Show Gujarati in the list of UI languages

- Explicitly setup the list of Django languages. Keep them sorted by language
  code.

- Fallback to language name when Django can't provide locale language name.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>

plinth/forms.py

@@ -69,14 +69,21 @@ class LanguageSelectionFormMixin:
         supported_languages = [
             (None, _('Use the language preference set in the browser'))
         ]
+
+        def _get_local_name(language_code, language_name):
+            try:
+                return get_language_info(language_code)['name_local']
+            except KeyError:
+                return language_name
+
         for language_code, language_name in settings.LANGUAGES:
             locale_code = translation.to_locale(language_code)
             plinth_dir = os.path.dirname(plinth.__file__)
             if language_code == 'en' or os.path.exists(
                     os.path.join(plinth_dir, 'locale', locale_code)):
-                supported_languages.append(
-                    (language_code,
-                     get_language_info(language_code)['name_local']))
+                supported_languages.append((language_code,
+                                            _get_local_name(
+                                                language_code, language_name)))
 
         self.fields['language'].choices = supported_languages
 

plinth/web_framework.py

@@ -25,6 +25,7 @@ import stat
 import django.conf
 import django.core.management
 import django.core.wsgi
+from django.conf import global_settings
 from django.contrib.messages import constants as message_constants
 
 from . import cfg, log, module_loader
@@ -114,6 +115,7 @@ def init():
         FORCE_SCRIPT_NAME=cfg.server_dir,
         INSTALLED_APPS=applications,
         IPWARE_META_PRECEDENCE_ORDER=('HTTP_X_FORWARDED_FOR', ),
+        LANGUAGES=get_languages(),
         LOGGING=log.get_configuration(),
         LOGIN_URL='users:login',
         LOGIN_REDIRECT_URL='index',
@@ -161,6 +163,21 @@ def init():
     os.chmod(cfg.store_file, stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP)
 
 
+def get_languages():
+    """Return list of languages to show in the interface.
+
+    Add additional languages that FreedomBox support but Django doesn't.
+
+    """
+    def gettext_noop(string):
+        """Django's actual translation methods need Django to be setup."""
+        return string
+
+    return sorted(list(global_settings.LANGUAGES) + [
+        ('gu', gettext_noop('Gujarati')),
+    ])
+
+
 def get_wsgi_application():
     """Return Django wsgi application."""
     return django.core.wsgi.get_wsgi_application()