import json
import os

# Make it easy to read a json file
def read_json(path, default_value={}):
    if os.path.isfile(path):
        try:
            with open(path, "r") as file:
                json_string = file.read()
                json_dict   = json.loads(json_string)
                return json_dict
        except:
            pass
    return default_value

# Merge dictionary b into a
def merge_dicts(a, b):
    if b is None:
        return a

    output = a

    for k in b.keys():
        if k not in output.keys():
            if b[k] is not None:
                output[k] = b[k]

        if b[k] is None:
            if k in output.keys():
                output.pop(k, None)

        if isinstance(b[k], dict):
            if isinstance(output[k], dict):
                output[k] = merge_dicts(output[k], b[k])
                continue

        output[k] = b[k]
        if output[k] is None:
            del output[k]
            
    return output

def write_json(path, o):
    try:
        with open(path, "w") as file:
            file.write(json.dumps(o, indent=4))
    except:
        pass