Allow moderators to add notes to users

[Clorith]

Patch with initial fork of user notes plugin for bbPress.

Functionality:

• Show notes in-post for a user
• Notes are hidden by default, with a toggle under the persons gravatar
• Notes are linked to the post they were created from, as well as who wrote the note and when
• Notes can also be seen on a persons bbPress profile

Notes are stored in usermeta, this ties them easily to a user without needing the flexibility of a custom post type. If it gets to the point where there's so many notes on a user that that it becomes unmanageable as a usermeta I would instead lean towards handling the user and it's a problem on the moderation side more so than the need for more flexibility.

Notes shown in-post for a user (textarea for adding a new note is appended at the bottom of the notes):

The notes shown on a profile page (Notes are always displayed for moderators on profiles):

[SergeyBiryukov]

Adjusted 2272.patch​ for the new theme with a couple enhancements:

• No notes added yet: no-notes.PNG​
• User notes in a topic or reply: notes-in-post.PNG​
• User notes in profile: notes-in-profile.PNG​
• Added "Edit" and "Delete" functionality.
• Notes can be added directly on profile pages as well.
• Notes are auto-expanded when adding, editing, or deleting a note.

Looks OK in the old theme as well, which is still in use on some Rosetta sites: notes-wporg-forums.PNG​.

Commits will follow shortly.

[SergeyBiryukov]

In 5640:

Support Theme: Add styling for user notes toggle.

See #2272.

[SergeyBiryukov]

In 5641:

Support Forums: Allow moderators to add notes to users.

Props Clorith for initial patch.
Fixes #2272.

[SergeyBiryukov]

In 5645:

Support Forums: Display user notes before post content, closer to "Toggle user notes" link.

Remove unused $post_id variable from ::delete_user_note().

See #2272.

[SergeyBiryukov]

In 5646:

Support Forums: Store site ID in addition to post ID associated with a note, as post IDs are not unique across Rosetta forums.

See #2272.

[SergeyBiryukov]

In 5647:

Support Forums: When editing a link, only save new text, don't overwrite existing meta data.

Don't show "Edit" or "Delete" links for notes made on another forum.

See #2272.

[SergeyBiryukov]

In 5648:

Support Forums, User Notes: Link moderator's username to the correct site.

See #2272.

[SergeyBiryukov]

In 5649:

Support Forums, User Notes: Rename "Toggle user notes" link to "User Notes", to prevent "Unflag Author" link from wrapping to a second line.

See #2272.

[SergeyBiryukov]

In 5650:

Support Forums, User Notes: Limit note editing and deletion:

• Only keymasters or the note author can edit a note.
• Only keymasters can delete a note.

See #2272.

[SergeyBiryukov]

In 5652:

Support Forums, User Notes: Make sure only keymasters can see notes on moderators.

See #2272.

[netweb]

If ​#WP20564's wp post meta revisions ever lands it would be good to switch to it ;)

My bad, Post Meta ! User Meta ;)

[SergeyBiryukov]

In 5658:

Support Forums, User Notes: Add view=all to post link associated with a note.

See #2272.

[SergeyBiryukov]

In 5659:

Support Forums, User Notes: Cache notes output to a static variable, following the idea from the original patch, to avoid repeated template function calls.

See #2272.

[SergeyBiryukov]

In 5660:

Support Forums, User Notes: Make plain text URLs in notes clickable.

See #2272.

[SergeyBiryukov]

In 5669:

Support Forums, User Notes: Apply comment_text filters to user note text, including wpautop() and make_clickable().

Remove redundant wp_kses() call, as it already runs on saving.

See #2272.

[SergeyBiryukov]

In 5670:

Support Forums, User Notes: Make sure notes are only displayed for other users.

See #2272.

[SergeyBiryukov]

In 5671:

Support Forums, User Notes: Allow super admins to see notes on the current user.

See #2272.

[SergeyBiryukov]

In 5712:

Support Forums, User Notes: After [5659], make sure the dynamic elements of note adding/editing form (post ID and permalink) are still dynamic.

See #2272.

[SergeyBiryukov]

In 7200:

Support Forums, User Notes: Introduce .has-user-notes class to allow for custom styling.

See #2272.