Implement unban functionality

src/components/moderation/ProfileManager.tsx

@@ -107,7 +107,12 @@ export function ProfileManager() {
 
       if (logError) logger.error('Failed to log admin action', { error: getErrorMessage(logError) });
 
-      handleSuccess('Success', `User ${ban ? 'banned' : 'unbanned'} successfully.`);
+      handleSuccess(
+        'Success', 
+        ban 
+          ? 'User banned successfully. They have been signed out and cannot access the application.' 
+          : 'User unbanned successfully. They can now access the application normally.'
+      );
 
       // Refresh profiles
       fetchProfiles();

src/hooks/useBanCheck.ts

@@ -46,7 +46,7 @@ export function useBanCheck() {
 
     checkBan();
 
-    // Subscribe to profile changes (real-time ban detection)
+    // Subscribe to profile changes (real-time ban/unban detection)
     const channel = supabase
       .channel('ban-check')
       .on(
@@ -58,7 +58,10 @@ export function useBanCheck() {
           filter: `user_id=eq.${user.id}`
         },
         (payload) => {
-          if (payload.new && (payload.new as { banned: boolean }).banned) {
+          const newProfile = payload.new as { banned: boolean };
+          
+          // Handle BAN event
+          if (newProfile.banned && !isBanned) {
             setIsBanned(true);
             toast({
               title: 'Account Suspended',
@@ -69,6 +72,17 @@ export function useBanCheck() {
             supabase.auth.signOut();
             navigate('/');
           }
+          
+          // Handle UNBAN event
+          if (!newProfile.banned && isBanned) {
+            setIsBanned(false);
+            toast({
+              title: 'Account Restored',
+              description: 'Your account has been unbanned. You can now use the application normally.',
+              variant: 'default',
+              duration: 8000
+            });
+          }
         }
       )
       .subscribe();

supabase/functions/_shared/banCheck.ts

@@ -45,3 +45,21 @@ export function createBannedResponse(requestId: string, corsHeaders: Record<stri
     }
   );
 }
+
+export function createUnbannedResponse(requestId: string, corsHeaders: Record<string, string>) {
+  return new Response(
+    JSON.stringify({ 
+      success: true,
+      message: 'Account restored. You can now access the application.',
+      requestId
+    }),
+    { 
+      status: 200, 
+      headers: { 
+        ...corsHeaders, 
+        'Content-Type': 'application/json',
+        'X-Request-ID': requestId 
+      } 
+    }
+  );
+}

supabase/migrations/20251030015243_5e033e34-37ab-41cd-8f41-8a405c34552a.sql

@@ -0,0 +1,37 @@
+-- Enhance invalidate_banned_user_sessions trigger to handle both ban and unban events
+CREATE OR REPLACE FUNCTION public.invalidate_banned_user_sessions()
+RETURNS TRIGGER
+LANGUAGE plpgsql
+SECURITY DEFINER
+SET search_path = public
+AS $$
+BEGIN
+  -- If user was just banned (banned changed from false to true)
+  IF NEW.banned = true AND OLD.banned = false THEN
+    PERFORM pg_notify(
+      'user_banned',
+      json_build_object(
+        'user_id', NEW.user_id,
+        'username', NEW.username,
+        'banned_at', NOW(),
+        'action', 'banned'
+      )::text
+    );
+  END IF;
+  
+  -- If user was just unbanned (banned changed from true to false)
+  IF NEW.banned = false AND OLD.banned = true THEN
+    PERFORM pg_notify(
+      'user_unbanned',
+      json_build_object(
+        'user_id', NEW.user_id,
+        'username', NEW.username,
+        'unbanned_at', NOW(),
+        'action', 'unbanned'
+      )::text
+    );
+  END IF;
+  
+  RETURN NEW;
+END;
+$$;