Security

class SupersetSecurityManager:
    """
    Comprehensive security manager for Superset access control.
    Extends Flask-AppBuilder security with Superset-specific permissions
    and datasource-level access controls.
    """
    
    def can_access(self, permission_name, view_name, user=None):
        """
        Check if user has specific permission for a view.
        
        Parameters:
        - permission_name: str, permission identifier ('can_read', 'can_write', etc.)
        - view_name: str, view or resource name
        - user: User, optional user object (defaults to current user)
        
        Returns:
        bool, True if user has permission, False otherwise
        """
    
    def all_datasource_access(self, user=None):
        """
        Check if user has access to all datasources.
        Administrative permission bypassing individual datasource checks.
        
        Parameters:
        - user: User, optional user object (defaults to current user)
        
        Returns:
        bool, True if user has all-datasource access
        """
    
    def database_access(self, database, user=None):
        """
        Check database-level access permission.
        
        Parameters:
        - database: Database, database instance to check
        - user: User, optional user object (defaults to current user)
        
        Returns:
        bool, True if user can access the database
        """
    
    def schema_access(self, database, schema, user=None):
        """
        Check schema-level access permission.
        
        Parameters:
        - database: Database, database containing the schema
        - schema: str, schema name to check access for
        - user: User, optional user object (defaults to current user)
        
        Returns:
        bool, True if user can access the schema
        """
    
    def datasource_access(self, datasource, user=None):
        """
        Check datasource-level access permission.
        
        Parameters:
        - datasource: BaseDatasource, table or Druid datasource to check
        - user: User, optional user object (defaults to current user)
        
        Returns:
        bool, True if user can access the datasource
        """
    
    def get_schema_perm(self, database, schema):
        """
        Generate schema permission string for access control.
        
        Parameters:
        - database: Database, database instance
        - schema: str, schema name
        
        Returns:
        str, formatted permission string for schema access
        """
    
    def can_access_datasource(self, database, table, schema=None):
        """
        Check table access with optional schema context.
        
        Parameters:
        - database: Database, database containing the table
        - table: str, table name to check access for
        - schema: str, optional schema name for context
        
        Returns:
        bool, True if user can access the specified table
        """

# Admin Role
"""
Full system access and administrative privileges.

Permissions:
- All database and datasource access
- User and role management
- System configuration changes
- Import/export operations
- SQL Lab with DDL/DML capabilities
- Dashboard and chart creation/modification
- Access request approval
"""

# Alpha Role  
"""
Advanced user with broad access and content creation privileges.

Permissions:
- All datasource access (configurable)
- Dashboard and chart creation/modification
- SQL Lab with SELECT privileges
- Bulk delete operations
- Data exploration across all sources
- Limited administrative functions
"""

# Gamma Role
"""
Basic user with restricted access to assigned resources.

Permissions:
- Access to specifically granted datasources
- Dashboard and chart viewing
- Limited chart creation (on permitted data)
- SQL Lab on granted databases (if enabled)
- Personal workspace management
"""

# Public Role
"""
Anonymous access role (when enabled).

Permissions:
- Access to publicly shared dashboards
- View-only access to designated public data
- No authentication required
- Configurable through PUBLIC_ROLE_LIKE_GAMMA setting
"""

# SQL Lab Role
"""
Specialized role for SQL Lab access.

Permissions:
- SQL query execution
- Saved query management
- Result export capabilities
- Database metadata browsing
"""

# Read-Only Permissions
"""
View and list permissions for basic access.
"""
can_show = "can_show"
"""View object details and properties."""

can_list = "can_list"  
"""List objects in collections and indexes."""

# Administrative Permissions
"""
System-level permissions for administrative functions.
"""
all_database_access = "all_database_access"
"""Access to all database connections regardless of grants."""

can_sql_json = "can_sql_json"
"""Execute SQL queries through JSON API."""

can_override_role_permissions = "can_override_role_permissions"
"""Temporarily modify user permissions."""

can_sync_druid_source = "can_sync_druid_source"
"""Synchronize Druid metadata and datasources."""

can_approve = "can_approve"
"""Approve datasource access requests."""

can_update_role = "can_update_role"
"""Modify user roles and assignments."""

# Alpha-Level Permissions
"""
Advanced user permissions for content creation.
"""
muldelete = "muldelete"
"""Perform bulk delete operations."""

all_datasource_access = "all_datasource_access"
"""Access all datasources without individual grants."""

# Object-Specific Permissions
"""
Fine-grained permissions for individual resources.
"""
database_access = "database_access"
"""Access to specific database connections."""

schema_access = "schema_access"
"""Access to specific database schemas."""

datasource_access = "datasource_access"
"""Access to specific tables or Druid datasources."""

metric_access = "metric_access"
"""Access to specific calculated metrics."""

