hugo/tpl/time/time.go

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// Copyright 2017 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package time provides template functions for measuring and displaying time.
package time
import (
"fmt"
"time"
_time "time"
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"github.com/gohugoio/hugo/common/htime"
"github.com/spf13/cast"
)
// New returns a new instance of the time-namespaced template functions.
func New(timeFormatter htime.TimeFormatter, location *time.Location) *Namespace {
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return &Namespace{
timeFormatter: timeFormatter,
location: location,
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}
}
// Namespace provides template functions for the "time" namespace.
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type Namespace struct {
timeFormatter htime.TimeFormatter
location *time.Location
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}
// AsTime converts the textual representation of the datetime string into
// a time.Time interface.
func (ns *Namespace) AsTime(v any, args ...any) (any, error) {
loc := ns.location
if len(args) > 0 {
locStr, err := cast.ToStringE(args[0])
if err != nil {
return nil, err
}
loc, err = _time.LoadLocation(locStr)
if err != nil {
return nil, err
}
}
return htime.ToTimeInDefaultLocationE(v, loc)
}
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// Format converts the textual representation of the datetime string in v into
// time.Time if needed and formats it with the given layout.
func (ns *Namespace) Format(layout string, v any) (string, error) {
t, err := htime.ToTimeInDefaultLocationE(v, ns.location)
if err != nil {
return "", err
}
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return ns.timeFormatter.Format(t, layout), nil
}
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// Now returns the current local time or `clock` time
func (ns *Namespace) Now() _time.Time {
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return htime.Now()
}
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// ParseDuration parses the duration string s.
// A duration string is a possibly signed sequence of
// decimal numbers, each with optional fraction and a unit suffix,
// such as "300ms", "-1.5h" or "2h45m".
// Valid time units are "ns", "us" (or "µs"), "ms", "s", "m", "h".
// See https://golang.org/pkg/time/#ParseDuration
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func (ns *Namespace) ParseDuration(s any) (_time.Duration, error) {
ss, err := cast.ToStringE(s)
if err != nil {
return 0, err
}
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return _time.ParseDuration(ss)
}
var durationUnits = map[string]_time.Duration{
"nanosecond": _time.Nanosecond,
"ns": _time.Nanosecond,
"microsecond": _time.Microsecond,
"us": _time.Microsecond,
"µs": _time.Microsecond,
"millisecond": _time.Millisecond,
"ms": _time.Millisecond,
"second": _time.Second,
"s": _time.Second,
"minute": _time.Minute,
"m": _time.Minute,
"hour": _time.Hour,
"h": _time.Hour,
}
// Duration converts the given number to a time.Duration.
// Unit is one of nanosecond/ns, microsecond/us/µs, millisecond/ms, second/s, minute/m or hour/h.
func (ns *Namespace) Duration(unit any, number any) (_time.Duration, error) {
unitStr, err := cast.ToStringE(unit)
if err != nil {
return 0, err
}
unitDuration, found := durationUnits[unitStr]
if !found {
return 0, fmt.Errorf("%q is not a valid duration unit", unit)
}
n, err := cast.ToInt64E(number)
if err != nil {
return 0, err
}
return _time.Duration(n) * unitDuration, nil
}