Protocols and Handlers

# Protocol: MEExtension
def handlerForMessageActions(self):
    """
    Return a handler for message actions.
    
    Returns:
        Handler object conforming to MEMessageActionHandler protocol, or None
    """

def handlerForMessageSecurity(self):
    """
    Return a handler for message security operations.
    
    Returns:
        Handler object conforming to MEMessageSecurityHandler protocol, or None
    """

def handlerForContentBlocker(self):
    """
    Return a handler for content blocking.
    
    Returns:
        Handler object conforming to MEContentBlocker protocol, or None
    """

def handlerForComposeSession_(self, session):
    """
    Return a handler for compose sessions.
    
    Args:
        session: MEComposeSession instance
        
    Returns:
        Handler object conforming to MEComposeSessionHandler protocol, or None
    """

# Protocol: MEMessageDecoder
def decodedMessageForMessageData_(self, messageData):
    """
    Decode message data and return a decoded message.
    
    Args:
        messageData: NSData containing the raw message data
        
    Returns:
        MEDecodedMessage: Decoded message object, or None if decoding failed
    """

# Protocol: MEMessageEncoder
def getEncodingStatusForMessage_composeContext_completionHandler_(
    self, message, composeContext, completionHandler
):
    """
    Get encoding status for a message.
    
    Args:
        message: The message to get encoding status for
        composeContext: MEComposeContext with compose information
        completionHandler: Completion handler: (MEOutgoingMessageEncodingStatus) -> None
    """

def encodeMessage_composeContext_completionHandler_(
    self, message, composeContext, completionHandler
):
    """
    Encode a message for sending.
    
    Args:
        message: The message to encode
        composeContext: MEComposeContext with compose information
        completionHandler: Completion handler: (MEMessageEncodingResult) -> None
    """

# Protocol: MEMessageSecurityHandler
def extensionViewControllerForMessageContext_(self, messageContext):
    """
    Return a view controller for the message context.
    
    Args:
        messageContext: Context information for the message
        
    Returns:
        UIViewController: View controller for displaying security information
    """

def extensionViewControllerForMessageSigners_(self, messageSigners):
    """
    Return a view controller for message signers.
    
    Args:
        messageSigners: List of MEMessageSigner objects
        
    Returns:
        UIViewController: View controller for displaying signer information
    """

def primaryActionClickedForMessageContext_completionHandler_(
    self, messageContext, completionHandler
):
    """
    Handle primary action click for a message.
    
    Args:
        messageContext: Context information for the message
        completionHandler: Completion handler: (NSError or None) -> None
    """

# Protocol: MEMessageActionHandler
def decideActionForMessage_completionHandler_(self, message, completionHandler):
    """
    Decide what action to take for a message.
    
    Args:
        message: MEMessage object to make a decision about
        completionHandler: Completion handler: (MEMessageActionDecision) -> None
    """

# Protocol: MEContentBlocker  
def contentRulesJSON(self):
    """
    Return JSON string containing content blocking rules.
    
    Returns:
        str: JSON string with content blocking rules in Safari Content Blocker format
    """

# Protocol: MEComposeSessionHandler
def mailComposeSessionDidBegin_(self, session):
    """
    Called when a compose session begins.
    
    Args:
        session: MEComposeSession that began
    """

def mailComposeSessionDidEnd_(self, session):
    """
    Called when a compose session ends.
    
    Args:
        session: MEComposeSession that ended
    """

def viewControllerForSession_(self, session):
    """
    Return a view controller for the compose session.
    
    Args:
        session: MEComposeSession instance
        
    Returns:
        UIViewController: View controller for the compose session
    """

def session_annotateAddressesWithCompletionHandler_(self, session, completionHandler):
    """
    Annotate addresses in a compose session.
    
    Args:
        session: MEComposeSession instance
        completionHandler: Completion handler: (List[MEAddressAnnotation]) -> None
    """

def session_canSendMessageWithCompletionHandler_(self, session, completionHandler):
    """
    Check if a message can be sent in the session.
    
    Args:
        session: MEComposeSession instance
        completionHandler: Completion handler: (NSError or None) -> None
    """

def additionalHeadersForSession_(self, session):
    """
    Provide additional headers for the session.
    
    Args:
        session: MEComposeSession instance
        
    Returns:
        dict: Dictionary of additional headers, or None
    """

def requiredHeaders(self):
    """
    Return required headers for compose sessions.
    
