Ubuntu :: Check For That) Then Add The Name Of That File To A Text File?

i am writing a script for my ubuntu server and basically i want it to download a file that i specifically type in then take that file put it in a certain folder (note file may or may not be archived so i'd have to check for that) then add the name of that file to a text file.i know sounds strange but this is what i got so far:

Code:
#!/bin/bash
echo "-----Star of Script-----"
echo "Please enter URL:"
read URL
cd testdir
wget $URL
//extraction here + delete original archive (rar,zip,anything :S)
echo name_of_file >> list.txt
echo "-----End of Script-----"