Build Following structure

[pfefferle]

This PR is the next step of the Followers/Following milestone. It wraps up the Followers v2 initiative and implements the Following v1 logic.

Proposed changes:

• Actors CRUD: Create, read, update, and delete operations for remote Actor entities.
• Follow collection support: Basic Accept handling when a follow request is accepted by the target actor.
• follow() function: Helper to initiate a Follow request to a remote actor.
• Outbox handling:
  • Follow activities are now added to the outbox.
  • Follow activity generation and delivery.
• Status updates: Follower relationship status transitions from pending to accepted upon receiving an Accept.

Notes:

• Only Accept is handled at this stage; other responses (e.g. Reject) are not implemented with this PR. See Handle Follow rejects #1865

First step towards: #1036

Other information:

• Have you written new tests for your changes, if applicable?

Testing instructions:

• See tests.

Changelog entry

• Automatically create a changelog entry from the details below.

Changelog Entry Details

Significance

• Patch
• Minor
• Major

Type

• Added - for new features
• Changed - for changes in existing functionality
• Deprecated - for soon-to-be removed features
• Removed - for now removed features
• Fixed - for any bug fixes
• Security - in case of vulnerabilities

Message

Support for sending follow requests to remote actors is now in place, including outbox delivery and status updates—UI integration will follow later.

[Copilot]

Pull Request Overview

This PR introduces the initial implementation for the Following structure as part of the Followers v2 initiative, adding support for accepting follow requests, outbox delivery, and basic actors CRUD operations for remote actors. Key changes include:

• New unit tests for Accept, Following, and Actors collections.
• Implementation of new functions (e.g. follow()) and handlers (e.g. Accept) to process follow requests.
• Updates to actor upsert, remote lookup, and related functionalities.

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/includes/handler/class-test-accept.php	Adds unit tests for the Accept handler.
tests/includes/collection/class-test-following.php	Adds comprehensive tests for following requests handling.
tests/includes/collection/class-test-followers.php	Removes an unnecessary line in faulty followers test.
tests/includes/collection/class-test-actors.php	Adds tests for creating, updating, deleting, and looking up remote actors.
includes/handler/class-move.php	Minor change: adds an empty line after upserting target actor data.
includes/handler/class-accept.php	New Accept handler implementation with validation and processing logic.
includes/functions.php	Introduces a new follow() helper function for initiating follow requests.
includes/collection/class-following.php	Implements the Following collection with follow() and accept() methods.
includes/collection/class-actors.php	Updates in actor CRUD operations and lookup logic including upsert, create, update methods.
includes/class-handler.php	Registers the new Accept handler in the global handler registration.
.github/changelog/1839-from-description	Changelog entry for the new follow/outbox support.

[obenland]

This feels really close, nice work!

[pfefferle]

@obenland I changed the Accept handling, so maybe you need to have a second look at: 2b65e48

[obenland]

I changed the Accept handling, so maybe you need to have a second look at: 2b65e48

Looking good! ✨

[obenland]

Let's get it in!