--- a/frontends/src/jp/cmd_invitation.py	Mon Apr 03 00:23:01 2017 +0200
+++ b/frontends/src/jp/cmd_invitation.py	Mon Apr 03 00:23:01 2017 +0200
@@ -130,8 +130,51 @@
                             exit_code=C.EXIT_BRIDGE_ERRBACK))
 
 
+class Modify(base.CommandBase):
+
+    def __init__(self, host):
+        base.CommandBase.__init__(self, host, 'modify', use_profile=False, help=_(u'modify existing invitation'))
+        self.need_loop=True
+
+    def add_parser_options(self):
+        self.parser.add_argument("--replace", action='store_true', help='replace the whole data')
+        self.parser.add_argument("-n", "--name", type=base.unicode_decoder, default='', help='name of the invitee')
+        self.parser.add_argument("-N", "--host-name", type=base.unicode_decoder, default='', help='name of the host')
+        self.parser.add_argument("-e", "--email", type=base.unicode_decoder, default='', help='email to send the invitation to (if --no-email is set, email will just be saved)')
+        self.parser.add_argument("-l", "--lang", type=base.unicode_decoder, default='', help='main language spoken by the invitee')
+        self.parser.add_argument("-x", "--extra", metavar=('KEY', 'VALUE'), type=base.unicode_decoder, action='append', nargs=2, default=[], help='extra data to associate with invitation/invitee')
+        self.parser.add_argument("-p", "--profile", type=base.unicode_decoder, default='', help="profile doing the invitation (default: don't associate profile")
+        self.parser.add_argument("id", type=base.unicode_decoder,
+                                 help=_(u"invitation UUID"))
+
+    def invitationModifyCb(self):
+        self.disp(_(u'invitations have been modified correctly'))
+        self.host.quit(C.EXIT_OK)
+
+    def invitationModifyEb(self, failure_):
+        self.disp(u"can't create invitation: {reason}".format(
+            reason=failure_), error=True)
+        self.host.quit(C.EXIT_BRIDGE_ERRBACK)
+
+    def start(self):
+        extra = dict(self.args.extra)
+        for arg_name in ('name', 'host_name', 'email', 'lang', 'profile'):
+            value = getattr(self.args, arg_name)
+            if not value:
+                continue
+            if arg_name in extra:
+                self.parser.error(_(u"you can't set {arg_name} in both optional argument and extra").format(arg_name=arg_name))
+            extra[arg_name] = value
+        self.host.bridge.invitationModify(
+            self.args.id,
+            extra,
+            self.args.replace,
+            callback=self.invitationModifyCb,
+            errback=self.invitationModifyEb)
+
+
 class Invitation(base.CommandBase):
-    subcommands = (Create, Get)
+    subcommands = (Create, Get, Modify)
 
     def __init__(self, host):
         super(Invitation, self).__init__(host, 'invitation', use_profile=False, help=_(u'invitation of user(s) without XMPP account'))