Wordpress plugin to generate ICS files

Greetings, We require a plugin that will: * Generate an ICS file that will be uploaded to an ftp site. (so it can be imported in an agenda). * When a user is logged in and he goes to the page it will show all the info for that specific user (so all users go for example to [login to view URL], but the page will be dynamically build). * Users will have to be able to generate a couple of files. For example: "opening hours" , "closed" , "holidays", "lunchtime" * For each time they will need to be able to select either: - dates (complete day) eg: the holidays - fragments of a day: hour:minutes - make it repetetive: for example: every day from 8 to 10 o'clock AM except saturday and sunday. * Graphically it doesn't need to be an agenda. Dropdown menu's are fine. * But it needs to look good. * The data needs to be put in an ICS file, but also in a database so when they load the page later they can easily edit the times. * Very important: the ICS file may only cover the next 15 days. Every day a cron job will need to recreate the ics file with the next dat. * The project needs to be very well documented.