# Read-Only Model Views
"""
Views accessible to users with basic read permissions.
"""
READ_ONLY_MODEL_VIEWS = {
    'DatabaseAsync',
    'DatabaseView', 
    'DruidClusterModelView'
}

# Gamma Read-Only Views
"""
Views accessible to Gamma role users for data exploration.
"""
GAMMA_READ_ONLY_VIEWS = {
    'SqlMetricInlineView',
    'TableColumnInlineView', 
    'TableModelView',
    'DruidColumnInlineView',
    'DruidDatasourceModelView',
    'DruidMetricInlineView'
}

# Admin-Only Views
"""
Administrative interfaces requiring Admin role.
"""
ADMIN_ONLY_VIEWS = {
    'AccessRequestsModelView',
    'Manage',
    'SQL Lab',
    'Queries',
    'Refresh Druid Metadata',
    'ResetPasswordView',
    'RoleModelView', 
    'Security',
    'UserDBModelView',
    'UserLDAPModelView',
    'UserOAuthModelView',
    'UserOIDModelView',
    'UserRemoteUserModelView'
}

# Alpha-Only Views
"""
Views requiring Alpha role privileges.
"""
ALPHA_ONLY_VIEWS = {
    'Upload a CSV'
}

def get_user_roles():
    """
    Get current user's assigned roles.
    
    Returns:
    List of Role objects assigned to current user
    """

def get_user_datasources():
    """
    Get datasources accessible to current user.
    
    Returns:
    List of datasource instances user can access
    """

def merge_perm(permission_name, view_menu_name):
    """
    Create or retrieve permission object.
    
    Parameters:
    - permission_name: str, permission identifier
    - view_menu_name: str, view or resource name
    
    Returns:
    Permission object for role assignment
    """

def is_item_public(permission_name, view_menu_name):
    """
    Check if permission is assigned to public role.
    
    Parameters:
    - permission_name: str, permission to check
    - view_menu_name: str, view or resource name
    
    Returns:
    bool, True if accessible without authentication
    """

# Database Authentication (Default)
AUTH_TYPE = AUTH_DB
"""
Built-in user management with local database storage.

Features:
- User registration and password management
- Role-based access control
- Password reset functionality
- User profile management
"""

# LDAP Authentication
AUTH_TYPE = AUTH_LDAP
"""
LDAP/Active Directory integration.

Configuration:
- AUTH_LDAP_SERVER: LDAP server URL
- AUTH_LDAP_USE_TLS: Enable TLS encryption  
- AUTH_LDAP_USERNAME_FORMAT: Username format string
- AUTH_LDAP_SEARCH: User search configuration
"""

# OAuth Authentication
AUTH_TYPE = AUTH_OAUTH
"""
OAuth 2.0 provider integration.

Supported Providers:
- Google OAuth
- GitHub OAuth
- Azure Active Directory
- Custom OAuth providers
"""

# OpenID Connect
AUTH_TYPE = AUTH_OID
"""
OpenID Connect authentication.

Features:
- Standard OIDC flow implementation
- JWT token validation
- Automatic user provisioning
- Role mapping from claims
"""

# Remote User Authentication
AUTH_TYPE = AUTH_REMOTE_USER
"""
External authentication via HTTP headers.

Use Cases:
- Single sign-on (SSO) integration
- Proxy-based authentication
- Enterprise identity systems
"""

# Check database access
if security_manager.database_access(database):
    # User can access this database
    tables = database.all_table_names()

# Check schema access  
if security_manager.schema_access(database, 'public'):
    # User can access public schema
    schema_tables = get_schema_tables(database, 'public')

# Check table access
if security_manager.datasource_access(table):
    # User can query this table
    query_result = table.query(query_obj)

# Filter accessible datasources
accessible_tables = [
    table for table in all_tables
    if security_manager.datasource_access(table)
]

# Check administrative permissions
if security_manager.can_access('can_override_role_permissions', 'Superset'):
    # User can modify permissions
    grant_temporary_access(user, datasource)

# Check Alpha-level permissions
if security_manager.can_access('all_datasource_access', 'all_datasource_access'):
    # User has Alpha privileges
    return get_all_datasources()

class CustomSecurityManager(SupersetSecurityManager):
    """Custom security manager with organization-specific rules."""
    
    def datasource_access(self, datasource, user=None):
        """Custom datasource access logic."""
        
        # Check standard permissions first
        if super().datasource_access(datasource, user):
            return True
            
        # Custom business logic
        if user and hasattr(datasource, 'department'):
            return user.department == datasource.department
            
        return False

# Configure custom security manager
CUSTOM_SECURITY_MANAGER = CustomSecurityManager

from superset.security import has_access

@has_access
def protected_view():
    """View requiring authentication."""
    pass

@has_access_api
def protected_api():
    """API endpoint with permission checking."""
    pass

# All user actions are automatically logged
log_entry = Log(
    action='dashboard_view',
    user_id=current_user.id,
    dashboard_id=dashboard.id,
    dttm=datetime.now(),
    json=json.dumps(request_details)
)

# Users can request access to restricted datasources
access_request = DatasourceAccessRequest(
    datasource_type='table',
    datasource_id=table.id,
    changed_by_fk=current_user.id
)

# Administrators approve/deny requests
if security_manager.can_access('can_approve', 'Superset'):
    approve_access_request(access_request)