Giant refactoring of the codebase

1 files changed, 252 insertions, 0 deletions

diff --git a/lib/i18n.go b/lib/i18n.go
new file mode 100644
index 0000000..50652cb
--- /dev/null
+++ b/lib/i18n.go
@@ -0,0 +1,252 @@
+//go:generate gotext -srclang=en update -out=catalog.gen.go -lang=bg,el,en,nl git.thomasvoss.com/euro-cash.eu
+
+package lib
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"golang.org/x/text/language"
+	"golang.org/x/text/message"
+)
+
+type Printer struct {
+	Locale Locale
+	inner  *message.Printer
+}
+
+type Locale struct {
+	Bcp, Name         string
+	dateFmt, moneyFmt string
+	Eurozone, Enabled bool
+}
+
+var (
+	Locales = [...]Locale{
+		{
+			Bcp:      "ca",
+			Name:     "català",
+			dateFmt:  "2/1/2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "de",
+			Name:     "Deutsch",
+			dateFmt:  "2.1.2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "el",
+			Name:     "ελληνικά",
+			dateFmt:  "2/1/2006",
+			Eurozone: true,
+			Enabled:  true,
+		},
+		{
+			Bcp:      "en",
+			Name:     "English",
+			dateFmt:  "02/01/2006",
+			Eurozone: true,
+			Enabled:  true,
+		},
+		{
+			Bcp:      "es",
+			Name:     "español",
+			dateFmt:  "2/1/2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "et",
+			Name:     "eesti",
+			dateFmt:  "2.1.2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "fi",
+			Name:     "suomi",
+			dateFmt:  "2.1.2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "fr",
+			Name:     "français",
+			dateFmt:  "02/01/2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "ga",
+			Name:     "Gaeilge",
+			dateFmt:  "02/01/2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "hr",
+			Name:     "hrvatski",
+			dateFmt:  "02. 01. 2006.",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "it",
+			Name:     "italiano",
+			dateFmt:  "02/01/2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "lb",
+			Name:     "lëtzebuergesch",
+			dateFmt:  "2.1.2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "lt",
+			Name:     "lietuvių",
+			dateFmt:  "2006-01-02",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "lv",
+			Name:     "latviešu",
+			dateFmt:  "2.01.2006.",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "mt",
+			Name:     "Malti",
+			dateFmt:  "2/1/2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "nl",
+			Name:     "Nederlands",
+			dateFmt:  "2-1-2006",
+			Eurozone: true,
+			Enabled:  true,
+		},
+		{
+			Bcp:      "pt",
+			Name:     "português",
+			dateFmt:  "02/01/2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "sk",
+			Name:     "slovenčina",
+			dateFmt:  "2. 1. 2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "sl",
+			Name:     "slovenščina",
+			dateFmt:  "2. 1. 2006",
+			Eurozone: true,
+			Enabled:  false,
+		},
+
+		/* Non-Eurozone locales */
+		{
+			Bcp:      "bg",
+			Name:     "български",
+			dateFmt:  "2.01.2006 г.",
+			Eurozone: false,
+			Enabled:  true,
+		},
+		{
+			Bcp:      "en-US",
+			Name:     "English (US)",
+			dateFmt:  "1/2/2006",
+			Eurozone: false,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "ro",
+			Name:     "română",
+			dateFmt:  "02.01.2006",
+			Eurozone: false,
+			Enabled:  false,
+		},
+		{
+			Bcp:      "uk",
+			Name:     "yкраїнська",
+			dateFmt:  "02.01.2006",
+			Eurozone: false,
+			Enabled:  false,
+		},
+	}
+	/* Map of language codes to Printers.  We do this instead of just
+	   using language.MustParse() directly so that we can easily see if a
+	   language is supported or not. */
+	Printers       map[string]Printer = make(map[string]Printer, len(Locales))
+	DefaultPrinter Printer
+)
+
+func InitPrinters() {
+	for _, loc := range Locales {
+		if loc.Enabled {
+			lang := language.MustParse(loc.Bcp)
+			Printers[strings.ToLower(loc.Bcp)] = Printer{
+				Locale: loc,
+				inner:  message.NewPrinter(lang),
+			}
+		}
+	}
+	DefaultPrinter = Printers["en"]
+}
+
+func (p Printer) T(fmt string, args ...any) string {
+	return p.inner.Sprintf(fmt, args...)
+}
+
+func (p Printer) N(n int) string {
+	return p.inner.Sprint(n)
+}
+
+func (p Printer) Date(d time.Time) string {
+	return d.Format(p.Locale.dateFmt)
+}
+
+/* TODO: Try to use a decimal type here */
+func (p Printer) Money(val float64, round bool) string {
+	var valstr string
+
+	/* Hack to avoid gotext writing these two ‘translations’ into the
+	   translations file */
+	f := p.inner.Sprintf
+	if round {
+		valstr = f("%d", int(val))
+	} else {
+		valstr = f("%.2f", val)
+	}
+
+	/* All Eurozone languages place the eurosign after the value except
+	   for Dutch, English, Gaelic, and Maltese.  Austrian German also
+	   uses Dutch-style formatting, but we do not support that dialect. */
+	switch p.Locale.Bcp {
+	case "en", "en-US", "ga", "mt":
+		return fmt.Sprintf("€%s", valstr)
+	case "nl":
+		return fmt.Sprintf("€ %s", valstr)
+	default:
+		return fmt.Sprintf("%s €", valstr)
+	}
+}
+
+/* Transform ‘en-US’ to ‘en’ */
+func (l Locale) Language() string {
+	return l.Bcp[:2]
+}