1package main
 2
 3import (
 4	html "html/template"
 5	"io"
 6	"os"
 7	text "text/template"
 8)
 9
10type Templater interface {
11	Execute(wr io.Writer, data any) error
12}
13
14var (
15	templateFunc = map[string]any{
16		"DerefI": func(i *int) int { return *i },
17		"DerefS": func(i *string) string { return *i },
18	}
19)
20
21func GetTemplate(templateType, filePath string) (Templater, error) {
22	file, err := os.Open(filePath)
23	if err != nil {
24		return nil, err
25	}
26
27	tmpl, err := io.ReadAll(file)
28	if err != nil {
29		return nil, err
30	}
31
32	switch templateType {
33	case "text":
34		return text.New("text").
35			Funcs(templateFunc).
36			Parse(string(tmpl))
37	case "html":
38		return html.New("html").
39			Funcs(templateFunc).
40			Parse(string(tmpl))
41	default:
42		panic("Invalid template-type")
43	}
44}