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ferret/pkg/stdlib/datetime/dayofweek.go
2018-10-31 19:26:36 -04:00

29 lines
682 B
Go

package datetime
import (
"context"
"github.com/MontFerret/ferret/pkg/runtime/values"
"github.com/MontFerret/ferret/pkg/runtime/core"
)
// DateDayOfWeek returns number of the weekday from the date. Sunday is the 0th day of week.
// @params date (DateTime) - source DateTime.
// @return (Int) - return number of the weekday.
func DateDayOfWeek(_ context.Context, args ...core.Value) (core.Value, error) {
err := core.ValidateArgs(args, 1, 1)
if err != nil {
return values.None, err
}
err = core.ValidateType(args[0], core.DateTimeType)
if err != nil {
return values.None, err
}
wday := args[0].(values.DateTime).Weekday()
return values.NewInt(int(wday)), nil
}