Class Enhancement and Convenience Functions

def addConvenienceForClass(classname, methods):
    """
    Add Python methods to an Objective-C class.
    
    Args:
        classname (str): Name of the Objective-C class to enhance
        methods (dict): Dictionary mapping method names to functions
        
    Enhances the specified class with additional Python methods
    that integrate seamlessly with existing Objective-C functionality.
    """

def registerABCForClass(classname, *abc_class):
    """
    Register Abstract Base Class for an Objective-C class.
    
    Args:
        classname (str): Name of the Objective-C class
        *abc_class: One or more ABC classes to register
        
    Enables isinstance() and issubclass() checks between
    Objective-C classes and Python ABCs.
    """

def registerUnavailableMethod(classname, selector):
    """
    Mark a selector as unavailable on a class.
    
    Args:
        classname (str): Name of the Objective-C class
        selector (str): Selector to mark as unavailable
        
    Prevents access to specific methods that may be inappropriate
    or dangerous when called from Python.
    """

def registerNewKeywords(classname, keywords, methodname):
    """
    Register keyword arguments for __new__ method.
    
    Args:
        classname (str): Name of the Objective-C class
        keywords (list): List of keyword argument names
        methodname (str): Method name for initialization
        
    Enables Python-style keyword arguments for object creation.
    """

def registerNewKeywordsFromSelector(classname, selector):
    """
    Generate keyword arguments from selector signature.
    
    Args:
        classname (str): Name of the Objective-C class
        selector (str): Selector to analyze for keyword generation
        
    Automatically creates keyword arguments based on selector names.
    """

def addConvenienceForBasicMapping(name, readonly=False):
    """
    Add mapping convenience methods to a class.
    
    Args:
        name (str): Class name to enhance
        readonly (bool): Whether mapping should be read-only
        
    Adds Python dict-like methods (__getitem__, __setitem__, etc.)
    to Objective-C classes that represent key-value collections.
    """

def addConvenienceForBasicSequence(name, readonly=False):
    """
    Add sequence convenience methods to a class.
    
    Args:
        name (str): Class name to enhance
        readonly (bool): Whether sequence should be read-only
        
    Adds Python list-like methods (__getitem__, __setitem__, __len__, etc.)
    to Objective-C classes that represent ordered collections.
    """

import objc
from objc import (addConvenienceForClass, registerABCForClass, 
                  registerUnavailableMethod, addConvenienceForBasicSequence)
from collections.abc import Sequence, MutableSequence

# Add convenience methods to NSString
def python_split(self, separator=" "):
    """Add Python-style split method to NSString."""
    return str(self).split(separator)

def python_strip(self):
    """Add Python-style strip method to NSString."""
    return str(self).strip()

addConvenienceForClass("NSString", {
    "split": python_split,
    "strip": python_strip
})

# Now NSString instances have Python-style methods
ns_string = objc.lookUpClass("NSString").stringWithString_("  hello world  ")
parts = ns_string.split(" ")  # ['', '', 'hello', 'world', '', '']
clean = ns_string.strip()     # "hello world"

# Register ABC for better type checking
registerABCForClass("NSArray", Sequence)
registerABCForClass("NSMutableArray", MutableSequence)

# Now isinstance checks work
ns_array = objc.lookUpClass("NSArray").arrayWithObjects_("a", "b", "c")
print(isinstance(ns_array, Sequence))  # True

ns_mutable = objc.lookUpClass("NSMutableArray").arrayWithObjects_("x", "y")
print(isinstance(ns_mutable, MutableSequence))  # True

# Mark dangerous methods as unavailable
registerUnavailableMethod("NSFileManager", "removeItemAtPath:error:")

# Add sequence convenience to custom collection class
addConvenienceForBasicSequence("MyCustomArray", readonly=False)

# Register keyword arguments for cleaner object creation
registerNewKeywords("NSRect", ["x", "y", "width", "height"], "__new__")

# Now can create with keywords (if properly implemented)
# rect = NSRect(x=10, y=20, width=100, height=50)

# Pattern 1: Adding Python idioms to Objective-C collections
def enhance_nsarray():
    def python_contains(self, item):
        """Add 'in' operator support."""
        return self.containsObject_(item)
    
    def python_iter(self):
        """Add iterator support."""
        for i in range(self.count()):
            yield self.objectAtIndex_(i)
    
    addConvenienceForClass("NSArray", {
        "__contains__": python_contains,
        "__iter__": python_iter
    })

enhance_nsarray()

# Now NSArray works more like Python lists
ns_array = objc.lookUpClass("NSArray").arrayWithObjects_("a", "b", "c")
print("b" in ns_array)  # True
for item in ns_array:   # Iteration works
    print(item)

# Pattern 2: Adding utility methods
def enhance_nsurl():
    def to_path(self):
        """Convert NSURL to pathlib.Path."""
        from pathlib import Path
        return Path(self.path())
    
    def read_text(self):
        """Read URL content as text."""
        data = objc.lookUpClass("NSData").dataWithContentsOfURL_(self)
        if data:
            return str(data, 'utf-8')
        return None
    
    addConvenienceForClass("NSURL", {
        "to_path": to_path,
        "read_text": read_text
    })

enhance_nsurl()

# Usage with enhanced NSURL
file_url = objc.lookUpClass("NSURL").fileURLWithPath_("/tmp/test.txt")
path = file_url.to_path()  # Returns pathlib.Path object
content = file_url.read_text()  # Read file content