Add support for quote reactions and improve quote detection

includes/class-comment.php

@@ -636,11 +636,12 @@ public static function register_comment_types() {
 			array(
 				'label'          => __( 'Reposts', 'activitypub' ),
 				'singular'       => __( 'Repost', 'activitypub' ),
-				'description'    => __( 'A repost on the indieweb is a post that is purely a 100% re-publication of another (typically someone else\'s) post.', 'activitypub' ),
+				'description'    => __( 'A repost (or Announce) is when a post appears in the timeline because someone else shared it, while still showing the original author as the source.', 'activitypub' ),
 				'icon'           => '♻️',
 				'class'          => 'p-repost',
 				'type'           => 'repost',
 				'collection'     => 'reposts',
+				'display_style'  => 'facepile',
 				'activity_types' => array( 'announce' ),
 				'excerpt'        => html_entity_decode( \__( '… reposted this!', 'activitypub' ) ),
 				/* translators: %d: Number of reposts */
@@ -655,11 +656,12 @@ public static function register_comment_types() {
 			array(
 				'label'          => __( 'Likes', 'activitypub' ),
 				'singular'       => __( 'Like', 'activitypub' ),
-				'description'    => __( 'A like is a popular webaction button and in some cases post type on various silos such as Facebook and Instagram.', 'activitypub' ),
+				'description'    => __( 'A like is a small positive reaction that shows appreciation for a post without sharing it further.', 'activitypub' ),
 				'icon'           => '👍',
 				'class'          => 'p-like',
 				'type'           => 'like',
 				'collection'     => 'likes',
+				'display_style'  => 'facepile',
 				'activity_types' => array( 'like' ),
 				'excerpt'        => html_entity_decode( \__( '… liked this!', 'activitypub' ) ),
 				/* translators: %d: Number of likes */
@@ -668,6 +670,26 @@ public static function register_comment_types() {
 				'count_plural'   => _x( '%d likes', 'number of likes', 'activitypub' ),
 			)
 		);
+
+		register_comment_type(
+			'quote',
+			array(
+				'label'          => __( 'Quotes', 'activitypub' ),
+				'singular'       => __( 'Quote', 'activitypub' ),
+				'description'    => __( 'A quote is when a post is shared along with an added comment, so the original post appears together with the sharer’s own words.', 'activitypub' ),
+				'icon'           => '❞',
+				'class'          => 'p-quote',
+				'type'           => 'quote',
+				'collection'     => 'quotes',
+				'display_style'  => 'comment',
+				'activity_types' => array( 'quote' ),
+				'excerpt'        => html_entity_decode( \__( '… quoted this!', 'activitypub' ) ),
+				/* translators: %d: Number of quotes */
+				'count_single'   => _x( '%d quote', 'number of quotes', 'activitypub' ),
+				/* translators: %d: Number of quotes */
+				'count_plural'   => _x( '%d quotes', 'number of quotes', 'activitypub' ),
+			)
+		);
 	}
 
 	/**
@@ -815,4 +837,50 @@ public static function pre_wp_update_comment_count_now( $new_count, $old_count,
 	public static function is_comment_type_enabled( $comment_type ) {
 		return '1' === get_option( "activitypub_allow_{$comment_type}s", '1' );
 	}
+
+	/**
+	 * Check if a comment type should be displayed as a facepile.
+	 *
+	 * Facepile display shows just avatars and counts (like likes and reposts),
+	 * while comment display shows the full comment content (like quotes and regular comments).
+	 *
+	 * @param string $comment_type The comment type slug.
+	 * @return bool True if the comment type should be displayed as a facepile.
+	 */
+	public static function is_facepile_type( $comment_type ) {
+		$type_data = self::get_comment_type( $comment_type );
+
+		if ( empty( $type_data ) ) {
+			return false;
+		}
+
+		$display_style = $type_data['display_style'] ?? 'comment';
+
+		/**
+		 * Filters whether a comment type should be displayed as a facepile.
+		 *
+		 * @param bool   $is_facepile  True if the comment type should be displayed as a facepile.
+		 * @param string $comment_type The comment type slug.
+		 * @param array  $type_data    The comment type data.
+		 */
+		return apply_filters( 'activitypub_is_facepile_type', 'facepile' === $display_style, $comment_type, $type_data );
+	}
+
+	/**
+	 * Get comment types that should be displayed as facepile.
+	 *
+	 * @return array Array of comment type slugs that should be displayed as facepile.
+	 */
+	public static function get_facepile_types() {
+		$comment_types  = self::get_comment_types();
+		$facepile_types = array();
+
+		foreach ( $comment_types as $slug => $type_data ) {
+			if ( self::is_facepile_type( $slug ) ) {
+				$facepile_types[] = $slug;
+			}
+		}
+
+		return $facepile_types;
+	}
 }

includes/collection/class-interactions.php

@@ -34,10 +34,19 @@ class Interactions {
 	public static function add_comment( $activity ) {
 		$comment_data = self::activity_to_comment( $activity );
 
-		if ( ! $comment_data || ! isset( $activity['object']['inReplyTo'] ) ) {
+		if ( ! $comment_data ) {
 			return false;
 		}
 
