+		// Can't find the requested controller...
+		show_404($segments[0]);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 *  Parse Routes
+	 *
+	 * This function matches any routes that may exist in
+	 * the config/routes.php file against the URI to
+	 * determine if the class/method need to be remapped.
+	 *
+	 * @access	private
+	 * @return	void
+	 */
+	function _parse_routes()
+	{
+		// Do we even have any custom routing to deal with?
+		// There is a default scaffolding trigger, so we'll look just for 1
+		if (count($this->routes) == 1)
+		{
+			$this->_set_request($this->uri->segments);
+			return;
+		}
+
+		// Turn the segment array into a URI string
+		$uri = implode('/', $this->uri->segments);
+
+		// Is there a literal match?  If so we're done
+		if (isset($this->routes[$uri]))
+		{
+			$this->_set_request(explode('/', $this->routes[$uri]));		
+			return;
+		}
+				
+		// Loop through the route array looking for wild-cards
+		foreach ($this->routes as $key => $val)
+		{						
+			// Convert wild-cards to RegEx
+			$key = str_replace(':any', '.+', str_replace(':num', '[0-9]+', $key));
+			
+			// Does the RegEx match?
+			if (preg_match('#^'.$key.'$#', $uri))
+			{			
+				// Do we have a back-reference?
+				if (strpos($val, '$') !== FALSE AND strpos($key, '(') !== FALSE)
+				{
+					$val = preg_replace('#^'.$key.'$#', $val, $uri);
+				}
+			
+				$this->_set_request(explode('/', $val));		
+				return;
+			}
+		}
+
+		// If we got this far it means we didn't encounter a
+		// matching route so we'll set the site default route
+		$this->_set_request($this->uri->segments);
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Set the class name
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	void
+	 */	
+	function set_class($class)
+	{
+		$this->class = $class;
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Fetch the current class
+	 *
+	 * @access	public
+	 * @return	string
+	 */	
+	function fetch_class()
+	{
+		return $this->class;
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 *  Set the method name
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	void
+	 */	
+	function set_method($method)
+	{
+		$this->method = $method;
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 *  Fetch the current method
+	 *
+	 * @access	public
+	 * @return	string
+	 */	
+	function fetch_method()
+	{
+		if ($this->method == $this->fetch_class())
+		{
+			return 'index';
+		}
+
+		return $this->method;
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 *  Set the directory name
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	void
+	 */	
+	function set_directory($dir)
+	{
+		$this->directory = $dir.'/';
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 *  Fetch the sub-directory (if any) that contains the requested controller class
+	 *
+	 * @access	public
+	 * @return	string
+	 */	
+	function fetch_directory()
+	{
+		return $this->directory;
+	}
+
+}
+// END Router Class
+
+/* End of file Router.php */
+/* Location: ./system/libraries/Router.php */
\ No newline at end of file