feat: support i18n in backend err messages (#1232)

* feat: support i18n in backend err messages

* use gofumpt to fmt code

* fix review problems

* support auto generate err message

* delete beego/i18n moudle

* fix Github action test problems

* fix review problems

* use gofumpt to format code

* use gofumpt to fmt code

i18n/generate_backend.go

@@ -0,0 +1,122 @@
+// Copyright 2022 The Casdoor Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package i18n
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"github.com/Unknwon/goconfig"
+	"github.com/casdoor/casdoor/util"
+)
+
+var (
+	reI18nBackendObject    *regexp.Regexp
+	re18nBackendController *regexp.Regexp
+)
+
+func init() {
+	reI18nBackendObject, _ = regexp.Compile("i18n.Translate\\((.*?)\"\\)")
+	re18nBackendController, _ = regexp.Compile("c.T\\((.*?)\"\\)")
+}
+
+func GetAllI18nStrings(fileContent string, path string) []string {
+	res := []string{}
+	if strings.Contains(path, "object") {
+		matches := reI18nBackendObject.FindAllStringSubmatch(fileContent, -1)
+		if matches == nil {
+			return res
+		}
+		for _, match := range matches {
+			match := strings.Split(match[1], ",")
+			res = append(res, match[1][2:])
+		}
+	} else {
+		matches := re18nBackendController.FindAllStringSubmatch(fileContent, -1)
+		if matches == nil {
+			return res
+		}
+		for _, match := range matches {
+			res = append(res, match[1][1:])
+		}
+	}
+
+	return res
+}
+
+func getAllGoFilePaths() []string {
+	path := "../"
+
+	res := []string{}
+	err := filepath.Walk(path,
+		func(path string, info os.FileInfo, err error) error {
+			if err != nil {
+				return err
+			}
+
+			if !strings.HasSuffix(info.Name(), ".go") {
+				return nil
+			}
+
+			res = append(res, path)
+			// fmt.Println(path, info.Name())
+			return nil
+		})
+	if err != nil {
+		panic(err)
+	}
+
+	return res
+}
+
+func getErrName(paths []string) map[string]bool {
+	ErrName := make(map[string]bool)
+	for i := 0; i < len(paths); i++ {
+		content := util.ReadStringFromPath(paths[i])
+		words := GetAllI18nStrings(content, paths[i])
+		for i := 0; i < len(words); i++ {
+			ErrName[words[i]] = true
+		}
+	}
+	return ErrName
+}
+
+func writeToAllLanguageFiles(errName map[string]bool) {
+	languages := "en,zh,es,fr,de,ja,ko,ru"
+	languageArr := strings.Split(languages, ",")
+	var c [10]*goconfig.ConfigFile
+	for i := 0; i < len(languageArr); i++ {
+		var err error
+		c[i], err = goconfig.LoadConfigFile("../i18n/languages/" + "locale_" + languageArr[i] + ".ini")
+		if err != nil {
+			log.Println(err.Error())
+		}
+		for j := range errName {
+			parts := strings.Split(j, ".")
+			_, err := c[i].GetValue(parts[0], parts[1])
+			if err != nil {
+				c[i].SetValue(parts[0], parts[1], parts[1])
+			}
+		}
+		c[i].SetPrettyFormat(true)
+		err = goconfig.SaveConfigFile(c[i], "../i18n/languages/"+"locale_"+languageArr[i]+".ini")
+		if err != nil {
+			log.Println(err)
+		}
+	}
+}