Business central

I would like to download all Extensions (including the Base-Extensions) from the current environment (if allowed). This is the same as VS does this when downloading Symbols. In the next Step the new solution should unpack all the entire Files which are stored in those App-Files. Parse them and store the Information into needed tables.
After the import and parsing was finished all tables, pages, reports, ... are available in an UI inside Business Central.
I expect that the solution will be rough version which I want later to be more and more precise.