mirror of
https://github.com/solero/houdini.git
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302 lines
10 KiB
Python
302 lines
10 KiB
Python
import inspect
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import time
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import enum
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import os
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import asyncio
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from types import FunctionType
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from Houdini.Converters import IConverter
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from Houdini.Cooldown import _Cooldown, _CooldownMapping, BucketType, CooldownError
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def get_relative_function_path(function_obj):
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abs_function_file = inspect.getfile(function_obj)
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rel_function_file = os.path.relpath(abs_function_file)
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return rel_function_file
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def get_converter(component):
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if component.annotation is component.empty:
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return str
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return component.annotation
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async def do_conversion(converter, p, component_data):
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if IConverter.implementedBy(converter):
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converter_instance = converter(p, component_data)
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if asyncio.iscoroutinefunction(converter_instance.convert):
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return await converter_instance.convert()
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return converter_instance.convert()
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return converter(component_data)
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class _Packet:
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__slots__ = ['id']
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def __init__(self):
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self.id = None
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def __eq__(self, other):
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return self.id == other.id
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def __hash__(self):
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return hash(self.id)
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class XTPacket(_Packet):
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def __init__(self, *packet_id):
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super().__init__()
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self.id = '#'.join(packet_id)
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def __hash__(self):
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return hash(self.id)
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class XMLPacket(_Packet):
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def __init__(self, packet_id):
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super().__init__()
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self.id = packet_id
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class Priority(enum.Enum):
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Override = 3
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High = 2
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Low = 1
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class _Listener:
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__slots__ = ['packet', 'components', 'handler', 'priority',
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'cooldown', 'pass_packet', 'handler_file',
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'overrides', 'pre_login', 'checklist', 'instance']
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def __init__(self, packet, components, handler_function, **kwargs):
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self.packet = packet
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self.components = components
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self.handler = handler_function
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self.priority = kwargs.get('priority', Priority.Low)
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self.overrides = kwargs.get('overrides', [])
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self.cooldown = kwargs.get('cooldown')
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self.pass_packet = kwargs.get('pass_packet', False)
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self.checklist = kwargs.get('checklist', [])
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self.instance = None
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if type(self.overrides) is not list:
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self.overrides = [self.overrides]
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self.handler_file = get_relative_function_path(handler_function)
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def _can_run(self, p):
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return True if not self.checklist else all(predicate(self.packet, p) for predicate in self.checklist)
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def __hash__(self):
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return hash(self.__name__())
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def __name__(self):
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return "{}.{}".format(self.handler.__module__, self.handler.__name__)
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def __call__(self, p, packet_data):
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if self.cooldown is not None:
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bucket = self.cooldown.get_bucket(p)
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if bucket.is_cooling:
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raise RuntimeError('{} sent packet during cooldown'.format(p.peer_name))
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if not self._can_run(p):
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raise RuntimeError('Could not handle packet due to checklist failure')
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class _XTListener(_Listener):
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__slots__ = ['pre_login', 'rest_raw', 'keywords']
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.pre_login = kwargs.get('pre_login')
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self.rest_raw = kwargs.get('rest_raw', False)
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self.keywords = len(inspect.getfullargspec(self.handler).kwonlyargs)
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if self.rest_raw:
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self.components = self.components[:-1]
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async def __call__(self, p, packet_data):
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await super().__call__(p, packet_data)
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handler_call_arguments = [self.plugin] if self.plugin is not None else []
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handler_call_arguments += [self.packet, p] if self.pass_packet else [p]
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handler_call_keywords = {}
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arguments = iter(packet_data[:-self.keywords])
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ctx = _ConverterContext(None, arguments, None, p)
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for ctx.component in self.components:
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if ctx.component.annotation is ctx.component.empty and ctx.component.default is not ctx.component.empty:
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handler_call_arguments.append(ctx.component.default)
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next(ctx.arguments)
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elif ctx.component.kind == ctx.component.POSITIONAL_OR_KEYWORD:
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ctx.argument = next(ctx.arguments)
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converter = get_converter(ctx.component)
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handler_call_arguments.append(await do_conversion(converter, ctx))
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elif ctx.component.kind == ctx.component.VAR_POSITIONAL:
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for argument in ctx.arguments:
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ctx.argument = argument
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converter = get_converter(ctx.component)
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handler_call_arguments.append(await do_conversion(converter, ctx))
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elif ctx.component.kind == ctx.component.KEYWORD_ONLY:
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ctx.argument = packet_data[-self.keywords:][len(handler_call_keywords)]
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converter = get_converter(ctx.component)
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handler_call_keywords[ctx.component.name] = await do_conversion(converter, ctx)
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if self.rest_raw:
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handler_call_arguments.append(list(ctx.arguments))
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return await self.handler(*handler_call_arguments, **handler_call_keywords)
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elif not len(list(ctx.arguments)):
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return await self.handler(*handler_call_arguments, **handler_call_keywords)
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class _XMLListener(_Listener):
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__slots__ = ['pre_login']
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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async def __call__(self, p, packet_data):
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super().__call__(p, packet_data)
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handler_call_arguments = [self.instance] if self.instance is not None else []
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handler_call_arguments += [self.packet, p] if self.pass_packet else [p]
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for index, component in enumerate(self.components):
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if component.default is not component.empty:
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handler_call_arguments.append(component.default)
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elif component.kind == component.POSITIONAL_OR_KEYWORD:
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converter = get_converter(component)
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handler_call_arguments.append(await do_conversion(converter, p, packet_data))
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return await self.handler(*handler_call_arguments)
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def handler(packet, **kwargs):
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def decorator(handler_function):
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if not asyncio.iscoroutinefunction(handler_function):
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raise TypeError('All handlers must be a coroutine.')
