265 lines
8.6 KiB
JavaScript
265 lines
8.6 KiB
JavaScript
// @ts-check
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const assert = require("assert").strict
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const Ty = require("../types")
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const {pipeline} = require("stream").promises
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const sharp = require("sharp")
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const {discord, sync, db, select} = require("../passthrough")
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/** @type {import("./api")}) */
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const api = sync.require("./api")
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/** @type {import("../m2d/converters/utils")} */
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const mxUtils = sync.require("../m2d/converters/utils")
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/** @type {import("../discord/utils")} */
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const dUtils = sync.require("../discord/utils")
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const PREFIXES = ["//", "/"]
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const EMOJI_SIZE = 128
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/** This many normal emojis + this many animated emojis. The total number is doubled. */
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const TIER_EMOJI_SLOTS = new Map([
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[1, 100],
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[2, 150],
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[3, 250]
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])
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/** @param {number} tier */
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function getSlotCount(tier) {
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return TIER_EMOJI_SLOTS.get(tier) || 50
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}
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let buttons = []
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/**
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* @param {string} roomID where to add the button
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* @param {string} eventID where to add the button
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* @param {string} key emoji to add as a button
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* @param {string} mxid only listen for responses from this user
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* @returns {Promise<import("discord-api-types/v10").GatewayMessageReactionAddDispatchData>}
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*/
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async function addButton(roomID, eventID, key, mxid) {
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await api.sendEvent(roomID, "m.reaction", {
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"m.relates_to": {
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rel_type: "m.annotation",
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event_id: eventID,
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key
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}
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})
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return new Promise(resolve => {
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buttons.push({roomID, eventID, mxid, key, resolve, created: Date.now()})
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})
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}
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// Clear out old buttons every so often to free memory
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setInterval(() => {
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const now = Date.now()
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buttons = buttons.filter(b => now - b.created < 2*60*60*1000)
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}, 10*60*1000)
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/** @param {Ty.Event.Outer<Ty.Event.M_Reaction>} event */
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function onReactionAdd(event) {
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const button = buttons.find(b => b.roomID === event.room_id && b.mxid === event.sender && b.eventID === event.content["m.relates_to"]?.event_id && b.key === event.content["m.relates_to"]?.key)
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if (button) {
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buttons = buttons.filter(b => b !== button) // remove button data so it can't be clicked again
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button.resolve(event)
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}
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}
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/**
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* @callback CommandExecute
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* @param {Ty.Event.Outer_M_Room_Message} event
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* @param {any} [ctx]
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*/
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/**
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* @typedef Command
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* @property {string[]} aliases
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* @property {CommandExecute} execute
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*/
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/** @param {CommandExecute} execute */
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function replyctx(execute) {
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/** @type {CommandExecute} */
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return function(event, ctx = {}) {
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ctx["m.relates_to"] = {
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"m.in_reply_to": {
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event_id: event.event_id
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}
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}
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return execute(event, ctx)
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}
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}
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const NEWLINE_ELEMENTS = mxUtils.BLOCK_ELEMENTS.concat(["BR"])
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class MatrixStringBuilder {
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constructor() {
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this.body = ""
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this.formattedBody = ""
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}
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/**
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* @param {string} body
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* @param {string} formattedBody
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* @param {any} [condition]
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*/
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add(body, formattedBody, condition = true) {
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if (condition) {
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if (!formattedBody) formattedBody = body
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this.body += body
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this.formattedBody += formattedBody
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}
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return this
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}
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/**
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* @param {string} body
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* @param {string} [formattedBody]
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* @param {any} [condition]
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*/
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addLine(body, formattedBody, condition = true) {
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if (condition) {
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if (!formattedBody) formattedBody = body
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if (this.body.length && this.body.slice(-1) !== "\n") this.body += "\n"
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this.body += body
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const match = this.formattedBody.match(/<\/?([a-zA-Z]+[a-zA-Z0-9]*)[^>]*>\s*$/)
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if (this.formattedBody.length && (!match || !NEWLINE_ELEMENTS.includes(match[1].toUpperCase()))) this.formattedBody += "<br>"
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this.formattedBody += formattedBody
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}
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return this
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}
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get() {
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return {
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msgtype: "m.text",
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body: this.body,
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format: "org.matrix.custom.html",
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formatted_body: this.formattedBody
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}
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}
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}
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/** @type {Command[]} */
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const commands = [{
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aliases: ["emoji"],
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execute: replyctx(
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async (event, ctx) => {
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// Guard
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/** @type {string} */ // @ts-ignore
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const channelID = select("channel_room", "channel_id", "WHERE room_id = ?").pluck().get(event.room_id)
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const guildID = discord.channels.get(channelID)?.["guild_id"]
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let matrixOnlyReason = null
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const matrixOnlyConclusion = "So the emoji will be uploaded on Matrix-side only. It will still be usable over the bridge, but may have degraded functionality."
