attempt to support THREAD_CREATE but it explodes

d2m/actions/add-reaction.js

@@ -22,7 +22,7 @@ async function addReaction(data) {
    assert.equal(typeof parentID, "string")
 	const roomID = await createRoom.ensureRoom(data.channel_id)
 	const senderMxid = await registerUser.ensureSimJoined(user, roomID)
-	const eventID = api.sendEvent(roomID, "m.reaction", {
+	const eventID = await api.sendEvent(roomID, "m.reaction", {
       "m.relates_to": {
          rel_type: "m.annotation",
          event_id: parentID,

d2m/actions/create-room.js

@@ -21,8 +21,8 @@ async function roomToKState(roomID) {
 }
 
 /**
- * @params {string} roomID
- * @params {any} kstate
+ * @param {string} roomID
+ * @param {any} kstate
  */
 function applyKStateDiffToRoom(roomID, kstate) {
 	const events = ks.kstateToState(kstate)
@@ -51,7 +51,7 @@ function convertNameAndTopic(channel, guild, customName) {
 }
 
 /**
- * @param {DiscordTypes.APIGuildTextChannel} channel
+ * @param {DiscordTypes.APIGuildTextChannel | DiscordTypes.APIThreadChannel} channel
  * @param {DiscordTypes.APIGuild} guild
  */
 async function channelToKState(channel, guild) {
@@ -98,21 +98,27 @@ async function channelToKState(channel, guild) {
  * @returns {Promise<string>} room ID
  */
 async function createRoom(channel, guild, spaceID, kstate) {
+	const [convertedName, convertedTopic] = convertNameAndTopic(channel, guild, null)
 	const roomID = await api.createRoom({
-		name: channel.name,
-		topic: channel.topic || undefined,
+		name: convertedName,
+		topic: convertedTopic,
 		preset: "private_chat",
 		visibility: "private",
 		invite: ["@cadence:cadence.moe"], // TODO
 		initial_state: ks.kstateToState(kstate)
 	})
 
-	db.prepare("INSERT INTO channel_room (channel_id, room_id) VALUES (?, ?)").run(channel.id, roomID)
+	let threadParent = null
+	if (channel.type === DiscordTypes.ChannelType.PublicThread) {
+		/** @type {DiscordTypes.APIThreadChannel} */ // @ts-ignore
+		const thread = channel
+		threadParent = thread.parent_id
+	}
+
+	db.prepare("INSERT INTO channel_room (channel_id, room_id, name, nick, thread_parent) VALUES (?, ?, ?, NULL, ?)").run(channel.id, roomID, channel.name, threadParent)
 
 	// Put the newly created child into the space
-	await api.sendState(spaceID, "m.space.child", roomID, { // TODO: should I deduplicate with the equivalent code from syncRoom?
-		via: ["cadence.moe"] // TODO: use the proper server
-	})
+	_syncSpaceMember(channel, spaceID, roomID)
 
 	return roomID
 }
@@ -156,14 +162,15 @@ async function _syncRoom(channelID, shouldActuallySync) {
 	assert.ok(channel)
 	const guild = channelToGuild(channel)
 
-	/** @type {string?} */
-	const existing = db.prepare("SELECT room_id from channel_room WHERE channel_id = ?").pluck().get(channel.id)
+	/** @type {{room_id: string, thread_parent: string?}} */
+	const existing = db.prepare("SELECT room_id, thread_parent from channel_room WHERE channel_id = ?").get(channelID)
+
 	if (!existing) {
 		const {spaceID, channelKState} = await channelToKState(channel, guild)
 		return createRoom(channel, guild, spaceID, channelKState)
 	} else {
 		if (!shouldActuallySync) {
-			return existing // only need to ensure room exists, and it does. return the room ID
+			return existing.room_id // only need to ensure room exists, and it does. return the room ID
 		}
 
 		console.log(`[room sync] to matrix: ${channel.name}`)
@@ -171,24 +178,68 @@ async function _syncRoom(channelID, shouldActuallySync) {
 		const {spaceID, channelKState} = await channelToKState(channel, guild)
 
 		// sync channel state to room
-		const roomKState = await roomToKState(existing)
+		const roomKState = await roomToKState(existing.room_id)
 		const roomDiff = ks.diffKState(roomKState, channelKState)
-		const roomApply = applyKStateDiffToRoom(existing, roomDiff)
+		const roomApply = applyKStateDiffToRoom(existing.room_id, roomDiff)
 
 		// sync room as space member
-		const spaceKState = await roomToKState(spaceID)
-		const spaceDiff = ks.diffKState(spaceKState, {
-			[`m.space.child/${existing}`]: {
-				via: ["cadence.moe"] // TODO: use the proper server
-			}
-		})
-		const spaceApply = applyKStateDiffToRoom(spaceID, spaceDiff)
+		const spaceApply = _syncSpaceMember(channel, spaceID, existing.room_id)
 		await Promise.all([roomApply, spaceApply])
 
