Add Config class

motor_passo/__init__.py

@@ -0,0 +1,7 @@
+from appdirs import AppDirs
+from pathlib import Path
+
+dirs = AppDirs("spectrometer", appauthor="uff")
+log_dir = Path(dirs.user_log_dir)  # XXX
+config_dir = Path(dirs.user_config_dir)  # XXX
+data_dir = Path(dirs.user_data_dir)

motor_passo/config.py

@@ -0,0 +1,51 @@
+import json
+import logging
+
+from dataclasses import dataclass, field
+from motor_passo import config_dir
+from pathlib import Path
+
+
+@dataclass
+class Config:
+    config_path: Path
+
+    _json: dict = field(default_factory=dict)
+    _l: logging.Logger = None
+
+    def __post_init__(self):
+        self._l = logging.getLogger(__name__).getChild(self.__class__.__name__)
+
+    def load(self) -> bool:
+        self.config_path = self.config_path.expanduser()
+
+        self._l.info(f"Carregando configuração de {self.config_path}")
+
+        try:
+            with self.config_path.open("r") as f:
+                self._json = json.load(f)
+
+            for k, v in self._json.items():
+                setattr(self, k, v)
+        except FileNotFoundError:
+            self._l.exception("Arquivo de configuração não existe")
+            raise RuntimeError()  # TODO: Usar exception customizada
+        except json.JSONDecodeError:
+            self._l.exception("Configuração inválida")
+            raise RuntimeError()  # TODO: Usar exception customizada
+
+        return True
+
+
+_configs = {}
+
+
+def get_config(name: str) -> Config:
+    global _configs
+
+    if name in _configs:
+        return _configs[name]
+
+    _configs[name] = Config(config_path=config_dir / name)
+    _configs[name].load()
+    return _configs[name]

poetry.lock

@@ -1,5 +1,17 @@
 # This file is automatically @generated by Poetry and should not be changed by hand.
 
+[[package]]
+name = "appdirs"
+version = "1.4.4"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+category = "main"
+optional = false
+python-versions = "*"
+files = [
+    {file = "appdirs-1.4.4-py2.py3-none-any.whl", hash = "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"},
+    {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
+]
+
 [[package]]
 name = "flake8"
 version = "6.0.0"
@@ -113,4 +125,4 @@ tomli = ">=2.0.1"
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "88cff2fd871e1c4248abedb8ef45af99e90ac4ef620fe4ed32fb752b63fc6502"
+content-hash = "2996806b100690aaf6436bfd564c5c90567d3ec71725e9b177aab422e6ea66b1"

pyproject.toml

@@ -10,6 +10,7 @@ packages = [{include = "motor_passo"}]
 python = "^3.9"
 rpi-gpio = "^0.7.1"
 paho-mqtt = "^1.6.1"
+appdirs = "^1.4.4"
 
 
 [tool.poetry.group.dev.dependencies]