I'd like to create a plugin that exports into a custom document format similar to the way that export to PDF and export to Word currently work in Confluence.
Does anyone have experience creating a custom export plugin for Confluence? If so do you know of any resources or samples that describe what would be involved?
Here are the most useful resources that I've found so far ...
Plugin Tutorial - Adding a custom action to Confluence This shows how to add an action to the "Tools" menu that appears at the top of a confluence page. Additionally it shows how to interact with the Page object to get more info about the page.
Plugin Module Types - The second guide I found helpful was the list of general plugin module types. It was informative to discover that a "plugin" is really a collection of "modules" and seeing this list was helpful to understand how to apply that model to creating a plugin of the type I was looking for. Additionally the Confluence Plugin Guide was also helpful for a breakdown on Confluence specific plugin modules.
The Confluence Developer FAQ Was useful for information on how to convert wiki content from a page into HTML as well as a number of other hard-to-find gems.
Finally, it was hard to find, but in order to understand how to "target" a particular menu or area of the existing UI to extend, I found it very helpful to read about the guide for Creating your Plugin Descriptor.