From 9d95581c44e52dd8944ff571f7eb63a3bb546d81 Mon Sep 17 00:00:00 2001
From: jesopo <github@lolnerd.net>
Date: Mon, 3 Sep 2018 11:47:11 +0100
Subject: [PATCH] Support IRCv3's chghost and invite-notify

---
 IRCLineHandler.py        | 26 +++++++++++++++++++-------
 IRCServer.py             |  2 ++
 modules/accept_invite.py |  5 +++--
 3 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/IRCLineHandler.py b/IRCLineHandler.py
index b995a0af..23b4fbad 100644
--- a/IRCLineHandler.py
+++ b/IRCLineHandler.py
@@ -7,6 +7,8 @@ RE_CHANMODES = re.compile(
 RE_CHANTYPES = re.compile(r"\bCHANTYPES=(\W+)(?:\b|$)")
 RE_MODES = re.compile(r"[-+]\w+")
 
+CAPABILITIES = {"message-tags", "multi-prefix", "chghost", "invite-notify"}
+
 class LineHandler(object):
     def __init__(self, bot, events):
         self.bot = bot
@@ -37,6 +39,7 @@ class LineHandler(object):
         events.on("raw").on("TOPIC").hook(self.topic)
         events.on("raw").on("PRIVMSG").hook(self.privmsg)
         events.on("raw").on("NOTICE").hook(self.notice)
+        events.on("raw").on("CHGHOST").hook(self.chghost)
 
         events.on("raw").on("CAP").hook(self.cap)
         events.on("raw").on("authenticate").hook(self.authenticate)
@@ -254,10 +257,9 @@ class LineHandler(object):
         subcommand = event["args"][1].lower()
 
         if subcommand == "ls":
-            if "message-tags" in capabilities:
-                event["server"].queue_capability("message-tags")
-            if "multi-prefix" in capabilities:
-                event["server"].queue_capability("multi-prefix")
+            matched_capabilities = set(capabilities) & CAPABILITIES
+            if matched_capabilities:
+                event["server"].queue_capabilities(matched_capabilities)
 
         self.events.on("received").on("cap").on(subcommand).call(
             capabilities=capabilities, server=event["server"])
@@ -331,16 +333,16 @@ class LineHandler(object):
             self.events.on("self").on("mode").call(modes=modes,
                 server=event["server"])
 
-    # I've been invited somewhere
+    # someone (maybe me!) has been invited somewhere
     def invite(self, event):
         nickname, username, hostname = Utils.seperate_hostmask(
             event["prefix"])
-
         target_channel = event["arbitrary"] or event["args"][1]
         user = event["server"].get_user(nickname)
+        targer_user = event["server"].get_user(event["args"][0])
         self.events.on("received").on("invite").call(
             user=user, target_channel=target_channel,
-            server=event["server"])
+            server=event["server"], target_user=target_user)
 
     # we've received a message
     def privmsg(self, event):
@@ -388,6 +390,16 @@ class LineHandler(object):
                     message=message, message_split=message_split,
                     user=user, server=event["server"])
 
+    # a user's username and/or hostname has changed
+    def chghost(self, event):
+        nickname, username, hostname = Utils.seperate_hostmask(
+            event["prefix"])
+        user = event["server"].get_user("nickanme")
+        username = event["args"][0]
+        hostname = event["args"][1]
+        user.username = username
+        user.hostname = hostname
+
     # response to a WHO command for user information
     def handle_352(self, event):
         user = event["server"].get_user(event["args"][5])
diff --git a/IRCServer.py b/IRCServer.py
index 1d30e1f9..7c833d20 100644
--- a/IRCServer.py
+++ b/IRCServer.py
@@ -279,6 +279,8 @@ class Server(object):
         self.send("CAP LS")
     def queue_capability(self, capability):
         self._capability_queue.add(capability)
+    def queue_capabilities(self, capabilities):
+        self._capability_queue.update(capabilities)
     def send_capability_queue(self):
         if self.has_capability_queue():
             capabilities = " ".join(self._capability_queue)
diff --git a/modules/accept_invite.py b/modules/accept_invite.py
index fc8648d7..671b76f4 100644
--- a/modules/accept_invite.py
+++ b/modules/accept_invite.py
@@ -5,5 +5,6 @@ class Module(object):
         events.on("received").on("invite").hook(self.on_invite)
 
     def on_invite(self, event):
-        if event["server"].get_setting("accept-invites", True):
-            event["server"].send_join(event["target_channel"])
+        if event["server"].is_own_nickname(event["target_user"].nickname):
+            if event["server"].get_setting("accept-invites", True):
+                event["server"].send_join(event["target_channel"])