Jan Novak
57ec817044
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Ports calculate_fee and calculate_junior_fee from scripts/attendance.py into a new go/internal/domain/fees package. Introduces the Expected type (Value int, Unknown bool) for the junior "?" sentinel, keeping the Go API strictly typed instead of mirroring Python's str|int return. All 20 table-driven tests pass with -race; golangci-lint clean. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
35 lines
1.0 KiB
Go
35 lines
1.0 KiB
Go
// Package fees ports fee calculation from scripts/attendance.py.
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package fees
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const (
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AdultFeeDefault = 700 // CZK fallback for 2+ practices when month not in AdultFeeMonthlyRate
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AdultFeeSingle = 200 // CZK for exactly 1 practice
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)
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// AdultFeeMonthlyRate mirrors ADULT_FEE_MONTHLY_RATE in scripts/attendance.py.
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// Months absent from this map fall back to AdultFeeDefault.
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var AdultFeeMonthlyRate = map[string]int{
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"2025-09": 750, "2025-10": 750, "2025-11": 750, "2025-12": 750,
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"2026-01": 750, "2026-02": 750, "2026-03": 350,
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"2026-04": 700, "2026-05": 700,
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}
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// CalculateFee returns the adult fee in CZK for attendanceCount practices in
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// the given monthKey (format "YYYY-MM").
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//
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// 0 practices → 0
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// 1 practice → AdultFeeSingle (200)
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// 2+ → AdultFeeMonthlyRate[monthKey] or AdultFeeDefault
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func CalculateFee(attendanceCount int, monthKey string) int {
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if attendanceCount == 0 {
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return 0
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}
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if attendanceCount == 1 {
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return AdultFeeSingle
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}
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if rate, ok := AdultFeeMonthlyRate[monthKey]; ok {
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return rate
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}
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return AdultFeeDefault
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}
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