[pgAdmin4][Patch]: Fixed RM #1165 - Too many request to update dashboard graphs when server is disconnected.

[Khushboo Vashi]

Hi,

Please find the attached patch to fix the RM #1165 - Too many request to
update dashboard graphs when server is disconnected.

Thanks,
Khushboo

diff --git a/web/pgadmin/dashboard/templates/dashboard/js/dashboard.js b/web/pgadmin/dashboard/templates/dashboard/js/dashboard.js
index 34a1ab7..e858faa 100644
--- a/web/pgadmin/dashboard/templates/dashboard/js/dashboard.js
+++ b/web/pgadmin/dashboard/templates/dashboard/js/dashboard.js
@@ -89,28 +89,35 @@ function(r, $, pgAdmin, _, Backbone, gettext) {
                         );
 
                     if (div) {
-                        // Avoid unnecessary reloads
-                        if (url != $(dashboardPanel).data('dashboard_url')) {
-                            // Clear out everything so any existing timers die off
+                        if (itemData.connected || _.isUndefined(itemData.connected)) {
+                            // Avoid unnecessary reloads
+                            if (url != $(dashboardPanel).data('dashboard_url')) {
+                                // Clear out everything so any existing timers die off
+                                $(div).empty();
+
+                                $.ajax({
+                                    url: url,
+                                    type: "GET",
+                                    dataType: "html",
+                                    success: function (data) {
+                                        $(div).html(data);
+                                    },
+                                    error: function (xhr, status) {
+                                        $(div).html(
+                                            '<div class="alert alert-danger pg-panel-message" role="alert">' + gettext('An error occurred whilst loading the dashboard.') + '</div>'
+                                        );
+                                    }
+                                });
+                            }
+                        }
+                        else {
                             $(div).empty();
-
-                            $.ajax({
-                                url: url,
-                                type: "GET",
-                                dataType: "html",
-                                success: function (data) {
-                                    $(div).html(data);
-                                },
-                                error: function (xhr, status) {
-                                    $(div).html(
-                                        '<div class="alert alert-danger pg-panel-message" role="alert">' + gettext('An error occurred whilst loading the dashboard.') + '</div>'
-                                    );
-                                }
-                            });
-
-                            // Cache the current IDs for next time
-                            $(dashboardPanel).data('dashboard_url', url);
+                            $(div).html(
+                                '<div class="alert alert-info pg-panel-message" role="alert">' + gettext('Please connect to the selected server to view the dashboard.') + '</div>'
+                            );
                         }
+                        // Cache the current IDs for next time
+                        $(dashboardPanel).data('dashboard_url', url);
                     }
                 }
             }