XenForo 2 Module

[yuliu]

#234. I've tested it with a small test forum's database provided by @euantorano, thank you for the offering. It should also work on XenForo 2.1 as changes in 2.1 don't involve huge differences.

Tesst and reports are welcome.

Modules that are not supported in this PR:

• Forum Permissions ¹
• Bans

Working modules:

• Settings
• Usergroups ²
• Users
• Forums
• Moderators
• Threads
• Polls
• Poll Votes
• Posts ³
• Private Messages
• Avatars ⁴
• Attachments ⁵

Note:

1. Importing permissions of user group & forum is currently not supported. Permissions are a little bit complex and implicit to me with only XenForo database dump, which are not immediately ready to be supported in this PR.
2. (see 1)
3. The bbcode parser should work on most of built-in XenForo bbcodes that have equivalent ones in MyBB.
   3.1. [quote] code for quoting post is not handled at this moment.
   3.2. Video/Media codes that are not supported by current MyBB 1.8 will not be converted.
4. To import avatars and attachments, it might be best to set up an http server accessible by the Merge System, eg. http://xf.example.tld or https://example.tld/xf to serve attachments & avatars.
5. (see 3)

[euantorano]

Nice one! I'm going to try and do some tetsing on this this weekend and see how I get on. I'm in favour of merging sooner rather than later, and then patchig any issues in the future.