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/*
* Copyright (C) 2014 ~ 2018 Deepin Technology Co., Ltd.
*
* Author: jouyouyun <jouyouwen717@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package iso
import (
"encoding/xml"
"fmt"
"io/ioutil"
"os"
. "pkg.deepin.io/lib/gettext"
"strings"
"sync"
)
const iso3166XMLFile = "/usr/share/xml/iso-codes/iso_3166.xml"
// map dtd of iso_3166.xml to go structures
type CountryDatabase struct {
Countries []Country `xml:"iso_3166_entry"`
}
type Country struct {
Alpha2Code string `xml:"alpha_2_code,attr"`
Alpha3Code string `xml:"alpha_3_code,attr"`
NumericCode string `xml:"numeric_code,attr"`
CommonName string `xml:"common_name,attr"`
Name string `xml:"name,attr"`
OfficialName string `xml:"official_name,attr"`
}
var countryDatabase *CountryDatabase
var countryDatabaseLock sync.Mutex
var (
errLanguageFormatInvalid = fmt.Errorf("invalid environment variable LANGUAGE")
errCountryCodeInvalid = fmt.Errorf("invalid country code")
)
// GetCountryDatabase return country database that marshaled from ISO
// 3166 xml file.
func GetCountryDatabase() (*CountryDatabase, error) {
countryDatabaseLock.Lock()
defer countryDatabaseLock.Unlock()
if countryDatabase != nil {
return countryDatabase, nil
}
countryDatabase = &CountryDatabase{}
xmlContent, err := ioutil.ReadFile(iso3166XMLFile)
if err != nil {
return countryDatabase, err
}
err = xml.Unmarshal(xmlContent, countryDatabase)
return countryDatabase, err
}
// GetLocaleCountryCode return locale country code by analysis
// environment variable "LANGUAGE".
func GetLocaleCountryCode() (code string, err error) {
return GetCountryCodeForLanguage(getLocalLanguage())
}
func getLocalLanguage() string {
if value := os.Getenv("LANGUAGE"); len(value) > 0 {
return value
}
if value := os.Getenv("LC_ALL"); len(value) > 0 {
return value
}
if value := os.Getenv("LC_MESSAGES"); len(value) > 0 {
return value
}
if value := os.Getenv("LANG"); len(value) > 0 {
return value
}
return "en_US.UTF-8"
}
// GetLocaleCountryName return locale country name by analysis
// environment variable "LANGUAGE".
func GetLocaleCountryName() (name string, err error) {
code, err := GetLocaleCountryCode()
if err != nil {
return
}
return GetCountryNameForCode(code)
}
// GetCountryCodeForLanguage return country code for a language
// variable, e.g. "CN" will be return if passing "zh_CN.UTF-8".
func GetCountryCodeForLanguage(language string) (code string, err error) {
if !strings.Contains(language, "_") {
err = errLanguageFormatInvalid
return
}
var indexFrom, indexTo int
indexFrom = strings.Index(language, "_")
if strings.Contains(language, ".") {
indexTo = strings.Index(language, ".")
} else {
indexTo = len(language)
}
if indexFrom+1 >= indexTo {
err = errLanguageFormatInvalid
return
}
code = language[indexFrom+1 : indexTo]
return
}
// GetCountryNameForCode return country name that corresponding to the
// country code.
func GetCountryNameForCode(code string) (name string, err error) {
database, err := GetCountryDatabase()
if err != nil {
return
}
for _, entry := range database.Countries {
if strings.EqualFold(code, entry.Alpha2Code) {
name = DGettext("iso_3166", entry.Name)
break
}
}
if len(name) == 0 {
err = errCountryCodeInvalid
}
return
}
// GetAllCountryCode return all country code.
func GetAllCountryCode() (codeList []string, err error) {
database, err := GetCountryDatabase()
if err != nil {
return
}
for _, entry := range database.Countries {
codeList = append(codeList, entry.Alpha2Code)
}
return
}
// GetAllCountryNames return all country names.
func GetAllCountryNames() (nameList []string, err error) {
database, err := GetCountryDatabase()
if err != nil {
return
}
for _, entry := range database.Countries {
nameList = append(nameList, DGettext("iso_3166", entry.Name))
}
return
}
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