feat: redirect to same url on login/logout

routes/api/auth/login.ts

@@ -1,18 +1,25 @@
 import { Handlers } from "$fresh/server.ts";
 import { oauth2Client } from "@lib/auth.ts";
-import { sha256 } from "@lib/string.ts";
-import { setCookie } from "https://deno.land/std@0.197.0/http/cookie.ts";
+import { setCookie } from "$std/http/cookie.ts";
 
-export const codeChallengeMap = new Map();
+export const codeChallengeMap = new Map<
+  string,
+  { codeVerifier: string; redirect?: string }
+>();
 
 export const handler: Handlers = {
-  async GET() {
+  async GET(req) {
+    const url = new URL(req.url);
+
     const { codeVerifier, uri } = await oauth2Client.code.getAuthorizationUri();
 
     const codeChallenge = uri.searchParams.get("code_challenge");
     if (!codeChallenge) return new Response();
 
-    codeChallengeMap.set(codeChallenge, codeVerifier);
+    codeChallengeMap.set(codeChallenge, {
+      codeVerifier,
+      redirect: decodeURIComponent(url.searchParams.get("redirect") || ""),
+    });
 
     const headers = new Headers();
     setCookie(headers, {