out-of-your-element/d2m/actions/send-message.js

87 lines
4 KiB
JavaScript

// @ts-check
const assert = require("assert").strict
const DiscordTypes = require("discord-api-types/v10")
const passthrough = require("../../passthrough")
const { discord, sync, db } = passthrough
/** @type {import("../converters/message-to-event")} */
const messageToEvent = sync.require("../converters/message-to-event")
/** @type {import("../../matrix/api")} */
const api = sync.require("../../matrix/api")
/** @type {import("./register-user")} */
const registerUser = sync.require("./register-user")
/** @type {import("./register-pk-user")} */
const registerPkUser = sync.require("./register-pk-user")
/** @type {import("../actions/create-room")} */
const createRoom = sync.require("../actions/create-room")
/** @type {import("../../discord/utils")} */
const dUtils = sync.require("../../discord/utils")
/**
* @param {DiscordTypes.GatewayMessageCreateDispatchData} message
* @param {DiscordTypes.APIGuildChannel} channel
* @param {DiscordTypes.APIGuild} guild
* @param {{speedbump_id: string, speedbump_webhook_id: string} | null} row data about the webhook which is proxying messages in this channel
*/
async function sendMessage(message, channel, guild, row) {
const roomID = await createRoom.ensureRoom(message.channel_id)
let senderMxid = null
if (!dUtils.isWebhookMessage(message)) {
if (message.author.id === discord.application.id) {
// no need to sync the bot's own user
} else if (message.member) { // available on a gateway message create event
senderMxid = await registerUser.syncUser(message.author, message.member, channel, guild, roomID)
} else { // well, good enough...
senderMxid = await registerUser.ensureSimJoined(message.author, roomID)
}
} else if (row && row.speedbump_webhook_id === message.webhook_id) {
// Handle the PluralKit public instance
if (row.speedbump_id === "466378653216014359") {
const root = await registerPkUser.fetchMessage(message.id)
// Member is null if member was deleted. We just got this message, so member surely exists.
if (!root.member) {
const e = new Error("PK API did not return a member")
message["__pk_response__"] = root
console.error(root)
throw e
}
senderMxid = await registerPkUser.syncUser(message.author, root, roomID)
}
}
const events = await messageToEvent.messageToEvent(message, guild, {}, {api})
const eventIDs = []
if (events.length) {
db.prepare("REPLACE INTO message_channel (message_id, channel_id) VALUES (?, ?)").run(message.id, message.channel_id)
if (senderMxid) api.sendTyping(roomID, false, senderMxid)
}
for (const event of events) {
const part = event === events[0] ? 0 : 1
const reactionPart = event === events[events.length - 1] ? 0 : 1
const eventType = event.$type
if ("$sender" in event) senderMxid = event.$sender
/** @type {Pick<typeof event, Exclude<keyof event, "$type" | "$sender">> & { $type?: string, $sender?: string }} */
const eventWithoutType = {...event}
delete eventWithoutType.$type
delete eventWithoutType.$sender
const useTimestamp = message["backfill"] ? new Date(message.timestamp).getTime() : undefined
const eventID = await api.sendEvent(roomID, eventType, eventWithoutType, senderMxid, useTimestamp)
db.prepare("INSERT INTO event_message (event_id, event_type, event_subtype, message_id, part, reaction_part, source) VALUES (?, ?, ?, ?, ?, ?, 1)").run(eventID, eventType, event.msgtype || null, message.id, part, reactionPart) // source 1 = discord
// The primary event is part = 0 and has the most important and distinct information. It is used to provide reply previews, be pinned, and possibly future uses.
// The first event is chosen to be the primary part because it is usually the message text content and is more likely to be distinct.
// For example, "Reply to 'this meme made me think of you'" is more useful than "Replied to image".
// The last event gets reaction_part = 0. Reactions are managed there because reactions are supposed to appear at the bottom.
eventIDs.push(eventID)
}
return eventIDs
}
module.exports.sendMessage = sendMessage