193 lines
8.7 KiB
JavaScript
193 lines
8.7 KiB
JavaScript
const assert = require("assert").strict
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const util = require("util")
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const {sync, db} = 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/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("../matrix/api")}) */
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const api = sync.require("../matrix/api")
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let lastReportedEvent = 0
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function isGuildAllowed(guildID) {
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return ["112760669178241024", "497159726455455754", "1100319549670301727"].includes(guildID)
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}
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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 (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 = db.prepare("SELECT room_id FROM channel_room WHERE channel_id = ?").pluck().get(channelID)
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if (!roomID) return
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let 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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api.sendEvent(roomID, "m.room.message", {
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msgtype: "m.text",
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body: "\u26a0 Bridged event from Discord not delivered. See formatted content for full details.",
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format: "org.matrix.custom.html",
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formatted_body: "\u26a0 <strong>Bridged event from Discord not delivered</strong>"
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+ `<br>Gateway event: ${gatewayMessage.t}`
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+ `<br>${e.toString()}`
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+ `<details><summary>Error trace</summary>`
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+ `<pre>${stackLines.join("\n")}</pre></details>`
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+ `<details><summary>Original payload</summary>`
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+ `<pre>${util.inspect(gatewayMessage.d, false, 4, false)}</pre></details>`,
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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 {import("discord-api-types/v10").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 = db.prepare("SELECT channel_id FROM channel_room").pluck().all()
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const prepared = db.prepare("SELECT message_id FROM event_message WHERE channel_id = ? AND 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 (!channel.last_message_id) continue
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const latestWasBridged = prepared.get(channel.id, channel.last_message_id)
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if (latestWasBridged) continue
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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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const messages = await client.snow.channel.getChannelMessages(channel.id, {limit: 50})
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let latestBridgedMessageIndex = messages.findIndex(m => {
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return prepared.get(channel.id, 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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mentions: [],
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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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* 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 {import("discord-api-types/v10").APIThreadChannel} thread
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*/
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async onThreadCreate(client, thread) {
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const parentRoomID = db.prepare("SELECT room_id FROM channel_room WHERE channel_id = ?").pluck().get(thread.parent_id)
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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 {import("discord-api-types/v10").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 = db.prepare("SELECT room_id FROM channel_room WHERE channel_id = ?").get(channelOrThread.id)
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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 {import("discord-api-types/v10").GatewayMessageCreateDispatchData} message
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*/
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async onMessageCreate(client, message) {
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if (message.webhook_id) {
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const row = db.prepare("SELECT webhook_id FROM webhook WHERE webhook_id = ?").pluck().get(message.webhook_id)
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if (row) {
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// 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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return
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}
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}
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/** @type {import("discord-api-types/v10").APIGuildChannel} */
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const channel = client.channels.get(message.channel_id)
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if (!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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if (!isGuildAllowed(guild.id)) return
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await sendMessage.sendMessage(message, guild)
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},
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/**
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* @param {import("./discord-client")} client
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* @param {import("discord-api-types/v10").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 = db.prepare("SELECT webhook_id FROM webhook WHERE webhook_id = ?").pluck().get(data.webhook_id)
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if (row) {
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// The update 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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return
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}
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}
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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 {import("discord-api-types/v10").GatewayMessageCreateDispatchData} */
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const message = data
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/** @type {import("discord-api-types/v10").APIGuildChannel} */
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const channel = client.channels.get(message.channel_id)
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if (!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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if (!isGuildAllowed(guild.id)) return
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await editMessage.editMessage(message, guild)
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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 {import("discord-api-types/v10").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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if (data.emoji.id !== null) return // TODO: image emoji reactions
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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 {import("discord-api-types/v10").GatewayMessageDeleteDispatchData} data
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*/
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async onMessageDelete(client, data) {
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await deleteMessage.deleteMessage(data)
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}
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}
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