From 2034d96c9ed6aa7b963332e1e5226a132349918b Mon Sep 17 00:00:00 2001
From: Dongho Kim <dongho@ekstrah.com>
Date: Thu, 20 Nov 2025 10:27:30 +0100
Subject: [PATCH] migration

---
 backend/migrate_subscriber_categories.py | 79 ++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 backend/migrate_subscriber_categories.py

diff --git a/backend/migrate_subscriber_categories.py b/backend/migrate_subscriber_categories.py
new file mode 100644
index 0000000..d35b45a
--- /dev/null
+++ b/backend/migrate_subscriber_categories.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+"""
+Migration script to update subscriber categories
+Ensures all subscribers have all available categories if they're missing some
+"""
+from pymongo import MongoClient
+from config import Config
+from database import subscribers_collection, rss_feeds_collection
+
+def migrate_subscriber_categories():
+    """Update all subscribers to have all available categories"""
+    
+    print("\n" + "="*70)
+    print("📧 Subscriber Categories Migration")
+    print("="*70)
+    
+    # Get all available categories from RSS feeds
+    available_categories = list(rss_feeds_collection.distinct('category'))
+    available_categories.sort()
+    
+    print(f"\n✓ Available categories: {available_categories}")
+    
+    # Get all subscribers
+    all_subscribers = list(subscribers_collection.find({}))
+    print(f"✓ Found {len(all_subscribers)} total subscribers")
+    
+    updated_count = 0
+    no_change_count = 0
+    
+    for subscriber in all_subscribers:
+        email = subscriber['email']
+        current_categories = subscriber.get('categories', [])
+        
+        # Check if subscriber is missing any categories
+        if not current_categories:
+            # No categories set - give them all
+            print(f"\n  {email}: No categories → Adding all {available_categories}")
+            subscribers_collection.update_one(
+                {'email': email},
+                {'$set': {'categories': available_categories}}
+            )
+            updated_count += 1
+        elif set(current_categories) != set(available_categories):
+            # Has some categories but not all
+            missing = set(available_categories) - set(current_categories)
+            print(f"\n  {email}: {current_categories} → Adding all {available_categories}")
+            print(f"    Missing: {list(missing)}")
+            subscribers_collection.update_one(
+                {'email': email},
+                {'$set': {'categories': available_categories}}
+            )
+            updated_count += 1
+        else:
+            # Already has all categories
+            no_change_count += 1
+    
+    print("\n" + "="*70)
+    print("📊 Migration Complete")
+    print("="*70)
+    print(f"✓ Updated: {updated_count} subscribers")
+    print(f"✓ No change needed: {no_change_count} subscribers")
+    print(f"✓ Total: {len(all_subscribers)} subscribers")
+    print("="*70 + "\n")
+    
+    return {
+        'total': len(all_subscribers),
+        'updated': updated_count,
+        'no_change': no_change_count
+    }
+
+
+if __name__ == '__main__':
+    try:
+        result = migrate_subscriber_categories()
+        print(f"✅ Migration successful!")
+    except Exception as e:
+        print(f"\n❌ Migration failed: {e}")
+        import traceback
+        traceback.print_exc()