Translated HTML templates for Go
See example directory for example(s).
package main
import (
"bytes"
"fmt"
"github.com/raspi/tulkki"
"golang.org/x/text/language"
"golang.org/x/text/message/catalog"
"html/template"
"time"
)
// Base template for all pages
var baseHTML = `
<html>
<head>
<title>{{.Title}}</title>
</head>
<body>
<main>
{{- template "content" .C -}}
</main>
</body>
</html>
`
// Example page
var testPageHTML = `
<p>
<!-- Translated within template itself: -->
{{T "test"}}
{{T "test_formatted" "Template" "right now"}}
<!-- Pre-translated to a template variable: -->
{{.TranslatedToken}}
</p>
`
// example base struct which all pages will use
type exampleBase struct {
Title string
// C (short for content) is used in the base HTML template as a per-page variables
// It needs to be abstract interface because different pages have different variables
C interface{}
}
// example page
type examplePage struct {
TranslatedToken string
}
func main() {
useLanguage := language.English
fallbackLanguage := language.English
pagetranslations := catalog.NewBuilder(
catalog.Fallback(fallbackLanguage),
)
// Translations are per-page for collision reasons
pagetranslations.SetString(language.English, `test`, `this is a test string`)
pagetranslations.SetString(language.English, `test_formatted`, `%s is testing things on %s`)
// Global template functions accessible to all pages
// Add CSRF etc generators here
funcs := template.FuncMap{}
tpl := tulkki.New(baseHTML, funcs)
tpl.AddPage(`testpage`, testPageHTML, pagetranslations)
// Generate a page template
page := exampleBase{
Title: "Hello, world!",
C: examplePage{
TranslatedToken: tpl.Translate(`testpage`, `test_formatted`, useLanguage, `Example`, time.Now().Truncate(time.Second)),
},
}
// Render the HTML
var tmp bytes.Buffer
err := tpl.Render(&tmp, `testpage`, useLanguage, page)
if err != nil {
panic(err)
}
fmt.Print(tmp.String())
fmt.Println(`example: ` + tpl.Translate(`testpage`, `test_formatted`, useLanguage, `Direct translation`, template.HTML(`<a href="#">here</a>`)))
}Outputs:
<html>
<head>
<title>Hello, world!</title>
</head>
<body>
<main>
<p>
this is a test string
Template is testing things on right now
Example is testing things on 2020-08-12 12:25:41 +0300 EEST
</p>
</main>
</body>
</html>
example: Direct translation is testing things on <a href="#">here</a>