# RBAC Module Setup - Task 1 Complete

## Summary

Task 1 of the RBAC authentication module has been successfully completed. The foundational structure and database schema for the Role-Based Access Control system are now in place.

## What Was Created

### 1. Directory Structure

Created the complete RBAC module directory structure under `src/RBAC/`:

- ✓ `Bootstrap/` - For RBAC system initialization classes
- ✓ `Entities/` - For domain entity models (Role, Permission, User, AuditLog)
- ✓ `Exceptions/` - For custom exception classes
- ✓ `Helpers/` - For authorization helper functions
- ✓ `Middleware/` - For authentication and authorization middleware
- ✓ `Repositories/` - For data access layer classes
- ✓ `Services/` - For business logic services (RoleManager, AccessControl, AuditLogger)
- ✓ `ValueObjects/` - For immutable value objects (AuthContext, AccessCheckResult)

### 2. Database Migrations

Created 4 SQL migration files in `database/migrations/`:

#### 001_create_roles_table.sql
- Stores role definitions with id, name, and description
- Unique constraint on name
- Indexed for efficient queries
- **Validates Requirements**: 1.1, 6.5, 11.1

#### 002_create_permissions_table.sql
- Stores permissions with resource and action for each role
- Foreign key to roles table with CASCADE delete
- Unique constraint on (role_id, resource, action) to prevent duplicates
- Indexed on role_id and (resource, action)
- **Validates Requirements**: 2.1, 11.1

#### 003_create_users_table.sql
- Stores user accounts with role assignments
- Foreign key to roles table
- Unique constraints on username and email
- is_active flag for activation/deactivation
- Indexed on username, email, role_id, and is_active
- **Validates Requirements**: 3.1, 11.1

#### 004_create_audit_logs_table.sql
- Stores audit trail for all RBAC operations
- Foreign key to users table with SET NULL on delete
- JSON column for storing change details
- Indexed on entity, user, timestamp, action, and result
- **Validates Requirements**: 12.1, 12.6, 11.1

### 3. Configuration Files

#### .env.example
Comprehensive environment configuration including:
- Database connection settings
- RBAC feature flags
- Default role configurations (Superadmin, Admin, Desk Officer)
- Application settings
- Logging configuration

### 4. Migration Tools

#### database/migrate.php
- Automated migration runner script
- Creates database if it doesn't exist
- Executes all migrations in order
- Handles multiple SQL statements per file
- Provides clear success/error feedback

#### database/rollback.php
- Automated rollback script
- Drops all RBAC tables in reverse order
- Handles foreign key constraints
- Includes safety confirmation prompt

### 5. Documentation

#### src/RBAC/README.md
Comprehensive module documentation including:
- Feature overview
- Directory structure explanation
- Quick start guide
- Usage examples for all major features
- API endpoint documentation
- Error handling guide
- Testing information
- Requirements validation checklist

#### database/migrations/README.md
Migration-specific documentation including:
- Migration execution order
- Manual and automated execution instructions
- Schema overview
- Requirements validation

## Database Schema Overview

The schema implements a complete RBAC system with:

1. **Roles** - Dynamic role definitions
2. **Permissions** - Resource-action combinations per role
3. **Users** - User accounts with role assignments
4. **Audit Logs** - Complete audit trail

All tables use:
- InnoDB engine for transaction support
- utf8mb4 character set for full Unicode support
- Automatic timestamp management
- Foreign keys for referential integrity
- Strategic indexes for query performance

## Requirements Validated

This task validates the following requirements:

- ✓ **Requirement 1.1**: Role creation and persistent storage
- ✓ **Requirement 6.5**: RBAC system initialization and bootstrap
- ✓ **Requirement 11.1**: Persistent storage for roles, permissions, users, and audit logs

## Next Steps

The foundation is now in place. The next tasks will build upon this structure:

- **Task 2**: Create RBAC Entity Models (Role, Permission, User, AuditLog, AuthContext, AccessCheckResult)
- **Task 3**: Create RBAC Exception Classes
- **Task 4**: Implement RBAC Repository Layer
- **Task 5**: Implement RoleManager Service
- **Task 6**: Implement AccessControl Service
- **Task 7**: Implement AuditLogger Service
- **Task 8**: Integrate with DI Container and Bootstrap
- **Task 9**: Create Authentication Middleware
- **Task 10**: Create Authorization Helper Functions

## How to Use

### Run Migrations

```bash
# Copy environment configuration
cp .env.example .env

# Edit .env with your database credentials
nano .env

# Run migrations
php database/migrate.php
```

### Verify Setup

```bash
# Check that all tables were created
mysql -u root -p -e "USE rbac_system; SHOW TABLES;"

# Expected output:
# +------------------------+
# | Tables_in_rbac_system  |
# +------------------------+
# | audit_logs             |
# | permissions            |
# | roles                  |
# | users                  |
# +------------------------+
```

### Rollback (if needed)

```bash
# Drop all RBAC tables
php database/rollback.php
```

## Files Created

```
.env.example
database/
├── migrate.php
├── rollback.php
└── migrations/
    ├── 001_create_roles_table.sql
    ├── 002_create_permissions_table.sql
    ├── 003_create_users_table.sql
    ├── 004_create_audit_logs_table.sql
    └── README.md
src/
└── RBAC/
    ├── Bootstrap/.gitkeep
    ├── Entities/.gitkeep
    ├── Exceptions/.gitkeep
    ├── Helpers/.gitkeep
    ├── Middleware/.gitkeep
    ├── Repositories/.gitkeep
    ├── Services/.gitkeep
    ├── ValueObjects/.gitkeep
    └── README.md
```

## Status

✅ **Task 1 Complete** - RBAC module structure and database schema are ready for implementation.