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if (!guildID) {
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matrixOnlyReason = "NOT_BRIDGED"
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} else {
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const guild = discord.guilds.get(guildID)
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assert(guild)
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const slots = getSlotCount(guild.premium_tier)
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const permissions = dUtils.getPermissions([], guild.roles)
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if (guild.emojis.length >= slots) {
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matrixOnlyReason = "CAPACITY"
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} else if (!(permissions | 0x40000000n)) { // MANAGE_GUILD_EXPRESSIONS (apparently CREATE_GUILD_EXPRESSIONS isn't good enough...)
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matrixOnlyReason = "USER_PERMISSIONS"
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}
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}
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const nameMatch = event.content.body.match(/:([a-zA-Z0-9_]{2,}):/)
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if (!nameMatch) {
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return api.sendEvent(event.room_id, "m.room.message", {
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...ctx,
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msgtype: "m.text",
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body: "Not sure what you want to call this emoji. Try writing a new :name: in colons. The name can have letters, numbers, and underscores."
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})
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}
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const name = nameMatch[1]
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let mxc
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const mxcMatch = event.content.body.match(/(mxc:\/\/.*?)\b/)
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if (mxcMatch) {
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mxc = mxcMatch[1]
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}
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if (!mxc && event.content["m.relates_to"]?.["m.in_reply_to"]?.event_id) {
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const repliedToEventID = event.content["m.relates_to"]["m.in_reply_to"].event_id
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const repliedToEvent = await api.getEvent(event.room_id, repliedToEventID)
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if (repliedToEvent.type === "m.room.message" && repliedToEvent.content.msgtype === "m.image" && repliedToEvent.content.url) {
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mxc = repliedToEvent.content.url
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}
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}
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if (!mxc) {
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return api.sendEvent(event.room_id, "m.room.message", {
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...ctx,
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msgtype: "m.text",
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body: "Not sure what image you wanted to add. Try replying to an uploaded image when you use the command, or write an mxc:// URL in your message."
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})
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}
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const sent = await api.sendEvent(event.room_id, "m.room.message", {
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...ctx,
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...new MatrixStringBuilder()
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.addLine("## Emoji preview", "<h2>Emoji preview</h2>")
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.addLine(`Ⓜ️ This room isn't bridged to Discord. ${matrixOnlyConclusion}`, `Ⓜ️ <em>This room isn't bridged to Discord. ${matrixOnlyConclusion}</em>`, matrixOnlyReason === "NOT_BRIDGED")
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.addLine(`Ⓜ️ *Discord ran out of space for emojis. ${matrixOnlyConclusion}`, `Ⓜ️ <em>Discord ran out of space for emojis. ${matrixOnlyConclusion}</em>`, matrixOnlyReason === "CAPACITY")
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.addLine(`Ⓜ️ *If you were a Discord user, you wouldn't have permission to create emojis. ${matrixOnlyConclusion}`, `Ⓜ️ <em>If you were a Discord user, you wouldn't have permission to create emojis. ${matrixOnlyConclusion}</em>`, matrixOnlyReason === "CAPACITY")
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.addLine("[Preview not available in plain text.]", `Preview: <img data-mx-emoticon height="48" src="${mxc}">`)
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.addLine("Hit ✅ to add it.")
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.get()
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})
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addButton(event.room_id, sent, "✅", event.sender).then(async () => {
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const publicUrl = mxUtils.getPublicUrlForMxc(mxc)
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// @ts-ignore
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const resizeInput = await fetch(publicUrl, {agent: false}).then(res => res.arrayBuffer())
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const resizeOutput = await sharp(resizeInput)
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.resize(EMOJI_SIZE, EMOJI_SIZE, {fit: "inside", withoutEnlargement: true, background: {r: 0, g: 0, b: 0, alpha: 0}})
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.png()
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.toBuffer({resolveWithObject: true})
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if (matrixOnlyReason) {
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// Edit some state keys
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api.sendEvent(event.room_id, "m.room.message", {
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...ctx,
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msgtype: "m.text",
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body: "Sorry, adding Matrix-only emojis not supported yet!!"
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})
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} else {
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// Upload it to Discord and have the bridge sync it back to Matrix again
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console.log(`uploading emoji ${resizeOutput.data.length} bytes to :${name}:`)
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const emoji = await discord.snow.guildAssets.createEmoji(guildID, {name, image: "data:image/png;base64," + resizeOutput.data.toString("base64")})
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api.sendEvent(event.room_id, "m.room.message", {
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...ctx,
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msgtype: "m.text",
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body: `Created :${name}:`
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})
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}
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})
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}
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)
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}]
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/** @type {CommandExecute} */
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async function execute(event) {
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let realBody = event.content.body
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while (realBody.startsWith("> ")) {
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const i = realBody.indexOf("\n")
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if (i === -1) return
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realBody = realBody.slice(i + 1)
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}
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realBody = realBody.replace(/^\s*/, "")
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let words
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for (const prefix of PREFIXES) {
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if (realBody.startsWith(prefix)) {
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words = realBody.slice(prefix.length).split(" ")
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break
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}
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}
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if (!words) return
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const commandName = words[0]
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const command = commands.find(c => c.aliases.includes(commandName))
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if (!command) return
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await command.execute(event)
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}
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module.exports.execute = execute
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module.exports.onReactionAdd = onReactionAdd
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