Function formatRelativeTime

src/utils/format.ts:144–184

(
  date: Date,
  options: RelativeTimeOptions & { now?: Date } = {},
)

}

export function formatRelativeTime(
  date: Date,
  options: RelativeTimeOptions & { now?: Date } = {},
): string {
  const { style = 'narrow', numeric = 'always', now = new Date() } = options
  const diffInMs = date.getTime() - now.getTime()
  // Use Math.trunc to truncate towards zero for both positive and negative values
  const diffInSeconds = Math.trunc(diffInMs / 1000)

  // Define time intervals with custom short units
  const intervals = [
    { unit: 'year', seconds: 31536000, shortUnit: 'y' },
    { unit: 'month', seconds: 2592000, shortUnit: 'mo' },
    { unit: 'week', seconds: 604800, shortUnit: 'w' },
    { unit: 'day', seconds: 86400, shortUnit: 'd' },
    { unit: 'hour', seconds: 3600, shortUnit: 'h' },
    { unit: 'minute', seconds: 60, shortUnit: 'm' },
    { unit: 'second', seconds: 1, shortUnit: 's' },
  ] as const

  // Find the appropriate unit
  for (const { unit, seconds: intervalSeconds, shortUnit } of intervals) {
    if (Math.abs(diffInSeconds) >= intervalSeconds) {
      const value = Math.trunc(diffInSeconds / intervalSeconds)
      // For short style, use custom format
      if (style === 'narrow') {
        return diffInSeconds < 0
          ? `${Math.abs(value)}${shortUnit} ago`
          : `in ${value}${shortUnit}`
      }
      // For days and longer, use long style regardless of the style parameter
      return getRelativeTimeFormat('long', numeric).format(value, unit)
    }
  }

  // For values less than 1 second
  if (style === 'narrow') {
    return diffInSeconds <= 0 ? '0s ago' : 'in 0s'
  }
  return getRelativeTimeFormat(style, numeric).format(0, 'second')
}

export function formatRelativeTimeAgo(
  date: Date,