utils/template/template.go

package template

import (
	"bytes"
	"github.com/Masterminds/sprig/v3"
	"text/template"
)

type ParseTemplateOption func(tpl *template.Template)

func WithDelim(leftDelim string, rightDelim string) ParseTemplateOption {
	return func(tpl *template.Template) {
		tpl.Delims(leftDelim, rightDelim)
	}
}

func ParseTemplateStringToString(inputStr string, params any, opts ...ParseTemplateOption) (string, error) {
	tpl := template.New(inputStr)

	for _, opt := range opts {
		opt(tpl)
	}

	tpl.Funcs(sprig.FuncMap())
	tpl.Funcs(templateFuncMap)

	return parseTemplateStringToString(tpl, inputStr, params)
}

func parseTemplateStringToString(tpl *template.Template, inputStr string, params any) (string, error) {
	tpl, err := tpl.Parse(inputStr)
	if err != nil {
		return "", err
	}

	buffer := &bytes.Buffer{}
	err = tpl.Execute(buffer, params)
	if err != nil {
		return "", err
	}

	return buffer.String(), nil
}