package timerange
import (
"fmt"
"strings"
"time"
"github.com/Southclaws/opt"
)
type TimeRange struct {
Start opt.Optional[time.Time]
End opt.Optional[time.Time]
}
func parseTime(s string) (time.Time, error) {
t, err := time.Parse(time.DateOnly, s)
if err == nil {
return t, nil
}
return time.Parse(time.RFC3339, s)
}
func Parse(rangeStr string) (TimeRange, error) {
if rangeStr == "" {
return TimeRange{}, nil
}
parts := strings.Split(rangeStr, "/")
switch len(parts) {
case 1:
start, err := parseTime(parts[0])
if err != nil {
return TimeRange{}, err
}
return TimeRange{
Start: opt.New(start),
End: opt.NewEmpty[time.Time](),
}, nil
case 2:
if parts[0] == "" {
end, err := parseTime(parts[1])
if err != nil {
return TimeRange{}, err
}
return TimeRange{
Start: opt.NewEmpty[time.Time](),
End: opt.New(end),
}, nil
} else if parts[1] == "" {
start, err := parseTime(parts[0])
if err != nil {
return TimeRange{}, err
}
return TimeRange{
Start: opt.New(start),
End: opt.NewEmpty[time.Time](),
}, nil
} else {
start, err := parseTime(parts[0])
if err != nil {
return TimeRange{}, err
}
end, err := parseTime(parts[1])
if err != nil {
return TimeRange{}, err
}
return TimeRange{
Start: opt.New(start),
End: opt.New(end),
}, nil
}
default:
return TimeRange{}, fmt.Errorf("invalid time range format: expected 'start/end' or 'start/' or '/end' or 'start', got %q", rangeStr)
}
}
