Implement planned features

supabase/functions/notify-user-submission-status/index.ts

@@ -151,11 +151,64 @@ serve(async (req) => {
       };
     }
 
+    // Generate idempotency key for duplicate prevention
+    const { data: keyData, error: keyError } = await supabase
+      .rpc('generate_notification_idempotency_key', {
+        p_notification_type: `submission_${status}`,
+        p_entity_id: submission_id,
+        p_recipient_id: user_id,
+      });
+
+    const idempotencyKey = keyData || `user_sub_${submission_id}_${user_id}_${status}_${Date.now()}`;
+
+    // Check for duplicate within 24h window
+    const { data: existingLog, error: logCheckError } = await supabase
+      .from('notification_logs')
+      .select('id')
+      .eq('user_id', user_id)
+      .eq('idempotency_key', idempotencyKey)
+      .gte('created_at', new Date(Date.now() - 24 * 60 * 60 * 1000).toISOString())
+      .maybeSingle();
+
+    if (existingLog) {
+      // Duplicate detected - log and skip
+      await supabase.from('notification_logs').update({
+        is_duplicate: true
+      }).eq('id', existingLog.id);
+
+      console.log('Duplicate notification prevented:', { 
+        userId: user_id,
+        idempotencyKey,
+        submissionId: submission_id,
+        requestId: tracking.requestId 
+      });
+
+      endRequest(tracking, 200);
+
+      return new Response(
+        JSON.stringify({
+          success: true,
+          message: 'Duplicate notification prevented',
+          idempotencyKey,
+          requestId: tracking.requestId
+        }),
+        {
+          headers: { 
+            ...corsHeaders, 
+            'Content-Type': 'application/json',
+            'X-Request-ID': tracking.requestId
+          },
+          status: 200,
+        }
+      );
+    }
+
     console.log('Sending notification to user:', { 
       userId: user_id, 
       workflowId, 
       entityName,
       status,
+      idempotencyKey,
       requestId: tracking.requestId 
     });
 
@@ -175,6 +228,19 @@ serve(async (req) => {
       throw new Error(`Failed to trigger notification: ${notificationError.message}`);
     }
 
+    // Log notification in notification_logs with idempotency key
+    await supabase.from('notification_logs').insert({
+      user_id,
+      notification_type: `submission_${status}`,
+      idempotency_key: idempotencyKey,
+      is_duplicate: false,
+      metadata: {
+        submission_id,
+        submission_type,
+        transaction_id: notificationResult?.transactionId
+      }
+    });
+
     console.log('User notification sent successfully:', notificationResult);
 
     endRequest(tracking, 200);