move save of config to separate method in IrcAdmin, save config when receiving ^C

TODO

@@ -10,7 +10,6 @@ dr.botzo --- TODO
    * karma v2
    * some sort of cron interface (periodic events)
    * named pipe to send commands to the bot outside of IRC
-   * properly save when receiving ^C
    * url module
       * direct adds implied. also do historical urls?
          * last 20 or something?

modules/IrcAdmin.py

@@ -15,6 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from ConfigParser import NoOptionError
+import signal
 import sys
 
 from irclib import irclib
@@ -29,6 +30,9 @@ class IrcAdmin(Module):
         super(IrcAdmin, self).__init__(config, server, modlist)
         modlist.append(self)
 
+        # we define save, so we'll bite the bullet and take SIGINT
+        signal.signal(signal.SIGINT, self.sigint_handler)
+
     def register_handlers(self, server):
         server.add_global_handler('welcome', self.on_connect)
         server.add_global_handler('pubmsg', self.on_pubmsg)
@@ -99,8 +103,7 @@ class IrcAdmin(Module):
             if replypath is not None:
                 connection.privmsg(replypath, 'quitting')
             connection.quit(' '.join(whats[1:]))
-            with open('dr.botzo.cfg', 'w') as cfg:
-                self.config.write(cfg)
+            self.save_config()
             sys.exit()
 
     def sub_autojoin_manipulate(self, connection, event, nick, userhost, replypath, what, admin_unlocked):
@@ -158,5 +161,16 @@ class IrcAdmin(Module):
             else:
                 connection.privmsg(replypath, replystr)
 
+    # Save the config file.
+    def save_config(self):
+        with open('dr.botzo.cfg', 'w') as cfg:
+            self.config.write(cfg)
+
+    # SIGINT signal handler
+    def sigint_handler(self, signal, frame):
+        self.save_config()
+        print('saved config')
+        sys.exit()
+
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