refactor(api): extract vacation chargeability helpers

2026-03-31 11:08:58 +02:00
parent 3e0d9d9af7
commit 656c3d0ee5
3 changed files with 219 additions and 156 deletions
@@ -0,0 +1,84 @@
+import { TRPCError } from "@trpc/server";
+import { countCalendarDaysInPeriod } from "../lib/vacation-day-count.js";
+import {
+  VACATION_BALANCE_TYPES,
+  buildVacationDeductionSnapshotWriteData,
+  calculateVacationDeductionSnapshot,
+  type VacationChargeableInput,
+} from "../lib/vacation-deduction-snapshot.js";
+import type { TRPCContext } from "../trpc.js";
+
+type VacationDb = TRPCContext["db"];
+type VacationDeductionWriteData = ReturnType<typeof buildVacationDeductionSnapshotWriteData>;
+
+export async function calculateVacationEffectiveDays(
+  db: VacationDb,
+  vacation: VacationChargeableInput,
+): Promise<number> {
+  if (!VACATION_BALANCE_TYPES.has(vacation.type)) {
+    return countCalendarDaysInPeriod(vacation);
+  }
+
+  const snapshot = await calculateVacationDeductionSnapshot(db, vacation);
+  return snapshot.deductedDays;
+}
+
+export async function assertVacationStillChargeable(
+  db: VacationDb,
+  vacation: VacationChargeableInput,
+): Promise<void> {
+  if (!VACATION_BALANCE_TYPES.has(vacation.type)) {
+    return;
+  }
+
+  const effectiveDays = await calculateVacationEffectiveDays(db, vacation);
+  if (effectiveDays <= 0) {
+    throw new TRPCError({
+      code: "BAD_REQUEST",
+      message: "Vacation no longer deducts any vacation days for the current holiday calendar and cannot be approved",
+    });
+  }
+}
+
+export async function resolveVacationCreationChargeability(
+  db: VacationDb,
+  vacation: VacationChargeableInput,
+): Promise<{
+  effectiveDays: number | null;
+  deductionSnapshotWriteData: VacationDeductionWriteData | null;
+}> {
+  if (!VACATION_BALANCE_TYPES.has(vacation.type)) {
+    return {
+      effectiveDays: null,
+      deductionSnapshotWriteData: null,
+    };
+  }
+
+  const deductionSnapshot = await calculateVacationDeductionSnapshot(db, vacation);
+  const effectiveDays = deductionSnapshot.deductedDays;
+
+  if (effectiveDays <= 0) {
+    throw new TRPCError({
+      code: "BAD_REQUEST",
+      message: "Selected vacation period only contains public holidays and does not deduct any vacation days",
+    });
+  }
+
+  return {
+    effectiveDays,
+    deductionSnapshotWriteData: buildVacationDeductionSnapshotWriteData(deductionSnapshot),
+  };
+}
+
+export async function buildVacationApprovalWriteData(
+  db: VacationDb,
+  vacation: VacationChargeableInput,
+): Promise<VacationDeductionWriteData | { deductedDays: 0 }> {
+  if (!VACATION_BALANCE_TYPES.has(vacation.type)) {
+    return { deductedDays: 0 };
+  }
+
+  return buildVacationDeductionSnapshotWriteData(
+    await calculateVacationDeductionSnapshot(db, vacation),
+  );
+}