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editing: windows.py

from __future__ import annotations

import ctypes
import os
import sys
from functools import lru_cache
from typing import Callable

from .api import PlatformDirsABC

class Windows(PlatformDirsABC):
    """`MSDN on where to store app data files
    <http://support.microsoft.com/default.aspx?scid=kb;en-us;310294#XSLTH3194121123120121120120>`_.
    Makes use of the
    `appname <platformdirs.api.PlatformDirsABC.appname>`,
    `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`,
    `version <platformdirs.api.PlatformDirsABC.version>`,
    `roaming <platformdirs.api.PlatformDirsABC.roaming>`,
    `opinion <platformdirs.api.PlatformDirsABC.opinion>`."""

@property
    def user_data_dir(self) -> str:
        """
        :return: data directory tied to the user, e.g.
         ``%USERPROFILE%\\AppData\\Local\\$appauthor\\$appname`` (not roaming) or
         ``%USERPROFILE%\\AppData\\Roaming\\$appauthor\\$appname`` (roaming)
        """
        const = "CSIDL_APPDATA" if self.roaming else "CSIDL_LOCAL_APPDATA"
        path = os.path.normpath(get_win_folder(const))
        return self._append_parts(path)

def _append_parts(self, path: str, *, opinion_value: str | None = None) -> str:
        params = []
        if self.appname:
            if self.appauthor is not False:
                author = self.appauthor or self.appname
                params.append(author)
            params.append(self.appname)
            if opinion_value is not None and self.opinion:
                params.append(opinion_value)
            if self.version:
                params.append(self.version)
        return os.path.join(path, *params)

@property
    def site_data_dir(self) -> str:
        """:return: data directory shared by users, e.g. ``C:\\ProgramData\\$appauthor\\$appname``"""
        path = os.path.normpath(get_win_folder("CSIDL_COMMON_APPDATA"))
        return self._append_parts(path)

@property
    def user_config_dir(self) -> str:
        """:return: config directory tied to the user, same as `user_data_dir`"""
        return self.user_data_dir

@property
    def site_config_dir(self) -> str:
        """:return: config directory shared by the users, same as `site_data_dir`"""
        return self.site_data_dir

@property
    def user_cache_dir(self) -> str:
        """
        :return: cache directory tied to the user (if opinionated with ``Cache`` folder within ``$appname``) e.g.
         ``%USERPROFILE%\\AppData\\Local\\$appauthor\\$appname\\Cache\\$version``
        """
        path = os.path.normpath(get_win_folder("CSIDL_LOCAL_APPDATA"))
        return self._append_parts(path, opinion_value="Cache")

@property
    def user_state_dir(self) -> str:
        """:return: state directory tied to the user, same as `user_data_dir`"""
        return self.user_data_dir

@property
    def user_log_dir(self) -> str:
        """
        :return: log directory tied to the user, same as `user_data_dir` if not opinionated else ``Logs`` in it
        """
        path = self.user_data_dir
        if self.opinion:
            path = os.path.join(path, "Logs")
        return path

@property
    def user_documents_dir(self) -> str:
        """
        :return: documents directory tied to the user e.g. ``%USERPROFILE%\\Documents``
        """
        return os.path.normpath(get_win_folder("CSIDL_PERSONAL"))

@property
    def user_runtime_dir(self) -> str:
        """
        :return: runtime directory tied to the user, e.g.
         ``%USERPROFILE%\\AppData\\Local\\Temp\\$appauthor\\$appname``
        """
        path = os.path.normpath(os.path.join(get_win_folder("CSIDL_LOCAL_APPDATA"), "Temp"))
        return self._append_parts(path)

def get_win_folder_from_env_vars(csidl_name: str) -> str:
    """Get folder from environment variables."""
    if csidl_name == "CSIDL_PERSONAL":  # does not have an environment name
        return os.path.join(os.path.normpath(os.environ["USERPROFILE"]), "Documents")

env_var_name = {
        "CSIDL_APPDATA": "APPDATA",
        "CSIDL_COMMON_APPDATA": "ALLUSERSPROFILE",
        "CSIDL_LOCAL_APPDATA": "LOCALAPPDATA",
    }.get(csidl_name)
    if env_var_name is None:
        raise ValueError(f"Unknown CSIDL name: {csidl_name}")
    result = os.environ.get(env_var_name)
    if result is None:
        raise ValueError(f"Unset environment variable: {env_var_name}")
    return result

def get_win_folder_from_registry(csidl_name: str) -> str:
    """Get folder from the registry.

This is a fallback technique at best. I'm not sure if using the
    registry for this guarantees us the correct answer for all CSIDL_*
    names.
    """
    shell_folder_name = {
        "CSIDL_APPDATA": "AppData",
        "CSIDL_COMMON_APPDATA": "Common AppData",
        "CSIDL_LOCAL_APPDATA": "Local AppData",
        "CSIDL_PERSONAL": "Personal",
    }.get(csidl_name)
    if shell_folder_name is None:
        raise ValueError(f"Unknown CSIDL name: {csidl_name}")
    if sys.platform != "win32":  # only needed for mypy type checker to know that this code runs only on Windows
        raise NotImplementedError
    import winreg

key = winreg.OpenKey(winreg.HKEY_CURRENT_USER, r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders")
    directory, _ = winreg.QueryValueEx(key, shell_folder_name)
    return str(directory)

def get_win_folder_via_ctypes(csidl_name: str) -> str:
    """Get folder with ctypes."""
    csidl_const = {
        "CSIDL_APPDATA": 26,
        "CSIDL_COMMON_APPDATA": 35,
        "CSIDL_LOCAL_APPDATA": 28,
        "CSIDL_PERSONAL": 5,
    }.get(csidl_name)
    if csidl_const is None:
        raise ValueError(f"Unknown CSIDL name: {csidl_name}")

buf = ctypes.create_unicode_buffer(1024)
    windll = getattr(ctypes, "windll")  # noqa: B009 # using getattr to avoid false positive with mypy type checker
    windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)

# Downgrade to short path name if it has highbit chars.
    if any(ord(c) > 255 for c in buf):
        buf2 = ctypes.create_unicode_buffer(1024)
        if windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
            buf = buf2

return buf.value

def _pick_get_win_folder() -> Callable[[str], str]:
    if hasattr(ctypes, "windll"):
        return get_win_folder_via_ctypes
    try:
        import winreg  # noqa: F401
    except ImportError:
        return get_win_folder_from_env_vars
    else:
        return get_win_folder_from_registry

get_win_folder = lru_cache(maxsize=None)(_pick_get_win_folder())

__all__ = [
    "Windows",
]

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