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from __future__ import annotations
from argparse import ArgumentParser, Namespace
from abc import ABC, abstractmethod
import os
from pathlib import Path
from typing import TypeVar, overload
from cru import CruException, CruInternalError, CruPath
_F = TypeVar("_F")
class InternalAppException(CruInternalError):
pass
class AppPathError(CruException):
def __init__(self, message, _path: str | Path, *args, **kwargs):
super().__init__(message, *args, **kwargs)
self._path = str(_path)
@property
def path(self) -> str:
return self._path
class AppPath(ABC):
def __init__(
self,
name: str,
is_dir: bool,
/,
id: str | None = None,
description: str = "",
) -> None:
self._name = name
self._is_dir = is_dir
self._id = id or name
self._description = description
@property
@abstractmethod
def parent(self) -> AppPath | None: ...
@property
def name(self) -> str:
return self._name
@property
@abstractmethod
def app(self) -> AppBase: ...
@property
def id(self) -> str:
return self._id
@property
def description(self) -> str:
return self._description
@property
def is_dir(self) -> bool:
return self._is_dir
@property
def full_path(self) -> CruPath:
if self.parent is None:
return CruPath(self.name)
else:
return CruPath(self.parent.full_path, self.name)
@property
def full_path_str(self) -> str:
return str(self.full_path)
def check_parents(self, must_exist: bool = False) -> bool:
return self.full_path.check_parents_dir(must_exist)
def check_self(self, must_exist: bool = False) -> bool:
if not self.check_parents(must_exist):
return False
if not self.full_path.exists():
if not must_exist:
return False
raise AppPathError("Not exist.", self.full_path)
if self.is_dir:
if not self.full_path.is_dir():
raise AppPathError("Should be a directory, but not.", self.full_path)
else:
return False
else:
if not self.full_path.is_file():
raise AppPathError("Should be a file, but not.", self.full_path)
else:
return False
def ensure(self, create_file: bool = False) -> None:
e = self.check_self(False)
if not e:
os.makedirs(self.full_path.parent, exist_ok=True)
if self.is_dir:
os.mkdir(self.full_path)
elif create_file:
with open(self.full_path, "w") as f:
f.write("")
def add_subpath(
self,
name: str,
is_dir: bool,
/,
id: str | None = None,
description: str = "",
) -> AppFeaturePath:
return self.app.add_path(name, is_dir, self, id, description)
class AppFeaturePath(AppPath):
def __init__(
self,
parent: AppPath,
name: str,
is_dir: bool,
/,
id: str | None = None,
description: str = "",
) -> None:
super().__init__(name, is_dir, id, description)
self._parent = parent
@property
def parent(self) -> AppPath:
return self._parent
@property
def app(self) -> AppBase:
return self.parent.app
class AppRootPath(AppPath):
def __init__(self, app: AppBase, path: str):
super().__init__(path, True, "root", "Application root path.")
self._app = app
@property
def parent(self) -> None:
return None
@property
def app(self) -> AppBase:
return self._app
class AppFeatureProvider:
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.add_feature(self)
@property
def app(self) -> AppBase:
return self._app
@property
def name(self) -> str:
return self._name
class AppCommandFeatureProvider(AppFeatureProvider, ABC):
@abstractmethod
def add_arg_parser(self, arg_parser: ArgumentParser) -> None: ...
@abstractmethod
def run_command(self, args: Namespace) -> None: ...
class AppBase:
_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, root: str):
AppBase._instance = self
self._name = name
self._root = AppRootPath(self, root)
self._paths: list[AppFeaturePath] = []
self._features: list[AppFeatureProvider] = []
@property
def name(self) -> str:
return self._name
@property
def root(self) -> AppRootPath:
return self._root
@property
def features(self) -> list[AppFeatureProvider]:
return self._features
@property
def paths(self) -> list[AppFeaturePath]:
return self._paths
def add_feature(self, feature: AppFeatureProvider) -> AppFeatureProvider:
self._features.append(feature)
return feature
def add_path(
self,
name: str,
is_dir: bool,
/,
parent: AppPath | None = None,
id: str | None = None,
description: str = "",
) -> AppFeaturePath:
p = AppFeaturePath(
parent or self.root, name, is_dir, id=id, description=description
)
self._paths.append(p)
return p
@overload
def get_feature(self, feature: str) -> AppFeatureProvider: ...
@overload
def get_feature(self, feature: type[_F]) -> _F: ...
def get_feature(self, feature: str | type[_F]) -> AppFeatureProvider | _F:
if isinstance(feature, str):
for f in self._features:
if f.name == feature:
return f
elif isinstance(feature, type):
for f in self._features:
if isinstance(f, feature):
return f
else:
raise InternalAppException(
"Argument must be the name of feature or its class."
)
raise InternalAppException(f"Feature {feature} not found.")
def get_path(self, name: str) -> AppFeaturePath:
for p in self._paths:
if p.id == name or p.name == name:
return p
raise InternalAppException(f"Application path {name} not found.")
|
