AndyB - Open graph thread - Xenforo 2 1.0

Description:
Uses first attachment in threads for open graph.
When creating a new post in Facebook or Twitter, the open graph function will use the first embedded attachment in your thread as the image for the new post.

How to use:
Copy thread URL from your forum. Now go to Facebook or Twitter and start a new post, paste your thread URL.

Questions and answers:
Q: What image is used if the thread doesn't have any attachments?
A: By default your logo is used. However this is not desirable. You should create an Open Graph specific logo which will be 200x200 and enter the path here:
Admin control panel -> Style properties -> Basic options -> Metadata logo URL

I suggest uploading the image to the following directory:
data/assets/logo/open_graph.png
You will need to create the assets/logo directory as XenForo does not have those directories by default.