Default to EN if language is not recognized (bigbluebutton#805)

app/controllers/application_controller.rb

@@ -99,7 +99,14 @@ def user_locale(user = current_user)
     else
       http_accept_language.language_region_compatible_from(I18n.available_locales)
     end
-    I18n.locale = locale.tr('-', '_') unless locale.nil?
+
+    begin
+      I18n.locale = locale.tr('-', '_') unless locale.nil?
+    rescue
+      # Default to English if there are any issues in language
+      logger.error("Support: User locale is not supported (#{locale}")
+      I18n.locale = "en"
+    end
   end
 
   # Checks to make sure that the admin has changed his password from the default

spec/controllers/application_controller_spec.rb

@@ -80,6 +80,20 @@ def user_not_found
     end
   end
 
+  context "setters" do
+    it "sets the user locale correctly" do
+      user = create(:user, language: "ru-RU")
+
+      expect(controller.user_locale(user)).to eql("ru_RU")
+    end
+
+    it "defaults to English locale if invalid language is set" do
+      user = create(:user, language: "ru")
+
+      expect(controller.user_locale(user)).to eql("en")
+    end
+  end
+
   context "allow_greenlight_accounts" do
     it "allows if user sign up is turned on" do
       allow(Rails.configuration).to receive(:loadbalanced_configuration).and_return(false)