From a48a4c00138205c3051e086e52301e0166d330e0 Mon Sep 17 00:00:00 2001
From: Gabriel Jenik <gabriel.jenik@gmail.com>
Date: Mon, 27 Jun 2022 04:51:09 -0300
Subject: [PATCH] Fixed issue #18101: Spinning hexagon continues to spin
 although file is correctly downloaded (#2454)

Dev Use FileSaver
---
 assets/scripts/admin/statistics.js | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/assets/scripts/admin/statistics.js b/assets/scripts/admin/statistics.js
index 874bb3bccb1..fd45e6395d1 100644
--- a/assets/scripts/admin/statistics.js
+++ b/assets/scripts/admin/statistics.js
@@ -277,7 +277,6 @@ LS.Statistics2 = function () {
     });
 
     $('#generate-statistics').submit(function () {
-
         hideSection($('#generalfilters-chevron'), $('#statisticsgeneralfilters'));
         hideSection($('#responsefilters-chevron'), $('#filterchoices'))
         $('#statisticsoutput').show();
@@ -285,6 +284,12 @@ LS.Statistics2 = function () {
         $('#statistics-render-chevron').addClass('fa-chevron-down');
         $('#view-stats-alert-info').hide();
         $('#statsContainerLoading').show();
+        if ($('input[name=outputtype]:checked').val() != 'html') {
+            var data = new FormData($(this).get(0));
+            var url = $(this).attr('action');
+            ajaxDownloadStats(url, data);
+            return false;
+        }
         //alert('ok');
     });
 
@@ -590,6 +595,28 @@ LS.Statistics2 = function () {
     $(".stats-showpie").click(function () {
         changeGraphType('showpie', this.parentNode);
     });
+
+    var ajaxDownloadStats = function (url, data) {
+        const xhr = new XMLHttpRequest();
+        xhr.open('POST', url, true);
+        xhr.responseType = 'blob';
+        xhr.onload = () => {
+            const contentDisposition = xhr.getResponseHeader('Content-Disposition');
+            const fileName = contentDisposition ? contentDisposition.match(/filename[^;=\n]*=['"](.*?|[^;\n]*)['"]/)[1] : '';
+            if (fileName.length > 0) {
+                // saveAs is implemented by jszip/fileSaver.js
+                saveAs(xhr.response, fileName);
+            } else {
+                ajaxError();
+            }
+            $('#statsContainerLoading').hide();
+        };
+        xhr.onerror = () => {
+            ajaxError();
+            $('#statsContainerLoading').hide();
+        };
+        xhr.send(data);
+    };
 };
 
 var isWaiting = {};
@@ -615,6 +642,7 @@ function graphQuery(id, cmd, success) {
 }
 
 function ajaxError() {
+    // TODO: Use NotifyFader?
     alert("An error occured! Please reload the page!");
 }