My idea consists of a particular 'architecture' involving:
Is an idea such as this 'patentable'? Or can I only apply for a patent on the code that I have wrote myself?
Can you write a patent application for an idea that includes existing technologies? Absolutely. Can you get a patent for something that just adds together existing technologies, and doesn't add anything new? Nope, not very likely.
So let's say you use Open Source tech, code, WordPress, Playstation, and the TV screen to create a brand new way of interacting with your television using interpretive dance. You could most likely get a patent for that. But using those same elements to give you a nicer menu listing for the TV programs is unlikely to be patentable, given what's already out there.
In other words, using existing technologies doesn't impact patentability. The question is what is the new stuff, and is it novel & non-obvious.
As a side note, if you are using Open Source, be aware that different types of Open Source have different impact on your own code. GPL v. 3 requires patent licenses.
Computer programs are not patentable themselves. However, if the program are needed to create a new technology, they can be patented with the new technology as a whole not separately.
