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package template
import (
"fmt"
"html/template"
"strconv"
"strings"
"github.com/Necoro/feed2imap-go/internal/log"
)
func dict(v ...string) map[string]string {
dict := map[string]string{}
lenv := len(v)
for i := 0; i < lenv; i += 2 {
key := v[i]
if i+1 >= lenv {
dict[key] = ""
continue
}
dict[key] = v[i+1]
}
return dict
}
func join(sep string, parts []string) string {
return strings.Join(parts, sep)
}
func lastUrlPart(url string) string {
split := strings.Split(url, "/")
return split[len(split)-1]
}
func byteCount(str string) string {
b, err := strconv.ParseUint(str, 10, 64)
if err != nil {
log.Printf("Cannot convert '%s' to byte count: %s", str, err)
}
const unit = 1024
if b < unit {
return fmt.Sprintf("%d B", b)
}
div, exp := uint64(unit), 0
for n := b / unit; n >= unit; n /= unit {
div *= unit
exp++
}
return fmt.Sprintf("%.1f %cB", float64(b)/float64(div), "KMGTPE"[exp])
}
func html(s string) template.HTML {
return template.HTML(s)
}
var funcMap = template.FuncMap{
"dict": dict,
"join": join,
"lastUrlPart": lastUrlPart,
"byteCount": byteCount,
"html": html,
}
func fromString(name, templateStr string) *template.Template {
tpl := template.New(name).Funcs(funcMap)
return template.Must(tpl.Parse(templateStr))
}
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