[wp-trac] [WordPress Trac] #48477: Add a hook before creating image sub-sizes

[WordPress Trac]

#48477: Add a hook before creating image sub-sizes
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 Reporter:  GregLone                             |       Owner:  (none)
     Type:  enhancement                          |      Status:  new
 Priority:  normal                               |   Milestone:  5.3.1
Component:  Upload                               |     Version:  5.3
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch needs-testing 2nd-opinion  |     Focuses:
  reporter-feedback                              |
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Comment (by GregLone):

 Replying to [comment:6 azaozz]:
 >  Currently there are (at least) three hooks fired right after a file was
 uploaded:

 The idea is not to have a hook that triggers after a file is uploaded but,
 as the hook’s name suggests, before sub-sizes are created. The difference
 is that it can happen even if the file wasn’t just uploaded: when a plugin
 regenerates thumbnails for example.
 Currently I’m also thinking adding one after the sub-sizes are created and
 recorded in the database, maybe at the end of
 `wp_update_attachment_metadata()`, with an additional context argument
 (`create`/`update`), like you suggested recently if I remember well.

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Ticket URL: <https://core.trac.wordpress.org/ticket/48477#comment:7>
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