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zk/internal/adapter/handlebars/helpers/date.go

102 lines
2.7 KiB
Go

package helpers
import (
"os"
"time"
"github.com/aymerick/raymond"
"github.com/lestrrat-go/strftime"
"github.com/zk-org/zk/internal/util"
dateutil "github.com/zk-org/zk/internal/util/date"
"github.com/pkg/errors"
"github.com/rvflash/elapsed"
)
// RegisterDate registers the {{date}} template helper to use the `naturaldate` package to generate time.Time based on language strings.
// This can be used in combination with the `format-date` helper to generate dates in the user's language.
// {{format-date (date "last week") "timestamp"}}
func RegisterDate(logger util.Logger) {
raymond.RegisterHelper("date", func(arg1 interface{}, arg2 interface{}) time.Time {
var t time.Time
switch date := arg1.(type) {
case string:
t, err := dateutil.TimeFromNatural(date)
if err != nil {
logger.Err(errors.Wrap(err, "the {{date}} template helper failed to parse the date"))
}
return t
case time.Time:
logger.Println("the {{date}} template helper was renamed to {{format-date}}, please update your configuration")
os.Exit(1)
return t
default:
logger.Println("the {{date}} template helper expects a natural human date as a string for its only argument")
return t
}
})
}
// RegisterFormatDate registers the {{format-date}} template helpers which format a given date.
//
// It supports various styles: short, medium, long, full, year, time,
// timestamp, timestamp-unix or a custom strftime format.
//
// {{format-date now}} -> 2009-11-17
// {{format-date now "medium"}} -> Nov 17, 2009
// {{format-date now "%Y-%m"}} -> 2009-11
func RegisterFormatDate(logger util.Logger) {
raymond.RegisterHelper("format-date", func(date time.Time, arg interface{}) string {
format := "%Y-%m-%d"
if arg, ok := arg.(string); ok {
format = findFormat(arg)
}
if format == "elapsed" {
return elapsed.Time(date)
} else {
res, err := strftime.Format(format, date, strftime.WithUnixSeconds('s'))
if err != nil {
logger.Printf("the {{format-date}} template helper failed to format the date: %v", err)
return ""
}
return res
}
})
}
var (
shortFormat = `%m/%d/%Y`
mediumFormat = `%b %d, %Y`
longFormat = `%B %d, %Y`
fullFormat = `%A, %B %d, %Y`
yearFormat = `%Y`
timeFormat = `%H:%M`
timestampFormat = `%Y%m%d%H%M`
timestampUnixFormat = `%s`
)
func findFormat(key string) string {
switch key {
case "short":
return shortFormat
case "medium":
return mediumFormat
case "long":
return longFormat
case "full":
return fullFormat
case "year":
return yearFormat
case "time":
return timeFormat
case "timestamp":
return timestampFormat
case "timestamp-unix":
return timestampUnixFormat
default:
return key
}
}