From 4b8ee81b237da11f81ca1fdfb9d4180184415d1a Mon Sep 17 00:00:00 2001
From: emerson <git@emersonveenstra.net>
Date: Fri, 21 Jan 2022 12:14:53 -0500
Subject: [PATCH] Better channel naming and renaming.

Still a few weird bugs, but it's better now
---
 README.md      |  3 ++-
 src/Channel.ts | 23 ++++++++++++++++++++++-
 src/Client.ts  |  5 ++++-
 src/IRCUser.ts |  4 ++++
 4 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index c66fa9c..a91010c 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,8 @@ That said, it is usable for basic chatting.
 | Channel topics | ✅ | ❌ ||
 | Channel powers | ❌ | ❌ ||
 | Encrypted rooms | ❌ | ❌ ||
-| Message replies <small>(IRCv3)</small> | ❌ | ❌ ||
+| Channel renaming <small>(IRCv3)</small> | 🟨 | ❌ | Only when the canonical alias changes |
+| Message replies <small>(IRCv3)</small> | ✅ | ❌ ||
 | Message reactions <small>(IRCv3)</small> | ❌ | ❌ ||
 | Chat history <small>(IRCv3)</small> | ❌ | ❌ ||
 | Multiline messages <small>(IRCv3)</small> | ❌ | ❌ ||
diff --git a/src/Channel.ts b/src/Channel.ts
index c1f0755..a9f0af0 100644
--- a/src/Channel.ts
+++ b/src/Channel.ts
@@ -43,6 +43,25 @@ export class Channel {
         return opStatus;
     }
 
+    updateRoomName(newNameEvent: any) {
+        const newName: string = newNameEvent["content"]["alias"];
+        if (!newName || newName === this.name)
+            return;
+        const oldName = this.name;
+        this.name = newName;
+        this.ircUsers.forEach((user, username) => {
+            user.getClients().forEach(client => {
+                if (client.enabledCaps.has("draft/channel-rename")) {
+                    client.sendMessage(this.server.name, "RENAME", [oldName, this.name, "New channel name set"], new Map());
+                }
+                else {
+                    client.sendMessage(this.server.name, "PART", [oldName, "Renaming channel"], new Map());
+                    this.joinNewIRCClient(client, new Map());
+                }
+            })
+        })
+    }
+
     joinNewIRCClient(client: Client, passedTags: Map<string, string>) {
         if (!client.user)
             return;
@@ -126,6 +145,9 @@ export class Channel {
             return;
 
         switch (event["type"]) {
+            case 'm.room.canonical_alias':
+                this.updateRoomName(event);
+                break;
             case 'm.room.guest_access':
                 this.handleMatrixGuestAccess(event);
                 break;
@@ -166,7 +188,6 @@ export class Channel {
             case 'm.room.bot.options':
             case 'm.room.pinned_events':
             case 'm.room.tombstone':
-            case 'm.room.canonical_alias':
             case 'm.room.server_acl':
             case 'org.matrix.room.preview_urls':
                 break;
diff --git a/src/Client.ts b/src/Client.ts
index 862f744..03e156b 100644
--- a/src/Client.ts
+++ b/src/Client.ts
@@ -23,6 +23,7 @@ export class Client {
             ["account-tag", ""],
             ["batch", ""],
             ["draft/chathistory", ""],
+            ["draft/channel-rename", ""],
             ["echo-message", ""],
             ["draft/event-playback", ""],
             ["extended-join", ""],
@@ -190,11 +191,13 @@ export class Client {
                             if (this.user === null)
                                 return;
                             if (rooms['join']) {
+                                const joinedRooms: Set<Channel> = new Set();
                                 for (const roomId of Object.keys(rooms.join)) {
                                     const targetChannel = this.server.getOrCreateIRCChannel(roomId);
-                                    this.user.channels.add(targetChannel);
+                                    joinedRooms.add(targetChannel);
                                     rooms.join[roomId].state.events.forEach((nextEvent: any) => targetChannel.routeMatrixEvent(nextEvent));
                                 }
+                                joinedRooms.forEach(c => {if (this.user !== null) this.user.channels.add(c)});
                             }
                             if (this.user === null)
                                 return;
diff --git a/src/IRCUser.ts b/src/IRCUser.ts
index f48a80a..455f44c 100644
--- a/src/IRCUser.ts
+++ b/src/IRCUser.ts
@@ -44,6 +44,10 @@ export class IRCUser {
         return `${this.nick}!${this.ident}@${this.hostname}`;
     }
 
+    getClients(): Set<Client> {
+        return this.clients;
+    }
+
     addClient(client: Client, passedTags: Map<string, string>) {
         this.clients.add(client);
         if (this.nextBatch !== "") {