    Returns:
        List[str]: List of required header names, or None
    """

import MailKit
from Foundation import NSObject

class CustomMessageDecoder(NSObject):
    """Custom message decoder implementation."""
    
    def decodedMessageForMessageData_(self, messageData):
        """Decode custom message format."""
        try:
            # Decode the message data
            # This is where you would implement your custom decoding logic
            decoded_data = self.decode_custom_format(messageData)
            
            # Create security information
            security_info = MailKit.MEMessageSecurityInformation.alloc().initWithSigners_isEncrypted_signingError_encryptionError_(
                signers=[],
                isEncrypted=False,
                signingError=None,
                encryptionError=None
            )
            
            # Create decoded message
            decoded_message = MailKit.MEDecodedMessage.alloc().initWithData_securityInformation_context_(
                data=decoded_data,
                securityInformation=security_info,
                context=None
            )
            
            return decoded_message
        except Exception as e:
            print(f"Failed to decode message: {e}")
            return None
    
    def decode_custom_format(self, data):
        """Implement your custom decoding logic here."""
        # Placeholder for custom decoding
        return data

import MailKit
from Foundation import NSObject

class CustomActionHandler(NSObject):
    """Custom message action handler implementation."""
    
    def decideActionForMessage_completionHandler_(self, message, completionHandler):
        """Decide action based on message analysis."""
        try:
            # Analyze message to determine action
            action_decision = self.analyze_message_for_action(message)
            
            # Call completion handler with decision
            completionHandler(action_decision)
        except Exception as e:
            print(f"Failed to decide action: {e}")
            completionHandler(None)
    
    def analyze_message_for_action(self, message):
        """Analyze message and return action decision."""
        # Placeholder for message analysis logic
        # Return appropriate MEMessageActionDecision
        return None

import MailKit
from Foundation import NSObject
import json

class CustomContentBlocker(NSObject):
    """Custom content blocker implementation."""
    
    def contentRulesJSON(self):
        """Return content blocking rules in JSON format."""
        try:
            # Define content blocking rules
            rules = [
                {
                    "trigger": {
                        "url-filter": ".*tracking.*",
                        "resource-type": ["image"]
                    },
                    "action": {
                        "type": "block"
                    }
                },
                {
                    "trigger": {
                        "url-filter": ".*analytics.*"
                    },
                    "action": {
                        "type": "block"
                    }
                }
            ]
            
            return json.dumps(rules)
        except Exception as e:
            print(f"Failed to generate content rules: {e}")
            return "[]"

import MailKit
from Foundation import NSObject

class CustomComposeSessionHandler(NSObject):
    """Custom compose session handler implementation."""
    
    def mailComposeSessionDidBegin_(self, session):
        """Handle compose session beginning."""
        print("Compose session began")
        # Perform any initialization needed for the session
    
    def mailComposeSessionDidEnd_(self, session):
        """Handle compose session ending."""
        print("Compose session ended")
        # Perform any cleanup needed
    
    def viewControllerForSession_(self, session):
        """Return custom view controller for session."""
        # Return a custom view controller if needed
        return None
    
    def session_annotateAddressesWithCompletionHandler_(self, session, completionHandler):
        """Annotate addresses in the session."""
        try:
            # Create address annotations
            annotations = self.create_address_annotations(session)
            completionHandler(annotations)
        except Exception as e:
            print(f"Failed to annotate addresses: {e}")
            completionHandler([])
    
    def session_canSendMessageWithCompletionHandler_(self, session, completionHandler):
        """Check if message can be sent."""
        try:
            # Validate message for sending
            can_send = self.validate_message_for_sending(session)
            if can_send:
                completionHandler(None)  # No error means can send
            else:
                # Create error for why message cannot be sent
                error = self.create_validation_error()
                completionHandler(error)
        except Exception as e:
            print(f"Failed to validate message: {e}")
            completionHandler(e)
    
    def additionalHeadersForSession_(self, session):
        """Provide additional headers."""
        return {
            "X-Custom-Extension": "CustomMailExtension",
            "X-Version": "1.0"
        }
    
    def requiredHeaders(self):
        """Return required headers."""
        return ["Subject", "To"]
    
    def create_address_annotations(self, session):
        """Create address annotations for the session."""
        # Placeholder for annotation creation logic
        return []
    
    def validate_message_for_sending(self, session):
        """Validate if message can be sent."""
        # Placeholder for validation logic
        return True
    
    def create_validation_error(self):
        """Create validation error."""
        # Placeholder for error creation
        return None

import MailKit
from Foundation import NSObject

class CompleteMailExtension(NSObject):
    """Complete Mail extension implementing multiple protocols."""
    
    def __init__(self):
        super().__init__()
        self.action_handler = CustomActionHandler.alloc().init()
        self.security_handler = CustomSecurityHandler.alloc().init()
        self.content_blocker = CustomContentBlocker.alloc().init()
    
    # MEExtension protocol methods
    def handlerForMessageActions(self):
        """Return message action handler."""
        return self.action_handler
    
    def handlerForMessageSecurity(self):
        """Return message security handler."""
        return self.security_handler
    
    def handlerForContentBlocker(self):
        """Return content blocker handler."""
        return self.content_blocker
    
    def handlerForComposeSession_(self, session):
        """Return compose session handler."""
        return CustomComposeSessionHandler.alloc().init()

# Usage in extension main
# extension = CompleteMailExtension.alloc().init()