58 lines
1.9 KiB
Go
58 lines
1.9 KiB
Go
// Vikunja is a to-do list application to facilitate your life.
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// Copyright 2018-present Vikunja and contributors. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public Licensee as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public Licensee for more details.
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//
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// You should have received a copy of the GNU Affero General Public Licensee
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package utils
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import (
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"regexp"
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"strconv"
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"time"
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)
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// ParseISO8601Duration converts a ISO8601 duration into a time.Duration
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func ParseISO8601Duration(str string) time.Duration {
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matches := durationRegex.FindStringSubmatch(str)
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if len(matches) == 0 {
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return 0
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}
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years := parseDurationPart(matches[2], time.Hour*24*365)
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months := parseDurationPart(matches[3], time.Hour*24*30)
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days := parseDurationPart(matches[4], time.Hour*24)
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hours := parseDurationPart(matches[5], time.Hour)
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minutes := parseDurationPart(matches[6], time.Second*60)
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seconds := parseDurationPart(matches[7], time.Second)
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duration := years + months + days + hours + minutes + seconds
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if matches[1] == "-" {
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return -duration
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}
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return duration
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}
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var durationRegex = regexp.MustCompile(`([-+])?P([\d\.]+Y)?([\d\.]+M)?([\d\.]+D)?T?([\d\.]+H)?([\d\.]+M)?([\d\.]+?S)?`)
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func parseDurationPart(value string, unit time.Duration) time.Duration {
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if len(value) != 0 {
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if parsed, err := strconv.ParseFloat(value[:len(value)-1], 64); err == nil {
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return time.Duration(float64(unit) * parsed)
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}
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}
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return 0
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}
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