Create Roblox OAuth callback handler

cgen-69b8987cff38461d9c00d268861cf6bb

api/roblox/oauth-callback.ts

@@ -0,0 +1,88 @@
+import type { VercelRequest, VercelResponse } from "@vercel/node";
+
+interface RobloxTokenResponse {
+  access_token: string;
+  token_type: string;
+  expires_in: number;
+  refresh_token?: string;
+}
+
+interface RobloxUserInfo {
+  sub: string;
+  preferred_username: string;
+  name: string;
+  email?: string;
+  picture?: string;
+}
+
+export default async function handler(req: VercelRequest, res: VercelResponse) {
+  if (req.method !== "POST") {
+    res.setHeader("Allow", "POST");
+    return res.status(405).json({ error: "Method not allowed" });
+  }
+
+  try {
+    const { code, state } = req.body;
+
+    if (!code) {
+      return res.status(400).json({ error: "Authorization code is required" });
+    }
+
+    const clientId = process.env.ROBLOX_OAUTH_CLIENT_ID;
+    const clientSecret = process.env.ROBLOX_OAUTH_CLIENT_SECRET;
+    const redirectUri =
+      process.env.ROBLOX_OAUTH_REDIRECT_URI || "https://aethex.dev/roblox-callback";
+
+    if (!clientId || !clientSecret) {
+      return res.status(500).json({ error: "Roblox OAuth not configured" });
+    }
+
+    // Exchange code for token
+    const tokenResponse = await fetch("https://apis.roblox.com/oauth/token", {
+      method: "POST",
+      headers: { "Content-Type": "application/x-www-form-urlencoded" },
+      body: new URLSearchParams({
+        grant_type: "authorization_code",
+        code,
+        client_id: clientId,
+        client_secret: clientSecret,
+        redirect_uri: redirectUri,
+      }).toString(),
+    });
+
+    if (!tokenResponse.ok) {
+      const errorData = await tokenResponse.text();
+      console.error("Roblox token exchange failed:", errorData);
+      return res.status(401).json({ error: "Token exchange failed" });
+    }
+
+    const tokenData: RobloxTokenResponse = await tokenResponse.json();
+
+    // Get user info with access token
+    const userResponse = await fetch("https://apis.roblox.com/oauth/v1/userinfo", {
+      headers: { Authorization: `Bearer ${tokenData.access_token}` },
+    });
+
+    if (!userResponse.ok) {
+      console.error("Failed to fetch Roblox user info");
+      return res.status(401).json({ error: "Failed to fetch user info" });
+    }
+
+    const userInfo: RobloxUserInfo = await userResponse.json();
+
+    // Return user info to frontend
+    return res.status(200).json({
+      roblox_user_id: userInfo.sub,
+      roblox_username: userInfo.preferred_username,
+      roblox_name: userInfo.name,
+      roblox_email: userInfo.email || null,
+      roblox_avatar: userInfo.picture || null,
+      state,
+    });
+  } catch (error: any) {
+    console.error("Roblox OAuth callback error:", error);
+    return res.status(500).json({
+      error: error?.message || "Authentication failed",
+    });
+  }
+}