# DBManager Implementation Summary

## Overview
Complete database management CLI tool for SCAR Chat user administration.

## Files Created (5 files, ~580 LOC)

1. **dbmanager/CMakeLists.txt** - Build configuration
2. **dbmanager/db_manager.h** - DBManager class interface
3. **dbmanager/db_manager.cpp** - DBManager implementation (~350 LOC)
4. **dbmanager/main.cpp** - Command-line interface (~180 LOC)
5. **dbmanager/README.md** - Complete documentation

## Files Modified

1. **server/database/database.h** - Added 6 new methods
2. **server/database/database.cpp** - Implemented 6 new methods (~200 LOC)
3. **CMakeLists.txt** - Added dbmanager subdirectory
4. **build_and_test.sh** - Integrated dbmanager into setup
5. **QUICKSTART.md** - Replaced manual SQL with dbmanager
6. **README.md** - Added Database Management section
7. **PROGRESS.md** - Added dbmanager feature tracking
8. **PROGRESS-DBMANAGER.md** - Created separate progress tracker

## New Database Methods

Added to `server/database/database.{h,cpp}`:

1. `deleteUser(username)` - Delete user from database
2. `updateUserPassword(username, hash, salt)` - Change password with new salt
3. `updateUserAvatar(username, avatar_data)` - Update avatar blob
4. `updateUserEmail(username, email)` - Update email field
5. `updateUserRole(username, role)` - Update role field
6. `searchUsers(field, value)` - Search with LIKE pattern
7. `getAllUsers()` - Retrieve all users ordered by username

## Commands Implemented

All 9 commands from specification:

1. ✅ `adduser <username> <password> [avatar]`
2. ✅ `deleteuser <username>`
3. ✅ `modifypass <username> <newpass>`
4. ✅ `modifyavatar <username> <file>`
5. ✅ `modifyemail <username> <email>`
6. ✅ `modifyrole <username> <role>`
7. ✅ `fetch <username>`
8. ✅ `search <field> <value>`
9. ✅ `list`

## Features

- **Password Security**: Automatic Argon2 hashing with random salt generation
- **Database Location**: Auto-detection (local → install → home) with `--db` override
- **Avatar Support**: Binary blob storage from image files
- **Formatted Output**: Table layout for list, detailed display for fetch
- **Error Handling**: Comprehensive validation and error messages
- **Help System**: `--help` flag and usage documentation

## Database Location Priority

1. `--db <path>` command-line option
2. Current working directory (`./scarchat.db`)
3. Install path (`/usr/local/share/scarchat/scarchat.db`)
4. User home (`~/.local/share/scarchat/scarchat.db`)
5. Fallback to `./scarchat.db` (creates if missing)

## Example Usage

```bash
# Create admin
./dbmanager adduser admin secure123
./dbmanager modifyrole admin admin
./dbmanager modifyemail admin admin@localhost

# Create users with avatars
./dbmanager adduser alice pass123 /home/alice/avatar.jpg
./dbmanager adduser bob pass456 /home/bob/avatar.png

# Query operations
./dbmanager list
./dbmanager search role admin
./dbmanager fetch alice

# Modify users
./dbmanager modifypass alice newpassword
./dbmanager modifyemail bob bob@example.com

# Custom database location
./dbmanager --db /custom/path/db.db list
```

## Integration with Build System

- Added to root `CMakeLists.txt` as subdirectory
- Links against `scarchat_shared` library (Database, Argon2, JWT)
- Builds with server/client: `cmake --build build`
- Binary output: `build/dbmanager/dbmanager`
- Integrated into `build_and_test.sh` for automated setup

## Testing Strategy

The build script now:
1. Builds dbmanager with rest of project
2. Uses dbmanager to create test user `testuser:testpass`
3. Eliminates manual SQL requirement
4. Verifies database creation and Argon2 hashing

## Documentation

Complete documentation in `dbmanager/README.md`:
- Usage examples for all commands
- Security details (Argon2 parameters)
- Database schema reference
- Troubleshooting guide
- Batch operation examples
- Integration script templates

## Status

🟢 **COMPLETE** - All requirements from dbmanager.md specification implemented

Ready to use for:
- User administration
- Testing setup
- Production user management
- Batch operations
- Integration with external tools

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**Total Project Files**: 58 files  
**DBManager Files**: 5 files  
**DBManager LOC**: ~580 lines  
**Database Methods Added**: 7 methods, ~200 LOC
