space and room creation

matrix/file.js

@@ -0,0 +1,63 @@
+// @ts-check
+
+const fetch = require("node-fetch")
+
+const passthrough = require("../passthrough")
+const { sync, db } = passthrough
+/** @type {import("./mreq")} */
+const mreq = sync.require("./mreq")
+
+const DISCORD_IMAGES_BASE = "https://cdn.discordapp.com"
+const IMAGE_SIZE = 1024
+
+/** @type {Map<string, Promise<string>>} */
+const inflight = new Map()
+
+/**
+ * @param {string} path
+ */
+async function uploadDiscordFileToMxc(path) {
+	const url = DISCORD_IMAGES_BASE + path
+
+	// Are we uploading this file RIGHT NOW? Return the same inflight promise with the same resolution
+	let existing = inflight.get(url)
+	if (typeof existing === "string") {
+		return existing
+	}
+
+	// Has this file already been uploaded in the past? Grab the existing copy from the database.
+	existing = db.prepare("SELECT mxc_url FROM file WHERE discord_url = ?").pluck().get(url)
+	if (typeof existing === "string") {
+		return existing
+	}
+
+	// Download from Discord
+	const promise = fetch(url, {}).then(/** @param {import("node-fetch").Response} res */ async res => {
+		/** @ts-ignore @type {import("stream").Readable} body */
+		const body = res.body
+
+		// Upload to Matrix
+		/** @type {import("../types").R_FileUploaded} */
+		const root = await mreq.mreq("POST", "/media/v3/upload", body, {
+			headers: {
+				"Content-Type": res.headers.get("content-type")
+			}
+		})
+
+		// Store relationship in database
+		db.prepare("INSERT INTO file (discord_url, mxc_url) VALUES (?, ?)").run(url, root.content_uri)
+		inflight.delete(url)
+
+		return root.content_uri
+	})
+	inflight.set(url, promise)
+
+	return promise
+}
+
+function guildIcon(guild) {
+	return `/icons/${guild.id}/${guild.icon}?size=${IMAGE_SIZE}`
+}
+
+module.exports.guildIcon = guildIcon
+module.exports.uploadDiscordFileToMxc = uploadDiscordFileToMxc