Support embed generate MESSAGE_UPDATE events

d2m/converters/edit-to-changes.js

@@ -3,13 +3,22 @@
 const assert = require("assert").strict
 
 const passthrough = require("../../passthrough")
-const {discord, sync, db, select, from} = passthrough
+const {sync, select, from} = passthrough
 /** @type {import("./message-to-event")} */
 const messageToEvent = sync.require("../converters/message-to-event")
-/** @type {import("../actions/register-user")} */
+
-const registerUser = sync.require("../actions/register-user")
+function eventCanBeEdited(ev) {
-/** @type {import("../actions/create-room")} */
+	// Discord does not allow files, images, attachments, or videos to be edited.
-const createRoom = sync.require("../actions/create-room")
+	if (ev.old.event_type === "m.room.message" && ev.old.event_subtype !== "m.text" && ev.old.event_subtype !== "m.emote" && ev.old.event_subtype !== "m.notice") {
+		return false
+	}
+	// Discord does not allow stickers to be edited.
+	if (ev.old.event_type === "m.sticker") {
+		return false
+	}
+	// Anything else is fair game.
+	return true
+}
 
 /**
  * @param {import("discord-api-types/v10").GatewayMessageCreateDispatchData} message
@@ -19,12 +28,16 @@ const createRoom = sync.require("../actions/create-room")
  * @param {import("../../matrix/api")} api simple-as-nails dependency injection for the matrix API
  */
 async function editToChanges(message, guild, api) {
+	// If it is a user edit, allow deleting old messages (e.g. they might have removed text from an image). If it is the system adding a generated embed to a message, don't delete old messages since the system only sends partial data.
+
+	const isGeneratedEmbed = !("content" in message)
+
 	// Figure out what events we will be replacing
 
 	const roomID = select("channel_room", "room_id", {channel_id: message.channel_id}).pluck().get()
 	assert(roomID)
 	/** @type {string?} Null if we don't have a sender in the room, which will happen if it's a webhook's message. The bridge bot will do the edit instead. */
-	const senderMxid = from("sim").join("sim_member", "mxid").where({user_id: message.author.id, room_id: roomID}).pluck("mxid").get() || null
+	const senderMxid = message.author && from("sim").join("sim_member", "mxid").where({user_id: message.author.id, room_id: roomID}).pluck("mxid").get() || null
 
 	const oldEventRows = select("event_message", ["event_id", "event_type", "event_subtype", "part", "reaction_part"], {message_id: message.id}).all()
 
@@ -48,7 +61,8 @@ async function editToChanges(message, guild, api) {
 	let eventsToRedact = []
 	/** 3. Events that are present in the new version only, and should be sent as new, with references back to the context */
 	let eventsToSend = []
-	//  4. Events that are matched and have definitely not changed, so they don't need to be edited or replaced at all. This is represented as nothing.
+	/**  4. Events that are matched and have definitely not changed, so they don't need to be edited or replaced at all. */
+	let unchangedEvents = []
 
 	function shift() {
 		newFallbackContent.shift()
@@ -81,22 +95,35 @@ async function editToChanges(message, guild, api) {
 		shift()
 	}
 	// Anything remaining in oldEventRows is present in the old version only and should be redacted.
-	eventsToRedact = oldEventRows
+	eventsToRedact = oldEventRows.map(e => ({old: e}))
+
+	// If this is a generated embed update, only allow the embeds to be updated, since the system only sends data about events. Ignore changes to other things.
+	if (isGeneratedEmbed) {
+		unchangedEvents.push(...eventsToRedact.filter(e => e.old.event_subtype !== "m.notice")) // Move them from eventsToRedact to unchangedEvents.
+		eventsToRedact = eventsToRedact.filter(e => e.old.event_subtype === "m.notice")
+	}
+
+	// Now, everything in eventsToSend and eventsToRedact is a real change, but everything in eventsToReplace might not have actually changed!
+	// (Example: a MESSAGE_UPDATE for a text+image message - Discord does not allow the image to be changed, but the text might have been.)
+	// So we'll remove entries from eventsToReplace that *definitely* cannot have changed. (This is category 4 mentioned above.) Everything remaining *may* have changed.
+	unchangedEvents.push(...eventsToReplace.filter(ev => !eventCanBeEdited(ev))) // Move them from eventsToRedact to unchangedEvents.
+	eventsToReplace = eventsToReplace.filter(eventCanBeEdited)
 
