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config.py
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config.py
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"""_This is the base config module._
This module is designed for processing json config files in user directory.
"""
__all__ = ['SSH', 'Base', 'Config']
__version__ = '0.2022.09.14.0'
__author__ = 'Andrey Luzhin'
from pathlib import Path
from dataclasses import dataclass, field, InitVar
from json import loads
from datetime import datetime as dt
#
# Internals
#
_PATHS_FILE: str = '~/.myconfig/paths.json'
_KEYS_FILE: str = '~/.myconfig/keys.json'
_CONNECTIONS_FILE: str = '~/.myconfig/connections.json'
#
# Public Classes
#
@dataclass
class SSH:
host: str = '127.0.0.1'
port: int = 22
login: str = 'root'
key: str | None = None # !!! подумать про пустой relative_path
password: str | None = field(default=None, repr=False)
def from_dict(self,
dic: dict[str, int | str],
relative_path: Path | None = None):
k: str
v: int | str
# приводим ключи к нижнему регистру,
# т.к. внутри секций всё должно быть однозначно
d: dict[str, int | str] = {k.lower(): v for k, v in dic.items()}
self.host = str(d['host'])
if d.get('port') is not None:
self.port = int(d['port'])
self.login = str(d['login'])
if d.get('key') is not None:
self.key = str(d['key'])
if relative_path is not None:
kf: Path = Path(self.key)
if kf.name == str(kf):
# если у файла нет уже указанного пути
kf = relative_path / kf
self.key = str(kf.expanduser().resolve())
if d.get('password') is not None:
self.password = str(d['password'])
return self
@dataclass
class Base:
"""Class for single base representation
equivalent to dict:
base_dict_example: dict = {
"ssh": {
"host": "ssh.local",
"port": 22, # optional, default 22
"login": "root",
"key": "private.key", # optional
"password": "", # optional
},
"engine": 'mysql+pymysql', # optional, default 'mysql+pymysql'
"server": "127.0.0.1",
"port": 3306, # optional, default 3306
"user": "admin",
"password": "",
"base": "mysql"
}
"""
ssh: SSH | None = None
engine: str = 'mysql+pymysql'
server: str = "127.0.0.1"
port: int = 3306
user: str = "root"
password: str = field(default='', repr=False)
base: str = 'mysql'
def from_dict(self, dic: dict, relative_path: Path | None = None):
k: str
v: int | str | dict[str, int | str]
# приводим ключи к нижнему регистру,
# т.к. внутри секций всё должно быть однозначно
d: dict[str, int | str] = {k.lower(): v for k, v in dic.items()}
if 'ssh' in d.keys() and isinstance(d['ssh'], dict):
# можно красивее if isinstance(d.get('ssh'), dict): но
# mypy ругается, даже если ниже подставить d.get('ssh')
self.ssh = SSH().from_dict(d['ssh'], relative_path)
if d.get('engine') is not None:
self.engine = str(d['engine'])
self.server = str(d['server'])
if d.get('port') is not None:
self.port = int(d['port'])
self.user = str(d['user'])
self.password = str(d['password'])
self.base = str(d['base'])
return self
@dataclass
class Config:
"""_Configuration class_
Load data from ~/.myconfig/*.json files (by default)"""
paths_file: InitVar[Path | str | None] = None
keys_file: InitVar[Path | str | None] = None
connections_file: InitVar[Path | str | None] = None
paths_path: Path = field(init=False)
keys_path: Path = field(init=False)
connections_path: Path = field(init=False)
paths: dict[str, Path] = field(init=False, repr=False)
keys: dict[str, str] = field(init=False, repr=False)
connections: dict[str, dict[str, Base]] = field(init=False, repr=False)
def __post_init__(self, paths_file, keys_file, connections_file) -> None:
self.load_paths_file(paths_file, transform_connections=False)
self.load_keys_file(keys_file)
self.load_connections_file(connections_file)
def load_paths_file(self,
file: Path | str | None = None,
transform_connections: bool = True) -> None:
self.paths_path = Path(_PATHS_FILE) if file is None else Path(file)
self.paths_path = self.paths_path.expanduser().resolve()
if self.paths_path.is_file():
json: dict = loads(self.paths_path.read_text())
self.paths = {}
k: str
v: str
for k, v in json.items():
self.paths[k] = Path(v).expanduser().resolve()
if transform_connections:
self.load_connections_file(self.connections_path)
def load_keys_file(self, file: Path | str | None = None) -> None:
self.keys_path = Path(_KEYS_FILE) if file is None else Path(file)
self.keys_path = self.keys_path.expanduser().resolve()
if self.keys_path.is_file():
json: dict = loads(self.keys_path.read_text())
self.keys = {}
k: str
v: str
for k, v in json.items():
self.keys[k] = v
def load_connections_file(self, file: Path | str | None = None) -> None:
self.connections_path = Path(
_CONNECTIONS_FILE) if file is None else Path(file)
self.connections_path = self.connections_path.expanduser().resolve()
if self.connections_path.is_file():
json: dict = loads(self.connections_path.read_text())
self.connections = {}
section_key: str
section_value: dict[str, dict[str,
int | str | dict[str, int | str]]]
for section_key, section_value in json.items():
bases: dict[str, Base] = {}
base_name: str
base_dict: dict[str, int | str | dict[str, int | str]]
for base_name, base_dict in section_value.items():
bases[base_name] = Base().from_dict(
base_dict, self.paths['ssh'])
self.connections[section_key] = bases
def make_filename(self,
name: str | Path,
in_path: str = 'export',
date: bool = True,
time: bool = True) -> str:
file_name: Path = Path(name)
name_extra: str = ''
if date:
name_extra += dt.today().strftime(r"_%Y%m%d")
if time:
name_extra += dt.today().strftime(r"_%H%M%S")
extensions: str = ''.join(file_name.suffixes)
file_path: Path = self.paths[in_path] if file_name.name == str(
name) else file_name.parent
file_name = file_path.expanduser().resolve() / Path(
file_name.name.removesuffix(extensions) + name_extra + extensions)
return str(file_name)
if __name__ == "__main__":
cfg = Config()
# print(cfg.make_filename('test.xlsx'))
# print(cfg.connections)
# q: Base = cfg.connections['replica']['qp']
# if q.ssh is not None:
# print(q.ssh.key_file)