74 lines
2.3 KiB
JavaScript
74 lines
2.3 KiB
JavaScript
// @ts-check
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const DiscordTypes = require("discord-api-types/v10")
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const Ty = require("../../types")
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const assert = require("assert").strict
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const {PNG} = require("pngjs")
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const passthrough = require("../../passthrough")
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const { sync, db, discord } = passthrough
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/** @type {import("../../matrix/file")} */
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const file = sync.require("../../matrix/file")
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//** @type {import("../../matrix/mreq")} */
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const mreq = sync.require("../../matrix/mreq")
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const SIZE = 160 // Discord's display size on 1x displays is 160
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const INFO = {
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mimetype: "image/png",
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w: SIZE,
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h: SIZE
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}
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/**
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* @typedef RlottieWasm
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* @prop {(string) => boolean} load load lottie data from string of json
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* @prop {() => number} frames get number of frames
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* @prop {(frameCount: number, width: number, height: number) => Uint8Array} render render lottie data to bitmap
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*/
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const Rlottie = (async () => {
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const Rlottie = require("./rlottie-wasm.js")
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await new Promise(resolve => Rlottie.onRuntimeInitialized = resolve)
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return Rlottie
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})()
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/**
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* @param {DiscordTypes.APIStickerItem} stickerItem
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* @returns {Promise<{mxc: string, info: typeof INFO}>}
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*/
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async function convert(stickerItem) {
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const existingMxc = db.prepare("SELECT mxc FROM lottie WHERE id = ?").pluck().get(stickerItem.id)
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if (existingMxc) return {mxc: existingMxc, info: INFO}
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const r = await Rlottie
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const res = await fetch(file.DISCORD_IMAGES_BASE + file.sticker(stickerItem))
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if (res.status !== 200) throw new Error("Sticker data file not found.")
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const text = await res.text()
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/** @type RlottieWasm */
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const rh = new r.RlottieWasm()
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const status = rh.load(text)
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if (!status) throw new Error(`Rlottie unable to load ${text.length} byte data file.`)
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const rendered = rh.render(0, SIZE, SIZE)
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let png = new PNG({
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width: SIZE,
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height: SIZE,
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bitDepth: 8, // 8 red + 8 green + 8 blue + 8 alpha
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colorType: 6, // RGBA
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inputColorType: 6, // RGBA
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inputHasAlpha: true,
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})
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png.data = Buffer.from(rendered)
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// @ts-ignore wrong type from pngjs
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const readablePng = png.pack()
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/** @type {Ty.R.FileUploaded} */
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const root = await mreq.mreq("POST", "/media/v3/upload", readablePng, {
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headers: {
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"Content-Type": INFO.mimetype
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}
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})
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assert(root.content_uri)
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db.prepare("INSERT INTO lottie (id, mxc) VALUES (?, ?)").run(stickerItem.id, root.content_uri)
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return {mxc: root.content_uri, info: INFO}
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}
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module.exports.convert = convert
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