54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
from typing import Iterable, Mapping, Optional, Union
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from sqlalchemy import Column, Integer, ForeignKey
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from platypush.common.db import Base
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from platypush.common.sensors import Numeric
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from .sensors import RawSensor
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if 'three_axis_sensor' not in Base.metadata:
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class ThreeAxisSensor(RawSensor):
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"""
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An entity that measures a time duration.
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"""
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__tablename__ = 'three_axis_sensor'
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id = Column(
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Integer, ForeignKey(RawSensor.id, ondelete='CASCADE'), primary_key=True
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)
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__mapper_args__ = {
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'polymorphic_identity': __tablename__,
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}
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@RawSensor.value.setter
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def value(
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self, value: Optional[Union[Iterable[Numeric], Mapping[str, Numeric]]]
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):
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"""
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Validates and normalizes the given value to a list of 3 numeric
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values.
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"""
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if value is None:
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return
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if isinstance(value, dict):
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assert set(value.keys()) == {
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'x',
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'y',
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'z',
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}, f'Invalid keys for entity of type {self.__class__}: "{value}"'
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value = [value[k] for k in ['x', 'y', 'z']] # type: ignore
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assert (
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isinstance(value, (list, tuple))
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and len(value) == 3 # type: ignore
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and all(isinstance(v, (int, float)) for v in value)
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), f'Invalid 3-axis value: {value}'
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super(ThreeAxisSensor, type(self)).value.fset(self, value) # type: ignore
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