59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
// For more tutorials: https://blog.learngoprogramming.com
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//
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// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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package main
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import (
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"strconv"
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"time"
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)
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type timestamp struct {
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time.Time
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}
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// implementation of the fmt.Stringer interface:
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func (ts timestamp) String() string {
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if ts.IsZero() {
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return "unknown"
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}
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// Mon Jan 2 15:04:05 -0700 MST 2006
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const layout = "2006/01"
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return ts.Format(layout)
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}
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// implementation of the json.Marshaler and json.Unmarshaler interfaces:
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// timestamp knows how to decode itself from json.
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// json.Unmarshal and json.Decode call this method.
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func (ts *timestamp) UnmarshalJSON(data []byte) error {
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*ts = toTimestamp(string(data))
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return nil
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}
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// timestamp knows how to encode itself to json.
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// json.Marshal and json.Encode call this method.
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func (ts timestamp) MarshalJSON() (data []byte, _ error) {
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return strconv.AppendInt(data, ts.Unix(), 10), nil
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}
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func toTimestamp(v interface{}) (ts timestamp) {
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var t int
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switch v := v.(type) {
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case int:
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t = v
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case string:
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t, _ = strconv.Atoi(v)
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}
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ts.Time = time.Unix(int64(t), 0)
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return ts
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}
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