342 lines
15 KiB
JavaScript
342 lines
15 KiB
JavaScript
// @ts-check
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const assert = require("assert").strict
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const DiscordTypes = require("discord-api-types/v10")
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const util = require("util")
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const {sync, db, select, from} = require("../passthrough")
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/** @type {import("./actions/send-message")}) */
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const sendMessage = sync.require("./actions/send-message")
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/** @type {import("./actions/edit-message")}) */
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const editMessage = sync.require("./actions/edit-message")
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/** @type {import("./actions/delete-message")}) */
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const deleteMessage = sync.require("./actions/delete-message")
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/** @type {import("./actions/add-reaction")}) */
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const addReaction = sync.require("./actions/add-reaction")
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/** @type {import("./actions/remove-reaction")}) */
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const removeReaction = sync.require("./actions/remove-reaction")
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/** @type {import("./actions/announce-thread")}) */
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const announceThread = sync.require("./actions/announce-thread")
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/** @type {import("./actions/create-room")}) */
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const createRoom = sync.require("./actions/create-room")
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/** @type {import("./actions/create-space")}) */
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const createSpace = sync.require("./actions/create-space")
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/** @type {import("./actions/update-pins")}) */
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const updatePins = sync.require("./actions/update-pins")
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/** @type {import("../matrix/api")}) */
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const api = sync.require("../matrix/api")
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/** @type {import("../discord/utils")} */
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const dUtils = sync.require("../discord/utils")
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/** @type {import("../discord/discord-command-handler")}) */
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const discordCommandHandler = sync.require("../discord/discord-command-handler")
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/** @type {import("../m2d/converters/utils")} */
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const mxUtils = require("../m2d/converters/utils")
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/** @type {import("./actions/speedbump")} */
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const speedbump = sync.require("./actions/speedbump")
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/** @type {any} */ // @ts-ignore bad types from semaphore
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const Semaphore = require("@chriscdn/promise-semaphore")
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const checkMissedPinsSema = new Semaphore()
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let lastReportedEvent = 0
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// Grab Discord events we care about for the bridge, check them, and pass them on
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module.exports = {
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/**
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* @param {import("./discord-client")} client
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* @param {Error} e
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* @param {import("cloudstorm").IGatewayMessage} gatewayMessage
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*/
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onError(client, e, gatewayMessage) {
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console.error("hit event-dispatcher's error handler with this exception:")
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console.error(e) // TODO: also log errors into a file or into the database, maybe use a library for this? or just wing it? definitely need to be able to store the formatted event body to load back in later
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console.error(`while handling this ${gatewayMessage.t} gateway event:`)
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console.dir(gatewayMessage.d, {depth: null})
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if (gatewayMessage.t === "TYPING_START") return
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if (Date.now() - lastReportedEvent < 5000) return
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lastReportedEvent = Date.now()
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const channelID = gatewayMessage.d["channel_id"]
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if (!channelID) return
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const roomID = select("channel_room", "room_id", {channel_id: channelID}).pluck().get()
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if (!roomID) return
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let stackLines = null
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if (e.stack) {
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stackLines = e.stack.split("\n")
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let cloudstormLine = stackLines.findIndex(l => l.includes("/node_modules/cloudstorm/"))
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if (cloudstormLine !== -1) {
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stackLines = stackLines.slice(0, cloudstormLine - 2)
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}
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}
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const builder = new mxUtils.MatrixStringBuilder()
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builder.addLine("\u26a0 Bridged event from Discord not delivered", "\u26a0 <strong>Bridged event from Discord not delivered</strong>")
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builder.addLine(`Gateway event: ${gatewayMessage.t}`)
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builder.addLine(e.toString())
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if (stackLines) {
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builder.addLine(`Error trace:\n${stackLines.join("\n")}`, `<details><summary>Error trace</summary><pre>${stackLines.join("\n")}</pre></details>`)
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}
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builder.addLine("", `<details><summary>Original payload</summary><pre>${util.inspect(gatewayMessage.d, false, 4, false)}</pre></details>`)
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api.sendEvent(roomID, "m.room.message", {
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...builder.get(),
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"moe.cadence.ooye.error": {
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source: "discord",
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payload: gatewayMessage
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},
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"m.mentions": {
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user_ids: ["@cadence:cadence.moe"]
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}
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})
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},
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/**
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* When logging back in, check if we missed any conversations in any channels. Bridge up to 49 missed messages per channel.
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* If more messages were missed, only the latest missed message will be posted. TODO: Consider bridging more, or post a warning when skipping history?
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* This can ONLY detect new messages, not any other kind of event. Any missed edits, deletes, reactions, etc will not be bridged.
