# Username Login Migration Package

## What This Package Does

Converts your banking system from account number-based login to username-based login while preserving all existing functionality.

## Package Contents

### Documentation Files
- **README_USERNAME_MIGRATION.md** (this file) - Package overview
- **QUICK_START_GUIDE.md** - Fast implementation guide (start here!)
- **MIGRATION_INSTRUCTIONS.md** - Detailed step-by-step instructions
- **USERNAME_LOGIN_CHANGES_SUMMARY.md** - Complete technical documentation

### Database Files
- **database_migration_add_username.sql** - SQL script to add username field

### Utility Scripts
- **populate_usernames.php** - Automatically assigns usernames to existing accounts
- **test_username_login.php** - Verifies migration was successful

### Modified Code Files
- **user_access.php** - Updated login page
- **include/class.user.php** - Updated user authentication class

## Quick Overview

### What Changes
- Login form now asks for "Username" instead of "Account Number"
- New `username` field added to database for authentication
- Login logic updated to authenticate using username

### What Stays the Same
- Account numbers (`uname`) preserved for all other purposes
- All dashboard pages work without modification
- Session management unchanged
- Admin login unchanged (uses email)
- OTP and PIN authentication unchanged

## Getting Started

**Choose your path:**

### Fast Track (30 minutes)
1. Read `QUICK_START_GUIDE.md`
2. Follow the 7 steps
3. Done!

### Detailed Path (1 hour)
1. Read `MIGRATION_INSTRUCTIONS.md`
2. Review `USERNAME_LOGIN_CHANGES_SUMMARY.md`
3. Follow migration steps
4. Done!

## Before You Start

### Prerequisites
- Database backup (CRITICAL!)
- Access to database (MySQL/phpMyAdmin)
- Access to upload PHP files
- Basic understanding of SQL

### Recommended Environment
- Test on staging/development server first
- Have database backup ready
- Schedule during low-traffic period

## Implementation Steps (Summary)

1. **Backup database** ← Don't skip this!
2. **Run SQL migration** - Adds username column
3. **Populate usernames** - Assigns usernames to accounts
4. **Test changes** - Verify everything works
5. **Go live** - Users can now login with usernames
6. **Clean up** - Remove temporary files

## Key Features

✓ **Non-destructive** - Account numbers preserved
✓ **Backward compatible** - All existing code works
✓ **Automated** - Scripts handle most of the work
✓ **Tested** - Includes verification script
✓ **Documented** - Comprehensive guides included
✓ **Reversible** - Rollback procedure included

## File Usage Guide

| File | When to Use | Delete After? |
|------|-------------|---------------|
| QUICK_START_GUIDE.md | First - for quick implementation | Yes |
| MIGRATION_INSTRUCTIONS.md | For detailed guidance | Yes |
| USERNAME_LOGIN_CHANGES_SUMMARY.md | For technical reference | Yes |
| database_migration_add_username.sql | Once - to update database | Yes |
| populate_usernames.php | Once - to assign usernames | Yes (IMPORTANT!) |
| test_username_login.php | Once - to verify migration | Yes (IMPORTANT!) |
| user_access.php | Keep - this is your updated login page | No |
| include/class.user.php | Keep - this is your updated user class | No |

## Security Notes

⚠️ **IMPORTANT:** Delete these files after migration:
- `populate_usernames.php` - Contains database access
- `test_username_login.php` - Exposes system information
- All documentation files - Reveal system structure

## Support & Troubleshooting

### Common Issues

**"Username column doesn't exist"**
→ Run database migration script

**"Login not working"**
→ Run test script to diagnose
→ Check if files uploaded correctly

**"Some accounts missing usernames"**
→ Run populate_usernames.php

**"Duplicate username error"**
→ Fix duplicates manually in database

### Getting Help

1. Check `MIGRATION_INSTRUCTIONS.md` troubleshooting section
2. Run `test_username_login.php` for diagnostics
3. Review error logs (PHP and database)
4. Verify all steps completed

## Technical Details

### Database Changes
- Adds `username` VARCHAR(100) column
- Creates unique index on username
- Preserves all existing data

### Code Changes
- Login form: `uname` → `username`
- Authentication: Uses username field
- Session: Still stores account number

### Compatibility
- PHP 5.6+ (tested)
- MySQL 5.5+ (tested)
- Works with existing codebase

## Testing Checklist

Before going live, verify:

- [ ] Database backup created
- [ ] Username column exists
- [ ] All accounts have usernames
- [ ] No duplicate usernames
- [ ] Login works with username
- [ ] Wrong credentials show error
- [ ] OTP email sent correctly
- [ ] PIN authentication works
- [ ] Dashboard loads normally
- [ ] Account number displays correctly
- [ ] Logout works
- [ ] Session timeout works

## Rollback Plan

If issues occur:

1. Restore database backup
2. Restore original code files
3. System returns to account number login

## Timeline

- **Preparation:** 10 minutes (backup, review docs)
- **Database migration:** 5 minutes
- **Username population:** 5 minutes
- **Testing:** 15 minutes
- **Cleanup:** 5 minutes
- **Total:** ~40 minutes

## Success Metrics

After migration:
- Users login with usernames ✓
- All existing features work ✓
- No data loss ✓
- Account numbers still visible ✓
- Admin panel works ✓

## Next Steps

1. **Read** `QUICK_START_GUIDE.md`
2. **Backup** your database
3. **Follow** the implementation steps
4. **Test** thoroughly
5. **Deploy** to production
6. **Clean up** temporary files

## Additional Recommendations

Consider implementing after migration:
- Password hashing (currently plain text)
- Login attempt limiting
- Username format validation
- "Forgot username" feature
- Session security improvements

## Version Information

- **Migration Version:** 1.0
- **Compatible with:** PHP 5.6+, MySQL 5.5+
- **Last Updated:** 2024
- **Status:** Production Ready

## License & Credits

This migration package was created to help transition from account number to username-based authentication while maintaining system stability and data integrity.

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## Ready to Start?

👉 **Open `QUICK_START_GUIDE.md` and begin!**

Remember: Always test on a development environment first!
