tempUtils.ts

Purpose

This module provides the two temperature utility functions used across all screens to convert and format core temperature values according to the user’s unit system preference.

Its responsibilities include:

• Converting Celsius values to Fahrenheit
• Formatting a Celsius temperature as a localized display string with the appropriate unit suffix

Invariants

Celsius-to-Fahrenheit Formula

°F = (°C × 9/5) + 32

No rounding is applied in celsiusToFahrenheit; rounding is the caller’s responsibility via decimals.

Default Decimal Places

formatTemp defaults to 1 decimal place.

Callers may pass a different decimals value; this is forwarded directly to toFixed.

Exports

celsiusToFahrenheit(...)

function celsiusToFahrenheit(c: number): number

Returns the Fahrenheit equivalent of the given Celsius value.

formatTemp(...)

function formatTemp(
	tempC: number,
	unitSystem: "metric" | "imperial",
	decimals?: number,
): string

Returns a display string for the given temperature:

• Imperial: "98.6°F" (Fahrenheit, rounded to decimals places)
• Metric: "37.0°C" (Celsius, rounded to decimals places)

Parameters