begin converting discord attachments and stickers

d2m/actions/send-message.js

@@ -19,16 +19,31 @@ const createRoom = sync.require("../actions/create-room")
 async function sendMessage(message) {
 	assert.ok(message.member)
 
-	const event = messageToEvent.messageToEvent(message)
 	const roomID = await createRoom.ensureRoom(message.channel_id)
+
 	let senderMxid = null
 	if (!message.webhook_id) {
 		senderMxid = await registerUser.ensureSimJoined(message.author, roomID)
 		await registerUser.syncUser(message.author, message.member, message.guild_id, roomID)
 	}
-	const eventID = await api.sendEvent(roomID, "m.room.message", event, senderMxid)
-	db.prepare("INSERT INTO event_message (event_id, message_id, part) VALUES (?, ?, ?)").run(eventID, message.id, 0) // 0 is primary, 1 is supporting
-	return eventID
+
+	const events = await messageToEvent.messageToEvent(message)
+	const eventIDs = []
+	let eventPart = 0 // 0 is primary, 1 is supporting
+	for (const event of events) {
+		const eventType = event.$type
+		/** @type {Pick<typeof event, Exclude<keyof event, "$type">> & { $type?: string }} */
+		const eventWithoutType = {...event}
+		delete eventWithoutType.$type
+
+		const eventID = await api.sendEvent(roomID, eventType, event, senderMxid)
+		db.prepare("INSERT INTO event_message (event_id, message_id, part) VALUES (?, ?, ?)").run(eventID, message.id, eventPart)
+
+		eventPart = 1 // TODO: use more intelligent algorithm to determine whether primary or supporting
+		eventIDs.push(eventID)
+	}
+
+	return eventIDs
 }
 
 module.exports.sendMessage = sendMessage

d2m/converters/message-to-event.js

@@ -2,27 +2,93 @@
 
 const markdown = require("discord-markdown")
 
+const passthrough = require("../../passthrough")
+const { sync, db } = passthrough
+/** @type {import("../../matrix/file")} */
+const file = sync.require("../../matrix/file")
+
 /**
  * @param {import("discord-api-types/v10").APIMessage} message
- * @returns {import("../../types").Event.M_Room_Message}
  */
-function messageToEvent(message) {
+async function messageToEvent(message) {
+	const events = []
+
+	// Text content appears first
 	const body = message.content
 	const html = markdown.toHTML(body, {
-		/* discordCallback: {
-			user: Function,
-			channel: Function,
-			role: Function,
-			everyone: Function,
-			here: Function
-		} */
+		discordCallback: {
+			user: node => {
+				const mxid = db.prepare("SELECT mxid FROM sim WHERE discord_id = ?").pluck().get(node.id)
+				if (mxid) {
+					return "https://matrix.to/#/" + mxid
+				} else {
+					return "@" + node.id
+				}
+			},
+			channel: node => {
+				const roomID = db.prepare("SELECT room_id FROM channel_room WHERE channel_id = ?").pluck().get(node.id)
+				if (roomID) {
+					return "https://matrix.to/#/" + roomID
+				} else {
+					return "#" + node.id
+				}
+			},
+			role: node =>
+				"@&" + node.id,
+			everyone: node =>
+				"@room",
+			here: node =>
+				"@here"
+		}
 	}, null, null)
-	return {
+	const isPlaintext = body === html
+	if (isPlaintext) {
+		events.push({
+			$type: "m.room.message",
+			msgtype: "m.text",
+			body: body
+		})
+	} else {
+		events.push({
+			$type: "m.room.message",
 			msgtype: "m.text",
 			body: body,
 			format: "org.matrix.custom.html",
 			formatted_body: html
+		})
 	}
+
+	// Then attachments
+	const attachmentEvents = await Promise.all(message.attachments.map(async attachment => {
+		// TODO: handle large files differently - link them instead of uploading
+		if (attachment.content_type?.startsWith("image/") && attachment.width && attachment.height) {
+			return {
+				$type: "m.room.message",
+				msgtype: "m.image",
+				url: await file.uploadDiscordFileToMxc(attachment.url),
+				external_url: attachment.url,
+				body: attachment.filename,
+				// TODO: filename: attachment.filename and then use body as the caption
+				info: {
+					mimetype: attachment.content_type,
+					w: attachment.width,
+					h: attachment.height,
+					size: attachment.size
+				}
+			}
+		} else {
+			return {
+				$type: "m.room.message",
+				msgtype: "m.text",
+				body: "Unsupported attachment:\n" + JSON.stringify(attachment, null, 2)
+			}
+		}
+	}))
+	events.push(...attachmentEvents)
+
+	// Then stickers
+
+	return events
 }
 
 module.exports.messageToEvent = messageToEvent

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

@@ -0,0 +1,28 @@
+const {test} = require("supertape")
+const assert = require("assert")
+const {messageToEvent} = require("./message-to-event")
+const data = require("../../test/data")
+
+test("message2event: stickers", async t => {
+   const events = await messageToEvent(data.message.sticker)
+   t.deepEqual(events, [{
+      $type: "m.room.message",
+      msgtype: "m.text",
+      body: "can have attachments too"
+   }, {
+      $type: "m.room.message",
+      msgtype: "m.image",
+      url: "mxc://cadence.moe/ZDCNYnkPszxGKgObUIFmvjus",
+      body: "image.png",
+      external_url: "https://cdn.discordapp.com/attachments/122155380120748034/1106366167486038016/image.png",
+      info: {
+         mimetype: "image/png",
+         w: 333,
+         h: 287,
+         size: 127373,
+      },
+   }, {
+      $type: "m.sticker",
+      todo: "todo"
+   }])
+})

matrix/file.js

@@ -74,7 +74,14 @@ function memberAvatar(guildID, user, member) {
 	return `/guilds/${guildID}/users/${user.id}/avatars/${member.avatar}.png?size=${IMAGE_SIZE}`
 }
 
