Cocoa Compress / Decompress 7zip

This project will require a Cocoa based application to run on macintosh osx operating system The software will monitor a specified directory for an XML file. Once that XML file is present the software will do one of two things based off the instructions A. [login to view URL] the supplied directory into a 7z file using command line 7z utility for the macintosh. 2. move the compressed file to the correct location 3. check the compressed file for validity. 4. remove the original directory and it's contents. Or B. 1. decompress the supplied 7z file to a location specified within the XML document.