feat: Implement comprehensive ban enforcement

src/hooks/useBanCheck.ts

@@ -0,0 +1,82 @@
+import { useEffect, useState } from 'react';
+import { useAuth } from '@/hooks/useAuth';
+import { supabase } from '@/integrations/supabase/client';
+import { useNavigate } from 'react-router-dom';
+import { toast } from '@/hooks/use-toast';
+
+export function useBanCheck() {
+  const { user } = useAuth();
+  const navigate = useNavigate();
+  const [isBanned, setIsBanned] = useState(false);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    if (!user) {
+      setIsBanned(false);
+      setLoading(false);
+      return;
+    }
+
+    const checkBan = async () => {
+      try {
+        const { data: profile } = await supabase
+          .from('profiles')
+          .select('banned')
+          .eq('user_id', user.id)
+          .single();
+
+        if (profile?.banned) {
+          setIsBanned(true);
+          toast({
+            title: 'Account Suspended',
+            description: 'Your account has been suspended. Contact support for assistance.',
+            variant: 'destructive',
+            duration: Infinity // Don't auto-dismiss
+          });
+          // Sign out banned user
+          await supabase.auth.signOut();
+          navigate('/');
+        }
+      } catch (error) {
+        console.error('Ban check error:', error);
+      } finally {
+        setLoading(false);
+      }
+    };
+
+    checkBan();
+
+    // Subscribe to profile changes (real-time ban detection)
+    const channel = supabase
+      .channel('ban-check')
+      .on(
+        'postgres_changes',
+        {
+          event: 'UPDATE',
+          schema: 'public',
+          table: 'profiles',
+          filter: `user_id=eq.${user.id}`
+        },
+        (payload) => {
+          if (payload.new && (payload.new as { banned: boolean }).banned) {
+            setIsBanned(true);
+            toast({
+              title: 'Account Suspended',
+              description: 'Your account has been suspended. Contact support for assistance.',
+              variant: 'destructive',
+              duration: Infinity
+            });
+            supabase.auth.signOut();
+            navigate('/');
+          }
+        }
+      )
+      .subscribe();
+
+    return () => {
+      supabase.removeChannel(channel);
+    };
+  }, [user, navigate]);
+
+  return { isBanned, loading };
+}