Initial, working login and logout with spotify

src/lib/assets/favicon.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="107" height="128" viewBox="0 0 107 128"><title>svelte-logo</title><path d="M94.157 22.819c-10.4-14.885-30.94-19.297-45.792-9.835L22.282 29.608A29.92 29.92 0 0 0 8.764 49.65a31.5 31.5 0 0 0 3.108 20.231 30 30 0 0 0-4.477 11.183 31.9 31.9 0 0 0 5.448 24.116c10.402 14.887 30.942 19.297 45.791 9.835l26.083-16.624A29.92 29.92 0 0 0 98.235 78.35a31.53 31.53 0 0 0-3.105-20.232 30 30 0 0 0 4.474-11.182 31.88 31.88 0 0 0-5.447-24.116" style="fill:#ff3e00"/><path d="M45.817 106.582a20.72 20.72 0 0 1-22.237-8.243 19.17 19.17 0 0 1-3.277-14.503 18 18 0 0 1 .624-2.435l.49-1.498 1.337.981a33.6 33.6 0 0 0 10.203 5.098l.97.294-.09.968a5.85 5.85 0 0 0 1.052 3.878 6.24 6.24 0 0 0 6.695 2.485 5.8 5.8 0 0 0 1.603-.704L69.27 76.28a5.43 5.43 0 0 0 2.45-3.631 5.8 5.8 0 0 0-.987-4.371 6.24 6.24 0 0 0-6.698-2.487 5.7 5.7 0 0 0-1.6.704l-9.953 6.345a19 19 0 0 1-5.296 2.326 20.72 20.72 0 0 1-22.237-8.243 19.17 19.17 0 0 1-3.277-14.502 17.99 17.99 0 0 1 8.13-12.052l26.081-16.623a19 19 0 0 1 5.3-2.329 20.72 20.72 0 0 1 22.237 8.243 19.17 19.17 0 0 1 3.277 14.503 18 18 0 0 1-.624 2.435l-.49 1.498-1.337-.98a33.6 33.6 0 0 0-10.203-5.1l-.97-.294.09-.968a5.86 5.86 0 0 0-1.052-3.878 6.24 6.24 0 0 0-6.696-2.485 5.8 5.8 0 0 0-1.602.704L37.73 51.72a5.42 5.42 0 0 0-2.449 3.63 5.79 5.79 0 0 0 .986 4.372 6.24 6.24 0 0 0 6.698 2.486 5.8 5.8 0 0 0 1.602-.704l9.952-6.342a19 19 0 0 1 5.295-2.328 20.72 20.72 0 0 1 22.237 8.242 19.17 19.17 0 0 1 3.277 14.503 18 18 0 0 1-8.13 12.053l-26.081 16.622a19 19 0 0 1-5.3 2.328" style="fill:#fff"/></svg>

src/lib/index.ts

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+// place files you want to import through the `$lib` alias in this folder.

src/lib/server/auth/spotify.ts

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+import { PUBLIC_CLIENT_ID, PUBLIC_REDIRECT_URI } from "$env/static/public";
+
+export const generateRandomString = (length: number) => {
+  const possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+  const values = crypto.getRandomValues(new Uint8Array(length));
+  return values.reduce((acc, x) => acc + possible[x % possible.length], "");
+}
+
+export const sha256 = async (plain: string) => {
+  const encoder = new TextEncoder()
+  const data = encoder.encode(plain)
+  return crypto.subtle.digest('SHA-256', data)
+}
+
+export const base64encode = (input: ArrayBuffer) => {
+  return btoa(String.fromCharCode(...new Uint8Array(input)))
+    .replace(/=/g, '')
+    .replace(/\+/g, '-')
+    .replace(/\//g, '_');
+}
+
+export const getToken = async (code: string, codeVerifier: string) => {
+  const url = "https://accounts.spotify.com/api/token";
+  const payload = {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/x-www-form-urlencoded'
+    },
+    body: new URLSearchParams({
+      client_id: PUBLIC_CLIENT_ID,
+      grant_type: 'authorization_code',
+      code,
+      redirect_uri: PUBLIC_REDIRECT_URI,
+      code_verifier: codeVerifier
+    })
+  };
+
+  const body = await fetch(url, payload);
+  const response = await body.json();
+
+  return response;
+}
+

src/lib/server/db/index.ts

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+import { drizzle } from 'drizzle-orm/better-sqlite3';
+import Database from 'better-sqlite3';
+import * as schema from './schema';
+import { env } from '$env/dynamic/private';
+
+if (!env.DATABASE_URL) throw new Error('DATABASE_URL is not set');
+
+const client = new Database(env.DATABASE_URL);
+
+export const db = drizzle(client, { schema });

src/lib/server/db/schema.ts

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+import { relations } from 'drizzle-orm';
+import { sqliteTable, integer, text, type AnySQLiteColumn, primaryKey } from 'drizzle-orm/sqlite-core';
+
+export const usersTable = sqliteTable('users', {
+	email: text('email').primaryKey(),
+	username: text('username'),
+});
+
+export const sessionsTable = sqliteTable('sessions', {
+	id: text('id').primaryKey(),
+	accessToken: text('access_token'),
+	refreshToken: text('refresh_token'),
+	userEmail: text('user_email').references((): AnySQLiteColumn => usersTable.email)
+});
+
+export const sessionsRelations = relations(sessionsTable, ({ one }) => ({
+	user: one(usersTable, { fields: [sessionsTable.userEmail], references: [usersTable.email] })
+}))
+
+export const userRelations = relations(usersTable, ({ one, many }) => ({
+	session: one(sessionsTable),
+	usersInLobby: many(usersInLobby)
+}));
+
+export const lobbysTable = sqliteTable('lobbys', {
+	id: integer('id').primaryKey({ autoIncrement: true }),
+	hostEmail: text('host_email').references((): AnySQLiteColumn => usersTable.email),
+});
+
+export const lobbysRelations = relations(lobbysTable, ({ many }) => ({
+	usersInLobby: many(usersInLobby)
+}));
+
+export const usersInLobby = sqliteTable('user_in_lobby', {
+	userEmail: text('user_email').notNull().references((): AnySQLiteColumn => usersTable.email),
+	lobbyId: integer('lobby_id').notNull().references((): AnySQLiteColumn => lobbysTable.id)
+}, (t) => [
+	primaryKey({ columns: [t.userEmail, t.lobbyId] })
+])
+
+export const usersToLobbysRelations = relations(usersInLobby, ({ one }) => ({
+	lobby: one(lobbysTable, {
+		fields: [usersInLobby.lobbyId],
+		references: [lobbysTable.id]
+	}),
+	user: one(usersTable, {
+		fields: [usersInLobby.userEmail],
+		references: [usersTable.email]
+	})
+}));
+
+export const states = sqliteTable('auth_states', {
+	id: text('id').primaryKey(),
+	codeVerifier: text('code_verifier').notNull()
+})

src/lib/server/spotify/base.ts

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+export const getJson = async (accessToken: string, subUri: string) => {
+    const baseUrl = new URL("https://api.spotify.com/");
+    const requestUrl = new URL(subUri, baseUrl);
+
+    return await fetch(requestUrl, {
+        method: 'GET',
+        headers: {
+            "Authorization": `Bearer ${accessToken}`
+        }
+    })
+}

src/lib/server/spotify/users.ts

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+import { getJson } from "./base"
+
+export const getCurrentUserProfile = async (accessToken: string) => {
+    return await (await getJson(accessToken, "/v1/me")).json()
+}