Finalize frontend of session management

logman.rb

@@ -1,7 +1,8 @@
 # module for logging
 module Logman
   def self.log(log)
-    File.write("log/main.log", "[#{Time.now}] #{log}\n", mode: "a")
+    file, line = caller(1, 1)[0].split(":")
+    File.write("log/main.log", "[#{Time.now}] {#{file}:#{line}} #{log}\n", mode: "a")
   end
 
   def self.imp(log)