75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
// Copyright 2013 Prometheus Team
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package utility
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import (
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"fmt"
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"regexp"
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"strconv"
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"time"
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)
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var durationRE = regexp.MustCompile("^([0-9]+)([ywdhms]+)$")
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func DurationToString(duration time.Duration) string {
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seconds := int64(duration / time.Second)
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factors := map[string]int64{
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"y": 60 * 60 * 24 * 365,
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"d": 60 * 60 * 24,
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"h": 60 * 60,
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"m": 60,
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"s": 1,
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}
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unit := "s"
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switch int64(0) {
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case seconds % factors["y"]:
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unit = "y"
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case seconds % factors["d"]:
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unit = "d"
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case seconds % factors["h"]:
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unit = "h"
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case seconds % factors["m"]:
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unit = "m"
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}
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return fmt.Sprintf("%v%v", seconds/factors[unit], unit)
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}
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func StringToDuration(durationStr string) (duration time.Duration, err error) {
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matches := durationRE.FindStringSubmatch(durationStr)
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if len(matches) != 3 {
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err = fmt.Errorf("Not a valid duration string: '%v'", durationStr)
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return
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}
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durationSeconds, _ := strconv.Atoi(matches[1])
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duration = time.Duration(durationSeconds) * time.Second
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unit := matches[2]
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switch unit {
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case "y":
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duration *= 60 * 60 * 24 * 365
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case "w":
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duration *= 60 * 60 * 24 * 7
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case "d":
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duration *= 60 * 60 * 24
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case "h":
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duration *= 60 * 60
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case "m":
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duration *= 60
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case "s":
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duration *= 1
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default:
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panic("Invalid time unit in duration string.")
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}
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return
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}
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