-		return existing
+		return existing.room_id
 	}
 }
 
+async function _unbridgeRoom(channelID) {
+	/** @ts-ignore @type {DiscordTypes.APIGuildChannel} */
+	const channel = discord.channels.get(channelID)
+	assert.ok(channel)
+	const roomID = db.prepare("SELECT room_id from channel_room WHERE channel_id = ?").pluck().get(channelID)
+	assert.ok(roomID)
+	const spaceID = db.prepare("SELECT space_id FROM guild_space WHERE guild_id = ?").pluck().get(channel.guild_id)
+	assert.ok(spaceID)
+
+	// remove room from being a space member
+	await api.sendState(spaceID, "m.space.child", roomID, {})
+
+	// send a notification in the room
+	await api.sendEvent(roomID, "m.room.message", {
+		msgtype: "m.notice",
+		body: "⚠️ This room was removed from the bridge."
+	})
+
+	// leave room
+	await api.leaveRoom(roomID)
+
+	// delete room from database
+	const {changes} = db.prepare("DELETE FROM channel_room WHERE room_id = ? AND channel_id = ?").run(roomID, channelID)
+	assert.equal(changes, 1)
+}
+
+
+/**
+ * @param {DiscordTypes.APIGuildTextChannel} channel
+ * @param {string} spaceID
+ * @param {string} roomID
+ * @returns {Promise<string[]>}
+ */
+async function _syncSpaceMember(channel, spaceID, roomID) {
+	const spaceKState = await roomToKState(spaceID)
+	let spaceEventContent = {}
+	if (
+		channel.type !== DiscordTypes.ChannelType.PrivateThread // private threads do not belong in the space (don't offer people something they can't join)
+		|| channel["thread_metadata"]?.archived // archived threads do not belong in the space (don't offer people conversations that are no longer relevant)
+	) {
+		spaceEventContent = {
+			via: ["cadence.moe"] // TODO: use the proper server
+		}
+	}
+	const spaceDiff = ks.diffKState(spaceKState, {
+		[`m.space.child/${roomID}`]: spaceEventContent
+	})
+	return applyKStateDiffToRoom(spaceID, spaceDiff)
+}
+
 function ensureRoom(channelID) {
 	return _syncRoom(channelID, false)
 }
@@ -201,8 +252,11 @@ async function createAllForGuild(guildID) {
 	const channelIDs = discord.guildChannelMap.get(guildID)
 	assert.ok(channelIDs)
 	for (const channelID of channelIDs) {
-		if (discord.channels.get(channelID)?.type === DiscordTypes.ChannelType.GuildText) { // TODO: guild sync thread channels and such. maybe make a helper function to check if a given channel is syncable?
-			await syncRoom(channelID).then(r => console.log(`synced ${channelID}:`, r))
+		const allowedTypes = [DiscordTypes.ChannelType.GuildText, DiscordTypes.ChannelType.PublicThread]
+		// @ts-ignore
+		if (allowedTypes.includes(discord.channels.get(channelID)?.type)) {
+			const roomID = await syncRoom(channelID)
+			console.log(`synced ${channelID} <-> ${roomID}`)
 		}
 	}
 }
@@ -213,3 +267,4 @@ module.exports.syncRoom = syncRoom
 module.exports.createAllForGuild = createAllForGuild
 module.exports.channelToKState = channelToKState
 module.exports._convertNameAndTopic = convertNameAndTopic
+module.exports._unbridgeRoom = _unbridgeRoom

d2m/actions/create-space.js

@@ -1,5 +1,6 @@
 // @ts-check
 
+const assert = require("assert")
 const passthrough = require("../../passthrough")
 const { sync, db } = passthrough
 /** @type {import("../../matrix/api")} */
@@ -9,13 +10,14 @@ const api = sync.require("../../matrix/api")
  * @param {import("discord-api-types/v10").RESTGetAPIGuildResult} guild
  */
 async function createSpace(guild) {
+	assert(guild.name)
 	const roomID = await api.createRoom({
 		name: guild.name,
-		preset: "private_chat",
+		preset: "private_chat", // cannot join space unless invited
 		visibility: "private",
 		power_level_content_override: {
-			events_default: 100,
-			invite: 50
+			events_default: 100, // space can only be managed by bridge
+			invite: 0 // any existing member can invite others
 		},
 		invite: ["@cadence:cadence.moe"], // TODO
 		topic: guild.description || undefined,
@@ -27,13 +29,13 @@ async function createSpace(guild) {
 				type: "m.room.guest_access",
 				state_key: "",
 				content: {
-					guest_access: "can_join"
+					guest_access: "can_join" // guests can join space if other conditions are met
 				}
 			},
 			{
 				type: "m.room.history_visibility",
 				content: {
-					history_visibility: "invited"
+					history_visibility: "invited" // any events sent after user was invited are visible
 				}
 			}
 		]

d2m/actions/edit-message.js

@@ -12,10 +12,7 @@ const api = sync.require("../../matrix/api")
  * @param {import("discord-api-types/v10").APIGuild} guild
  */
 async function editMessage(message, guild) {
-	console.log(`*** applying edit for message ${message.id} in channel ${message.channel_id}`)
 	const {roomID, eventsToRedact, eventsToReplace, eventsToSend, senderMxid} = await editToChanges.editToChanges(message, guild, api)
-	console.log("making these changes:")
-	console.dir({eventsToRedact, eventsToReplace, eventsToSend}, {depth: null})
 
 	// 1. Replace all the things.
 	for (const {oldID, newContent} of eventsToReplace) {

d2m/actions/register-user.js

@@ -85,7 +85,8 @@ async function ensureSimJoined(user, roomID) {
  */
 async function memberToStateContent(user, member, guildID) {
 	let displayname = user.username
-	if (member.nick && member.nick !== displayname) displayname = member.nick + " | " + displayname // prepend nick if present
+	// if (member.nick && member.nick !== displayname) displayname = member.nick + " | " + displayname // prepend nick if present
+	if (member.nick) displayname = member.nick
 
 	const content = {
 		displayname,

d2m/actions/register-user.test.js

@@ -8,7 +8,7 @@ test("member2state: general", async t => {
 		await _memberToStateContent(testData.member.sheep.user, testData.member.sheep, testData.guild.general.id),
 		{
 			avatar_url: "mxc://cadence.moe/rfemHmAtcprjLEiPiEuzPhpl",
-			displayname: "The Expert's Submarine | aprilsong",
+			displayname: "The Expert's Submarine",
 			membership: "join",
 			"moe.cadence.ooye.member": {
 				avatar: "/guilds/112760669178241024/users/134826546694193153/avatars/38dd359aa12bcd52dd3164126c587f8c.png?size=1024"

d2m/actions/send-message.js

@@ -22,8 +22,11 @@ async function sendMessage(message, guild) {
 
 	let senderMxid = null
 	if (!message.webhook_id) {
-		assert(message.member)
-		senderMxid = await registerUser.syncUser(message.author, message.member, message.guild_id, roomID)
+		if (message.member) { // available on a gateway message create event
+			senderMxid = await registerUser.syncUser(message.author, message.member, message.guild_id, roomID)
+		} else { // well, good enough...
+			senderMxid = await registerUser.ensureSimJoined(message.author, roomID)
+		}
 	}
 
 	const events = await messageToEvent.messageToEvent(message, guild, {}, {api})
@@ -35,7 +38,7 @@ async function sendMessage(message, guild) {
 		const eventWithoutType = {...event}
 		delete eventWithoutType.$type
 
