nonebot2/nonebot/config.py

"""
配置
====

NoneBot 使用 `pydantic`_ 以及 `python-dotenv`_ 来读取配置。

配置项需符合特殊格式或 json 序列化格式。详情见 `pydantic Field Type`_ 文档。

.. _pydantic:
    https://pydantic-docs.helpmanual.io/
.. _python-dotenv:
    https://saurabh-kumar.com/python-dotenv/
.. _pydantic Field Type:
    https://pydantic-docs.helpmanual.io/usage/types/
"""
import os
from pathlib import Path

from datetime import timedelta
from ipaddress import IPv4Address
from typing import Any, Set, Dict, Tuple, Mapping, Optional

from pydantic import BaseSettings, IPvAnyAddress
from pydantic.env_settings import env_file_sentinel, SettingsSourceCallable
from pydantic.env_settings import read_env_file, SettingsError, EnvSettingsSource


class CustomEnvSettings(EnvSettingsSource):

    def __call__(self, settings: BaseSettings) -> Dict[str, Any]:
        """
        Build environment variables suitable for passing to the Model.
        """
        d: Dict[str, Optional[str]] = {}

        if settings.__config__.case_sensitive:
            env_vars: Mapping[str, Optional[str]] = os.environ
        else:
            env_vars = {k.lower(): v for k, v in os.environ.items()}

        env_file_vars: Dict[str, Optional[str]] = {}
        env_file = self.env_file if self.env_file != env_file_sentinel else settings.__config__.env_file
        env_file_encoding = self.env_file_encoding if self.env_file_encoding is not None else settings.__config__.env_file_encoding
        if env_file is not None:
            env_path = Path(env_file)
            if env_path.is_file():
                env_file_vars = read_env_file(
                    env_path,
                    encoding=env_file_encoding,
                    case_sensitive=settings.__config__.case_sensitive)
                env_vars = {**env_file_vars, **env_vars}

        for field in settings.__fields__.values():
            env_val: Optional[str] = None
            for env_name in field.field_info.extra["env_names"]:
                env_val = env_vars.get(env_name)
                if env_name in env_file_vars:
                    del env_file_vars[env_name]
                if env_val is not None:
                    break

            if env_val is None:
                continue

            if field.is_complex():
                try:
                    env_val = settings.__config__.json_loads(env_val)
                except ValueError as e:
                    raise SettingsError(
                        f'error parsing JSON for "{env_name}"'  # type: ignore
                    ) from e
            d[field.alias] = env_val

        if env_file_vars:
            for env_name, env_val in env_file_vars.items():
                if (env_val is None or
                        len(env_val) == 0) and env_name in env_vars:
                    env_val = env_vars[env_name]
                try:
                    if env_val:
                        env_val = settings.__config__.json_loads(env_val)
                except ValueError as e:
                    pass

                d[env_name] = env_val

        return d


class BaseConfig(BaseSettings):

    def __getattr__(self, name: str) -> Any:
        return self.__dict__.get(name)

    class Config:

        @classmethod
        def customise_sources(
            cls,
            init_settings: SettingsSourceCallable,
            env_settings: SettingsSourceCallable,
            file_secret_settings: SettingsSourceCallable,
        ) -> Tuple[SettingsSourceCallable, ...]:
            return init_settings, CustomEnvSettings(
                env_settings.env_file,
                env_settings.env_file_encoding), file_secret_settings


class Env(BaseConfig):
    """
    运行环境配置。大小写不敏感。

    将会从 ``nonebot.init 参数`` > ``环境变量`` > ``.env 环境配置文件`` 的优先级读取配置。
    """

    environment: str = "prod"
    """
    - **类型**: ``str``
    - **默认值**: ``"prod"``

    :说明:
      当前环境名。 NoneBot 将从 ``.env.{environment}`` 文件中加载配置。
    """

    class Config:
        extra = "allow"
        env_file = ".env"


class Config(BaseConfig):
    """
    NoneBot 主要配置。大小写不敏感。

    除了 NoneBot 的配置项外，还可以自行添加配置项到 ``.env.{environment}`` 文件中。
    这些配置将会在 json 反序列化后一起带入 ``Config`` 类中。
    """
    # nonebot configs
    driver: str = "nonebot.drivers.fastapi"
    """
    - **类型**: ``str``
    - **默认值**: ``"nonebot.drivers.fastapi"``