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayGuildCreateDispatchData} guild
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*/
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async checkMissedMessages(client, guild) {
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if (guild.unavailable) return
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const bridgedChannels = select("channel_room", "channel_id").pluck().all()
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const prepared = select("event_message", "event_id", {}, "WHERE message_id = ?").pluck()
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for (const channel of guild.channels.concat(guild.threads)) {
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if (!bridgedChannels.includes(channel.id)) continue
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if (!("last_message_id" in channel) || !channel.last_message_id) continue
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const latestWasBridged = prepared.get(channel.last_message_id)
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if (latestWasBridged) continue
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// Permissions check
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const member = guild.members.find(m => m.user?.id === client.user.id)
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if (!member) return
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if (!("permission_overwrites" in channel)) continue
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const permissions = dUtils.getPermissions(member.roles, guild.roles, client.user.id, channel.permission_overwrites)
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const wants = BigInt(1 << 10) | BigInt(1 << 16) // VIEW_CHANNEL + READ_MESSAGE_HISTORY
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if ((permissions & wants) !== wants) continue // We don't have permission to look back in this channel
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/** More recent messages come first. */
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// 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`)
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let messages
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try {
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messages = await client.snow.channel.getChannelMessages(channel.id, {limit: 50})
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} catch (e) {
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if (e.message === `{"message": "Missing Access", "code": 50001}`) { // pathetic error handling from SnowTransfer
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console.log(`[check missed messages] no permissions to look back in channel ${channel.name} (${channel.id})`)
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continue // Sucks.
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} else {
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throw e // Sucks more.
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}
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}
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let latestBridgedMessageIndex = messages.findIndex(m => {
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return prepared.get(m.id)
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})
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// console.log(`[check missed messages] got ${messages.length} messages; last message that IS bridged is at position ${latestBridgedMessageIndex} in the channel`)
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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.
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for (let i = Math.min(messages.length, latestBridgedMessageIndex)-1; i >= 0; i--) {
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const simulatedGatewayDispatchData = {
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guild_id: guild.id,
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backfill: true,
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...messages[i]
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}
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await module.exports.onMessageCreate(client, simulatedGatewayDispatchData)
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}
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}
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},
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/**
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* When logging back in, check if the pins on Matrix-side are up to date. If they aren't, update all pins.
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* Rather than query every room on Matrix-side, we cache the latest pinned message in the database and compare against that.
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayGuildCreateDispatchData} guild
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*/
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async checkMissedPins(client, guild) {
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if (guild.unavailable) return
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const member = guild.members.find(m => m.user?.id === client.user.id)
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if (!member) return
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for (const channel of guild.channels) {
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if (!("last_pin_timestamp" in channel) || !channel.last_pin_timestamp) continue // Only care about channels that have pins
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if (!("permission_overwrites" in channel)) continue
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const lastPin = updatePins.convertTimestamp(channel.last_pin_timestamp)
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// Permissions check
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const permissions = dUtils.getPermissions(member.roles, guild.roles, client.user.id, channel.permission_overwrites)
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const wants = BigInt(1 << 10) | BigInt(1 << 16) // VIEW_CHANNEL + READ_MESSAGE_HISTORY
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if ((permissions & wants) !== wants) continue // We don't have permission to look up the pins in this channel
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const row = select("channel_room", ["room_id", "last_bridged_pin_timestamp"], {channel_id: channel.id}).get()
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if (!row) continue // Only care about already bridged channels
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if (row.last_bridged_pin_timestamp == null || lastPin > row.last_bridged_pin_timestamp) {
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checkMissedPinsSema.request(() => updatePins.updatePins(channel.id, row.room_id, lastPin))
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}
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}
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},
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/**
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* When logging back in, check if we missed any changes to emojis or stickers. Apply the changes if so.
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* @param {DiscordTypes.GatewayGuildCreateDispatchData} guild
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*/
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async checkMissedExpressions(guild) {
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const data = {guild_id: guild.id, ...guild}
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createSpace.syncSpaceExpressions(data, true)
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},
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/**
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* Announces to the parent room that the thread room has been created.
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* See notes.md, "Ignore MESSAGE_UPDATE and bridge THREAD_CREATE as the announcement"
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.APIThreadChannel} thread
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*/
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async onThreadCreate(client, thread) {
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const channelID = thread.parent_id || undefined
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const parentRoomID = select("channel_room", "room_id", {channel_id: channelID}).pluck().get()
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if (!parentRoomID) return // Not interested in a thread if we aren't interested in its wider channel
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const threadRoomID = await createRoom.syncRoom(thread.id) // Create room (will share the same inflight as the initial message to the thread)
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await announceThread.announceThread(parentRoomID, threadRoomID, thread)
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},
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/**
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayGuildUpdateDispatchData} guild
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*/
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async onGuildUpdate(client, guild) {
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const spaceID = select("guild_space", "space_id", {guild_id: guild.id}).pluck().get()
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if (!spaceID) return
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await createSpace.syncSpace(guild)
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},
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/**
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayChannelUpdateDispatchData} channelOrThread
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* @param {boolean} isThread
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*/
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async onChannelOrThreadUpdate(client, channelOrThread, isThread) {
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const roomID = select("channel_room", "room_id", {channel_id: channelOrThread.id}).pluck().get()
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if (!roomID) return // No target room to update the data on
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await createRoom.syncRoom(channelOrThread.id)
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},
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/**
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayChannelPinsUpdateDispatchData} data
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*/
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async onChannelPinsUpdate(client, data) {
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const roomID = select("channel_room", "room_id", {channel_id: data.channel_id}).pluck().get()
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if (!roomID) return // No target room to update pins in
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const convertedTimestamp = updatePins.convertTimestamp(data.last_pin_timestamp)
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await updatePins.updatePins(data.channel_id, roomID, convertedTimestamp)
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},
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/**
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayMessageCreateDispatchData} message
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*/
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async onMessageCreate(client, message) {
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if (message.author.username === "Deleted User") return // Nothing we can do for deleted users.
