52 lines
990 B
Go
52 lines
990 B
Go
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// 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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// Mon Jan 2 15:04:05 -0700 MST 2006
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const layout = "2006/01"
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// unknown is the zero value of a timestamp.
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var unknown = timestamp(time.Time{})
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// Timestamp prints timestamps, it's a stringer.
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// Timestamp is useful even if it's zero.
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type timestamp time.Time
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// String makes the timestamp a stringer.
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func (ts timestamp) String() string {
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t := time.Time(ts)
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if t.IsZero() {
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return "unknown"
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}
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return t.Format(layout)
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}
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// toTimestamp was "book.format" before.
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// Now it returns a timestamp value depending on the type of `v`.
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func toTimestamp(v interface{}) 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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default:
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return unknown
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}
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return timestamp(time.Unix(int64(t), 0))
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}
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