API to CalDAV / CardDAV feed connector

I require a developer to create a CalDAV & CardDAV connector for OSX using [login to view URL] API The user data is easily accessible via the [login to view URL] API which has multiple connection methods. Similarly, there are a number of existing CalDAV / CardDAV servers which can be used to handle the feed creation and user authentication. - New user registers for account on my website - During account setup process, user connects their [login to view URL] account and provides access to Contacts / Calendar - Using data from the user's [login to view URL] account, create a CardDAV & CalDAV feed - User can subscribe to the feeds from OS X Contacts & iCal by logging in to our CardDAV / CalDAV server using the account details they created when registering for my website An example of how the user might subscribe to the CardDAV feed can be seen on this tutorial for Google Contacts: [login to view URL] I am open to which technology should be used to create this tool, but in the first instance we should consider PHP / MySQL. There are a number of resources available to simplify the development process: [login to view URL] People / Contacts API: [login to view URL] [login to view URL] Calendar API: [login to view URL] CalDAV / CardDAV Servers: [login to view URL] [login to view URL] [login to view URL] CardDAV Format: [login to view URL] CalDAV Format: [login to view URL]