Fix notification issues (#67)

* Fix notification issues

- Error messages from "Find Aggregated Object" produced 2 errors,
  1 which were empty if there was no backend running. Now there
  is only one message and it will tell if the backend is not
  running.
- Error messages from upload buttons on subscription page and
  test rules page produced an alert besides the normal error
  message field. They are now removed.
- Eiffel intelligence info menu link showed no text. The message
  is now removed as the page already says that the server
  cannot be contacted.
- Other minor message errors.

Author: erik-edling

src/main/resources/static/js/eiInfo.js

@@ -143,7 +143,6 @@ jQuery(document).ready(function() {
               contentType : 'application/json;charset=UTF-8',
               type: 'GET',
               error : function (XMLHttpRequest, textStatus, errorThrown) {
-                  window.logMessages(XMLHttpRequest.responseText);
                   if (XMLHttpRequest.responseText == "") {
                       document.getElementById("eiPageFrame").innerHTML = "<h3 style=\"text-align: center;\">There is no response from backend</h3>";
                   } else {

src/main/resources/static/js/subscription.js

@@ -448,7 +448,7 @@ jQuery(document).ready(function () {
 
         // Check if no Subscription has been marked to be deleted.
         if (subscriptionsToDelete.length < 1) {
-            $.alert("No subscriptions has been marked to be deleted.");
+            window.logMessages("No subscriptions has been marked to be deleted.");
             return;
         }
 
@@ -505,8 +505,12 @@ jQuery(document).ready(function () {
         req.open("GET", frontendServiceUrl + '/download/subscriptionsTemplate', true);
         req.responseType = "application/json;charset=utf-8";
         req.onload = function (event) {
-            var jsonData = JSON.stringify(JSON.parse(req.response), null, 2);
-            downloadFile(jsonData, "application/json;charset=utf-8", "subscriptionsTemplate.json");
+            if (this.responseText == ""){
+                window.logMessages("Failed to download template, Error: Could not contact the backend server.");
+            } else {
+                var jsonData = JSON.stringify(JSON.parse(req.response), null, 2);
+                downloadFile(jsonData, "application/json;charset=utf-8", "subscriptionsTemplate.json");
+            }
         };
         req.send();
     }
@@ -530,7 +534,6 @@ jQuery(document).ready(function () {
                 jsonLintResult = jsonlint.parse(fileContent);
             } catch (e) {
                 window.logMessages("JSON Format Check Failed:\n" + e.name + "\n" + e.message);
-                $.alert("JSON Format Check Failed:\n" + e.name + "\n" + e.message);
                 return false;
             }
             $.jGrowl('JSON Format Check Succeeded', {

src/main/resources/static/js/testrules.js

@@ -41,7 +41,6 @@ jQuery(document).ready(
             callback.beforeSend();
           },
           error : function(XMLHttpRequest, textStatus, errorThrown) {
-            window.logMessages(XMLHttpRequest.responseText);
             callback.error(XMLHttpRequest, textStatus, errorThrown);
           },
           success : function(data, textStatus) {
@@ -140,7 +139,11 @@ jQuery(document).ready(
               }
             },
             error : function(XMLHttpRequest, textStatus, errorThrown) {
-                window.logMessages("Failed to generate the aggregated object" + " Error: " + XMLHttpRequest.responseText);
+                if (XMLHttpRequest.responseText == ""){
+                    window.logMessages("Failed to generate the aggregated object, Error: Could not contact the backend server.");
+                } else {
+                    window.logMessages("Failed to generate the aggregated object, Error: " + XMLHttpRequest.responseText);
+                }
             },
             complete : function() {
             }
@@ -179,7 +182,6 @@ jQuery(document).ready(
 	          jsonLintResult = jsonlint.parse(fileContent);
 	        } catch (e) {
 	            window.logMessages("JSON Format Check Failed:\n" + e.name + "\n" + e.message);
-	            $.alert("JSON Format Check Failed:\n" + e.name + "\n" + e.message);
 	            return false;
 	        }
 	        $.jGrowl('JSON Format Check Succeeded', {
@@ -209,7 +211,6 @@ jQuery(document).ready(
               jsonLintResult = jsonlint.parse(fileContent);
             } catch (e) {
                 window.logMessages("JSON events Format Check Failed:\n" + e.name + "\n" + e.message);
-                $.alert("JSON events Format Check Failed:\n" + e.name + "\n" + e.message);
                 return false;
             }
             $.jGrowl('JSON events Format Check Succeeded', {
@@ -326,8 +327,12 @@ jQuery(document).ready(
         request.open("GET", frontendServiceUrl + '/download/' + name, true);
         request.responseType = "application/json;charset=utf-8";
         request.onload = function (event) {
-           var jsonData = JSON.stringify(JSON.parse(request.response), null, 2);
-           downloadFile(jsonData, "application/json;charset=utf-8", name + ".json");
+           if (this.responseText == ""){
+               window.logMessages("Failed to download template, Error: Could not contact the backend server.");
+           } else {
+               var jsonData = JSON.stringify(JSON.parse(request.response), null, 2);
+               downloadFile(jsonData, "application/json;charset=utf-8", name + ".json");
+           }
         };
         request.send();
       }