--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/roundup/web/NOTES.md	Tue Jul 15 13:33:43 2014 +0300
@@ -0,0 +1,48 @@
+
+Engineering notes for Roundup components for web.
+
+
+### Logical structure of web components
+
+An attempt to see what components are present in
+web request processing.
+
+    +-----------+
+    |           |
+    | Router    |
+    └─----------+                     (pure logic)
+    ----------------------------------------------
+    +-----------+    
+    |           |    
+    | Login     |    
+    └-----------+   (logic + templates + messages)
+    ----------------------------------------------
+    +-----------+
+    ¦           ¦
+    ¦ User DB   ¦
+    └-----------+                       (messages)
+
+
+Every component consists of messages (data), logic
+(code) and representation (templates). Message
+definition (data) also takes into account actions
+that make component work. Templates are mostly
+needed for human readability. 
+
+
+### Router
+
+Status for Roundup URL map check:
+
+    [ ] urlmap component
+
+    /_file/(.*) 
+      StaticFileHandler
+       [ ] /_file
+       [ ] /_file/
+       [ ] /_file/name
+    /@@file/(.*)
+      StaticFileHandler
+       [ ] /@@file
+       [ ] /@@file/
+       [ ] /@@file/name

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/roundup/web/router.py	Tue Jul 15 13:33:43 2014 +0300
@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+"""
+The purpose of router is to make Roundup URL scheme configurable
+and allow extensions add their own handlers and URLs to tracker.
+
+Public domain work by:
+  anatoly techtonik <techtonik@gmail.com>
+"""
+
+import re
+
+
+class Router(object):
+
+    def __init__(self, urlmap=[]):
+        """
+        `urlmap` is a list (pattern, handler, pattern, ...)
+        """
+        self.urlmap = urlmap
+
+    def get_handler(self, urlpath):
+        """
+        `urlpath` is a part of url /that/looks?like=this
+
+        returns tuple (handler, arguments) or (None, ())
+        """
+        for i in range(0, len(self.urlmap), 2):
+            pattern, handler = self.urlmap[i], self.urlmap[i+1]
+            match = re.match(pattern, urlpath)
+            if match:
+                return handler, match.groups()
+        return (None, ())