 	// We want to maintain exactly one part = 0 and one reaction_part = 0 database row at all times.
 	/** @type {({column: string, eventID: string} | {column: string, nextEvent: true})[]} */
 	const promotions = []
 	for (const column of ["part", "reaction_part"]) {
+		const candidatesForParts = unchangedEvents.concat(eventsToReplace)
 		// If no events with part = 0 exist (or will exist), we need to do some management.
-		if (!eventsToReplace.some(e => e.old[column] === 0)) {
+		if (!candidatesForParts.some(e => e.old[column] === 0)) {
-			if (eventsToReplace.length) {
+			if (candidatesForParts.length) {
 				// We can choose an existing event to promote. Bigger order is better.
-				const order = e => 2*+(e.event_type === "m.room.message") + 1*+(e.event_subtype === "m.text")
+				const order = e => 2*+(e.event_type === "m.room.message") + 1*+(e.old.event_subtype === "m.text")
-				eventsToReplace.sort((a, b) => order(b) - order(a))
+				candidatesForParts.sort((a, b) => order(b) - order(a))
 				if (column === "part") {
-					promotions.push({column, eventID: eventsToReplace[0].old.event_id}) // part should be the first one
+					promotions.push({column, eventID: candidatesForParts[0].old.event_id}) // part should be the first one
 				} else {
-					promotions.push({column, eventID: eventsToReplace[eventsToReplace.length - 1].old.event_id}) // reaction_part should be the last one
+					promotions.push({column, eventID: candidatesForParts[candidatesForParts.length - 1].old.event_id}) // reaction_part should be the last one
 				}
 			} else {
 				// No existing events to promote, but new events are being sent. Whatever gets sent will be the next part = 0.
@@ -105,24 +132,8 @@ async function editToChanges(message, guild, api) {
 		}
 	}
 
-	// Now, everything in eventsToSend and eventsToRedact is a real change, but everything in eventsToReplace might not have actually changed!
-	// (Example: a MESSAGE_UPDATE for a text+image message - Discord does not allow the image to be changed, but the text might have been.)
-	// So we'll remove entries from eventsToReplace that *definitely* cannot have changed. (This is category 4 mentioned above.) Everything remaining *may* have changed.
-	eventsToReplace = eventsToReplace.filter(ev => {
-		// Discord does not allow files, images, attachments, or videos to be edited.
-		if (ev.old.event_type === "m.room.message" && ev.old.event_subtype !== "m.text" && ev.old.event_subtype !== "m.emote" && ev.old.event_subtype !== "m.notice") {
-			return false
-		}
-		// Discord does not allow stickers to be edited.
-		if (ev.old.event_type === "m.sticker") {
-			return false
-		}
-		// Anything else is fair game.
-		return true
-	})
-
 	// Removing unnecessary properties before returning
-	eventsToRedact = eventsToRedact.map(e => e.event_id)
+	eventsToRedact = eventsToRedact.map(e => e.old.event_id)
 	eventsToReplace = eventsToReplace.map(e => ({oldID: e.old.event_id, newContent: makeReplacementEventContent(e.old.event_id, e.newFallbackContent, e.newInnerContent)}))
 
 	return {roomID, eventsToReplace, eventsToRedact, eventsToSend, senderMxid, promotions}

d2m/converters/edit-to-changes.test.js

@@ -235,3 +235,28 @@ test("edit2changes: promotes the text event when multiple rows have part = 1 (sh
 		}
 	])
 })
+
+test("edit2changes: generated embed", async t => {
+	const {eventsToRedact, eventsToReplace, eventsToSend, promotions} = await editToChanges(data.message_update.embed_generated_social_media_image, data.guild.general, {})
+	t.deepEqual(eventsToRedact, [])
+	t.deepEqual(eventsToReplace, [])
+	t.deepEqual(eventsToSend, [{
+		$type: "m.room.message",
+		msgtype: "m.notice",
+		body: "| via hthrflwrs on cohost"
+			+ "\n| \n| ## This post nerdsniped me, so here's some RULES FOR REAL-LIFE BALATRO https://cohost.org/jkap/post/4794219-empty"
+			+ "\n| \n| 1v1 physical card game. Each player gets one standard deck of cards with a different backing to differentiate. Every turn proceeds as follows:"
+			+ "\n| \n|  * Both players draw eight cards"
+			+ "\n|  * Both players may choose up to eight cards to discard, then draw that number of cards to put back in their hand"
+			+ "\n|  * Both players present their best five-or-less-card pok...",
+		format: "org.matrix.custom.html",
+		formatted_body: `<blockquote><p><sub>hthrflwrs on cohost</sub>`
+			+ `</p><p><strong><a href="https://cohost.org/jkap/post/4794219-empty">This post nerdsniped me, so here's some RULES FOR REAL-LIFE BALATRO</a></strong>`
+			+ `</p><p>1v1 physical card game. Each player gets one standard deck of cards with a different backing to differentiate. Every turn proceeds as follows:`
+			+ `<br><br><ul><li>Both players draw eight cards`
+			+ `</li><li>Both players may choose up to eight cards to discard, then draw that number of cards to put back in their hand`
+			+ `</li><li>Both players present their best five-or-less-card pok...</li></ul></p></blockquote>`,
+		"m.mentions": {}
+	}])
+	t.deepEqual(promotions, []) // TODO: it would be ideal to promote this to reaction_part = 0. this is OK to do because the main message won't have had any reactions yet.
+})

d2m/converters/message-to-event.js

@@ -480,6 +480,8 @@ async function messageToEvent(message, guild, options = {}, di) {
 		message.content = "changed the channel name to **" + message.content + "**"
 	}
 
