add sticker support

CHANGELOG.md

@@ -4,6 +4,7 @@
 ### Added
 - `AWAY` and `away-notify`
 - Typing notifications
+- Sticker support (M->I only)
 
 ## v0.1.1 - 2022-02-09
 - Fix `DELETEMSG` being sent to unsupporting clients

README.md

@@ -79,7 +79,7 @@ On Libera I'm `emerson`, on Matrix I'm `@emersonveenstra:matrix.org`, feel free
 | Name | M->I | I->M | Notes |
 | ---- | :--: | :--: | ----- |
 | text, notice, emote messages | ✅ | ✅ ||
-| image, file, audio, video messages | 🟨 | ❌ | Show up as links on IRC |
+| image, sticker, file, audio, video messages | 🟨 | ❌ | Show up as links on IRC |
 | Channel joins | ✅ | ❌ | [#1](https://todo.sr.ht/~emerson/reflectionircd/1) |
 | Channel parts | ✅ | ✅ ||
 | Channel kicks | ✅ | ✅ ||

src/Server.ts

@@ -251,6 +251,9 @@ export class Server {
             case 'm.room.topic':
                 this.handleMatrixTopic(nextEvent, targetChannel);
                 break;
+            case 'm.sticker':
+                this.handleMatrixSticker(nextEvent, targetChannel);
+                break;
             case 'm.typing':
                 this.handleMatrixTyping(nextEvent, targetChannel);
                 break;
@@ -590,6 +593,25 @@ export class Server {
         });
     }
 
+    handleMatrixSticker(event: any, targetChannel: Channel) {
+        const sourceUser = this.getOrCreateMatrixUser(event["sender"]);
+        this.checkForLazyJoin(event, sourceUser, targetChannel);
+        const altText = event["content"]?.["body"];
+        const imgMxc = event["content"]?.["url"];
+        if (!altText || !imgMxc) {
+            return;
+        }
+        const mxcregex = imgMxc.match(/mxc:\/\/(?<servername>[^\/]+)\/(?<mediaid>.+)/)
+        let uri = imgMxc;
+        if (!mxcregex || !mxcregex.groups) {
+            console.log(`Failed to parse MXC URI: ${imgMxc}`);
+        } else {
+            uri = `${this.homeserver}/_matrix/media/v3/download/${mxcregex.groups.servername}/${mxcregex.groups.mediaid}`;
+        }
+        const messageContent = `\x01ACTION sent a sticker: ${altText}: ${uri}\x01`;
+        this.sendToAll(sourceUser.getMask(), 'PRIVMSG', [targetChannel.name, messageContent]);
+    }
+
     handleMatrixTyping(event: any, targetChannel: Channel) {
         const typingUsers = event["content"]?.["user_ids"];
         if (!typingUsers) {