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const channel = client.channels.get(message.channel_id)
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if (!channel || !("guild_id" in channel) || !channel.guild_id) return // Nothing we can do in direct messages.
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const guild = client.guilds.get(channel.guild_id)
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assert(guild)
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if (message.webhook_id) {
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const row = select("webhook", "webhook_id", {webhook_id: message.webhook_id}).pluck().get()
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if (row) return // The message was sent by the bridge's own webhook on discord. We don't want to reflect this back, so just drop it.
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}
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const {affected, row} = await speedbump.maybeDoSpeedbump(message.channel_id, message.id)
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if (affected) return
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// @ts-ignore
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await sendMessage.sendMessage(message, guild, row),
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await discordCommandHandler.execute(message, channel, guild)
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},
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/**
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayMessageUpdateDispatchData} data
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*/
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async onMessageUpdate(client, data) {
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if (data.webhook_id) {
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const row = select("webhook", "webhook_id", {webhook_id: data.webhook_id}).pluck().get()
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if (row) return // The message was sent by the bridge's own webhook on discord. We don't want to reflect this back, so just drop it.
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}
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const {affected, row} = await speedbump.maybeDoSpeedbump(data.channel_id, data.id)
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if (affected) return
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// Based on looking at data they've sent me over the gateway, this is the best way to check for meaningful changes.
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// If the message content is a string then it includes all interesting fields and is meaningful.
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if (typeof data.content === "string") {
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/** @type {DiscordTypes.GatewayMessageCreateDispatchData} */
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// @ts-ignore
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const message = data
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const channel = client.channels.get(message.channel_id)
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if (!channel || !("guild_id" in channel) || !channel.guild_id) return // Nothing we can do in direct messages.
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const guild = client.guilds.get(channel.guild_id)
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assert(guild)
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// @ts-ignore
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await editMessage.editMessage(message, guild, row)
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}
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},
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/**
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayMessageReactionAddDispatchData} data
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*/
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async onReactionAdd(client, data) {
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if (data.user_id === client.user.id) return // m2d reactions are added by the discord bot user - do not reflect them back to matrix.
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discordCommandHandler.onReactionAdd(data)
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await addReaction.addReaction(data)
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},
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/**
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayMessageReactionRemoveDispatchData | DiscordTypes.GatewayMessageReactionRemoveEmojiDispatchData | DiscordTypes.GatewayMessageReactionRemoveAllDispatchData} data
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*/
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async onSomeReactionsRemoved(client, data) {
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await removeReaction.removeSomeReactions(data)
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},
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/**
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayMessageDeleteDispatchData} data
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*/
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async onMessageDelete(client, data) {
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speedbump.onMessageDelete(data.id)
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await deleteMessage.deleteMessage(data)
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},
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/**
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayMessageDeleteBulkDispatchData} data
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*/
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async onMessageDeleteBulk(client, data) {
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await deleteMessage.deleteMessageBulk(data)
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},
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/**
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayTypingStartDispatchData} data
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*/
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async onTypingStart(client, data) {
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const roomID = select("channel_room", "room_id", {channel_id: data.channel_id}).pluck().get()
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if (!roomID) return
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const mxid = from("sim").join("sim_member", "mxid").where({user_id: data.user_id, room_id: roomID}).pluck("mxid").get()
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if (!mxid) return
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// Each Discord user triggers the notification every 8 seconds as long as they remain typing.
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// Discord does not send typing stopped events, so typing only stops if the timeout is reached or if the user sends their message.
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// (We have to manually stop typing on Matrix-side when the message is sent. This is part of the send action.)
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await api.sendTyping(roomID, true, mxid, 10000)
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},
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/**
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* @param {import("./discord-client")} client
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* @param {DiscordTypes.GatewayGuildEmojisUpdateDispatchData | DiscordTypes.GatewayGuildStickersUpdateDispatchData} data
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*/
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async onExpressionsUpdate(client, data) {
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await createSpace.syncSpaceExpressions(data, false)
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}
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}
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