+function emoji(emojiID, animated) {
+	const base = `/emojis/${emojiID}`
+	if (animated) return base + ".gif"
+	else return base + ".png"
+}
+
 module.exports.guildIcon = guildIcon
 module.exports.userAvatar = userAvatar
 module.exports.memberAvatar = memberAvatar
+module.exports.emoji = emoji
 module.exports.uploadDiscordFileToMxc = uploadDiscordFileToMxc

test/data.js

@@ -6,18 +6,18 @@ module.exports = {
 	channel: {
 		general: {
 			type: 0,
-			topic: 'https://docs.google.com/document/d/blah/edit | I spread, pipe, and whip because it is my will. :headstone:',
+			topic: "https://docs.google.com/document/d/blah/edit | I spread, pipe, and whip because it is my will. :headstone:",
 			rate_limit_per_user: 0,
 			position: 0,
 			permission_overwrites: [],
 			parent_id: null,
 			nsfw: false,
-			name: 'collective-unconscious' ,
-			last_pin_timestamp: '2023-04-06T09:51:57+00:00',
-			last_message_id: '1103832925784514580',
-			id: '112760669178241024',
+			name: "collective-unconscious" ,
+			last_pin_timestamp: "2023-04-06T09:51:57+00:00",
+			last_message_id: "1103832925784514580",
+			id: "112760669178241024",
 			default_thread_rate_limit_per_user: 0,
-			guild_id: '112760669178241024'
+			guild_id: "112760669178241024"
 		}
 	},
 	room: {
@@ -45,41 +45,85 @@ module.exports = {
 	},
 	guild: {
 		general: {
-			owner_id: '112760500130975744',
+			owner_id: "112760500130975744",
 			premium_tier: 3,
 			stickers: [],
 			max_members: 500000,
-			splash: '86a34ed02524b972918bef810087f8e7',
+			splash: "86a34ed02524b972918bef810087f8e7",
 			explicit_content_filter: 0,
 			afk_channel_id: null,
 			nsfw_level: 0,
 			description: null,
-			preferred_locale: 'en-US',
-			system_channel_id: '112760669178241024',
+			preferred_locale: "en-US",
+			system_channel_id: "112760669178241024",
 			mfa_level: 0,
 			/** @type {300} */
 			afk_timeout: 300,
-			id: '112760669178241024',
-			icon: 'a_f83622e09ead74f0c5c527fe241f8f8c',
+			id: "112760669178241024",
+			icon: "a_f83622e09ead74f0c5c527fe241f8f8c",
 			emojis: [],
 			premium_subscription_count: 14,
 			roles: [],
 			discovery_splash: null,
 			default_message_notifications: 1,
-			region: 'deprecated',
+			region: "deprecated",
 			max_video_channel_users: 25,
 			verification_level: 0,
 			application_id: null,
 			premium_progress_bar_enabled: false,
-			banner: 'a_a666ae551605a2d8cda0afd591c0af3a',
+			banner: "a_a666ae551605a2d8cda0afd591c0af3a",
 			features: [],
 			vanity_url_code: null,
 			hub_type: null,
 			public_updates_channel_id: null,
 			rules_channel_id: null,
-			name: 'Psychonauts 3',
+			name: "Psychonauts 3",
 			max_stage_video_channel_users: 300,
 			system_channel_flags: 0|0
 		}
+	},
+	message: {
+		// Display order is text content, attachments, then stickers
+		sticker: {
+			id: "1106366167788044450",
+			type: 0,
+			content: "can have attachments too",
+			channel_id: "122155380120748034",
+			author: {
+				id: "113340068197859328",
+				username: "Cookie 🍪",
+				global_name: null,
+				display_name: null,
+				avatar: "b48302623a12bc7c59a71328f72ccb39",
+				discriminator: "7766",
+				public_flags: 128,
+				avatar_decoration: null
+			},
+			attachments: [{
+				id: "1106366167486038016",
+				filename: "image.png",
+				size: 127373,
+				url: "https://cdn.discordapp.com/attachments/122155380120748034/1106366167486038016/image.png",
+				proxy_url: "https://media.discordapp.net/attachments/122155380120748034/1106366167486038016/image.png",
+				width: 333,
+				height: 287,
+				content_type: "image/png"
+			}],
+			embeds: [],
+			mentions: [],
+			mention_roles: [],
+			pinned: false,
+			mention_everyone: false,
+			tts: false,
+			timestamp: "2023-05-11T23:44:09.690000+00:00",
+			edited_timestamp: null,
+			flags: 0,
+			components: [],
+			sticker_items: [{
+				id: "1106323941183717586",
+				format_type: 1,
+				name: "pomu puff"
+			}]
+		 }
 	}
 }

test/test.js

@@ -14,5 +14,6 @@ Object.assign(passthrough, { config, sync, db })
 require("../matrix/kstate.test")
 require("../matrix/api.test")
 require("../matrix/read-registration.test")
+require("../d2m/converters/message-to-event.test")
 require("../d2m/actions/create-room.test")
 require("../d2m/converters/user-to-mxid.test")