out-of-your-element/m2d/actions/add-reaction.js

54 lines
2.1 KiB
JavaScript

// @ts-check
const assert = require("assert").strict
const Ty = require("../../types")
const passthrough = require("../../passthrough")
const {discord, sync, db, select} = passthrough
/**
* @param {Ty.Event.Outer<Ty.Event.M_Reaction>} event
*/
async function addReaction(event) {
const channelID = select("channel_room", "channel_id", "WHERE room_id = ?").pluck().get(event.room_id)
if (!channelID) return // We just assume the bridge has already been created
const messageID = select("event_message", "message_id", "WHERE event_id = ? AND part = 0").pluck().get(event.content["m.relates_to"].event_id) // 0 = primary
if (!messageID) return // Nothing can be done if the parent message was never bridged.
const emoji = event.content["m.relates_to"].key // TODO: handle custom text or emoji reactions
let discordPreferredEncoding
if (emoji.startsWith("mxc://")) {
// Custom emoji
const row = select("emoji", ["id", "name"], "WHERE mxc_url = ?").get(emoji)
if (row) {
// Great, we know exactly what this emoji is!
discordPreferredEncoding = encodeURIComponent(`${row.name}:${row.id}`)
} else {
// We don't have this emoji and there's no realistic way to just-in-time upload a new emoji somewhere.
// We can't try using a known emoji with the same name because we don't even know what the name is. We only have the mxc url.
// Sucks!
return
}
} else {
// Default emoji
// https://github.com/discord/discord-api-docs/issues/2723#issuecomment-807022205 ????????????
const encoded = encodeURIComponent(emoji)
const encodedTrimmed = encoded.replace(/%EF%B8%8F/g, "")
const forceTrimmedList = [
"%F0%9F%91%8D", // 👍
"%E2%AD%90" // ⭐
]
discordPreferredEncoding =
( forceTrimmedList.includes(encodedTrimmed) ? encodedTrimmed
: encodedTrimmed !== encoded && [...emoji].length === 2 ? encoded
: encodedTrimmed)
console.log("add reaction from matrix:", emoji, encoded, encodedTrimmed, "chosen:", discordPreferredEncoding)
}
return discord.snow.channel.createReaction(channelID, messageID, discordPreferredEncoding) // acting as the discord bot itself
}
module.exports.addReaction = addReaction