minor changes

backend/backend.go

@@ -261,7 +261,6 @@ func LatexCompile() error {
 	}
 
 	LogLine("LaTeX execution started", 2)
-	execution.ExecutionState = "Started"
 
 	var latexCommand *exec.Cmd
 	switch config.LatexEngine {
@@ -282,19 +281,17 @@ func LatexCompile() error {
 			return errors.New("Unsupported LaTeX Engine")
 	}
 
-	execution.ExecutionState = "Running"
 	stdout, err := latexCommand.Output()
-	if err != nil { 
-		execution.ExecutionState = "Failed"
-		return err 
-	}
-
 	execution.Output = stdout
-	execution.ExecutionState = "Done"
+	if err == nil { 
+		execution.ExecutionState = globals.LatexExecutionStateSuccess
+	} else {
+		execution.ExecutionState = globals.LatexExecutionStateFailure
+	}
 	updateExecutionTimestamp(execution)
 
 	LogLine("LaTeX execution finished", 2)
-	return nil
+	return err
 }
 
 // Checks whether the proxy is trusted. Returns trusted status and the proxy.