d->m typing notifications

d2m/actions/send-message.js

@@ -34,6 +34,7 @@ async function sendMessage(message, guild) {
 	let eventPart = 0 // 0 is primary, 1 is supporting
 	if (events.length) {
 		db.prepare("REPLACE INTO message_channel (message_id, channel_id) VALUES (?, ?)").run(message.id, message.channel_id)
+		if (senderMxid) api.sendTyping(roomID, false, senderMxid)
 	}
 	for (const event of events) {
 		const eventType = event.$type

d2m/discord-packets.js

@@ -117,6 +117,9 @@ const utils = {
 				} else if (message.t === "MESSAGE_DELETE") {
 					await eventDispatcher.onMessageDelete(client, message.d)
 
+				} else if (message.t === "TYPING_START") {
+					await eventDispatcher.onTypingStart(client, message.d)
+
 				} else if (message.t === "MESSAGE_REACTION_ADD") {
 					await eventDispatcher.onReactionAdd(client, message.d)
 				}

d2m/event-dispatcher.js

@@ -215,5 +215,20 @@ module.exports = {
 	 */
 	async onMessageDelete(client, data) {
 		await deleteMessage.deleteMessage(data)
+	},
+
+	/**
+	 * @param {import("./discord-client")} client
+	 * @param {import("discord-api-types/v10").GatewayTypingStartDispatchData} data
+	 */
+	async onTypingStart(client, data) {
+		const roomID = db.prepare("SELECT room_id FROM channel_room WHERE channel_id = ?").pluck().get(data.channel_id)
+		if (!roomID) return
+		const mxid = db.prepare("SELECT mxid FROM sim INNER JOIN sim_member USING (mxid) WHERE discord_id = ? AND room_id = ?").pluck().get(data.user_id, roomID)
+		if (!mxid) return
+		// Each Discord user triggers the notification every 8 seconds as long as they remain typing.
+		// Discord does not send typing stopped events, so typing only stops if the timeout is reached or if the user sends their message.
+		// (We have to manually stop typing on Matrix-side when the message is sent. This is part of the send action.)
+		await api.sendTyping(roomID, true, mxid, 10000)
 	}
 }