parameters.py

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import json
from pathlib import Path
from copy import deepcopy
import sys
 
class Parameters:
    def __init__(self):
        self.__data__ = None
 
    def __load_parameters(self):
        try:
            text = (Path(__file__).resolve().parent / 'static' / 'config' / 'parameters.json').read_text()
            self.__data__ = json.loads(text)
        except Exception as e:
            print(f"Error loading parameters: {e}", file=sys.stderr)
            self.__data__ = {}
            raise
 
    def get(self, key):
        if self.__data__ is None:
            self.__load_parameters()
        try:
            return deepcopy(self.__data__[key])
        except KeyError:
            raise KeyError(f"Parameter '{key}' does not exist. Available parameters: {list(self.__data__.keys())}")
 
    def save(self, key, value):
        if self.__data__ is None:
            self.__load_parameters()
        self.__data__[key] = value
        # Save the updated parameters back to the file
        with open((Path(__file__).resolve().parent / 'static' / 'config' / 'parameters.json'), 'w') as f:
            json.dump(self.__data__, f, indent=2)
 
    def remove(self, key):
        if self.__data__ is None:
            self.__load_parameters()
        if key in self.__data__:
            del self.__data__[key]
            # Save the updated parameters back to the file
            with open((Path(__file__).resolve().parent / 'static' / 'config' / 'parameters.json'), 'w') as f:
                json.dump(self.__data__, f, indent=2)
        else:
            raise AttributeError(f"Parameter '{key}' does not exist.")
        
    def __setattr__(self, key, value):
        if key == '__data__':
            super().__setattr__(key, value)
        else:
            self.save(key, value)
 
    def __delattr__(self, name):
        if name != '__data__':
            self.remove(name)
 
    def __getitem__(self, key):
        return self.get(key)
    
    def __setitem__(self, key, value):
        self.save(key, value)
    
    def __getattr__(self, key):
        return self.get(key)
    
    def paramsAvailable(self):
        if self.__data__ is None:
            self.__load_parameters()
        return list(self.__data__.keys())
 
Parameters = Parameters()