Fix #299 -- Make javascript's gettext calls failsafe

src/static/pretixpresale/js/ui/asynctask.js

@@ -1,4 +1,4 @@
-/*global $, waitingDialog, gettext */
+/*global $, waitingDialog, failsafe_gettext */
 var async_task_id = null;
 var async_task_timeout = null;
 var async_task_check_url = null;
@@ -46,7 +46,7 @@ function async_task_error(jqXHR, textStatus, errorThrown) {
     if (c.length > 0) {
         ajaxErrDialog.show(c.first().html());
     } else {
-        alert(gettext('Unknown error.'));
+        alert(failsafe_gettext('Unknown error.'));
     }
 }
 
@@ -58,7 +58,7 @@ $(function () {
             return;
         }
         $(this).data('ajaxing', true);
-        waitingDialog.show(gettext('We are processing your request …'));
+        waitingDialog.show(failsafe_gettext('We are processing your request …'));
 
         $.ajax(
             {

src/static/pretixpresale/js/ui/cart.js

@@ -1,4 +1,4 @@
-/*global $,django */
+/*global $,failsafe_gettext,failsafe_ngettext */
 
 var cart = {
     _deadline: null,
@@ -7,10 +7,10 @@ var cart = {
     draw_deadline: function () {
         var diff = Math.floor(cart._deadline.diff(moment()) / 1000 / 60);
         if (diff < 0) {
-            $("#cart-deadline").text(django.gettext("The items in your cart are no longer reserved for you."));
+            $("#cart-deadline").text(failsafe_gettext("The items in your cart are no longer reserved for you."));
             window.clearInterval(cart._deadline_interval);
         } else {
-            $("#cart-deadline").text(django.ngettext(
+            $("#cart-deadline").text(failsafe_ngettext(
                 "The items in your cart are reserved for you for one minute.",
                 "The items in your cart are reserved for you for {num} minutes.",
                 diff

src/static/pretixpresale/js/ui/main.js

@@ -1,5 +1,18 @@
 /*global $ */
 
+function failsafe_gettext(msgid) {
+    if (typeof django !== 'undefined' && typeof django.gettext !== 'undefined') {
+        return django.gettext(msgid);
+    }
+    return msgid;
+}
+function failsafe_ngettext(singular, plural, count) {
+    if (typeof django !== 'undefined' && typeof django.ngettext !== 'undefined') {
+        return django.ngettext(singular, plural, count);
+    }
+    return plural;
+}
+
 $(function () {
     "use strict";
     $("input[data-toggle=radiocollapse]").change(function () {
@@ -41,11 +54,11 @@ var ajaxErrDialog = {
         "use strict";
         $("#ajaxerr").html(c);
         $("#ajaxerr .links").html("<a class='btn btn-default ajaxerr-close'>"
-                                  + gettext("Close message") + "</a>");
+                                  + failsafe_gettext("Close message") + "</a>");
         $("body").addClass("ajaxerr");
     },
     hide: function () {
         "use strict";
         $("body").removeClass("ajaxerr");
     }
-};
+};