Convert ~~~ to date/username text when editing mirror notes

Requested by Florian to make leaving notes on mirrors a bit easier.

Signed-off-by: Dan McGee <dan@archlinux.org>

mirrors/admin.py

@@ -1,3 +1,4 @@
+from datetime import datetime
 from urlparse import urlparse, urlunsplit
 
 from django import forms
@@ -73,6 +74,13 @@ class MirrorAdmin(admin.ModelAdmin):
             MirrorRsyncInlineAdmin,
     ]
 
+    def save_model(self, request, obj, form, change):
+        if '~~~' in obj.notes:
+            date = datetime.utcnow().strftime('%Y-%m-%d')
+            usertext = request.user.get_full_name()
+            obj.notes = obj.notes.replace('~~~', '%s (%s)' % (date, usertext))
+        obj.save()
+
 
 class MirrorProtocolAdmin(admin.ModelAdmin):
     list_display = ('protocol', 'is_download', 'default')