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>
38 lines
1.2 KiB
Go
38 lines
1.2 KiB
Go
package fees
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const JuniorFeeDefault = 500 // CZK fallback for 2+ practices when month not in JuniorFeeMonthlyRate
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// JuniorFeeMonthlyRate mirrors JUNIOR_MONTHLY_RATE in scripts/attendance.py.
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// Months absent from this map fall back to JuniorFeeDefault.
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var JuniorFeeMonthlyRate = map[string]int{
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"2025-09": 250,
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"2026-03": 250,
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}
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// Expected is the result of a junior fee calculation.
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// When Unknown is true the fee requires manual review (Python returns "?");
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// in that case Value is meaningless — always check Unknown first.
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type Expected struct {
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Value int
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Unknown bool
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}
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// CalculateJuniorFee returns the junior fee for attendanceCount practices in
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// the given monthKey (format "YYYY-MM").
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//
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// 0 practices → Expected{Value: 0}
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// 1 practice → Expected{Unknown: true} (manual review; Python sentinel "?")
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// 2+ → Expected{Value: JuniorFeeMonthlyRate[monthKey] or JuniorFeeDefault}
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func CalculateJuniorFee(attendanceCount int, monthKey string) Expected {
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if attendanceCount == 0 {
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return Expected{Value: 0}
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}
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if attendanceCount == 1 {
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return Expected{Unknown: true}
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}
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if rate, ok := JuniorFeeMonthlyRate[monthKey]; ok {
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return Expected{Value: rate}
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}
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return Expected{Value: JuniorFeeDefault}
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}
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