feat(service): format bcp47 with script and language only correctly

PR #1815 Solves #1811
angular-translate · Dec 21, 2017 · 6c3b63e · 6c3b63e
1 parent 776c90a
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diff --git a/src/service/translate.js b/src/service/translate.js
@@ -56,7 +56,29 @@ function $translate($STORAGE_KEY, $windowProvider, $translateSanitizationProvide
       bcp47 : function (tag) {
         var temp = (tag || '').split('_').join('-');
         var parts = temp.split('-');
-        return parts.length > 1 ? (parts[0].toLowerCase() + '-' + parts[1].toUpperCase()) : temp;
+
+        switch (parts.length) {
+          case 1: // language only
+            parts[0] = parts[0].toLowerCase();
+            break;
+          case 2: // language-script or language-region
+            parts[0] = parts[0].toLowerCase();
+            if (parts[1].length === 4) { // parts[1] is script
+              parts[1] = parts[1].charAt(0).toUpperCase() + parts[1].slice(1).toLowerCase();
+            } else { // parts[1] is region
+              parts[1] = parts[1].toUpperCase();
+            }
+            break;
+          case 3: // language-script-region
+            parts[0] = parts[0].toLowerCase();
+            parts[1] = parts[1].charAt(0).toUpperCase() + parts[1].slice(1).toLowerCase();
+            parts[2] = parts[2].toUpperCase();
+            break;
+          default:
+            return temp;
+        }
+
+        return parts.join('-');
       },
       'iso639-1' : function (tag) {
         var temp = (tag || '').split('_').join('-');
@@ -825,9 +847,12 @@ function $translate($STORAGE_KEY, $windowProvider, $translateSanitizationProvide
    *     en_US => en_US
    *     en-us => en_US
    * * BCP 47 (RFC 4646 & 4647)
+   *     EN => en
    *     en-US => en-US
    *     en_US => en-US
    *     en-us => en-US
+   *     sr-latn => sr-Latn
+   *     sr-latn-rs => sr-Latn-RS
    *
    * See also:
    * * http://en.wikipedia.org/wiki/IETF_language_tag

diff --git a/test/unit/service/translate.determineLocale.spec.js b/test/unit/service/translate.determineLocale.spec.js
@@ -373,6 +373,20 @@ describe('pascalprecht.translate', function () {
       });
 
       describe('using resolver "bcp47"', function () {
+        describe('should resolve to EN to en', function () {
+          beforeEach(module('pascalprecht.translate', function ($translateProvider, $provide, pascalprechtTranslateOverrider) {
+            pascalprechtTranslateOverrider.getLocale = function () {
+              return 'EN';
+            };
+            $translateProvider
+              .uniformLanguageTag('bcp47')
+              .determinePreferredLanguage();
+          }));
+          it('test', inject(function ($window, $translate) {
+            expect($translate.use()).toEqual('en');
+          }));
+        });
+
         describe('should resolve to en-US to en-US', function () {
           beforeEach(module('pascalprecht.translate', function ($translateProvider, $provide, pascalprechtTranslateOverrider) {
             pascalprechtTranslateOverrider.getLocale = function () {
@@ -428,6 +442,34 @@ describe('pascalprecht.translate', function () {
             expect($translate.use()).toEqual('en');
           }));
         });
+
+        describe('should resolve script without region', function () {
+          beforeEach(module('pascalprecht.translate', function ($translateProvider, $provide, pascalprechtTranslateOverrider) {
+            pascalprechtTranslateOverrider.getLocale = function () {
+              return 'sr-latn';
+            };
+            $translateProvider
+              .uniformLanguageTag('bcp47')
+              .determinePreferredLanguage();
+          }));
+          it('test', inject(function ($window, $translate) {
+            expect($translate.use()).toEqual('sr-Latn');
+          }));
+        });
+
+        describe('should resolve script with region', function () {
+          beforeEach(module('pascalprecht.translate', function ($translateProvider, $provide, pascalprechtTranslateOverrider) {
+            pascalprechtTranslateOverrider.getLocale = function () {
+              return 'sr-latn-rs';
+            };
+            $translateProvider
+              .uniformLanguageTag('bcp47')
+              .determinePreferredLanguage();
+          }));
+          it('test', inject(function ($window, $translate) {
+            expect($translate.use()).toEqual('sr-Latn-RS');
+          }));
+        });
       });
 
       describe('using resolver "iso639-1"', function () {