-		const eventID = await api.sendEvent(roomID, eventType, event, senderMxid)
+		const eventID = await api.sendEvent(roomID, eventType, event, senderMxid, new Date(message.timestamp).getTime())
 		db.prepare("INSERT INTO event_message (event_id, event_type, event_subtype, message_id, channel_id, part, source) VALUES (?, ?, ?, ?, ?, ?, 1)").run(eventID, eventType, event.msgtype || null, message.id, message.channel_id, eventPart) // source 1 = discord
 
 		eventPart = 1 // TODO: use more intelligent algorithm to determine whether primary or supporting

d2m/converters/message-to-event.embeds.test.js

@@ -0,0 +1,40 @@
+const {test} = require("supertape")
+const {messageToEvent} = require("./message-to-event")
+const data = require("../../test/data")
+const Ty = require("../../types")
+
+/**
+ * @param {string} roomID
+ * @param {string} eventID
+ * @returns {(roomID: string, eventID: string) => Promise<Ty.Event.Outer<Ty.Event.M_Room_Message>>}
+ */
+function mockGetEvent(t, roomID_in, eventID_in, outer) {
+	return async function(roomID, eventID) {
+		t.equal(roomID, roomID_in)
+		t.equal(eventID, eventID_in)
+		return new Promise(resolve => {
+			setTimeout(() => {
+				resolve({
+					event_id: eventID_in,
+					room_id: roomID_in,
+					origin_server_ts: 1680000000000,
+					unsigned: {
+						age: 2245,
+						transaction_id: "$local.whatever"
+					},
+					...outer
+				})
+			})
+		})
+	}
+}
+
+test("message2event embeds: nothing but a field", async t => {
+	const events = await messageToEvent(data.message_with_embeds.nothing_but_a_field, data.guild.general, {})
+	t.deepEqual(events, [{
+		$type: "m.room.message",
+		"m.mentions": {},
+		msgtype: "m.text",
+		body: "Amanda"
+	}])
+})

d2m/converters/message-to-event.js

@@ -27,11 +27,13 @@ function getDiscordParseCallbacks(message, useHTML) {
 		},
 		/** @param {{id: string, type: "discordChannel"}} node */
 		channel: node => {
-			const {room_id, name, nick} = db.prepare("SELECT room_id, name, nick FROM channel_room WHERE channel_id = ?").get(node.id)
-			if (room_id && useHTML) {
-				return `<a href="https://matrix.to/#/${room_id}">#${nick || name}</a>`
+			const row = db.prepare("SELECT room_id, name, nick FROM channel_room WHERE channel_id = ?").get(node.id)
+			if (!row) {
+				return `<#${node.id}>` // fallback for when this channel is not bridged
+			} else if (useHTML) {
+				return `<a href="https://matrix.to/#/${row.room_id}">#${row.nick || row.name}</a>`
 			} else {
-				return `#${nick || name}`
+				return `#${row.nick || row.name}`
 			}
 		},
 		/** @param {{animated: boolean, name: string, id: string, type: "discordEmoji"}} node */
@@ -108,6 +110,13 @@ async function messageToEvent(message, guild, options = {}, di) {
 		addMention(repliedToEventSenderMxid)
 	}
 
+	let msgtype = "m.text"
+	// Handle message type 4, channel name changed
+	if (message.type === DiscordTypes.MessageType.ChannelNameChange) {
+		msgtype = "m.emote"
+		message.content = "changed the channel name to **" + message.content + "**"
+	}
+
 	// Text content appears first
 	if (message.content) {
 		let content = message.content
@@ -188,7 +197,7 @@ async function messageToEvent(message, guild, options = {}, di) {
 		const newTextMessageEvent = {
 			$type: "m.room.message",
 			"m.mentions": mentions,
-			msgtype: "m.text",
+			msgtype,
 			body: body
 		}
 
@@ -239,6 +248,22 @@ async function messageToEvent(message, guild, options = {}, di) {
 					size: attachment.size
 				}
 			}
+		} else if (attachment.content_type?.startsWith("video/") && attachment.width && attachment.height) {
+			return {
+				$type: "m.room.message",
+				"m.mentions": mentions,
+				msgtype: "m.video",
+				url: await file.uploadDiscordFileToMxc(attachment.url),
+				external_url: attachment.url,
+				body: attachment.description || attachment.filename,
+				filename: attachment.filename,
+				info: {
+					mimetype: attachment.content_type,
+					w: attachment.width,
+					h: attachment.height,
+					size: attachment.size
+				}
+			}
 		} else {
 			return {
 				$type: "m.room.message",

d2m/converters/message-to-event.test.js

@@ -330,4 +330,14 @@ test("message2event: very large attachment is linked instead of being uploaded",
 	}])
 })
 
-// TODO: read "edits of replies" in the spec
+test("message2event: type 4 channel name change", async t => {
+	const events = await messageToEvent(data.special_message.thread_name_change, data.guild.general)
+	t.deepEqual(events, [{
+		$type: "m.room.message",
+		"m.mentions": {},
+		msgtype: "m.emote",
+		body: "changed the channel name to **worming**",
+		format: "org.matrix.custom.html",
+		formatted_body: "changed the channel name to <strong>worming</strong>"
+	}])
+})

d2m/converters/user-to-mxid.test.js

@@ -16,6 +16,10 @@ test("user2name: works on emojis", t => {
    t.equal(userToSimName({username: "🍪 Cookie Monster 🍪", discriminator: "0001"}), "cookie_monster")
 })
 
+test("user2name: works on single emoji at the end", t => {
+   t.equal(userToSimName({username: "Amanda 🎵", discriminator: "2192"}), "amanda")
+})
+
 test("user2name: works on crazy name", t => {
    t.equal(userToSimName({username: "*** D3 &W (89) _7//-", discriminator: "0001"}), "d3_w_89__7//")
 })
@@ -34,4 +38,4 @@ test("user2name: uses ID if name becomes too short", t => {
 
 test("user2name: uses ID when name has only disallowed characters", t => {
    t.equal(userToSimName({username: "!@#$%^&*", discriminator: "0001", id: "9"}), "9")
-})
+})

d2m/discord-packets.js

@@ -35,6 +35,21 @@ const utils = {
 				arr.push(channel.id)
 				client.channels.set(channel.id, channel)
 			}
+			for (const thread of message.d.threads || []) {
+				// @ts-ignore
+				thread.guild_id = message.d.id
+				arr.push(thread.id)
+				client.channels.set(thread.id, thread)
+			}
+			eventDispatcher.checkMissedMessages(client, message.d)
+
+
+		} else if (message.t === "THREAD_CREATE") {
+			client.channels.set(message.d.id, message.d)
+
+
+		} else if (message.t === "CHANNEL_UPDATE" || message.t === "THREAD_UPDATE") {
+			client.channels.set(message.d.id, message.d)
 
 
 		} else if (message.t === "GUILD_DELETE") {
@@ -67,10 +82,22 @@ const utils = {
 
 		// Event dispatcher for OOYE bridge operations
 		try {
-			if (message.t === "MESSAGE_CREATE") {
+			if (message.t === "CHANNEL_UPDATE") {
+				await eventDispatcher.onChannelOrThreadUpdate(client, message.d, false)
+
+			} else if (message.t === "THREAD_CREATE") {
+				console.log(message)
+				// await eventDispatcher.onThreadCreate(client, message.d)
+
+			} else if (message.t === "THREAD_UPDATE") {
+				await eventDispatcher.onChannelOrThreadUpdate(client, message.d, true)
+
+			} else if (message.t === "MESSAGE_CREATE") {
+				console.log(message)
 				await eventDispatcher.onMessageCreate(client, message.d)
 
 			} else if (message.t === "MESSAGE_UPDATE") {
+				console.log(message)
 				await eventDispatcher.onMessageUpdate(client, message.d)
 
 			} else if (message.t === "MESSAGE_DELETE") {

d2m/event-dispatcher.js

@@ -10,11 +10,17 @@ const editMessage = sync.require("./actions/edit-message")
 const deleteMessage = sync.require("./actions/delete-message")
 /** @type {import("./actions/add-reaction")}) */
 const addReaction = sync.require("./actions/add-reaction")
+/** @type {import("./actions/create-room")}) */
+const createRoom = sync.require("./actions/create-room")
 /** @type {import("../matrix/api")}) */
 const api = sync.require("../matrix/api")
 
 let lastReportedEvent = 0
 
+function isGuildAllowed(guildID) {
+	return ["112760669178241024", "497159726455455754", "1100319549670301727"].includes(guildID)
+}
+
 // Grab Discord events we care about for the bridge, check them, and pass them on
 
 module.exports = {
@@ -29,33 +35,94 @@ module.exports = {
 		console.error(`while handling this ${gatewayMessage.t} gateway event:`)
 		console.dir(gatewayMessage.d, {depth: null})
 
-		if (Date.now() - lastReportedEvent > 5000) {
-			lastReportedEvent = Date.now()
-			const channelID = gatewayMessage.d.channel_id
-			if (channelID) {
-				const roomID = db.prepare("SELECT room_id FROM channel_room WHERE channel_id = ?").pluck().get(channelID)
-				let stackLines = e.stack.split("\n")
-				let cloudstormLine = stackLines.findIndex(l => l.includes("/node_modules/cloudstorm/"))
-				if (cloudstormLine !== -1) {
-					stackLines = stackLines.slice(0, cloudstormLine - 2)
+		if (Date.now() - lastReportedEvent < 5000) return
+		lastReportedEvent = Date.now()
+
+		const channelID = gatewayMessage.d.channel_id
+		if (!channelID) return
+		const roomID = db.prepare("SELECT room_id FROM channel_room WHERE channel_id = ?").pluck().get(channelID)
+		if (!roomID) return
+
+		let stackLines = e.stack.split("\n")
+		let cloudstormLine = stackLines.findIndex(l => l.includes("/node_modules/cloudstorm/"))
+		if (cloudstormLine !== -1) {
+			stackLines = stackLines.slice(0, cloudstormLine - 2)
+		}
+		api.sendEvent(roomID, "m.room.message", {
+			msgtype: "m.text",
+			body: "\u26a0 Bridged event from Discord not delivered. See formatted content for full details.",
+			format: "org.matrix.custom.html",
+			formatted_body: "\u26a0 <strong>Bridged event from Discord not delivered</strong>"
+				+ `<br>Gateway event: ${gatewayMessage.t}`
+				+ `<br>${e.toString()}`
+				+ `<details><summary>Error trace</summary>`
+				+ `<pre>${stackLines.join("\n")}</pre></details>`
+				+ `<details><summary>Original payload</summary>`
+				+ `<pre>${util.inspect(gatewayMessage.d, false, 4, false)}</pre></details>`,
+			"m.mentions": {
+				user_ids: ["@cadence:cadence.moe"]
+			}
+		})
+	},
+
+	/**
+	 * When logging back in, check if we missed any conversations in any channels. Bridge up to 49 missed messages per channel.
+	 * If more messages were missed, only the latest missed message will be posted. TODO: Consider bridging more, or post a warning when skipping history?
+	 * This can ONLY detect new messages, not any other kind of event. Any missed edits, deletes, reactions, etc will not be bridged.
+	 * @param {import("./discord-client")} client
+	 * @param {import("discord-api-types/v10").GatewayGuildCreateDispatchData} guild
+	 */
+	async checkMissedMessages(client, guild) {
+		if (guild.unavailable) return
+		const bridgedChannels = db.prepare("SELECT channel_id FROM channel_room").pluck().all()
+		const prepared = db.prepare("SELECT message_id FROM event_message WHERE channel_id = ? AND message_id = ?").pluck()
+		for (const channel of guild.channels.concat(guild.threads)) {
+			if (!bridgedChannels.includes(channel.id)) continue
+			if (!channel.last_message_id) continue
+			const latestWasBridged = prepared.get(channel.id, channel.last_message_id)
+			if (latestWasBridged) continue
+
+			/** More recent messages come first. */
+			console.log(`[check missed messages] in ${channel.id} (${guild.name} / ${channel.name}) because its last message ${channel.last_message_id} is not in the database`)
+			const messages = await client.snow.channel.getChannelMessages(channel.id, {limit: 50})
+			let latestBridgedMessageIndex = messages.findIndex(m => {
+				return prepared.get(channel.id, m.id)
+			})
+			console.log(`[check missed messages] got ${messages.length} messages; last message that IS bridged is at position ${latestBridgedMessageIndex} in the channel`)
+			if (latestBridgedMessageIndex === -1) latestBridgedMessageIndex = 1 // rather than crawling the ENTIRE channel history, let's just bridge the most recent 1 message to make it up to date.
+			for (let i = Math.min(messages.length, latestBridgedMessageIndex)-1; i >= 0; i--) {
+				const simulatedGatewayDispatchData = {
+					guild_id: guild.id,
+					mentions: [],
+					...messages[i]
 				}
-				api.sendEvent(roomID, "m.room.message", {
-					msgtype: "m.text",
-					body: "\u26a0 Bridged event from Discord not delivered. See formatted content for full details.",
-					format: "org.matrix.custom.html",
-					formatted_body: "\u26a0 <strong>Bridged event from Discord not delivered</strong>"
-						+ `<br>Gateway event: ${gatewayMessage.t}`
-						+ `<pre>${stackLines.join("\n")}</pre>`
-						+ `<details><summary>Original payload</summary>`
-						+ `<pre>${util.inspect(gatewayMessage.d, false, 4, false)}</pre></details>`,
-					"m.mentions": {
-						user_ids: ["@cadence:cadence.moe"]
-					}
-				})
+				await module.exports.onMessageCreate(client, simulatedGatewayDispatchData)
 			}
 		}
 	},
 
+	/**
+	 * @param {import("./discord-client")} client
+	 * @param {import("discord-api-types/v10").APIChannel} thread
+	 */
+	async onThreadCreate(client, thread) {
+		console.log(thread)
+		const parentRoomID = db.prepare("SELECT room_id FROM channel_room WHERE channel_id = ?").get(thread.parent_id)
+		if (!parentRoomID) return // Not interested in a thread if we aren't interested in its wider channel
+		await createRoom.syncRoom(thread.id)
+	},
+
+	/**
+	 * @param {import("./discord-client")} client
+	 * @param {import("discord-api-types/v10").GatewayChannelUpdateDispatchData} channelOrThread
+	 * @param {boolean} isThread
+	 */
+	async onChannelOrThreadUpdate(client, channelOrThread, isThread) {
+		const roomID = db.prepare("SELECT room_id FROM channel_room WHERE channel_id = ?").get(channelOrThread.id)
+		if (!roomID) return // No target room to update the data on
+		await createRoom.syncRoom(channelOrThread.id)
+	},
+
 	/**
 	 * @param {import("./discord-client")} client
 	 * @param {import("discord-api-types/v10").GatewayMessageCreateDispatchData} message
@@ -72,13 +139,13 @@ module.exports = {
 		const channel = client.channels.get(message.channel_id)
 		if (!channel.guild_id) return // Nothing we can do in direct messages.
 		const guild = client.guilds.get(channel.guild_id)
-		if (message.guild_id !== "112760669178241024" && message.guild_id !== "497159726455455754") return // TODO: activate on other servers (requires the space creation flow to be done first)
+		if (!isGuildAllowed(guild.id)) return
 		await sendMessage.sendMessage(message, guild)
 	},
 
 	/**
 	 * @param {import("./discord-client")} client
-	 * @param {import("discord-api-types/v10").GatewayMessageUpdateDispatchData} message
+	 * @param {import("discord-api-types/v10").GatewayMessageUpdateDispatchData} data
 	 */
 	async onMessageUpdate(client, data) {
 		if (data.webhook_id) {
@@ -97,7 +164,7 @@ module.exports = {
 			const channel = client.channels.get(message.channel_id)
 			if (!channel.guild_id) return // Nothing we can do in direct messages.
 			const guild = client.guilds.get(channel.guild_id)
-			if (message.guild_id !== "112760669178241024" && message.guild_id !== "497159726455455754") return // TODO: activate on other servers (requires the space creation flow to be done first)
+			if (!isGuildAllowed(guild.id)) return
 			await editMessage.editMessage(message, guild)
 		}
 	},
@@ -109,7 +176,6 @@ module.exports = {
 	async onReactionAdd(client, data) {
 		if (data.user_id === client.user.id) return // m2d reactions are added by the discord bot user - do not reflect them back to matrix.
 		if (data.emoji.id !== null) return // TODO: image emoji reactions
-		console.log(data)
 		await addReaction.addReaction(data)
 	},
 
@@ -118,7 +184,6 @@ module.exports = {
 	 * @param {import("discord-api-types/v10").GatewayMessageDeleteDispatchData} data
 	 */
 	async onMessageDelete(client, data) {
-		console.log(data)
 		await deleteMessage.deleteMessage(data)
 	}
 }

db/data-for-test.sql

@@ -33,6 +33,7 @@ CREATE TABLE IF NOT EXISTS "channel_room" (
 	"room_id"	TEXT NOT NULL UNIQUE,
 	"name"	TEXT,
 	"nick"	TEXT,
+	"thread_parent"	TEXT,
 	PRIMARY KEY("channel_id")
 );
 CREATE TABLE IF NOT EXISTS "event_message" (
@@ -54,10 +55,10 @@ BEGIN TRANSACTION;
 INSERT INTO guild_space (guild_id, space_id) VALUES
 ('112760669178241024', '!jjWAGMeQdNrVZSSfvz:cadence.moe');
 
-INSERT INTO channel_room (channel_id, room_id, name, nick) VALUES
-('112760669178241024', '!kLRqKKUQXcibIMtOpl:cadence.moe', 'heave', 'main'),
-('497161350934560778', '!edUxjVdzgUvXDUIQCK:cadence.moe', 'amanda-spam', NULL),
-('160197704226439168', '!uCtjHhfGlYbVnPVlkG:cadence.moe', 'the-stanley-parable-channel', 'bots');
+INSERT INTO channel_room (channel_id, room_id, name, nick, thread_parent) VALUES
+('112760669178241024', '!kLRqKKUQXcibIMtOpl:cadence.moe', 'heave', 'main', NULL),
+('497161350934560778', '!edUxjVdzgUvXDUIQCK:cadence.moe', 'amanda-spam', NULL, NULL),
+('160197704226439168', '!uCtjHhfGlYbVnPVlkG:cadence.moe', 'the-stanley-parable-channel', 'bots', NULL);
 
 INSERT INTO sim (discord_id, sim_name, localpart, mxid) VALUES
 ('0', 'bot', '_ooye_bot', '@_ooye_bot:cadence.moe'),

m2d/actions/add-reaction.js

@@ -18,10 +18,12 @@ async function addReaction(event) {
 	// no need to sync the matrix member to the other side. but if I did need to, this is where I'd do it
 
 	let emoji = event.content["m.relates_to"].key // TODO: handle custom text or emoji reactions
-	emoji = encodeURIComponent(emoji)
-	emoji = emoji.replace(/%EF%B8%8F/g, "")
+	let encoded = encodeURIComponent(emoji)
+	let encodedTrimmed = encoded.replace(/%EF%B8%8F/g, "")
 
-	return discord.snow.channel.createReaction(channelID, messageID, emoji)
+	console.log("add reaction from matrix:", emoji, encoded, encodedTrimmed)
+
+	return discord.snow.channel.createReaction(channelID, messageID, encoded)
 }
 
 module.exports.addReaction = addReaction

m2d/actions/channel-webhook.js

@@ -41,19 +41,19 @@ async function ensureWebhook(channelID, forceCreate = false) {
 async function withWebhook(channelID, callback) {
 	const webhook = await ensureWebhook(channelID, false)
 	return callback(webhook).catch(e => {
-		console.error(e)
 		// TODO: check if the error was webhook-related and if webhook.created === false, then: const webhook = ensureWebhook(channelID, true); return callback(webhook)
-		throw new Error(e)
+		throw e
 	})
 }
 
 /**
  * @param {string} channelID
  * @param {DiscordTypes.RESTPostAPIWebhookWithTokenJSONBody & {files?: {name: string, file: Buffer}[]}} data
+ * @param {string} [threadID]
  */
-async function sendMessageWithWebhook(channelID, data) {
+async function sendMessageWithWebhook(channelID, data, threadID) {
    const result = await withWebhook(channelID, async webhook => {
-      return discord.snow.webhook.executeWebhook(webhook.id, webhook.token, data, {wait: true, disableEveryone: true})
+      return discord.snow.webhook.executeWebhook(webhook.id, webhook.token, data, {wait: true, thread_id: threadID, disableEveryone: true})
    })
    return result
 }

m2d/actions/send-event.js

@@ -13,7 +13,13 @@ const eventToMessage = sync.require("../converters/event-to-message")
 /** @param {import("../../types").Event.Outer<any>} event */
 async function sendEvent(event) {
    // TODO: we just assume the bridge has already been created
-	const channelID = db.prepare("SELECT channel_id FROM channel_room WHERE room_id = ?").pluck().get(event.room_id)
+	const row = db.prepare("SELECT channel_id, thread_parent FROM channel_room WHERE room_id = ?").get(event.room_id)
+	let channelID = row.channel_id
+	let threadID = undefined
+	if (row.thread_parent) {
+		threadID = channelID
+		channelID = row.thread_parent // it's the thread's parent... get with the times...
+	}
 
    // no need to sync the matrix member to the other side. but if I did need to, this is where I'd do it
 
@@ -24,7 +30,7 @@ async function sendEvent(event) {
 	const messageResponses = []
 	let eventPart = 0 // 0 is primary, 1 is supporting
 	for (const message of messages) {
-      const messageResponse = await channelWebhook.sendMessageWithWebhook(channelID, message)
+      const messageResponse = await channelWebhook.sendMessageWithWebhook(channelID, message, threadID)
 		db.prepare("INSERT INTO event_message (event_id, event_type, event_subtype, message_id, channel_id, part, source) VALUES (?, ?, ?, ?, ?, ?, 0)").run(event.event_id, event.type, event.content.msgtype || null, messageResponse.id, channelID, eventPart) // source 0 = matrix
 
 		eventPart = 1 // TODO: use more intelligent algorithm to determine whether primary or supporting?

m2d/converters/event-to-message.js

@@ -16,11 +16,25 @@ function eventToMessage(event) {
 	/** @type {(DiscordTypes.RESTPostAPIWebhookWithTokenJSONBody & {files?: {name: string, file: Buffer}[]})[]} */
 	const messages = []
 
+	let displayName = event.sender
+	let avatarURL = undefined
+	const match = event.sender.match(/^@(.*?):/)
+	if (match) {
+		displayName = match[1]
+		// TODO: get the media repo domain and the avatar url from the matrix member event
+	}
+
 	if (event.content.msgtype === "m.text") {
 		messages.push({
 			content: event.content.body,
-			username: event.sender.replace(/^@/, ""),
-			avatar_url: undefined, // TODO: provide the URL to the avatar from the homeserver's content repo
+			username: displayName,
+			avatar_url: avatarURL
+		})
+	} else if (event.content.msgtype === "m.emote") {
+		messages.push({
+			content: `*${displayName} ${event.content.body}*`,
+			username: displayName,
+			avatar_url: avatarURL
 		})
 	}
 

m2d/converters/event-to-message.test.js

@@ -21,7 +21,7 @@ test("event2message: janky test", t => {
 			}
 		}),
 		[{
-			username: "cadence:cadence.moe",
+			username: "cadence",
 			content: "test",
 			avatar_url: undefined
 		}]

m2d/event-dispatcher.js

@@ -1,9 +1,10 @@
 // @ts-check
 
-/**
+/*
  * Grab Matrix events we care about, check them, and bridge them.
  */
 
+const util = require("util")
 const Ty = require("../types")
 const {sync, as} = require("../passthrough")
 
@@ -13,21 +14,58 @@ const sendEvent = sync.require("./actions/send-event")
 const addReaction = sync.require("./actions/add-reaction")
 /** @type {import("./converters/utils")} */
 const utils = sync.require("./converters/utils")
+/** @type {import("../matrix/api")}) */
+const api = sync.require("../matrix/api")
 
-sync.addTemporaryListener(as, "type:m.room.message",
+let lastReportedEvent = 0
+
+function guard(type, fn) {
+	return async function(event, ...args) {
+		try {
+			return await fn(event, ...args)
+		} catch (e) {
+			console.error("hit event-dispatcher's error handler with this exception:")
+			console.error(e) // TODO: also log errors into a file or into the database, maybe use a library for this? or just wing it?
+			console.error(`while handling this ${type} gateway event:`)
+			console.dir(event, {depth: null})
+
+			if (Date.now() - lastReportedEvent < 5000) return
+			lastReportedEvent = Date.now()
+
+			let stackLines = e.stack.split("\n")
+			api.sendEvent(event.room_id, "m.room.message", {
+				msgtype: "m.text",
+				body: "\u26a0 Matrix event not delivered to Discord. See formatted content for full details.",
+				format: "org.matrix.custom.html",
+				formatted_body: "\u26a0 <strong>Matrix event not delivered to Discord</strong>"
+					+ `<br>Event type: ${type}`
+					+ `<br>${e.toString()}`
+					+ `<details><summary>Error trace</summary>`
+					+ `<pre>${stackLines.join("\n")}</pre></details>`
+					+ `<details><summary>Original payload</summary>`
+					+ `<pre>${util.inspect(event, false, 4, false)}</pre></details>`,
+				"m.mentions": {
+					user_ids: ["@cadence:cadence.moe"]
+				}
+			})
+		}
+	}
+}
+
+sync.addTemporaryListener(as, "type:m.room.message", guard("m.room.message",
 /**
  * @param {Ty.Event.Outer<Ty.Event.M_Room_Message>} event it is a m.room.message because that's what this listener is filtering for
  */
 async event => {
 	if (utils.eventSenderIsFromDiscord(event.sender)) return
 	const messageResponses = await sendEvent.sendEvent(event)
-})
+}))
 
-sync.addTemporaryListener(as, "type:m.reaction",
+sync.addTemporaryListener(as, "type:m.reaction", guard("m.reaction",
 /**
  * @param {Ty.Event.Outer<Ty.Event.M_Reaction>} event it is a m.reaction because that's what this listener is filtering for
  */
 async event => {
 	if (utils.eventSenderIsFromDiscord(event.sender)) return
 	await addReaction.addReaction(event)
-})
+}))

notes.md

@@ -9,6 +9,23 @@ A database will be used to store the discord id to matrix event id mapping. Tabl
 
 There needs to be a way to easily manually trigger something later. For example, it should be easy to manually retry sending a message, or check all members for changes, etc.
 
+## Discord's gateway when a new thread is created from an existing message:
+
+1. Regular MESSAGE_CREATE of the message that it's going to branch off in the future. Example ID -6423
+2. It MESSAGE_UPDATEd the ID -6423 with this whole data: {id:-6423,flags: 32,channel_id:-2084,guild_id:-1727} (ID is the message ID it's branching off, channel ID is the parent channel containing the message ID it's branching off)
+3. It THREAD_CREATEd and gave us a channel object with type 11 (public thread) and parent ID -2084 and ID -6423.
+4. It MESSAGE_CREATEd type 21 with blank content and a message reference pointing towards channel -2084 message -6423. (That's the message it branched from in the parent channel.) This MESSAGE_CREATE got ID -4631 (a new ID). Apart from that it's a regular message object.
+5. Finally, as the first "real" message in that thread (which a user must send to create that thread!) it sent a regular message object with a new message ID and a channel ID of -6423.
+
+When viewing this thread, it shows the message branched from at the top, and then the first "real" message right underneath, as separate groups.
+
+## Current manual process for setting up a server
+
+1. Call createSpace.createSpace(discord.guilds.get(GUILD_ID))
+2. Call createRoom.createAllForGuild(GUILD_ID)
+3. Edit source code of event-dispatcher.js isGuildAllowed() and add the guild ID to the list
+4. If developing, make sure SSH port forward is activated, then wait for events to sync over!
+
 ## Transforming content
 
 1. Upload attachments to mxc if they are small enough.

stdin.js

@@ -13,6 +13,7 @@ const registerUser = sync.require("./d2m/actions/register-user")
 const mreq = sync.require("./matrix/mreq")
 const api = sync.require("./matrix/api")
 const sendEvent = sync.require("./m2d/actions/send-event")
+const eventDispatcher = sync.require("./d2m/event-dispatcher")
 const guildID = "112760669178241024"
 
 const extraContext = {}

test/data.js

@@ -816,6 +816,130 @@ module.exports = {
 				format_type: 1,
 				name: "pomu puff"
 			}]
+		},
+		message_in_thread: {
+			type: 0,
+			tts: false,
+			timestamp: "2023-08-19T01:55:02.063000+00:00",
+			referenced_message: null,
+			position: 942,
+			pinned: false,
+			nonce: "1142275498206822400",
+			mentions: [],
+			mention_roles: [],
+			mention_everyone: false,
+			member: {
+				roles: [
+					"112767366235959296",  "118924814567211009",
+					"204427286542417920",  "199995902742626304",
+					"222168467627835392",  "238028326281805825",
+					"259806643414499328",  "265239342648131584",
+					"271173313575780353",  "287733611912757249",
+					"225744901915148298",  "305775031223320577",
+					"318243902521868288",  "348651574924541953",
+					"349185088157777920",  "378402925128712193",
+					"392141548932038658",  "393912152173576203",
+					"482860581670486028",  "495384759074160642",
+					"638988388740890635",  "373336013109461013",
+					"530220455085473813",  "454567553738473472",
+					"790724320824655873",  "1123518980456452097",
+					"1040735082610167858", "695946570482450442",
+					"1123460940935991296", "849737964090556488"
+				],
+				premium_since: null,
+				pending: false,
+				nick: null,
+				mute: false,
+				joined_at: "2015-11-11T09:55:40.321000+00:00",
+				flags: 0,
+				deaf: false,
+				communication_disabled_until: null,
+				avatar: null
+			},
+			id: "1142275501721911467",
+			flags: 0,
+			embeds: [],
+			edited_timestamp: null,
+			content: "don't mind me, posting something for cadence",
+			components: [],
+			channel_id: "910283343378120754",
+			author: {
+				username: "kumaccino",
+				public_flags: 128,
+				id: "113340068197859328",
+				global_name: "kumaccino",
+				discriminator: "0",
+				avatar_decoration_data: null,
+				avatar: "b48302623a12bc7c59a71328f72ccb39"
+			},
+			attachments: [],
+			guild_id: "112760669178241024"
+		}
+	},
+	message_with_embeds: {
+		nothing_but_a_field: {
+			guild_id: "497159726455455754",
+			mentions: [],
+			id: "1141934888862351440",
+			type: 20,
+			content: "",
+			channel_id: "497161350934560778",
+			author: {
+				id: "1109360903096369153",
+				username: "Amanda 🎵",
+				avatar: "d56cd1b26e043ae512edae2214962faa",
+				discriminator: "2192",
+				public_flags: 524288,
+				flags: 524288,
+				bot: true,
+				banner: null,
+				accent_color: null,
+				global_name: null,
+				avatar_decoration_data: null,
+				banner_color: null
+			},
+			attachments: [],
+			embeds: [
+				{
+					type: "rich",
+					color: 3092790,
+					fields: [
+						{
+							name: "Amanda 🎵#2192 <:online:606664341298872324>\nwillow tree, branch 0",
+							value: "**❯ Uptime:**\n3m 55s\n**❯ Memory:**\n64.45MB",
+							inline: false
+						}
+					]
+				}
+			],
+			mention_roles: [],
+			pinned: false,
+			mention_everyone: false,
+			tts: false,
+			timestamp: "2023-08-18T03:21:33.629000+00:00",
+			edited_timestamp: null,
+			flags: 0,
+			components: [],
+			application_id: "1109360903096369153",
+			interaction: {
+				id: "1141934887608254475",
+				type: 2,
+				name: "stats",
+				user: {
+					id: "320067006521147393",
+					username: "papiophidian",
+					avatar: "47a19b0445069b826e136da4df4259bb",
+					discriminator: "0",
+					public_flags: 4194880,
+					flags: 4194880,
+					banner: null,
+					accent_color: null,
+					global_name: "PapiOphidian",
+					avatar_decoration_data: null,
+					banner_color: null
+				}
+			},
+			webhook_id: "1109360903096369153"
 		}
 	},
 	message_update: {
@@ -1219,5 +1343,38 @@ module.exports = {
 			],
 			guild_id: "112760669178241024"
 		}
+	},
+	special_message: {
+		thread_name_change: {
+			id: "1142391602799710298",
+			type: 4,
+			content: "worming",
+			channel_id: "1142271000067706880",
+			author: {
+				id: "772659086046658620",
+				username: "cadence.worm",
+				avatar: "4b5c4b28051144e4c111f0113a0f1cf1",
+				discriminator: "0",
+				public_flags: 0,
+				flags: 0,
+				banner: null,
+				accent_color: null,
+				global_name: "cadence",
+				avatar_decoration_data: null,
+				banner_color: null
+			},
+			attachments: [],
+			embeds: [],
+			mentions: [],
+			mention_roles: [],
+			pinned: false,
+			mention_everyone: false,
+			tts: false,
+			timestamp: "2023-08-19T09:36:22.717000+00:00",
+			edited_timestamp: null,
+			flags: 0,
+			components: [],
+			position: 12
+		}
 	}
 }

test/test.js

@@ -21,6 +21,7 @@ require("../matrix/kstate.test")
 require("../matrix/api.test")
 require("../matrix/read-registration.test")
 require("../d2m/converters/message-to-event.test")
+require("../d2m/converters/message-to-event.embeds.test")
 require("../d2m/converters/edit-to-changes.test")
 require("../d2m/actions/create-room.test")
 require("../d2m/converters/user-to-mxid.test")