[wp-trac] [WordPress Trac] #43298: Add filter to hide comment types from showing up in the default query

[WordPress Trac]

#43298: Add filter to hide comment types from showing up in the default query
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 Reporter:  atimmer      |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  Awaiting Review
Component:  Comments     |    Version:  trunk
 Severity:  normal       |   Keywords:
  Focuses:               |
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 Comment types are not something WordPress supports by default. However,
 there is some data and API support for it. The `wp_comments` table
 contains a `comment_type` column which can be used for this purpose. The
 big downside is that by default these will be shown in all comment
 overview. Both on the frontend and the backend.

 There are plugins that already do this. The examples that triggered this
 ticket are
 [https://github.com/woocommerce/woocommerce/blob/d2e9b366121166c7cb26936bd2c251f3dd7ebd5d/includes
 /class-wc-comments.php#L110 WooCommerce] and
 [https://github.com/WordPress/gutenberg/pull/4685/files#diff-
 df5e27f1866a42a0c24ae7c0b17b1bc6R496 this PR on Gutenberg]. These plugins
 use the `where` clause in the pieces of the query to make this possible.

 I propose we add a 'simple' filter that can hide specific comment types
 from view. If `comment_type` is not queried in any other way, this
 blacklist will make sure that all comment types in the blacklist are not
 returned from the query.

 '''Why not wait for full comment_type support?'''

 Full `comment_type` support is a much bigger effort. This filter would
 benefit us in the short run and doesn't conflict with full `comment_type`
 support.

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Ticket URL: <https://core.trac.wordpress.org/ticket/43298>
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