Add the beginnings of a clsi-maintenance-mode message

services/web/app/views/project/editor/pdf.jade

@@ -74,8 +74,9 @@ div.full-size.pdf(ng-controller="PdfController")
 			)
 				i.split-screen
 				i.split-screen
-
-	.pdf-viewer(ng-show="pdf.url && pdf.view == 'pdf' && !pdf.failure && !pdf.timeout && !pdf.error && !pdf.renderingError")
+	// end of toolbar
+	
+	.pdf-viewer(ng-show="pdf.url && pdf.view == 'pdf' && !pdf.failure && !pdf.timeout && !pdf.error && !pdf.renderingError && !pdf.clsiMaintenance")
 		div(
 			pdfng
 			ng-if="settings.pdfViewer == 'pdfjs'"
@@ -96,12 +97,15 @@ div.full-size.pdf(ng-controller="PdfController")
 		|  
 		i.fa.fa-level-up.fa-flip-horizontal.fa-2x
 		|   #{translate('click_here_to_preview_pdf')}
-
-	.pdf-errors(ng-show="(pdf.timedout || pdf.error || pdf.renderingError) && pdf.view != 'logs'")
+	
+	.pdf-errors(ng-show="(pdf.timedout || pdf.error || pdf.renderingError || pdf.clsiMaintenance) && pdf.view != 'logs'")
 		.alert.alert-danger(ng-show="pdf.error || pdf.renderingError")
 			strong #{translate("server_error")} 
 			span #{translate("somthing_went_wrong_compiling")}
 		
+		.alert.alert-danger(ng-show="pdf.clsiMaintenance")
+			strong #{translate("server_error")} 
+			span #{translate("clsi_maintenance")}
 
 		.alert.alert-danger(ng-show="pdf.timedout")
 			p
@@ -158,10 +162,6 @@ div.full-size.pdf(ng-controller="PdfController")
 			span #{translate("project_too_large_please_reduce")}
 		
 
-		
-
-
-
 	.pdf-logs(ng-show="(pdf.view == 'logs' || pdf.failure) && !pdf.error && !pdf.timeout && !pdf.uncompiled")
 		.alert.alert-success(ng-show="pdf.logEntries.all.length == 0")
 			| #{translate("no_errors_good_job")}

services/web/public/coffee/ide/pdf/controllers/PdfController.coffee

@@ -37,6 +37,7 @@ define [
 			$scope.pdf.uncompiled = false
 			$scope.pdf.projectTooLarge = false
 			$scope.pdf.url        = null
+			$scope.pdf.clsiMaintenance = false
 
 			if response.status == "timedout"
 				$scope.pdf.timedout = true
@@ -47,6 +48,8 @@ define [
 			else if response.status == "failure"
 				$scope.pdf.failure = true
 				fetchLogs()
+			else if response.status == 'clsi-maintenance'
+				$scope.pdf.clsiMaintenance = true
 			else if response.status == "success"
 				# define the base url
 				$scope.pdf.url = "/project/#{$scope.project_id}/output/output.pdf?cache_bust=#{Date.now()}"