    :说明:

      NoneBot 运行所使用的 ``Driver`` 。继承自 ``nonebot.driver.BaseDriver`` 。
    """
    host: IPvAnyAddress = IPv4Address("127.0.0.1")  # type: ignore
    """
    - **类型**: ``IPvAnyAddress``
    - **默认值**: ``127.0.0.1``

    :说明:

      NoneBot 的 HTTP 和 WebSocket 服务端监听的 IP/主机名。
    """
    port: int = 8080
    """
    - **类型**: ``int``
    - **默认值**: ``8080``

    :说明:

      NoneBot 的 HTTP 和 WebSocket 服务端监听的端口。
    """
    debug: bool = False
    """
    - **类型**: ``bool``
    - **默认值**: ``False``

    :说明:

      是否以调试模式运行 NoneBot。
    """

    # bot connection configs
    api_root: Dict[str, str] = {}
    """
    - **类型**: ``Dict[str, str]``
    - **默认值**: ``{}``

    :说明:

      以机器人 ID 为键，上报地址为值的字典，环境变量或文件中应使用 json 序列化。

    :示例:

    .. code-block:: default

        API_ROOT={"123456": "http://127.0.0.1:5700"}
    """
    api_timeout: Optional[float] = 30.
    """
    - **类型**: ``Optional[float]``
    - **默认值**: ``30.``

    :说明:

      API 请求超时时间，单位: 秒。
    """
    access_token: Optional[str] = None
    """
    - **类型**: ``Optional[str]``
    - **默认值**: ``None``

    :说明:

      API 请求以及上报所需密钥，在请求头中携带。

    :示例:

    .. code-block:: http

        POST /cqhttp/ HTTP/1.1
        Authorization: Bearer kSLuTF2GC2Q4q4ugm3
    """
    secret: Optional[str] = None
    """
    - **类型**: ``Optional[str]``
    - **默认值**: ``None``

    :说明:

      HTTP POST 形式上报所需签名，在请求头中携带。

    :示例:

    .. code-block:: http

        POST /cqhttp/ HTTP/1.1
        X-Signature: sha1=f9ddd4863ace61e64f462d41ca311e3d2c1176e2
    """

    # bot runtime configs
    superusers: Set[str] = set()
    """
    - **类型**: ``Set[str]``
    - **默认值**: ``set()``

    :说明:

      机器人超级用户。

    :示例:

    .. code-block:: default

        SUPERUSERS=["12345789"]
    """
    nickname: Set[str] = set()
    """
    - **类型**: ``Set[str]``
    - **默认值**: ``set()``

    :说明:

      机器人昵称。
    """
    command_start: Set[str] = {"/"}
    """
    - **类型**: ``Set[str]``
    - **默认值**: ``{"/"}``

    :说明:

      命令的起始标记，用于判断一条消息是不是命令。
    """
    command_sep: Set[str] = {"."}
    """
    - **类型**: ``Set[str]``
    - **默认值**: ``{"."}``

    :说明:

      命令的分隔标记，用于将文本形式的命令切分为元组（实际的命令名）。
    """
    session_expire_timeout: timedelta = timedelta(minutes=2)
    """
    - **类型**: ``timedelta``
    - **默认值**: ``timedelta(minutes=2)``

    :说明:

      等待用户回复的超时时间。

    :示例:

    .. code-block:: default

        SESSION_EXPIRE_TIMEOUT=120  # 单位: 秒
        SESSION_EXPIRE_TIMEOUT=[DD ][HH:MM]SS[.ffffff]
        SESSION_EXPIRE_TIMEOUT=P[DD]DT[HH]H[MM]M[SS]S  # ISO 8601
    """

    # adapter configs
    # adapter configs are defined in adapter/config.py

    # custom configs
    # custom configs can be assigned during nonebot.init
    # or from env file using json loads

    class Config:
        extra = "allow"
        env_file = ".env.prod"