when user doesn't have access to map error message is improved,

moreover when anonymous user tries to access secured map redirection is in place

frontend-js/src/main/js/GuiConnector.js

@@ -159,33 +159,40 @@ GuiConnector.hideProcessing = function () {
   $(self._processingDialog).dialog("close");
 };
 
-GuiConnector.alert = function (error) {
-  var self = GuiConnector;
-  logger.error(error);
-  if (self._errorDialog === undefined) {
-    self._errorDialog = document.createElement("div");
-    self._errorDialogContent = document.createElement("div");
-    self._errorDialog.appendChild(self._errorDialogContent);
-    document.body.appendChild(self._errorDialog);
-    $(self._errorDialog).dialog({
-      classes: {
-        "ui-dialog": "ui-state-error"
-      },
-      modal: true,
-      title: "ERROR"
-    }).siblings('.ui-dialog-titlebar').css("background", "red");
+GuiConnector.alert = function (error, redirectIfSecurityError) {
+  if (redirectIfSecurityError === undefined) {
+    redirectIfSecurityError = false;
   }
-  var message = error;
-  if (message instanceof SecurityError) {
-    message = error.message + "<p>Please <a href=\"login.xhtml?from="+encodeURI(window.location.href)+"\">login</a> to access this resource</p>";
-  } else if (message instanceof NetworkError && (error.message === "XHR error" || error.message === "Failed to fetch")) {
-    message = "File to big.<br>Please reduce file size or contact administrators.";
-  } else if (message instanceof Error) {
-    message = "Unexpected error occurred:<p>" + error.message + "</p>";
+  if (redirectIfSecurityError && error instanceof SecurityError && ServerConnector.getSessionData().getLogin() === "anonymous") {
+    window.location.href = ServerConnector.getServerBaseUrl() + "login.xhtml?from=" + encodeURI(window.location.href);
+  } else {
+    var self = GuiConnector;
+    logger.error(error);
+    if (self._errorDialog === undefined) {
+      self._errorDialog = document.createElement("div");
+      self._errorDialogContent = document.createElement("div");
+      self._errorDialog.appendChild(self._errorDialogContent);
+      document.body.appendChild(self._errorDialog);
+      $(self._errorDialog).dialog({
+        classes: {
+          "ui-dialog": "ui-state-error"
+        },
+        modal: true,
+        title: "ERROR"
+      }).siblings('.ui-dialog-titlebar').css("background", "red");
+    }
+    var message = error;
+    if (message instanceof SecurityError) {
+      message = error.message + "<p>Please <a href=\"login.xhtml?from=" + encodeURI(window.location.href) + "\">login</a> " +
+        "as a different user or ask your administrator to change the permissions to access this resource.</p>";
+    } else if (message instanceof NetworkError && (error.message === "XHR error" || error.message === "Failed to fetch")) {
+      message = "File to big.<br>Please reduce file size or contact administrators.";
+    } else if (message instanceof Error) {
+      message = "Unexpected error occurred:<p>" + error.message + "</p>";
+    }
+    self._errorDialogContent.innerHTML = message;
+    $(self._errorDialog).dialog("open");
   }
-  self._errorDialogContent.innerHTML = message;
-  $(self._errorDialog).dialog("open");
-
 };
 
 module.exports = GuiConnector;

web/src/main/webapp/index.xhtml

@@ -39,7 +39,7 @@ function initMap(){
 		customMap = result;
 		document.title = result.getProject().getName();
 	}).catch(function(rejectReason){
-		minerva.GuiConnector.alert(rejectReason);
+		minerva.GuiConnector.alert(rejectReason, true);
 	});
 }