package service

import (
	"encoding/json"
	"fmt"
	"time"
)

func mustJSON(v any) json.RawMessage {
	b, err := json.Marshal(v)
	if err != nil {
		return json.RawMessage(`{}`)
	}
	return b
}

// ISOWeek returns the ISO-8601 week key like "2026-W37".
func ISOWeek(t time.Time) string {
	year, week := t.ISOWeek()
	return fmt.Sprintf("%d-W%02d", year, week)
}