feat: join first favorite on login

src/server/routes/user.js

@@ -3,6 +3,8 @@ import {randomBytes} from 'crypto';
 
 import passport from 'passport';
 
+import {joinChannel} from '~/common/channel';
+
 export default function userRoutes(app) {
   app.get('/auth/reddit', (req, res, next) => {
     req.session.state = randomBytes(32).toString('hex');
@@ -16,9 +18,27 @@ export default function userRoutes(app) {
           next(error);
           return;
         }
-        passport.authenticate('reddit', {
-          successRedirect: '/chat',
-          failureRedirect: '/login',
+        passport.authenticate('reddit', (error, user) => {
+          if (error) {
+            next(error);
+            return;
+          }
+          if (!user) {
+            res.redirect('/');
+          }
+          req.login(user, async (error) => {
+            if (error) {
+              next(error);
+              return;
+            }
+            const favorites = await user.favorites();
+            const channels = favorites.filter(({type}) => 'r' === type).map(joinChannel);
+            if (channels.length > 0) {
+              res.redirect(`/chat${channels[0]}`);
+              return;
+            }
+            res.redirect('/chat');
+          });
         })(req, res, next);
       });
     }