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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"
"github.com/gohugoio/hugo/common/hreflect"
"github.com/gohugoio/hugo/common/htime"
"github.com/gohugoio/locales"
"github.com/spf13/cast"
)
// New returns a new instance of the time-namespaced template functions.
func New(translator locales.Translator, location *time.Location) *Namespace {
return &Namespace{
timeFormatter: htime.NewTimeFormatter(translator),
location: location,
}
}
// Namespace provides template functions for the "time" namespace.
type Namespace struct {
timeFormatter htime.TimeFormatter
location *time.Location
}
// AsTime converts the textual representation of the datetime string into
// a time.Time interface.
func (ns *Namespace) AsTime(v interface{}, args ...interface{}) (interface{}, error) {
if !hreflect.IsTruthful(v) {
return time.Time{}, nil
}
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)
}
// Format converts the textual representation of the datetime string into
// the other form or returns it of the time.Time value. These are formatted
// with the layout string
func (ns *Namespace) Format(layout string, v interface{}) (string, error) {
t, err := cast.ToTimeE(v)
if err != nil {
return "", err
}
return ns.timeFormatter.Format(t, layout), nil
}
// Now returns the current local time.
func (ns *Namespace) Now() _time.Time {
return _time.Now()
}
// ParseDuration parses a duration string.
// 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
func (ns *Namespace) ParseDuration(in interface{}) (_time.Duration, error) {
s, err := cast.ToStringE(in)
if err != nil {
return 0, err
}
return _time.ParseDuration(s)
}
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 interface{}, number interface{}) (_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
}
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