Improve Matrix info and add alternative access

React with red question mark to get a DM of the author info, like PK.

src/discord/interactions/matrix-info.js

@@ -7,12 +7,18 @@ const assert = require("assert").strict
 /** @type {import("../../matrix/api")} */
 const api = sync.require("../../matrix/api")
 
+/** @type {import("../../matrix/utils")} */
+const utils = sync.require("../../matrix/utils")
+
+/** @type {import("../../web/routes/guild")} */
+const webGuild = sync.require("../../web/routes/guild")
+
 /**
  * @param {DiscordTypes.APIMessageApplicationCommandGuildInteraction} interaction
  * @param {{api: typeof api}} di
  * @returns {Promise<DiscordTypes.APIInteractionResponse>}
  */
-async function _interact({guild_id, channel, data}, {api}) {
+async function _interact({guild_id, data}, {api}) {
 	const message = from("event_message").join("message_room", "message_id").join("historical_channel_room", "historical_room_index")
 		.select("source", "reference_channel_id", "room_id", "event_id").where({message_id: data.target_id, part: 0}).get()
 
@@ -47,11 +53,32 @@ async function _interact({guild_id, channel, data}, {api}) {
 
 	// from Matrix
 	const event = await api.getEvent(message.room_id, message.event_id)
+	const via = await utils.getViaServersQuery(message.room_id, api)
+	const inChannels = discord.guildChannelMap.get(guild_id)
+		.map(cid => discord.channels.get(cid))
+		.sort((a, b) => webGuild._getPosition(a, discord.channels) - webGuild._getPosition(b, discord.channels))
+		.filter(channel => from("channel_room").join("member_cache", "room_id").select("mxid").where({channel_id: channel.id, mxid: event.sender}).get())
+	const matrixMember = select("member_cache", ["displayname", "avatar_url"], {room_id: message.room_id, mxid: event.sender}).get()
+	const name = matrixMember?.displayname || event.sender
 	return {
 		type: DiscordTypes.InteractionResponseType.ChannelMessageWithSource,
 		data: {
-			content: `Bridged [${event.sender}](<https://matrix.to/#/${event.sender}>)'s message in [${roomName}](<https://matrix.to/#/${message.room_id}/${message.event_id}>) on Matrix to https://discord.com/channels/${guild_id}/${channel_id}/${data.target_id} on Discord.`
-				+ idInfo,
+			embeds: [{
+				author: {
+					name,
+					url: `https://matrix.to/#/${event.sender}`,
+					icon_url: utils.getPublicUrlForMxc(matrixMember.avatar_url)
+				},
+				description: `This Matrix message was delivered to Discord by **Out Of Your Element**.\n[View on Matrix →](<https://matrix.to/#/${message.room_id}/${message.event_id}?${via}>)\n\n**User ID**: [${event.sender}](<https://matrix.to/#/${event.sender}>)`,
+				color: 0x0dbd8b,
+				fields: [{
+					name: "In Channels",
+					value: inChannels.map(c => `<#${c.id}>`).join(" • ")
+				}, {
+					name: "\u200b",
+					value: idInfo
+				}]
+			}],
 			flags: DiscordTypes.MessageFlags.Ephemeral
 		}
 	}
@@ -64,5 +91,15 @@ async function interact(interaction) {
 	await discord.snow.interaction.createInteractionResponse(interaction.id, interaction.token, await _interact(interaction, {api}))
 }
 
+/** @param {DiscordTypes.APIMessageApplicationCommandGuildInteraction} interaction */
+async function dm(interaction) {
+	const channel = await discord.snow.user.createDirectMessageChannel(interaction.member.user.id)
+	const response = await _interact(interaction, {api})
+	assert(response.type === DiscordTypes.InteractionResponseType.ChannelMessageWithSource)
+	response.data.flags &= 0 // not ephemeral
+	await discord.snow.channel.createMessage(channel.id, response.data)
+}
+
 module.exports.interact = interact
 module.exports._interact = _interact
+module.exports.dm = dm