From 9da7f15e8f7eac024c0c7fc0377a0b581c2366ef Mon Sep 17 00:00:00 2001
From: Tulir Asokan <tulir@maunium.net>
Date: Sun, 26 Aug 2018 17:02:32 +0300
Subject: [PATCH] Add Matrix->WhatsApp room name changes

---
 ROADMAP.md |  2 +-
 matrix.go  | 41 +++++++++++++++++++++++++++++++++++++----
 portal.go  |  2 +-
 3 files changed, 39 insertions(+), 6 deletions(-)

diff --git a/ROADMAP.md b/ROADMAP.md
index f77d52b..59e6de8 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -16,7 +16,7 @@
     * [ ] Leave
     * [ ] Kick
   * [ ] Room metadata changes
-    * [ ] Name
+    * [x] Name
     * [ ] Avatar
     * [ ] Topic
   * [ ] Initial room metadata
diff --git a/matrix.go b/matrix.go
index 78beccc..aa63e57 100644
--- a/matrix.go
+++ b/matrix.go
@@ -17,11 +17,12 @@
 package main
 
 import (
-	"maunium.net/go/gomatrix"
-	"maunium.net/go/mautrix-whatsapp/types"
-	"maunium.net/go/mautrix-appservice"
-	"maunium.net/go/maulogger"
 	"strings"
+
+	"maunium.net/go/gomatrix"
+	"maunium.net/go/maulogger"
+	"maunium.net/go/mautrix-appservice"
+	"maunium.net/go/mautrix-whatsapp/types"
 )
 
 type MatrixHandler struct {
@@ -40,6 +41,9 @@ func NewMatrixHandler(bridge *Bridge) *MatrixHandler {
 	}
 	bridge.EventProcessor.On(gomatrix.EventMessage, handler.HandleMessage)
 	bridge.EventProcessor.On(gomatrix.StateMember, handler.HandleMembership)
+	bridge.EventProcessor.On(gomatrix.StateRoomName, handler.HandleRoomMetadata)
+	bridge.EventProcessor.On(gomatrix.StateRoomAvatar, handler.HandleRoomMetadata)
+	bridge.EventProcessor.On(gomatrix.StateTopic, handler.HandleRoomMetadata)
 	return handler
 }
 
@@ -94,6 +98,35 @@ func (mx *MatrixHandler) HandleMembership(evt *gomatrix.Event) {
 	}
 }
 
+func (mx *MatrixHandler) HandleRoomMetadata(evt *gomatrix.Event) {
+	user := mx.bridge.GetUser(types.MatrixUserID(evt.Sender))
+	if user == nil {
+		return
+	}
+
+	portal := user.GetPortalByMXID(evt.RoomID)
+	if portal == nil || portal.IsPrivateChat() {
+		return
+	}
+
+	var resp <-chan string
+	var err error
+	switch evt.Type {
+	case gomatrix.StateRoomName:
+		resp, err = user.Conn.UpdateGroupSubject(evt.Content.Name, portal.JID)
+	case gomatrix.StateRoomAvatar:
+		return
+	case gomatrix.StateTopic:
+		return
+	}
+	if err != nil {
+		mx.log.Errorln(err)
+	} else {
+		out := <-resp
+		mx.log.Infoln(out)
+	}
+}
+
 func (mx *MatrixHandler) HandleMessage(evt *gomatrix.Event) {
 	roomID := types.MatrixRoomID(evt.RoomID)
 	user := mx.bridge.GetUser(types.MatrixUserID(evt.Sender))
diff --git a/portal.go b/portal.go
index 4adbb45..a350fad 100644
--- a/portal.go
+++ b/portal.go
@@ -347,7 +347,7 @@ func (portal *Portal) CreateMatrixRoom() error {
 		InitialState: []*gomatrix.Event{{
 			Type: gomatrix.StatePowerLevels,
 			Content: gomatrix.Content{
-				PowerLevels: portal.GetBasePowerLevels(),
+				PowerLevels: *portal.GetBasePowerLevels(),
 			},
 		}},
 	})