feat: unify income payment cards and drop period comparisons (WealthLedger/main#33) (#83)

feat: unify income payment cards and drop period comparisons (WealthLedger/main#33)

src/modules/investments/income/income-period.ts

@@ -14,45 +14,28 @@ const MONDAY_WEEKDAY_INDEX = 1;
 const INCLUSIVE_DAY_OFFSET = 1;
 const NEXT_DAY_OFFSET = 1;
 const PREVIOUS_MONTH_LAST_DAY = 0;
-const PREVIOUS_DAY_OFFSET = -1;
-const PREVIOUS_YEAR_OFFSET = 1;
-const DATE_COMPONENT_DIGITS = 2;
 
 const DAILY_BUCKET_MAX_DAYS = 45;
 const WEEKLY_BUCKET_MAX_DAYS = 180;
 const DAYS_PER_WEEK = 7;
 const ISO_MONTH_LENGTH = 7;
-const ISO_YEAR_LENGTH = 4;
 
 export type IncomeBucketGranularity = 'day' | 'month' | 'week';
 
 export function planIncomePeriod(
   from: string | undefined,
   to: string | undefined,
-  openedDate?: Date,
 ): {
   granularity: IncomeBucketGranularity;
-  previous: DateOnlyRange;
   selected: DateOnlyRange;
-  yearAgo: DateOnlyRange | null;
 } {
   if (Boolean(from) !== Boolean(to)) throw invalidPeriod();
   const today = moscowDate(new Date());
   const selected =
     from && to ? { from, to } : { from: firstOfMonth(today), to: today };
   assertRange(selected, today);
-  const previous = isFullMonth(selected)
-    ? previousMonth(selected.from)
-    : shiftDays(selected, -rangeDays(selected));
-  const candidate = yearAgo(selected);
-  const yearAgoRange =
-    candidate && (!openedDate || candidate.from >= moscowDate(openedDate))
-      ? candidate
-      : null;
   return {
     selected,
-    previous,
-    yearAgo: yearAgoRange,
     granularity:
       rangeDays(selected) <= DAILY_BUCKET_MAX_DAYS
         ? 'day'
@@ -136,34 +119,6 @@ function endOfMonth(value: string): string {
   return new Date(Date.UTC(year, month, PREVIOUS_MONTH_LAST_DAY)).toISOString().slice(ISO_DATE_START, ISO_DATE_LENGTH);
 }
 
-function isFullMonth(range: DateOnlyRange): boolean {
-  return (
-    range.from === firstOfMonth(range.from) && range.to === endOfMonth(range.to)
-  );
-}
-
-function previousMonth(from: string): DateOnlyRange {
-  const last = addDays(firstOfMonth(from), PREVIOUS_DAY_OFFSET);
-  return { from: firstOfMonth(last), to: last };
-}
-
-function shiftDays(range: DateOnlyRange, days: number): DateOnlyRange {
-  return { from: addDays(range.from, days), to: addDays(range.to, days) };
-}
-
-function yearAgo(range: DateOnlyRange): DateOnlyRange | null {
-  const shift = (value: string) => {
-    const [year, month, day] = dateParts(value);
-    const result = `${String(year - PREVIOUS_YEAR_OFFSET).padStart(ISO_YEAR_LENGTH, '0')}-${String(month).padStart(DATE_COMPONENT_DIGITS, '0')}-${String(day).padStart(DATE_COMPONENT_DIGITS, '0')}`;
-    return utcDate(result).toISOString().slice(ISO_DATE_START, ISO_DATE_LENGTH) === result
-      ? result
-      : null;
-  };
-  const from = shift(range.from);
-  const to = shift(range.to);
-  return from && to ? { from, to } : null;
-}
-
 function invalidPeriod(): BadRequestException {
   return new BadRequestException({ code: IncomeErrorCode.InvalidPeriod });
 }