Function buildMonthlyEvolution

app/utils/chart-data-buckets.ts:76–104

(
  daily: DailyRawPoint[],
  rangeStartIso?: string,
  rangeEndIso?: string,
)

}

export function buildMonthlyEvolution(
  daily: DailyRawPoint[],
  rangeStartIso?: string,
  rangeEndIso?: string,
): MonthlyDataPoint[] {
  const sorted = sortedDaily(daily)
  const byMonth = new Map<string, number>()
  for (const item of sorted) {
    const m = item.day.slice(0, 7)
    byMonth.set(m, (byMonth.get(m) ?? 0) + item.value)
  }

  const entries = Array.from(byMonth.entries()).sort(([a], [b]) => a.localeCompare(b))

  return entries.map(([month, value], i) => {
    const [y, m] = month.split('-').map(Number) as [number, number]
    const total = daysInMonth(y, m - 1)
    const isFirst = i === 0
    const isLast = i === entries.length - 1

    const startDay = isFirst && rangeStartIso ? Number(rangeStartIso.split('-')[2]) : 1
    const endDay = isLast && rangeEndIso ? Number(rangeEndIso.split('-')[2]) : total
    const actualDays = endDay - startDay + 1

    if (actualDays < total) value = fillPartialBucket(value, actualDays, total)

    return { month, value, timestamp: parseIsoDate(`${month}-01`).getTime() }
  })
}

export function buildYearlyEvolution(
  daily: DailyRawPoint[],