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from __future__ import annotations
from argparse import ArgumentParser, Namespace
from abc import ABC, abstractmethod
from collections.abc import Iterable
from cru import CruIterator, CruInternalError
from cru.app import ApplicationPath, CruApplication
class AppFeatureProvider(ABC):
def __init__(self, name: str, /, app: AppBase | None = None):
super().__init__()
self._name = name
self._app = app if app else AppBase.get_instance()
self._app_paths: list[ApplicationPath] = []
self.app.add_app_feature(self)
@property
def app(self) -> AppBase:
return self._app
@property
def name(self) -> str:
return self._name
@property
def app_paths(self) -> list[ApplicationPath]:
return self._app_paths
def add_app_path(self, subpath: str, is_dir: bool) -> ApplicationPath:
p = ApplicationPath(self.app.app_dir, subpath, is_dir)
self._app_paths.append(p)
return p
@abstractmethod
def add_arg_parser(self, arg_parser: ArgumentParser) -> None: ...
@abstractmethod
def run_command(self, args: Namespace) -> None: ...
class AppBase(CruApplication):
_instance: AppBase | None = None
@staticmethod
def get_instance() -> AppBase:
if AppBase._instance is None:
raise CruInternalError("App instance not initialized")
return AppBase._instance
def __init__(self, name: str, app_dir: str):
super().__init__(name)
AppBase._instance = self
self._app_dir = app_dir
self._app_features: list[AppFeatureProvider] = []
@property
def app_dir(self) -> str:
return self._app_dir
@property
def app_features(self) -> list[AppFeatureProvider]:
return self._app_features
@property
def app_paths(self) -> Iterable[ApplicationPath]:
return (
CruIterator(self._app_features).transform(lambda x: x.app_paths).flatten(1)
)
def add_app_feature(self, feature: AppFeatureProvider) -> None:
self._app_features.append(feature)
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