# 🎯 Discord-Style RBAC Implementation

## Overview
We've successfully implemented a Discord-style Role-Based Access Control (RBAC) system with hierarchical permissions, replacing the simple role system with a sophisticated many-to-many relationship structure.

## 🗄️ Database Schema

### Core Tables

1. **`admin_permissions`** - Individual permissions
   - `id` (UUID) - Primary key
   - `name` (String) - Permission name (e.g., 'manage_users')
   - `description` (Text) - Human-readable description

2. **`admins_roles`** - Admin roles with hierarchy
   - `id` (UUID) - Primary key
   - `name` (String) - Role name (e.g., 'Master', 'Admin', 'Moderator')
   - `description` (String) - Role description
   - `position` (Integer) - Hierarchy value (higher = more powerful)
   - `color` (String) - Hex color for UI display
   - `icon` (String) - FontAwesome icon class

3. **`users_roles`** - Visual user roles (labels)
   - `id` (UUID) - Primary key
   - `name` (String) - Role name (e.g., 'Friend', 'Family', 'VIP')
   - `description` (Text) - Role description
   - `color` (String) - Hex color for UI display
   - `icon` (String) - FontAwesome icon class

### Junction Tables

4. **`admin_role_permissions`** - Links roles to permissions
   - `role_id` (UUID) → `admins_roles.id`
   - `permission_id` (UUID) → `admin_permissions.id`

5. **`admin_user_roles_assignments`** - Links users to admin roles
   - `user_id` (UUID) → `users.uuid`
   - `role_id` (UUID) → `admins_roles.id`

6. **`users_roles_assignments`** - Links users to visual roles
   - `user_id` (UUID) → `users.uuid`
   - `visual_role_id` (UUID) → `users_roles.id`

## 🔑 Key Features

### Discord-Style Hierarchy
- **Position-based hierarchy**: Higher `position` values = more powerful roles
- **Role management restrictions**: Users can only manage roles with lower positions
- **Owner supremacy**: Owners bypass all hierarchy restrictions

### Many-to-Many Relationships
- **Multiple admin roles per user**: Users can have several admin roles simultaneously
- **Multiple visual roles per user**: Users can have multiple cosmetic labels
- **Permission union**: User's effective permissions = union of all their roles' permissions

### Permission System
- **Granular permissions**: Individual permissions like 'manage_users', 'manage_roles'
- **Role-based assignment**: Permissions are assigned to roles, not directly to users
- **Hierarchical management**: Users can only manage roles below their highest position

## 🏗️ Model Classes

### `AdminPermission`
```python
- Individual permissions that can be assigned to roles
- Methods: Standard CRUD operations
```

### `AdminRole`
```python
- Admin roles with hierarchy and permissions
- Methods:
  - has_permission(permission_name) - Check if role has specific permission
  - can_manage_role(other_role) - Check hierarchy permissions
  - get_users_with_role(role_id) - Get all users with this role
```

### `UserRole`
```python
- Visual roles for user organization/labeling
- Methods:
  - get_users_with_role(role_id) - Get all users with this visual role
```

### `User` (Enhanced)
```python
- Enhanced with RBAC methods
- Admin Role Methods:
  - get_admin_roles() - Get all admin roles
  - has_admin_role(role_id) - Check specific admin role
  - add_admin_role(role) - Add admin role
  - remove_admin_role(role) - Remove admin role
  - set_admin_roles(roles) - Replace all admin roles
  - clear_admin_roles() - Remove all admin roles

- Visual Role Methods:
  - get_visual_roles() - Get all visual roles
  - has_visual_role(role_id) - Check specific visual role
  - add_visual_role(role) - Add visual role
  - remove_visual_role(role) - Remove visual role

- Permission Methods:
  - has_permission(permission_name) - Check permission across all roles
  - get_all_permissions() - Get unique permissions from all roles
  - get_highest_role_position() - Get highest hierarchy position
  - can_manage_role(target_role) - Check if can manage specific role
```

## 📋 Default Permissions

The system includes these default admin permissions:
- `manage_users` - Create, edit, and delete users
- `manage_roles` - Create, edit, and delete admin roles
- `manage_permissions` - Assign permissions to roles
- `manage_settings` - Access and modify application settings
- `view_logs` - View application logs and audit trails
- `manage_invites` - Create and manage user invitations
- `manage_servers` - Configure media servers
- `manage_plugins` - Install and configure plugins

## 🔄 Migration Status

✅ **Migration created**: `implement_discord_style_rbac.py`
✅ **Models updated**: All RBAC models implemented
✅ **Relationships established**: Many-to-many tables created
✅ **Legacy compatibility**: Old methods maintained for backward compatibility
✅ **Default data**: Default permissions will be inserted on migration

## 🚀 Next Steps

1. **Run the migration**: `flask db upgrade`
2. **Create default roles**: Set up Master, Admin, Moderator roles with appropriate positions
3. **Update templates**: Modify admin interface to use new role system
4. **Update routes**: Ensure all permission checks use new RBAC methods
5. **Test hierarchy**: Verify role management restrictions work correctly

## 💡 Usage Examples

```python
# Check permission
if current_user.has_permission('manage_users'):
    # User can manage users

# Add admin role
master_role = AdminRole.query.filter_by(name='Master').first()
user.add_admin_role(master_role)

# Check role hierarchy
if current_user.can_manage_role(target_role):
    # User can manage this role

# Add visual role
friend_role = UserRole.query.filter_by(name='Friend').first()
user.add_visual_role(friend_role)
```

This implementation provides a robust, Discord-style RBAC system that's both powerful and flexible for managing complex permission scenarios.