[wp-trac] [WordPress Trac] #64638: Editor: Register emoji reactions comment meta for Notes

[WordPress Trac]

#64638: Editor: Register emoji reactions comment meta for Notes
-----------------------------+-----------------------
 Reporter:  adamsilverstein  |      Owner:  (none)
     Type:  enhancement      |     Status:  new
 Priority:  normal           |  Milestone:  7.0
Component:  Editor           |    Version:  trunk
 Severity:  normal           |   Keywords:  has-patch
  Focuses:                   |
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 == Summary

 Register the `_wp_note_reactions` comment meta in
 `wp_create_initial_comment_meta()`, alongside the existing
 `_wp_note_status` meta. This meta stores emoji reaction data for the block
 editor's collaborative Notes feature.

 == Data Model

 Each emoji key (e.g., `"👍"`, `"❤️"`) maps to an array of reaction
 objects:

 {{{#!json
 {
   "👍": [
     { "userId": 1, "date": "2025-01-15T10:30:00" },
     { "userId": 2, "date": "2025-01-15T11:00:00" }
   ],
   "❤️": [
     { "userId": 1, "date": "2025-01-15T10:35:00" }
   ]
 }
 }}}

 == REST Schema

 * **Type:** `object`
 * **Single:** `true`
 * **Default:** `[]` (empty array)
 * **`additionalProperties`:** Each property is an array of objects with:
   * `userId` (integer) — The reacting user's ID
   * `date` (string|null, date-time format) — When the reaction was added

 == Auth

 Uses the same `edit_comment` capability check as `_wp_note_status`.

 == Changes

 * Updated `wp_create_initial_comment_meta()` in `src/wp-
 includes/comment.php` to register `_wp_note_reactions` meta.
 * Updated docblock with `@since 7.0.0` tag.
 * Regenerated `tests/qunit/fixtures/wp-api-generated.js`.

 == References

 * Gutenberg PR: [https://github.com/WordPress/gutenberg/pull/75148 #75148]
 * wordpress-develop PR: [https://github.com/WordPress/wordpress-
 develop/pull/10930 #10930]

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Ticket URL: <https://core.trac.wordpress.org/ticket/64638>
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