From f4a1350a41f75e151d90d84ae9331a0e3063ff41 Mon Sep 17 00:00:00 2001
From: Harvey Kandola <harvey@documize.com>
Date: Wed, 16 Mar 2022 13:32:48 -0400
Subject: [PATCH] i18n server-side loading and setup

---
 core/i18n/localize.go | 74 +++++++++++++++++++++++++++++++++++++++++++
 edition/community.go  |  7 ++++
 2 files changed, 81 insertions(+)
 create mode 100644 core/i18n/localize.go

diff --git a/core/i18n/localize.go b/core/i18n/localize.go
new file mode 100644
index 00000000..27ccaa69
--- /dev/null
+++ b/core/i18n/localize.go
@@ -0,0 +1,74 @@
+package i18n
+
+import (
+	"embed"
+	"encoding/json"
+	"fmt"
+
+	"github.com/documize/community/core/asset"
+
+	"github.com/pkg/errors"
+)
+
+var localeMap map[string]map[string]string
+
+// type translation struct {
+// 	Key   string `json:"key"`
+// 	Value string `json:"value"`
+// }
+
+// SupportedLocales returns array of locales.
+func SupportedLocales() (locales []string) {
+	locales = append(locales, "en-US")
+
+	return
+}
+
+// Intialize will load language files
+func Initialize(e embed.FS) (err error) {
+	localeMap = make(map[string]map[string]string)
+
+	locales := SupportedLocales()
+
+	for i := range locales {
+		content, _, err := asset.FetchStatic(e, "i18n/"+locales[i]+".json")
+		if err != nil {
+			err = errors.Wrap(err, fmt.Sprintf("missing locale %s", locales[i]))
+			return err
+		}
+
+		var payload interface{}
+		json.Unmarshal([]byte(content), &payload)
+		m := payload.(map[string]interface{})
+
+		// translations := []translation{}
+
+		translations := make(map[string]string)
+
+		for j := range m {
+			translations[j] = m[j].(string)
+		}
+
+		localeMap[locales[i]] = translations
+	}
+
+	return nil
+}
+
+// Localize will returns string value for given key using specified locale).
+// e.g. locale = "en-US", key = "admin_billing"
+func Localize(locale, key string) (s string) {
+	l, ok := localeMap[locale]
+	if !ok {
+		// fallback
+		l = localeMap["en-US"]
+	}
+
+	s, ok = l[key]
+	if !ok {
+		// missing translation key is echo'ed back
+		s = fmt.Sprintf("!! %s !!", key)
+	}
+
+	return
+}
diff --git a/edition/community.go b/edition/community.go
index 27f44cf0..c6ebba7d 100644
--- a/edition/community.go
+++ b/edition/community.go
@@ -18,6 +18,7 @@ import (
 	"os"
 
 	"github.com/documize/community/core/env"
+	"github.com/documize/community/core/i18n"
 	"github.com/documize/community/domain"
 	"github.com/documize/community/domain/section"
 	"github.com/documize/community/domain/store"
@@ -62,6 +63,12 @@ func main() {
 	}
 	rt.Log.Info("Configuration: " + rt.Flags.ConfigSource)
 
+	// i18n
+	err := i18n.Initialize(rt.Assets)
+	if err != nil {
+		rt.Log.Error("i18n", err)
+	}
+
 	// Start database init.
 	boot.InitRuntime(&rt, &s)