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64 lines
1.8 KiB
Go
64 lines
1.8 KiB
Go
package provisioner
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import (
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"encoding/json"
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"time"
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"github.com/pkg/errors"
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)
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// Duration is a wrapper around Time.Duration to aid with marshal/unmarshal.
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type Duration struct {
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time.Duration
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}
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// NewDuration parses a duration string and returns a Duration type or an error
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// if the given string is not a duration.
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func NewDuration(s string) (*Duration, error) {
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d, err := time.ParseDuration(s)
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if err != nil {
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return nil, errors.Wrapf(err, "error parsing %s as duration", s)
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}
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return &Duration{Duration: d}, nil
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}
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// MarshalJSON parses a duration string and sets it to the duration.
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//
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// A duration string is a possibly signed sequence of decimal numbers, each with
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// optional fraction and a unit suffix, such as "300ms", "-1.5h" or "2h45m".
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// Valid time units are "ns", "us" (or "µs"), "ms", "s", "m", "h".
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func (d *Duration) MarshalJSON() ([]byte, error) {
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return json.Marshal(d.Duration.String())
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}
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// UnmarshalJSON parses a duration string and sets it to the duration.
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//
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// A duration string is a possibly signed sequence of decimal numbers, each with
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// optional fraction and a unit suffix, such as "300ms", "-1.5h" or "2h45m".
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// Valid time units are "ns", "us" (or "µs"), "ms", "s", "m", "h".
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func (d *Duration) UnmarshalJSON(data []byte) (err error) {
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var (
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s string
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dd time.Duration
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)
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if d == nil {
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return errors.New("duration cannot be nil")
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}
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if err = json.Unmarshal(data, &s); err != nil {
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return errors.Wrapf(err, "error unmarshaling %s", data)
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}
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if dd, err = time.ParseDuration(s); err != nil {
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return errors.Wrapf(err, "error parsing %s as duration", s)
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}
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d.Duration = dd
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return
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}
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// Value returns 0 if the duration is null, the inner duration otherwise.
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func (d *Duration) Value() time.Duration {
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if d == nil {
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return 0
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}
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return d.Duration
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}
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