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components = list(inspect.signature(handler_function).parameters.values())[1:]
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if not issubclass(type(packet), _Packet):
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raise TypeError('All handlers can only listen for either XMLPacket or XTPacket.')
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listener_class = _XTListener if isinstance(packet, XTPacket) else _XMLListener
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try:
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cooldown_object = handler_function.__cooldown
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del handler_function.__cooldown
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except AttributeError:
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cooldown_object = None
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try:
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checklist = handler_function.__checks
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del handler_function.__checks
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except AttributeError:
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checklist = []
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listener_object = listener_class(packet, components, handler_function,
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cooldown=cooldown_object, checklist=checklist,
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**kwargs)
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return listener_object
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return decorator
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def listener_exists(xt_listeners, xml_listeners, packet):
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listener_collection = xt_listeners if isinstance(packet, XTPacket) else xml_listeners
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return packet in listener_collection
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def is_listener(listener):
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return issubclass(type(listener), _Listener)
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def listeners_from_module(xt_listeners, xml_listeners, module):
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listener_objects = inspect.getmembers(module, is_listener)
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for listener_name, listener_object in listener_objects:
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listener_collection = xt_listeners if type(listener_object) == _XTListener else xml_listeners
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if listener_object.packet not in listener_collection:
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listener_collection[listener_object.packet] = []
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if listener_object not in listener_collection[listener_object.packet]:
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if listener_object.priority == Priority.High:
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listener_collection[listener_object.packet].insert(0, listener_object)
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elif listener_object.priority == Priority.Override:
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listener_collection[listener_object.packet] = [listener_object]
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else:
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listener_collection[listener_object.packet].append(listener_object)
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for listener_name, listener_object in listener_objects:
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listener_collection = xt_listeners if type(listener_object) == _XTListener else xml_listeners
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for override in listener_object.overrides:
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listener_collection[override.packet].remove(override)
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def remove_handlers_by_module(xt_listeners, xml_listeners, handler_module_path):
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def remove_handlers(remove_handler_items):
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for handler_id, handler_listeners in remove_handler_items:
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for handler_listener in handler_listeners:
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if handler_listener.handler_file == handler_module_path:
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handler_listeners.remove(handler_listener)
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remove_handlers(xt_listeners.items())
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remove_handlers(xml_listeners.items())
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def cooldown(per=1.0, rate=1, bucket_type=BucketType.Default, callback=None):
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def decorator(handler_function):
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handler_function.__cooldown = _CooldownMapping(callback, _Cooldown(per, rate, bucket_type))
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return handler_function
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return decorator
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def check(predicate):
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def decorator(handler_function):
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if not hasattr(handler_function, 'checks'):
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handler_function.__checks = []
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if not type(predicate) == FunctionType:
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raise TypeError('All handler checks must be a function')
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handler_function.__checks.append(predicate)
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return handler_function
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return decorator
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def allow_once():
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def check_for_packet(packet, p):
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return packet not in p.received_packets
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return check(check_for_packet)
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def player_attribute(**attrs):
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def check_for_attributes(_, p):
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for attr, value in attrs.items():
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if not getattr(p, attr) == value:
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return False
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return True
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return check(check_for_attributes)
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def player_data_attribute(**attrs):
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def check_for_attributes(_, p):
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for attr, value in attrs.items():
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if not getattr(p.data, attr) == value:
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return False
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return True
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return check(check_for_attributes)
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def player_in_room(*room_ids):
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def check_room_id(_, p):
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return p.room.ID in room_ids
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return check(check_room_id)
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