Module examples.simple

'''
Expand the code to view.

Run:
    $ python simple.py
    <class '__main__.HasADate'>: {"d": "2020-05-28T02:46:05", "i": 2}
    <class '__main__.Point'>: {"x": 21, "y": 12}
'''
from dataclasses import dataclass
from datetime import datetime

from xtelligent_serial import deserializer, serializer, serialization
from xtelligent_serial.json import to_json, from_json

# pylint: disable=not-callable


@serializer(datetime)
def dthandler(dt: datetime):
    return dt.isoformat()


@deserializer(datetime)
def str2dt(datestr: str):
    return datetime.fromisoformat(datestr)


@dataclass(frozen=True)
class HasADate:
    d: datetime
    i: int


def try_serialization(f):
    json = to_json(f)
    cls = f.__class__
    print(f'{cls}:', json)
    s = from_json(cls, json)
    return f, s


first_instance, second_instance = try_serialization(
    HasADate(datetime.utcfromtimestamp(1590633965), 2))
assert first_instance.d == second_instance.d
assert first_instance.i == second_instance.i


@serialization
class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    @classmethod
    def __serializer__(cls, instance):
        return {'x': instance.x, 'y': instance.y}

    @classmethod
    def __deserializer__(cls, raw_data):
        return cls(raw_data['x'], raw_data['y'])


first_instance, second_instance = try_serialization(Point(21, 12))
assert first_instance.x == second_instance.x
assert first_instance.y == second_instance.y