code/request_handler.php

@@ -0,0 +1,71 @@
+<?php
+    
+    /*
+     * RequestHandler
+     * This class decodes the Request URI in order to store multiple variables in the request URI itself
+     */
+     
+    class RequestHandler {
+    	
+    	// The request uri
+    	private $request_string;
+    	// Stores a list of all the variables we've already found to avoid needing to
+    	// find them using regular expressions many times.
+    	private $cache;
+    	
+    	public function __construct( $request_string ) {
+    		$this->request_string = $request_string;
+    		$this->cache = array();
+		}
+		
+		public function current_page() {
+			return $this->request_string;
+		}
+		
+		public function get( $key, $value_pattern = '[^/]*' ) {
+			// Look in the cache to see if weve already decoded this variable
+			if( in_array( $key, $this->cache ) ) return $this->cache[ $key ];
+			
+			// Construct the regex to search for /$key/$value/ pairs, and return the $value part
+			$key = str_replace('£', '\£', $key);
+			$value_pattern = str_replace('£', '\£', $value_pattern);
+			$pattern = "£/{$key}/({$value_pattern})(/|\$)£";
+			
+			// Look to see if this variable is in the request string
+			$count = preg_match( $pattern, $this->request_string, $matches );
+			
+			// See if the variable was set
+			if( $count == 0 ) return null;
+			
+			// Store the result for next time
+			$this->cache[ $key ] = $matches[1];
+			
+			// And return it to the user
+			return $matches[1];
+		}
+		
+		public function construct() {
+			global $_meta;
+			
+			// Varargsy
+			$args = func_get_args();
+			
+			// Construct the proper request string for these arguments
+			$request_string = "{$_meta['base-dir']}/";
+			$count = count( $args );
+			for( $i = 0 ; $i < $count; $i++ ) {
+				$arg = $args[ $i ];
+				// If this item is null, try to find the value of the previous key from the current
+				// request object as a convenience to the user. It assumes the default value pattern.
+				if( $arg === null && $i > 0) {
+					$arg = $this->get( $args[ $i -1 ] );
+				}
+				$request_string .= urlencode($arg) . '/';
+			}
+			
+			return $request_string;
+		}
+    	
+	};
+    
+?>