Files
fuj-management/go/internal/domain/fees/fees.go
kacerrandClaude Opus 5.5 2d8aada8d6 feat(fees): adult rates for 2026-07 to 2026-12, default 600
- Default adult monthly rate 700 -> 600 CZK
- 2026-07 and 2026-08 set to 0; 2026-09 through 2026-12 added at 600
- Single-session fee is capped at the month's rate, so a 0-rate month
  is free for one session as well
- Mirrored in Go and legacy Python; new calculate_fee parity fixtures

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-08 11:53:18 +02:00

38 lines
1.3 KiB
Go

// Package fees ports fee calculation from legacy/scripts/attendance.py.
package fees
const (
AdultFeeDefault = 600 // CZK fallback for 2+ practices when month not in AdultFeeMonthlyRate
AdultFeeSingle = 200 // CZK for exactly 1 practice
)
// AdultFeeMonthlyRate mirrors ADULT_FEE_MONTHLY_RATE in legacy/scripts/attendance.py.
// Months absent from this map fall back to AdultFeeDefault.
var AdultFeeMonthlyRate = map[string]int{
"2025-09": 750, "2025-10": 750, "2025-11": 750, "2025-12": 750,
"2026-01": 750, "2026-02": 750, "2026-03": 350,
"2026-04": 700, "2026-05": 450, "2026-06": 600, "2026-07": 0, "2026-08": 0,
"2026-09": 600, "2026-10": 600, "2026-11": 600, "2026-12": 600,
}
// CalculateFee returns the adult fee in CZK for attendanceCount practices in
// the given monthKey (format "YYYY-MM").
//
// 0 practices → 0
// 1 practice → AdultFeeSingle (200), capped at the month's rate so a
// 0-rate month is free for everyone
// 2+ → AdultFeeMonthlyRate[monthKey] or AdultFeeDefault
func CalculateFee(attendanceCount int, monthKey string) int {
if attendanceCount == 0 {
return 0
}
rate, ok := AdultFeeMonthlyRate[monthKey]
if !ok {
rate = AdultFeeDefault
}
if attendanceCount == 1 {
return min(AdultFeeSingle, rate)
}
return rate
}