sojorn/sojorn_docs/legacy/CHAT_DELETE_DEPLOYMENT.md

Chat Deletion Feature - Deployment Guide

Summary

Fixed the chat deletion functionality to make it permanent with proper warnings. Users now get a clear warning dialog before deletion, and the system removes data from both the server database and local IndexedDB storage.

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Changes Made

1. Backend (Go) - DELETE Endpoints Added

Files Modified:

• go-backend/internal/repository/chat_repository.go - Added DeleteConversation() and DeleteMessage() methods
• go-backend/internal/handlers/chat_handler.go - Added DELETE handler endpoints
• go-backend/cmd/api/main.go - Registered DELETE routes

New API Endpoints:

• DELETE /api/v1/conversations/:id - Permanently deletes conversation and all messages
• DELETE /api/v1/messages/:id - Permanently deletes a single message

Security:

• Verifies user is a participant before allowing deletion
• Returns 401 Unauthorized if user doesn't have permission

2. Flutter App - Permanent Deletion

Files Modified:

• sojorn_app/lib/services/api_service.dart - Added deleteConversation() and deleteMessage() API methods
• sojorn_app/lib/services/secure_chat_service.dart - Updated to call backend DELETE API
• sojorn_app/lib/screens/secure_chat/secure_chat_screen.dart - Enhanced warning dialog

Key Changes:

• Delete now removes data from both server database and local IndexedDB
• New warning dialog with:
  • ⚠️ Red warning icon and "PERMANENT DELETION" title
  • Bullet points showing what will be deleted
  • Red warning box stating "THIS ACTION CANNOT BE UNDONE"
  • Red "DELETE PERMANENTLY" button
  • Cannot be dismissed by tapping outside
• Loading indicator during deletion
• Success/error feedback

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Deployment Steps

Step 1: Delete All Existing Chats from Database

SSH into your server:

ssh -i "C:\Users\Patrick\.ssh\mpls.pem" patrick@194.238.28.122

Password: P22k154ever!

Run the SQL script:

sudo -u postgres psql sojorn

Then paste this SQL:

BEGIN;

-- Delete all messages first (foreign key dependency)
DELETE FROM public.secure_messages;

-- Delete all conversations
DELETE FROM public.encrypted_conversations;

COMMIT;

-- Verify deletion
SELECT COUNT(*) as message_count FROM public.secure_messages;
SELECT COUNT(*) as conversation_count FROM public.encrypted_conversations;

Expected output:

message_count: 0
conversation_count: 0

Type \q to exit psql.

Step 2: Deploy Go Backend

From your local machine, deploy the updated backend:

cd c:\Webs\Sojorn\go-backend
.\scripts\deploy.sh

Or manually:

# On server
cd /home/patrick/sojorn-backend
git pull
go build -o sojorn-api ./cmd/api
sudo systemctl restart sojorn-api
sudo systemctl status sojorn-api

Step 3: Hot Restart Flutter App

No deployment needed - just hot restart the Flutter web app:

1. In your browser, press R or refresh the page
2. Or run: flutter run -d chrome --web-port 8080

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Testing the Fix

1. Start a new conversation with another user
2. Send a few test messages
3. Click the 3-dot menu in the chat screen
4. Select "Delete Chat"
5. Verify the warning dialog shows:
   • Red warning icon
   • "PERMANENT DELETION" title
   • List of what will be deleted
   • Red warning box
   • "DELETE PERMANENTLY" button
6. Click "DELETE PERMANENTLY"
7. Verify:
   • Loading indicator appears
   • Success message shows
   • Chat screen closes
   • Conversation is removed from list
   • Messages are gone from database (check with SQL)
   • Messages are gone from IndexedDB (check browser DevTools > Application > IndexedDB)

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What's Fixed

Before:

• ❌ Delete only removed local IndexedDB data
• ❌ Server data remained (encrypted messages still in DB)
• ❌ Weak warning dialog
• ❌ Deletion wasn't permanent
• ❌ Other user could still see messages

After:

• ✅ Deletes from both server database and local storage
• ✅ Strong warning dialog with multiple warnings
• ✅ PERMANENT deletion - cannot be undone
• ✅ Both users lose all messages
• ✅ Proper loading and error handling
• ✅ Authorization checks (only participants can delete)

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SQL Script Location

The SQL script to delete all chats is saved at: c:\Webs\Sojorn\migrations_archive\delete_all_chats.sql

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Notes

• The E2EE key fixes from earlier are still in place
• Users will need to hot restart to get the new OTK fixes
• After deleting all chats, users can start fresh with properly working E2EE
• The delete function now works correctly for future conversations