Add support for quote comments and improve quote detection

[pfefferle]

Introduces a new 'quote' comment type, updates interaction handling to extract and process quote links from content, and enhances reply detection to recognize quote-inline patterns. Includes comprehensive tests for quote extraction and reply identification.

supersedes #2303

Proposed changes:

• Adds a new 'quote' comment type with appropriate metadata and translations
• Implements quote link extraction from HTML content with regex pattern matching
• Enhances reply detection to recognize quote-inline patterns in addition to standard inReplyTo properties

Other information:

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

Testing instructions:

• Go to '..'

Changelog entry

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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

[Copilot]

Pull Request Overview

This PR introduces support for quote comments in the ActivityPub plugin by adding detection and handling of quote-inline patterns commonly used by Mastodon and other Fediverse platforms. It enhances the reply detection system to recognize quote patterns and processes them as a new comment type.

• Adds a new 'quote' comment type with appropriate metadata and translations
• Implements quote link extraction from HTML content with regex pattern matching
• Enhances reply detection to recognize quote-inline patterns in addition to standard inReplyTo properties

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/phpunit/tests/includes/collection/class-test-interactions.php	Adds comprehensive tests for quote link extraction and quote comment creation
tests/phpunit/tests/includes/class-test-functions.php	Adds tests for enhanced reply detection including quote-inline pattern recognition
includes/functions.php	Updates is_activity_reply function to detect quote-inline patterns
includes/collection/class-interactions.php	Implements extract_quote_link method and integrates quote handling into comment creation
includes/class-comment.php	Registers new 'quote' comment type and updates descriptions for existing comment types

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[Jiwoon-Kim]

What do you think of this idea?

When a QuoteRequest activity is received, it’s stored in the wp_comment table with comment_type=QuoteRequest and comment_status=moderated.
When the comment is approved, an Accept activity is triggered.
This method is also used to display the quote count.

In the case of Misskey quotes, when the quoteUri property exists, it indicates that the post has been quoted — however, it isn’t reflected in the quote count.

https://docs.akkoma.dev/stable/development/ap_extensions/#quote-posts

Old Misskey only understood and modern Misskey still prefers the _misskey_quote property for this. Similar some other older software used quoteUrl or quoteURL.
All current implementations with quote support understand quoteUri.

To quote a Misskey note in WordPress, the quoteUri property must be supported.
Since FEP-044f has been implemented, notifications can be received when detected, but quoting is not possible.