core/util/template/html.go

package template

import (
	"html/template"
	"io/ioutil"
)

func LoadHTMLTemplate(filename string, funcMap ...template.FuncMap) (*template.Template, error) {
	var (
		tpl *template.Template
		err error
	)
	content, err := ioutil.ReadFile(filename)
	if err != nil {
		return nil, err
	}
	if len(funcMap) > 0 {
		tpl, err = template.New(filename).Funcs(funcMap[0]).Parse(string(content))
		if err != nil {
			return nil, err
		}
	} else {
		tpl, err = template.New(filename).Parse(string(content))
		if err != nil {
			return nil, err
		}
	}
	return tpl, nil
}