Index: lams_central/web/toolcontent/import.jsp
===================================================================
diff -u -r5ca819dd0f4447eb517ca030f301b2a4dbab544a -r0559504eae34958a1b85105cedeff10e591a52cf
--- lams_central/web/toolcontent/import.jsp	(.../import.jsp)	(revision 5ca819dd0f4447eb517ca030f301b2a4dbab544a)
+++ lams_central/web/toolcontent/import.jsp	(.../import.jsp)	(revision 0559504eae34958a1b85105cedeff10e591a52cf)
@@ -40,27 +40,38 @@
 			}
 			
 			/**
-			 * Initialise Uppy as the file upload widget
+			 * Initialised Uppy as the file upload widget
 			 */
 			function initFileUpload(tmpFileUploadId, language) {
-				  var uppyProperties = {
-					  // upload immediately 
-					  autoProceed: true,
-					  allowMultipleUploads: true,
-					  debug: false,
-					  restrictions: {
-						// taken from LAMS configuration
-					    maxFileSize: +UPLOAD_FILE_MAX_SIZE,
-					    maxNumberOfFiles: 1,
-					    allowedFileTypes : ['.zip']
-					  },
-					  meta: {
-						  // all uploaded files go to this subdir in LAMS tmp dir
-						  // its format is: upload_<userId>_<timestamp>
-						  'tmpFileUploadId' : tmpFileUploadId,
-						  'largeFilesAllowed' : false
-					  }
-				  };
+				  var allowedFileTypes = ['.zip'],
+				  	  uppyProperties = {
+						  // upload immediately 
+						  autoProceed: true,
+						  allowMultipleUploads: true,
+						  debug: false,
+						  restrictions: {
+							// taken from LAMS configuration
+						    maxFileSize: +UPLOAD_FILE_MAX_SIZE,
+						    maxNumberOfFiles: 1,
+						    allowedFileTypes : allowedFileTypes
+						  },
+						  meta: {
+							  // all uploaded files go to this subdir in LAMS tmp dir
+							  // its format is: upload_<userId>_<timestamp>
+							  'tmpFileUploadId' : tmpFileUploadId,
+							  'largeFilesAllowed' : false
+						  },
+						  onBeforeFileAdded: function(currentFile, files) {
+							  var name = currentFile.data.name,
+							  	  extensionIndex = name.lastIndexOf('.'),
+							  	  valid = allowedFileTypes.includes(name.substring(extensionIndex).trim());
+							  if (!valid) {
+								  uppy.info('<fmt:message key="error.ld.zip.file" />', 'error', 10000);
+							  }
+							  
+							  return valid;
+					    }
+					  };
 				  
 				  switch(language) {
 				  	case 'es' : uppyProperties.locale = Uppy.locales.es_ES; break; 
@@ -86,6 +97,10 @@
 					  width: '100%'
 					});
 				  
+				  uppy.use(Uppy.Informer, {
+					  target: '#image-upload-area'
+				  });
+				  
 				  uppy.use(Uppy.StatusBar, {
 					  target: '#image-upload-area',
 					  hideAfterFinish: false,
@@ -94,6 +109,8 @@
 					  hidePauseResumeButton: true,
 					  hideCancelButton: true
 					});
+				  
+
 			}
 			
 			$(document).ready(function(){