dashboard: refresh disk download percentage via ajax

circle/dashboard/static/dashboard/disk-list.js

+$(function() {
+  $(".disk-list-disk-percentage").each(function() {
+    var disk = $(this).data("disk-pk");
+    var element = $(this);
+    refreshDisk(disk, element);
+  });
+});
+
+function refreshDisk(disk, element) {
+    $.get("/dashboard/disk/" + disk + "/status/", function(result) {
+      if(result.percentage == null || result.failed == "True") {
+        location.reload(); 
+      } else {
+        var diff = result.percentage - parseInt(element.html());
+        var refresh = 5 - diff;
+        refresh = refresh < 1 ? 1 : (result.percentage == 0 ? 1 : refresh);
+        if(isNaN(refresh)) refresh = 2; // this should not happen
+
+        element.html(result.percentage);
+        setTimeout(function() {refreshDisk(disk, element)}, refresh * 1000);
+      }
+    });
+}

circle/dashboard/templates/dashboard/template-edit.html

@@ -107,10 +107,14 @@
     font-weight: bold;
   }
 </style>
-<script>
-  $(function() {
-    $("#hint_id_num_cores, #hint_id_priority, #hint_id_ram_size").hide();
-  });
-</script>
+{% endblock %}
+
+{% block extra_js %}
+  <script>
+    $(function() {
+      $("#hint_id_num_cores, #hint_id_priority, #hint_id_ram_size").hide();
+    });
+  </script>
 
+  <script src="{{ STATIC_URL }}dashboard/disk-list.js"></script>
 {% endblock %}

circle/dashboard/templates/dashboard/vm-detail.html

@@ -205,4 +205,5 @@
   <script src="{{ STATIC_URL }}dashboard/vm-details.js"></script>
   <script src="{{ STATIC_URL }}dashboard/vm-common.js"></script>
   <script src="{{ STATIC_URL }}dashboard/vm-console.js"></script>
+  <script src="{{ STATIC_URL }}dashboard/disk-list.js"></script>
 {% endblock %}

circle/dashboard/urls.py

@@ -10,7 +10,7 @@ from .views import (
     TemplateDelete, TemplateDetail, TemplateList, TransferOwnershipConfirmView,
     TransferOwnershipView, vm_activity, VmCreate, VmDelete, VmDetailView,
     VmDetailVncTokenView, VmGraphView, VmList, VmMassDelete, VmMigrateView,
-    VmRenewView, DiskRemoveView
+    VmRenewView, DiskRemoveView, get_disk_download_status,
 )
 
 urlpatterns = patterns(
@@ -97,8 +97,11 @@ urlpatterns = patterns(
 
     url(r'^disk/add/$', DiskAddView.as_view(),
         name="dashboard.views.disk-add"),
-    url(r'^profile/$', MyPreferencesView.as_view(),
-        name="dashboard.views.profile"),
     url(r'^disk/(?P<pk>\d+)/remove/$', DiskRemoveView.as_view(),
         name="dashboard.views.disk-remove"),
+    url(r'^disk/(?P<pk>\d+)/status/$', get_disk_download_status,
+        name="dashboard.views.disk-status"),
+
+    url(r'^profile/$', MyPreferencesView.as_view(),
+        name="dashboard.views.profile"),
 )

circle/dashboard/views.py

@@ -2146,3 +2146,18 @@ class DiskRemoveView(DeleteView):
         else:
             messages.success(request, success_message)
             return HttpResponseRedirect("%s#resources" % success_url)
+
+
+@require_GET
+def get_disk_download_status(request, pk):
+    disk = Disk.objects.get(pk=pk)
+    if not disk.has_level(request.user, 'owner'):
+        raise PermissionDenied()
+
+    return HttpResponse(
+        json.dumps({
+            'percentage': disk.get_download_percentage(),
+            'failed': disk.failed
+        }),
+        content_type="application/json",
+    )