From b5d39b96b94bd38c9ba3fdbd0372e36909717e46 Mon Sep 17 00:00:00 2001
From: Pavel Djundik <github@xpaw.me>
Date: Tue, 19 Sep 2017 18:22:50 +0300
Subject: [PATCH] Handle CHGHOST cap

---
 client/js/condensed.js            |  3 +++
 client/js/constants.js            |  2 ++
 client/views/actions/chghost.tpl  |  4 ++++
 client/views/index.js             |  1 +
 src/client.js                     |  2 ++
 src/models/msg.js                 |  1 +
 src/plugins/irc-events/chghost.js | 31 +++++++++++++++++++++++++++++++
 7 files changed, 44 insertions(+)
 create mode 100644 client/views/actions/chghost.tpl
 create mode 100644 src/plugins/irc-events/chghost.js

diff --git a/client/js/condensed.js b/client/js/condensed.js
index 87d5930e..a7c49668 100644
--- a/client/js/condensed.js
+++ b/client/js/condensed.js
@@ -29,6 +29,9 @@ function updateText(condensed, addedTypes) {
 			case "back":
 				strings.push(obj[type] + (obj[type] > 1 ? " users have come back" : " user has come back"));
 				break;
+			case "chghost":
+				strings.push(obj[type] + (obj[type] > 1 ? " users have changed hostname" : " user has changed hostname"));
+				break;
 			case "join":
 				strings.push(obj[type] + (obj[type] > 1 ? " users have joined the channel" : " user has joined the channel"));
 				break;
diff --git a/client/js/constants.js b/client/js/constants.js
index 6958ace0..754a349b 100644
--- a/client/js/constants.js
+++ b/client/js/constants.js
@@ -84,12 +84,14 @@ const actionTypes = [
 	"action",
 	"whois",
 	"ctcp",
+	"chghost",
 	"channel_list",
 ];
 
 const condensedTypes = [
 	"away",
 	"back",
+	"chghost",
 	"join",
 	"part",
 	"quit",
diff --git a/client/views/actions/chghost.tpl b/client/views/actions/chghost.tpl
new file mode 100644
index 00000000..0f89c69e
--- /dev/null
+++ b/client/views/actions/chghost.tpl
@@ -0,0 +1,4 @@
+{{> ../user_name nick=from.nick mode=from.mode}}
+has changed
+{{#if new_ident}}username to <b>{{new_ident}}</b>{{#if new_host}}, and{{/if}}{{/if}}
+{{#if new_host}}hostname to <i class="hostmask">{{new_host}}</i>{{/if}}
diff --git a/client/views/index.js b/client/views/index.js
index 267f0691..9f5bf6c0 100644
--- a/client/views/index.js
+++ b/client/views/index.js
@@ -7,6 +7,7 @@ module.exports = {
 		back: require("./actions/back.tpl"),
 		ban_list: require("./actions/ban_list.tpl"),
 		channel_list: require("./actions/channel_list.tpl"),
+		chghost: require("./actions/chghost.tpl"),
 		ctcp: require("./actions/ctcp.tpl"),
 		invite: require("./actions/invite.tpl"),
 		join: require("./actions/join.tpl"),
diff --git a/src/client.js b/src/client.js
index 94a8cc59..65db1235 100644
--- a/src/client.js
+++ b/src/client.js
@@ -20,6 +20,7 @@ var events = [
 	"unhandled",
 	"banlist",
 	"ctcp",
+	"chghost",
 	"error",
 	"invite",
 	"join",
@@ -255,6 +256,7 @@ Client.prototype.connect = function(args) {
 		tls: network.tls,
 		localAddress: config.bind,
 		rejectUnauthorized: false,
+		enable_chghost: true,
 		enable_echomessage: true,
 		auto_reconnect: true,
 		auto_reconnect_wait: 10000 + Math.floor(Math.random() * 1000), // If multiple users are connected to the same network, randomize their reconnections a little
diff --git a/src/models/msg.js b/src/models/msg.js
index 6c53e212..2ea8193a 100644
--- a/src/models/msg.js
+++ b/src/models/msg.js
@@ -56,6 +56,7 @@ Msg.Type = {
 	PART: "part",
 	QUIT: "quit",
 	CTCP: "ctcp",
+	CHGHOST: "chghost",
 	TOPIC: "topic",
 	TOPIC_SET_BY: "topic_set_by",
 	WHOIS: "whois",
diff --git a/src/plugins/irc-events/chghost.js b/src/plugins/irc-events/chghost.js
new file mode 100644
index 00000000..2636bb5f
--- /dev/null
+++ b/src/plugins/irc-events/chghost.js
@@ -0,0 +1,31 @@
+"use strict";
+
+const Msg = require("../../models/msg");
+
+module.exports = function(irc, network) {
+	const client = this;
+
+	// If server supports CHGHOST cap, then changing the hostname does not require
+	// sending PART and JOIN, which means less work for us over all
+	irc.on("user updated", function(data) {
+		const msg = new Msg({
+			time: data.time,
+			type: Msg.Type.CHGHOST,
+			new_ident: data.ident !== data.new_ident ? data.new_ident : "",
+			new_host: data.hostname !== data.new_host ? data.new_host : "",
+			self: data.nick === irc.user.nick,
+		});
+
+		network.channels.forEach((chan) => {
+			const user = chan.findUser(data.nick);
+
+			if (typeof user === "undefined") {
+				return;
+			}
+
+			msg.from = user;
+
+			chan.pushMessage(client, msg);
+		});
+	});
+};