Function getTimeRangeSlice

console/src/platform/billing/utils.ts:170–201

(
  dailyCosts: DailyCosts["daily"] | null,
  timeRangeFilter: number,
)

}

export function getTimeRangeSlice(
  dailyCosts: DailyCosts["daily"] | null,
  timeRangeFilter: number,
): DailyCosts["daily"] | null {
  if (dailyCosts === null || dailyCosts.length <= timeRangeFilter) {
    return dailyCosts;
  }
  const lastStartDate = parseISO(dailyCosts[dailyCosts.length - 1].startDate);
  // Determine the starting date for the time range (subtract one because
  // we're starting from the beginning of the last day).
  const firstStartDate = subDays(lastStartDate, timeRangeFilter - 1);
  let startOffset = -1 * timeRangeFilter;
  // Seed the list with the known-minimum number of records from the tail.
  const slices = dailyCosts.slice(startOffset);
  startOffset--;
  // ... then walk backwards from where we left off, prepending all records that
  // fall on or after the start of the time range. Since we're counting back
  // from the end of the Array, this is an inclusive guard (otherwise we'd omit
  // the last element when calling `.at(-n)`).
  while (Math.abs(startOffset) <= dailyCosts.length) {
    const slice = dailyCosts.at(startOffset);
    if (!slice) break;
    const sliceStart = parseISO(slice.startDate);
    if (firstStartDate.getTime() <= sliceStart.getTime()) {
      slices.unshift(slice);
    } else {
      break;
    }
    startOffset--;
  }
  return slices;
}

export function summarizeResourceCosts(
  dailyCosts: DailyCosts["daily"],