feat: translation support

See #483

pkg/i18n/i18n.go

@@ -0,0 +1,62 @@
+package i18n
+
+import (
+	"embed"
+	"fmt"
+	"os"
+	"path/filepath"
+	"slices"
+	"strings"
+
+	"coopcloud.tech/abra/pkg/log"
+	"github.com/leonelquinteros/gotext"
+)
+
+//go:embed locales/*.mo
+var assetFS embed.FS
+
+var (
+	DefaultLocale = "en"
+	Locale        = DefaultLocale
+)
+
+func LoadLocale() *gotext.Mo {
+	entries, err := assetFS.ReadDir("locales")
+	if err != nil {
+		log.Fatalf("i18n: unable to read embedded locales directory: %s", err)
+	}
+
+	var linguas []string
+	for _, entry := range entries {
+		if filepath.Ext(entry.Name()) == ".mo" {
+			fname := entry.Name()
+			fnameWithoutExt := strings.TrimSuffix(fname, filepath.Ext(fname))
+			linguas = append(linguas, fnameWithoutExt)
+		}
+	}
+
+	locale := os.Getenv("LANG")
+	if locale != "" {
+		if slices.Contains(linguas, locale) {
+			Locale = locale
+		} else {
+			log.Debugf("unsupported language: %s (want: %s)", locale, strings.Join(linguas, " "))
+		}
+	}
+
+	if Locale == DefaultLocale {
+		return gotext.NewMo()
+	}
+
+	b, err := assetFS.ReadFile(fmt.Sprintf("locales/%s.mo", Locale))
+	if err != nil {
+		log.Fatalf("i18n: %s", err)
+	}
+
+	mo := gotext.NewMo()
+	mo.Parse(b)
+
+	return mo
+}
+
+var G = LoadLocale().Get