Add a Filter for Custom Comment Statuses

[dshanske]

​https://developer.wordpress.org/reference/functions/wp_set_comment_status/

Instead of the default being false, the default can easily be a filter that would allow the addition of Custom Comment Statuses.

As far as I know, this is the only place where comment status is hard coded.

[boonebgorges]

@dshanske Can you say a little bit about the use case for introducing custom comment statuses in this way? I don't see a problem with allowing them, but I want to make sure that we don't add any stopgap filters that hamper the future development of a proper API.

[dshanske]

I was thinking about #35532, which asks for an alternative mitigation strategy for the resources used by Pingbacks.

One of the things I mentioned in regards to load as a possibility was to store the pingback and do the source verification later. So if there is a flood of pingbacks...the system could store them all but verify them over time.

That would require a comment status that reflects something that needs to go through the normal verifications and spam filters...but has not yet done so.

I could see some other use cases for those individuals who use comments in non-standard manners...such as for purchase orders and such.

Specifically in regard to this way...lowest hanging fruit. I know there are some people interested in custom comment types for 4.6. I suppose this could be implemented in a different way as part of that, if it ends up being something focused on.

[boonebgorges]

Duplicate of #20977.