getConfigEntry

#!/usr/bin/env python3
import argparse
import json
import sys

"""
Function to get any value from database
Example usage:

`setConfigEntry configuration.network.hostname`
would return the hostname of the network

in BASH use:
NAME=$(getConfigEntry configuration.network.hostname 2>&1)
echo $NAME
"""


parser = argparse.ArgumentParser()
parser.add_argument("key", help="dot (.) separated JSON value to get from Aroio_DB", type=str)
args = parser.parse_args()

databasePath = "/tmp/aroio_db.json"
SEPARATOR = '.'


def load_aroio() -> str:
    """Reads data of Aroio from userconfig"""
    try:
        with open(databasePath) as f:
            aroio_db = json.load(f)
            return aroio_db
    except IOError:
        print("Database not accessable, generate Database.")


def get_key_from_json(obj: json):
    for i in args.key.split(SEPARATOR):
        if i in obj:
            obj = obj[i]
        else:
            return None
    return obj


def main():
    aroio = load_aroio()
    value = get_key_from_json(aroio)
    sys.exit(value)


if __name__ == '__main__':
    main()