...
// FormattedLastSeen func
func (u *User) FormattedLastSeen() string {
return u.LastSeen.Format("2006-01-02 15:04:05")
}
...
...
<p>Last seen on: {{ .ProfileUser.FormattedLastSeen }}</p>
...
Notice: 虽然我也比较喜欢其他语言的 %Y-%m-%d %H:%M:%S" layout 形式，但是无奈 Go 就是 "2006-01-02 15:04:05" 这样的layout，没有道理可讲，我有时候甚至怕它搞错 01 和 02 哪个是月 哪个表示 日
...
const (
minute = 1
hour = minute * 60
day = hour * 24
month = day * 30
year = day * 365
quarter = year / 4
)
// FromDuration returns a friendly string representing an approximation of the
// given duration
func FromDuration(d time.Duration) string {
seconds := round(d.Seconds())
if seconds < 30 {
return "less than a minute"
}
if seconds < 90 {
return "1 minute"
}
minutes := div(seconds, 60)
if minutes < 45 {
return fmt.Sprintf("%0d minutes", minutes)
}
hours := div(minutes, 60)
if minutes < day {
return fmt.Sprintf("about %s", pluralize(hours, "hour"))
}
if minutes < (42 * hour) {
return "1 day"
}
days := div(hours, 24)
if minutes < (30 * day) {
return pluralize(days, "day")
}
months := div(days, 30)
if minutes < (45 * day) {
return "about 1 month"
}
if minutes < (60 * day) {
return "about 2 months"
}
if minutes < year {
return pluralize(months, "month")
}
rem := minutes % year
years := minutes / year
if rem < (3 * month) {
return fmt.Sprintf("about %s", pluralize(years, "year"))
}
if rem < (9 * month) {
return fmt.Sprintf("over %s", pluralize(years, "year"))
}
years++
return fmt.Sprintf("almost %s", pluralize(years, "year"))
}
// FromTime returns a friendly string representing the approximate difference
// from the given time and time.Now()
func FromTime(t time.Time) string {
now := time.Now()
var d time.Duration
var suffix string
if t.Before(now) {
d = now.Sub(t)
suffix = "ago"
} else {
d = t.Sub(now)
suffix = "from now"
}
return fmt.Sprintf("%s %s", FromDuration(d), suffix)
}
func pluralize(i int, s string) string {
var buf bytes.Buffer
buf.WriteString(fmt.Sprintf("%d %s", i, s))
if i != 1 {
buf.WriteString("s")
}
return buf.String()
}
func round(f float64) int {
return int(math.Floor(f + .50))
}
func div(numerator int, denominator int) int {
rem := numerator % denominator
result := numerator / denominator
if rem >= (denominator / 2) {
result++
}
return result
}
...
// FormattedTimeAgo func
func (p *Post) FormattedTimeAgo() string {
return FromTime(*p.Timestamp)
}
...
...
{{range .Posts}}
<table class="table table-hover">
<tr valign="top">
<td width="36px"><img src="{{.User.Avatar}}&s=36"></td>
<td><a href="/user/{{.User.Username}}">{{ .User.Username }}</a> said {{.FormattedTimeAgo}}:<br>{{ .Body }}</td>
</tr>
</table>
{{end}}
...
本小节 Diff
写在最后: 突然发现模板可以使用 类的 Function, 所以前面 User 的 Avatar 字段貌似就没有那么必要了，直接用个function来实现，而且好处是不用去关心更改邮箱后的 SetAvatar,不过我任性，就不改了，我也是才发现 Go 模板还有这个妙用的
