// Weather data formatting utilities
/**
* Format temperature in both Celsius and Fahrenheit
*/
export function formatTemperature(tempC: number): string {
const tempF = (tempC * 9) / 5 + 32
return `${tempF.toFixed(1)}°F (${tempC.toFixed(1)}°C)`
}
/**
* Convert wind speed from m/s to mph
*/
export function formatWindSpeed(windSpeedMs: number): string {
const windMph = (windSpeedMs * 2.237).toFixed(1)
return `${windMph} mph`
}
/**
* Convert pressure from hPa to inHg
*/
export function formatPressure(pressureHpa: number): string {
const pressureInHg = (pressureHpa * 0.02953).toFixed(2)
return `${pressureInHg} inHg`
}
/**
* Convert precipitation from mm to inches
*/
export function formatPrecipitation(mm: number): string {
const inches = (mm / 25.4).toFixed(2)
return `${inches} in`
}
/**
* Get wind direction as cardinal direction from degrees
*/
export function getWindDirection(degrees: number): string {
const directions = ["N", "NNE", "NE", "ENE", "E", "ESE", "SE", "SSE", "S", "SSW", "SW", "WSW", "W", "WNW", "NW", "NNW"]
const index = Math.round(degrees / 22.5) % 16
return directions[index]
}
/**
* Format date/time in a readable format
*/
export function formatLocalTime(timestamp: string): string {
const date = new Date(timestamp)
return date.toLocaleString("en-US", {
year: "numeric",
month: "short",
day: "numeric",
hour: "numeric",
minute: "2-digit",
hour12: true,
})
}
/**
* Format time ago from timestamp
*/
export function formatTimeAgo(timestamp: string): string {
const observationDate = new Date(timestamp)
const now = new Date()
const diffMs = now.getTime() - observationDate.getTime()
// Convert to minutes
const diffMinutes = Math.floor(diffMs / (1000 * 60))
if (diffMinutes < 1) {
return "just now"
} else if (diffMinutes < 60) {
return `${diffMinutes}m ago`
} else {
const hours = Math.floor(diffMinutes / 60)
const minutes = diffMinutes % 60
if (minutes === 0) {
return `${hours}h ago`
} else {
return `${hours}h ${minutes}m ago`
}
}
}
/**
* Get weather icon description from icon name
*/
export function getWeatherIconDescription(icon: string): string {
const iconMap: Record<string, string> = {
"clear-day": "Clear",
"clear-night": "Clear",
"partly-cloudy-day": "Partly Cloudy",
"partly-cloudy-night": "Partly Cloudy",
"cloudy": "Cloudy",
"fog": "Foggy",
"rain": "Rainy",
"sleet": "Sleet",
"snow": "Snowy",
"wind": "Windy",
"thunderstorm": "Thunderstorm",
}
return iconMap[icon] || "Unknown"
}
