github.com/m3db/m3@v1.5.0/src/x/convert/unit.go

// Copyright (c) 2018 Uber Technologies, Inc.
//
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// of this software and associated documentation files (the "Software"), to deal
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// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
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// THE SOFTWARE.

package convert

import xtime "github.com/m3db/m3/src/x/time"

// UnitForM3DB converts a time unit into one that is suitable for m3db.
// The is done in an explicit way for better performance and the logic is
// ensured though unit test.
func UnitForM3DB(unit xtime.Unit) xtime.Unit {
	switch unit {
	case xtime.Second, xtime.Minute, xtime.Hour, xtime.Day, xtime.Year:
		return xtime.Second
	case xtime.Nanosecond, xtime.Millisecond, xtime.Microsecond:
		return unit
	default:
		return xtime.Nanosecond
	}
}