+
+	if (message.content) {
 		// Mentions scenario 3: scan the message content for written @mentions of matrix users. Allows for up to one space between @ and mention.
 		const matches = [...message.content.matchAll(/@ ?([a-z0-9._]+)\b/gi)]
 		if (matches.length && matches.some(m => m[1].match(/[a-z]/i) && m[1] !== "everyone" && m[1] !== "here")) {
@@ -498,14 +500,15 @@ async function messageToEvent(message, guild, options = {}, di) {
 		}
 
 		// Text content appears first
-	if (message.content) {
 		const {body, html} = await transformContent(message.content)
 		await addTextEvent(body, html, msgtype, {scanMentions: true})
 	}
 
 	// Then attachments
+	if (message.attachments) {
 		const attachmentEvents = await Promise.all(message.attachments.map(attachmentToEvent.bind(null, mentions)))
 		events.push(...attachmentEvents)
+	}
 
 	// Then embeds
 	for (const embed of message.embeds || []) {

test/data.js

@@ -3469,6 +3469,31 @@ module.exports = {
 				}
 			],
 			guild_id: "112760669178241024"
+		},
+		embed_generated_social_media_image: {
+			channel_id: "112760669178241024",
+			embeds: [
+				{
+					color: 8594767,
+					description: "1v1 physical card game. Each player gets one standard deck of cards with a different backing to differentiate. Every turn proceeds as follows:\n\n * Both players draw eight cards\n * Both players may choose up to eight cards to discard, then draw that number of cards to put back in their hand\n * Both players present their best five-or-less-card pok...",
+					provider: {
+						name: "hthrflwrs on cohost"
+					},
+					thumbnail: {
+						height: 1587,
+						placeholder: "GpoKP5BJZphshnhwmmmYlmh3l7+m+mwJ",
+						placeholder_version: 1,
+						proxy_url: "https://images-ext-2.discordapp.net/external/9vTXIzlXU4wyUZvWfmlmQkck8nGLUL-A090W4lWsZ48/https/staging.cohostcdn.org/avatar/292-6b64b03c-4ada-42f6-8452-109275bfe68d-profile.png",
+						url: "https://staging.cohostcdn.org/avatar/292-6b64b03c-4ada-42f6-8452-109275bfe68d-profile.png",
+						width: 1644
+					},
+					title: "This post nerdsniped me, so here's some RULES FOR REAL-LIFE BALATRO",
+					type: "link",
+					url: "https://cohost.org/jkap/post/4794219-empty"
+				}
+			],
+			guild_id: "112760669178241024",
+			id: "1210387798297682020"
 		}
 	},
 	special_message: {

test/ooye-test-data.sql

@@ -53,7 +53,8 @@ INSERT INTO message_channel (message_id, channel_id) VALUES
 ('1158842413025071135', '176333891320283136'),
 ('1197612733600895076', '112760669178241024'),
 ('1202543413652881428', '1160894080998461480'),
-('1207486471489986620', '1160894080998461480');
+('1207486471489986620', '1160894080998461480'),
+('1210387798297682020', '112760669178241024');
 
 INSERT INTO event_message (event_id, event_type, event_subtype, message_id, part, reaction_part, source) VALUES
 ('$X16nfVks1wsrhq4E9SSLiqrf2N8KD0erD0scZG7U5xg', 'm.room.message', 'm.text', '1126786462646550579', 0, 0, 1),
@@ -87,7 +88,8 @@ INSERT INTO event_message (event_id, event_type, event_subtype, message_id, part
 ('$dVCLyj6kxb3DaAWDtjcv2kdSny8JMMHdDhCMz8mDxVo', 'm.room.message', 'm.text', '1158842413025071135', 0, 0, 1),
 ('$7tJoMw1h44n2gxgLUE1T_YinGrLbK0x-TDY1z6M7GBw', 'm.room.message', 'm.text', '1197612733600895076', 0, 0, 1),
 ('$NB6nPgO2tfXyIwwDSF0Ga0BUrsgX1S-0Xl-jAvI8ucU', 'm.room.message', 'm.text', '1202543413652881428', 0, 0, 0),
-('$OEEK-Wam2FTh6J-6kVnnJ6KnLA_lLRnLTHatKKL62-Y', 'm.room.message', 'm.image', '1207486471489986620', 0, 0, 0);
+('$OEEK-Wam2FTh6J-6kVnnJ6KnLA_lLRnLTHatKKL62-Y', 'm.room.message', 'm.image', '1207486471489986620', 0, 0, 0),
+('$mPSzglkCu-6cZHbYro0RW2u5mHvbH9aXDjO5FCzosc0', 'm.room.message', 'm.text', '1210387798297682020', 0, 0, 1);
 
 INSERT INTO file (discord_url, mxc_url) VALUES
 ('https://cdn.discordapp.com/attachments/497161332244742154/1124628646431297546/image.png', 'mxc://cadence.moe/qXoZktDqNtEGuOCZEADAMvhM'),