I AM MUSIC

src/index.ts

@@ -1,34 +1,11 @@
 import Fastify from "fastify";
 import { Yapper } from "./Yapper";
-import path from "path";
-import { readFileSync, stat, writeFileSync } from "fs";
-
-const state = new Proxy(
-	JSON.parse(readFileSync(path.join(__dirname, "state.json"), "utf-8")),
-	{
-		get(target, prop) {
-			const data = readFileSync(
-				path.join(__dirname, "state.json"),
-				"utf-8"
-			);
-			return JSON.parse(data);
-		},
-		set(target, prop, value) {
-			const data = JSON.parse(
-				readFileSync(path.join(__dirname, "state.json"), "utf-8")
-			);
-			data[prop] = value;
-			writeFileSync(
-				path.join(__dirname, "state.json"),
-				JSON.stringify(data)
-			);
-			return true;
-		}
-	}
-);
+import { state } from "./utils";
+import { reqSpotify, spotifyFilter } from "./spotify";
 
 const fastify = Fastify({
-	loggerInstance: new Yapper()
+	loggerInstance: new Yapper(),
+	disableRequestLogging: true
 });
 
 fastify.get("/", (request, reply) => {
@@ -72,12 +49,21 @@ fastify.get("/callback", async (request, reply) => {
 		})
 	).json();
 
+	if (tokenRes.error) return reply.code(400).send();
+
 	state.accessToken = tokenRes.access_token;
 	state.explodesAt = Date.now() + tokenRes.expires_in * 1000;
 	state.refreshToken = tokenRes.refresh_token;
+
+	return `Logged in as ${
+		(await reqSpotify("/me")).display_name
+	}. You're good to go!`;
 });
 
 try {
+	setInterval(spotifyFilter, 5000);
+	spotifyFilter();
+
 	fastify.listen({
 		port: 4929,
 		host: "0.0.0.0"

src/spotify.ts

@@ -0,0 +1,62 @@
+import { state } from "./utils";
+
+export async function reqSpotify(
+	endpoint: string,
+	method: string = "GET",
+	data?: object
+) {
+	if (state.explodesAt >= Date.now()) {
+		const tokenRes = await (
+			await fetch("https://accounts.spotify.com/api/token", {
+				method: "POST",
+				headers: {
+					"Content-Type": "application/x-www-form-urlencoded"
+				},
+				body: new URLSearchParams({
+					refresh_token: state.refreshToken,
+					client_id: process.env.CLIENT_ID!,
+					grant_type: "refresh_token"
+				})
+			})
+		).json();
+
+		if (!tokenRes.error) {
+			state.accessToken = tokenRes.access_token;
+			state.explodesAt = Date.now() + tokenRes.expires_in * 1000;
+			state.refreshToken = tokenRes.refresh_token;
+		}
+	}
+
+	try {
+		return await (
+			await fetch("https://api.spotify.com/v1" + endpoint, {
+				method,
+				headers: {
+					Authorization: `Bearer ${state.accessToken}`
+				},
+				body: JSON.stringify(data)
+			})
+		).json();
+	} catch {
+		return {};
+	}
+}
+
+export async function spotifyFilter() {
+	const likedSongs = (await reqSpotify("/me/tracks")).items.map((item) => {
+		return {
+			uri: item.track.uri
+		};
+	});
+
+	await reqSpotify("/playlists/0jWbMtGfptAzenepLTL4ED/tracks", "DELETE", {
+		tracks: likedSongs
+	});
+	await reqSpotify("/playlists/0jWbMtGfptAzenepLTL4ED/tracks", "POST", {
+		uris: likedSongs.map((lss) => lss.uri),
+		position: 0
+	});
+	await reqSpotify("/me/tracks", "DELETE", {
+		ids: likedSongs.map((lss) => lss.uri.replace("spotify:track:", ""))
+	});
+}

src/utils.ts

@@ -0,0 +1,27 @@
+import { readFileSync, writeFileSync } from "fs";
+import path from "path";
+
+export const state = new Proxy<{
+	explodesAt: number;
+	accessToken: string;
+	refreshToken: string;
+}>(JSON.parse(readFileSync(path.join(__dirname, "../state.json"), "utf-8")), {
+	get(target, prop) {
+		const data = readFileSync(
+			path.join(__dirname, "../state.json"),
+			"utf-8"
+		);
+		return JSON.parse(data)[prop];
+	},
+	set(target, prop, value) {
+		const data = JSON.parse(
+			readFileSync(path.join(__dirname, "../state.json"), "utf-8")
+		);
+		data[prop] = value;
+		writeFileSync(
+			path.join(__dirname, "../state.json"),
+			JSON.stringify(data)
+		);
+		return true;
+	}
+});