Added proper connection error handling.

telematica/ass1/async.py

@@ -51,6 +51,12 @@ class ClientConnection(object, AsyncBase, asyncore.dispatcher):
         if 'connect' in self.event_list:
             self.event_list['connect'](self)
 
+    def handle_error(self):
+        if hasattr(self, 'main'):
+            self.main.execute('disconnect')
+            self.main.display_info('Error raised due to a broken or refused'\
+                    + ' connection')
+
     def handle_close(self):
         self.close()
 

telematica/ass1/base_bar.py

@@ -16,15 +16,15 @@ class BaseBar(object):
         self.color_pair = curses.color_pair(0)
         self._prefix = ''
 
-    def prefix(self, value=''):
-        if not value:
+    def prefix(self, value=None):
+        if value == None: # Note: an empty string can also be set.
             return self._prefix
         self._prefix = value
         self.display(self._msg)
 
     def display(self, msg):
         self._msg = msg
-        if self.prefix:
+        if self.prefix():
             msg = self.prefix() + ' ' + msg
         # Curses will raise a 'curses.error' when the last possible character is
         # written. This exception should therefore always be catched. The raised

telematica/ass1/cli.py

@@ -158,7 +158,9 @@ class CLI:
             self.connection = None
             self.display_info('Offline. Type "/connect HOST" to connect' \
                     + ' to another chat server.')
+            self.info_bar.prefix('')
             self.debug_window.clear()
+            self.refresh()
 
         def help(main):
             if main.chat_window.displayed_help: