glue

m2d/actions/channel-webhook.js

@@ -1,6 +1,7 @@
 // @ts-check
 
 const assert = require("assert").strict
+const DiscordTypes = require("discord-api-types/v10")
 const passthrough = require("../../passthrough")
 const {discord, db} = passthrough
 
@@ -46,5 +47,17 @@ async function withWebhook(channelID, callback) {
 	})
 }
 
+/**
+ * @param {string} channelID
+ * @param {DiscordTypes.RESTPostAPIWebhookWithTokenJSONBody & {files?: {name: string, file: Buffer}[]}[]} data
+ */
+async function sendMessageWithWebhook(channelID, data) {
+   const result = await withWebhook(channelID, async webhook => {
+      return discord.snow.webhook.executeWebhook(webhook.id, webhook.token, data, {wait: true, disableEveryone: true})
+   })
+   return result
+}
+
 module.exports.ensureWebhook = ensureWebhook
 module.exports.withWebhook = withWebhook
+module.exports.sendMessageWithWebhook = sendMessageWithWebhook

m2d/actions/send-event.js

@@ -0,0 +1,43 @@
+// @ts-check
+
+const assert = require("assert").strict
+const DiscordTypes = require("discord-api-types/v10")
+const passthrough = require("../../passthrough")
+const {sync, discord, db} = passthrough
+
+/** @type {import("./channel-webhook")} */
+const channelWebhook = sync.require("./channel-webhook")
+/** @type {import("../converters/event-to-message")} */
+const eventToMessage = sync.require("../converters/event-to-message")
+
+/** @param {import("../../types").Event.Outer<any>} event */
+async function sendEvent(event) {
+   // TODO: matrix equivalents...
+	const roomID = await createRoom.ensureRoom(message.channel_id)
+   // TODO: no need to sync the member to the other side... right?
+	let senderMxid = null
+	if (!message.webhook_id) {
+		assert(message.member)
+		senderMxid = await registerUser.ensureSimJoined(message.author, roomID)
+		await registerUser.syncUser(message.author, message.member, message.guild_id, roomID)
+	}
+
+	const messages = eventToMessage.eventToMessage(event)
+   assert(Array.isArray(messages))
+
+   /** @type {DiscordTypes.APIMessage[]} */
+	const messageResponses = []
+	let eventPart = 0 // 0 is primary, 1 is supporting
+	for (const message of messages) {
+      const messageResponse = await channelWebhook.sendMessageWithWebhook(channelID, message)
+      // TODO: are you sure about that? many to many? and we don't need to store which side it originated from?
+		db.prepare("INSERT INTO event_message (event_id, message_id, part) VALUES (?, ?, ?)").run(event.event_id, messageResponse.id, eventPart)
+
+		eventPart = 1 // TODO: use more intelligent algorithm to determine whether primary or supporting
+		messageResponses.push(messageResponse)
+	}
+
+	return messageResponses
+}
+
+module.exports.sendEvent = sendEvent

m2d/actions/send-message.js

@@ -1,23 +0,0 @@
-// @ts-check
-
-const assert = require("assert").strict
-const DiscordTypes = require("discord-api-types/v10")
-const passthrough = require("../../passthrough")
-const {sync, discord, db} = passthrough
-
-/** @type {import("./register-webhook")} */
-const registerWebhook = sync.require("./register-webhook")
-
-/**
- * @param {string} channelID
- * @param {DiscordTypes.RESTPostAPIWebhookWithTokenJSONBody & {files?: {name: string, file: Buffer}[]}[]} data
- */
-// param {DiscordTypes.RESTPostAPIWebhookWithTokenQuery & {wait: true, disableEveryone?: boolean}} options
-async function sendMessage(channelID, data) {
-   const result = await registerWebhook.withWebhook(channelID, async webhook => {
-      return discord.snow.webhook.executeWebhook(webhook.id, webhook.token, data, {wait: true, disableEveryone: true})
-   })
-   return result
-}
-
-module.exports.sendMessage = sendMessage

m2d/event-dispatcher.js

@@ -1,12 +1,37 @@
 // @ts-check
 
+/**
+ * Grab Matrix events we care about, check them, and bridge them.
+ */
+
 const assert = require("assert").strict
 const {sync, as} = require("../passthrough")
+const reg = require("../matrix/read-registration")
+/** @type {import("./actions/send-event")} */
+const sendEvent = sync.require("./actions/send-event")
 
-// Grab Matrix events we care about for the bridge, check them, and pass them on
+const userRegex = reg.namespaces.users.map(u => new RegExp(u.regex))
+/**
+ * Determine whether an event is the bridged representation of a discord message.
+ * Such messages shouldn't be bridged again.
+ * @param {import("../types").Event.Outer<any>} event
+ */
+function eventOriginatedFromDiscord(event) {
+	if (
+		// If it's from a user in the bridge's namespace...
+		userRegex.some(x => event.sender.match(x))
+		// ...not counting the appservice's own user...
+		&& !event.sender.startsWith(`@${reg.sender_localpart}:`)
+	) {
+		// ...then it originated from discord
+		return true
+	}
+
+	return false
+}
 
 sync.addTemporaryListener(as, "type:m.room.message", event => {
 	console.log(event)
-	// TODO: filter out events that were bridged discord messages (i.e. sent by OOYE)
-	// TODO: call sendMessage
+	if (eventOriginatedFromDiscord(event)) return
+	const messageResponses = sendEvent.sendEvent(event)
 })

types.d.ts

@@ -5,6 +5,16 @@ export type AppServiceRegistrationConfig = {
 	url: string
 	sender_localpart: string
 	namespace_prefix: string
+	namespaces: {
+		users: {
+			exclusive: boolean
+			regex: string
+		}[]
+		aliases: {
+			exclusive: boolean
+			regex: string
+		}[]
+	}
 	protocols: [string]
 	rate_limited: boolean
 }
@@ -23,8 +33,6 @@ namespace Event {
 		origin_server_ts: number
 		unsigned: any
 		event_id: string
-		user_id: string
-		age: number
 	}
 
 	export type BaseStateEvent = {