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Simplify distance conversion (#43107)

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springstan 2020-11-11 20:10:17 +01:00 committed by GitHub
parent 434d39a5ea
commit 37bcfd1d2f
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1 changed files with 25 additions and 104 deletions
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129
homeassistant/util/distance.py
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@ -1,5 +1,6 @@
"""Distance util functions."""
from numbers import Number
from typing import Callable, Dict
from homeassistant.const import (
LENGTH,
@ -25,6 +26,28 @@ VALID_UNITS = [
LENGTH_YARD,
]
TO_METERS: Dict[str, Callable[[float], float]] = {
LENGTH_METERS: lambda meters: meters,
LENGTH_MILES: lambda miles: miles * 1609.344,
LENGTH_YARD: lambda yards: yards * 0.9144,
LENGTH_FEET: lambda feet: feet * 0.3048,
LENGTH_INCHES: lambda inches: inches * 0.0254,
LENGTH_KILOMETERS: lambda kilometers: kilometers * 1000,
LENGTH_CENTIMETERS: lambda centimeters: centimeters * 0.01,
LENGTH_MILLIMETERS: lambda millimeters: millimeters * 0.001,
}
METERS_TO: Dict[str, Callable[[float], float]] = {
LENGTH_METERS: lambda meters: meters,
LENGTH_MILES: lambda meters: meters * 0.000621371,
LENGTH_YARD: lambda meters: meters * 1.09361,
LENGTH_FEET: lambda meters: meters * 3.28084,
LENGTH_INCHES: lambda meters: meters * 39.3701,
LENGTH_KILOMETERS: lambda meters: meters * 0.001,
LENGTH_CENTIMETERS: lambda meters: meters * 100,
LENGTH_MILLIMETERS: lambda meters: meters * 1000,
}
def convert(value: float, unit_1: str, unit_2: str) -> float:
"""Convert one unit of measurement to another."""
@ -39,108 +62,6 @@ def convert(value: float, unit_1: str, unit_2: str) -> float:
if unit_1 == unit_2 or unit_1 not in VALID_UNITS:
return value
meters: float = value
meters: float = TO_METERS[unit_1](value)
if unit_1 == LENGTH_MILES:
meters = __miles_to_meters(value)
elif unit_1 == LENGTH_YARD:
meters = __yards_to_meters(value)
elif unit_1 == LENGTH_FEET:
meters = __feet_to_meters(value)
elif unit_1 == LENGTH_INCHES:
meters = __inches_to_meters(value)
elif unit_1 == LENGTH_KILOMETERS:
meters = __kilometers_to_meters(value)
elif unit_1 == LENGTH_CENTIMETERS:
meters = __centimeters_to_meters(value)
elif unit_1 == LENGTH_MILLIMETERS:
meters = __millimeters_to_meters(value)
result = meters
if unit_2 == LENGTH_MILES:
result = __meters_to_miles(meters)
elif unit_2 == LENGTH_YARD:
result = __meters_to_yards(meters)
elif unit_2 == LENGTH_FEET:
result = __meters_to_feet(meters)
elif unit_2 == LENGTH_INCHES:
result = __meters_to_inches(meters)
elif unit_2 == LENGTH_KILOMETERS:
result = __meters_to_kilometers(meters)
elif unit_2 == LENGTH_CENTIMETERS:
result = __meters_to_centimeters(meters)
elif unit_2 == LENGTH_MILLIMETERS:
result = __meters_to_millimeters(meters)
return result
def __miles_to_meters(miles: float) -> float:
"""Convert miles to meters."""
return miles * 1609.344
def __yards_to_meters(yards: float) -> float:
"""Convert yards to meters."""
return yards * 0.9144
def __feet_to_meters(feet: float) -> float:
"""Convert feet to meters."""
return feet * 0.3048
def __inches_to_meters(inches: float) -> float:
"""Convert inches to meters."""
return inches * 0.0254
def __kilometers_to_meters(kilometers: float) -> float:
"""Convert kilometers to meters."""
return kilometers * 1000
def __centimeters_to_meters(centimeters: float) -> float:
"""Convert centimeters to meters."""
return centimeters * 0.01
def __millimeters_to_meters(millimeters: float) -> float:
"""Convert millimeters to meters."""
return millimeters * 0.001
def __meters_to_miles(meters: float) -> float:
"""Convert meters to miles."""
return meters * 0.000621371
def __meters_to_yards(meters: float) -> float:
"""Convert meters to yards."""
return meters * 1.09361
def __meters_to_feet(meters: float) -> float:
"""Convert meters to feet."""
return meters * 3.28084
def __meters_to_inches(meters: float) -> float:
"""Convert meters to inches."""
return meters * 39.3701
def __meters_to_kilometers(meters: float) -> float:
"""Convert meters to kilometers."""
return meters * 0.001
def __meters_to_centimeters(meters: float) -> float:
"""Convert meters to centimeters."""
return meters * 100
def __meters_to_millimeters(meters: float) -> float:
"""Convert meters to millimeters."""
return meters * 1000
return METERS_TO[unit_2](meters)