[wp-trac] [WordPress Trac] #38218: Introduce a WP_Post_Type_Labels class

[WordPress Trac]

#38218: Introduce a WP_Post_Type_Labels class
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 Reporter:  swissspidy                    |       Owner:  (none)
     Type:  enhancement                   |      Status:  new
 Priority:  normal                        |   Milestone:  Future Release
Component:  Posts, Post Types             |     Version:
 Severity:  normal                        |  Resolution:
 Keywords:  needs-patch needs-unit-tests  |     Focuses:
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Comment (by swissspidy):

 Yeah so I added a PoC implementation two years ago for such a class:
 https://core.trac.wordpress.org/attachment/ticket/26511/WP_Post_Type_Labels.diff

 I imagined it to work like this:

 1. Register a new post type A
 2. Only define the `name` label and let `get_post_type_labels()` provide
 the rest. (This is what many plugins do, in a nutshell)
 3. `WP_Post_Type::$labels` is a magic method that returns an array
 containing `name` plus any other labels provided on the fly by
 `get_post_type_labels()`, either using a `WP_Post_Type_Label` class or
 something else.
 4. Register a new post type B
 5. Pass a callback function to `labels` that returns an array with a
 single key, `name`.
 6. `WP_Post_Type::$labels` is a magic method that returns a merged array
 of the callback's result + any missing labels from
 `get_post_type_labels()`. Again, the specifics of that are TBD.

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Ticket URL: <https://core.trac.wordpress.org/ticket/38218#comment:7>
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