✨ Add support for Discord OAuth token exchange alongside existing Challonge integration

code/websites/pokedex.online/server/oauth-proxy.js

@@ -40,18 +40,10 @@ app.use('/gamemaster', gamemasterRouter);
 /**
  * Exchange authorization code for access token
  * POST /oauth/token
+ * Supports multiple providers: Challonge, Discord
  */
 app.post('/oauth/token', async (req, res) => {
-  if (!config.challonge.configured) {
+  const { code, provider = 'challonge' } = req.body;
-    logger.warn('OAuth token request received but Challonge not configured');
-    return res.status(503).json({
-      error: 'Challonge OAuth not configured',
-      message:
-        'Set CHALLONGE_CLIENT_ID and CHALLONGE_CLIENT_SECRET environment variables'
-    });
-  }
-
-  const { code } = req.body;
 
   if (!code) {
     logger.warn('OAuth token request missing authorization code');
@@ -59,7 +51,60 @@ app.post('/oauth/token', async (req, res) => {
   }
 
   try {
-    logger.debug('Exchanging authorization code for access token');
+    // Handle Discord OAuth
+    if (provider === 'discord') {
+      const clientId = process.env.VITE_DISCORD_CLIENT_ID;
+      const clientSecret = process.env.DISCORD_CLIENT_SECRET;
+      const redirectUri = process.env.VITE_DISCORD_REDIRECT_URI;
+
+      if (!clientId || !clientSecret) {
+        logger.warn('Discord OAuth not configured', {
+          hasClientId: !!clientId,
+          hasClientSecret: !!clientSecret
+        });
+        return res.status(503).json({
+          error: 'Discord OAuth not configured',
+          message: 'Set VITE_DISCORD_CLIENT_ID and DISCORD_CLIENT_SECRET environment variables'
+        });
+      }
+
+      logger.debug('Exchanging Discord authorization code for access token');
+      const response = await fetch('https://discord.com/api/oauth2/token', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/x-www-form-urlencoded'
+        },
+        body: new URLSearchParams({
+          client_id: clientId,
+          client_secret: clientSecret,
+          grant_type: 'authorization_code',
+          code: code,
+          redirect_uri: redirectUri
+        })
+      });
+
+      const data = await response.json();
+
+      if (!response.ok) {
+        logger.error('Discord token exchange failed', { status: response.status, data });
+        return res.status(response.status).json(data);
+      }
+
+      logger.info('Discord token exchange successful');
+      return res.json(data);
+    }
+
+    // Handle Challonge OAuth (default)
+    if (!config.challonge.configured) {
+      logger.warn('OAuth token request received but Challonge not configured');
+      return res.status(503).json({
+        error: 'Challonge OAuth not configured',
+        message:
+          'Set CHALLONGE_CLIENT_ID and CHALLONGE_CLIENT_SECRET environment variables'
+      });
+    }
+
+    logger.debug('Exchanging Challonge authorization code for access token');
     const response = await fetch('https://api.challonge.com/oauth/token', {
       method: 'POST',
       headers: {
@@ -77,14 +122,14 @@ app.post('/oauth/token', async (req, res) => {
     const data = await response.json();
 
     if (!response.ok) {
-      logger.error('Token exchange failed', { status: response.status, data });
+      logger.error('Challonge token exchange failed', { status: response.status, data });
       return res.status(response.status).json(data);
     }
 
-    logger.info('Token exchange successful');
+    logger.info('Challonge token exchange successful');
     res.json(data);
   } catch (error) {
-    logger.error('Token exchange error', { error: error.message });
+    logger.error('Token exchange error', { provider, error: error.message });
     res.status(500).json({
       error: 'Token exchange failed',
       message: error.message