64 lines
1.7 KiB
JavaScript
64 lines
1.7 KiB
JavaScript
// @ts-check
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const fetch = require("node-fetch")
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const passthrough = require("../passthrough")
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const { sync, db } = passthrough
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/** @type {import("./mreq")} */
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const mreq = sync.require("./mreq")
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const DISCORD_IMAGES_BASE = "https://cdn.discordapp.com"
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const IMAGE_SIZE = 1024
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/** @type {Map<string, Promise<string>>} */
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const inflight = new Map()
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/**
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* @param {string} path
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*/
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async function uploadDiscordFileToMxc(path) {
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const url = DISCORD_IMAGES_BASE + path
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// Are we uploading this file RIGHT NOW? Return the same inflight promise with the same resolution
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let existing = inflight.get(url)
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if (typeof existing === "string") {
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return existing
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}
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// Has this file already been uploaded in the past? Grab the existing copy from the database.
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existing = db.prepare("SELECT mxc_url FROM file WHERE discord_url = ?").pluck().get(url)
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if (typeof existing === "string") {
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return existing
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}
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// Download from Discord
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const promise = fetch(url, {}).then(/** @param {import("node-fetch").Response} res */ async res => {
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/** @ts-ignore @type {import("stream").Readable} body */
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const body = res.body
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// Upload to Matrix
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/** @type {import("../types").R_FileUploaded} */
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const root = await mreq.mreq("POST", "/media/v3/upload", body, {
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headers: {
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"Content-Type": res.headers.get("content-type")
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}
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})
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// Store relationship in database
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db.prepare("INSERT INTO file (discord_url, mxc_url) VALUES (?, ?)").run(url, root.content_uri)
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inflight.delete(url)
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return root.content_uri
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})
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inflight.set(url, promise)
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return promise
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}
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function guildIcon(guild) {
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return `/icons/${guild.id}/${guild.icon}?size=${IMAGE_SIZE}`
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}
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module.exports.guildIcon = guildIcon
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module.exports.uploadDiscordFileToMxc = uploadDiscordFileToMxc
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