+		if ( empty( $activity['object']['inReplyTo'] ) ) {
+			$activity = self::extract_quote_link( $activity );
+			if ( ! empty( $activity['object']['inReplyTo'] ) ) {
+				$comment_data['comment_type'] = 'quote';
+			} else {
+				return false;
+			}
+		}
+
 		$in_reply_to       = object_to_uri( $activity['object']['inReplyTo'] );
 		$in_reply_to       = \esc_url_raw( $in_reply_to );
 		$comment_post_id   = \url_to_postid( $in_reply_to );
@@ -376,4 +385,33 @@ public static function count_by_type( $post_id, $type ) {
 			)
 		);
 	}
+
+	/**
+	 * Extract quote link from HTML content.
+	 *
+	 * Detects quote/reply links in the format used by Mastodon and other Fediverse platforms.
+	 * Pattern: <p class="quote-inline">RE: <a href="...">...</a></p>.
+	 *
+	 * @param array $activity The activity array to search.
+	 *
+	 * @return array The extracted quote link or an empty array if not found.
+	 */
+	public static function extract_quote_link( $activity ) {
+		$content = $activity['object']['content'] ?? '';
+
+		// Pattern to match the entire quote-inline paragraph.
+		$full_pattern = '/<p[^>]*class=["\']quote-inline["\'][^>]*>.*?<\/p>/is';
+
+		if ( \preg_match( $full_pattern, $content, $full_match ) ) {
+			// Extract the URL from the href attribute within the matched content.
+			$url_pattern = '/href=["\'](https?:\/\/[^"\']+)["\']/i';
+			if ( \preg_match( $url_pattern, $full_match[0], $url_matches ) ) {
+				$activity['object']['inReplyTo'] = \esc_url_raw( $url_matches[1] );
+				// Remove the entire quote-inline paragraph from content.
+				$activity['object']['content'] = \preg_replace( $full_pattern, '', $content, 1 );
+			}
+		}
+
+		return $activity;
+	}
 }

includes/functions.php

@@ -618,7 +618,20 @@ function is_activity_public( $data ) {
  * @return boolean True if a reply, false if not.
  */
 function is_activity_reply( $data ) {
-	return ! empty( $data['object']['inReplyTo'] );
+	if ( ! empty( $data['object']['inReplyTo'] ) ) {
+		return true;
+	}
+
+	if ( empty( $data['object']['content'] ) ) {
+		return false;
+	}
+
+	// very simple check for quote content.
+	if ( \preg_match( '/^<p class="quote-inline">.*?<\/p>/i', $data['object']['content'] ) ) {
+		return true;
+	}
+
+	return false;
 }
 
 /**

tests/phpunit/tests/includes/class-test-functions.php

@@ -13,7 +13,6 @@
 use function Activitypub\add_to_outbox;
 use function Activitypub\extract_recipients_from_activity;
 use function Activitypub\extract_recipients_from_activity_property;
-use function Activitypub\get_activity_visibility;
 
 /**
  * Test class for Functions.
@@ -1408,121 +1407,105 @@ public function test_camel_to_snake_case( $original, $expected ) {
 	}
 
 	/**
-	 * Data provider for esc_hashtag tests.
+	 * Test is_activity_reply function with inReplyTo.
 	 *
-	 * @return array Test cases with input and expected output.
+	 * @covers \Activitypub\is_activity_reply
 	 */
-	public function esc_hashtag_provider() {
-		return array(
-			'simple_word'             => array( 'test', '#test' ),
-			'word_with_spaces'        => array( 'test tag', '#testTag' ),
-			'multiple_spaces'         => array( 'test  multiple   spaces', '#testMultipleSpaces' ),
-			'with_special_chars'      => array( 'test@tag!', '#testTag' ),
-			'with_underscores'        => array( 'test_tag', '#testTag' ),
-			'with_leading_hashtag'    => array( '#test', '#Test' ),
-			'with_multiple_hashtags'  => array( '##test', '#Test' ),
-			'with_leading_hyphen'     => array( '-test', '#Test' ),
-			'with_trailing_hyphen'    => array( 'test-', '#test' ),
-			'mixed_case'              => array( 'TestTag', '#TestTag' ),
-			'with_numbers'            => array( 'test123', '#test123' ),
-			'with_unicode'            => array( 'tëst', '#tëst' ),
-			'with_unicode_spaces'     => array( 'tëst tàg', '#tëstTàg' ),
-			'german_umlauts'          => array( 'über straße', '#überStraße' ),
-			'japanese_characters'     => array( 'テスト', '#テスト' ),
-			'arabic_characters'       => array( 'اختبار', '#اختبار' ),
-			'cyrillic_characters'     => array( 'тест', '#тест' ),
-			'empty_string'            => array( '', '#' ),
-			'only_spaces'             => array( '   ', '#' ),
-			'only_special_chars'      => array( '@!#$%', '#' ),
-			'hyphenated_words'        => array( 'foo-bar-baz', '#fooBarBaz' ),
-			'quotes'                  => array( "test'tag", '#testTag' ),
-			'double_quotes'           => array( 'test"tag', '#testTag' ),
-			'ampersand'               => array( 'test&tag', '#testTag' ),
-			'html_entities'           => array( 'test&tag', '#testTag' ),
-			'leading_trailing_spaces' => array( '  test  ', '#Test' ),
-			'multiple_hyphens'        => array( 'test--tag', '#testTag' ),
-			'camelCase_preservation'  => array( 'testTag', '#testTag' ),
-			'with_dots'               => array( 'test.tag', '#testTag' ),
-			'with_commas'             => array( 'test,tag', '#testTag' ),
-			'with_semicolons'         => array( 'test;tag', '#testTag' ),
-			'with_slashes'            => array( 'test/tag', '#testTag' ),
-			'with_backslashes'        => array( 'test\\tag', '#testTag' ),
-			'with_parentheses'        => array( 'test(tag)', '#testTag' ),
-			'with_brackets'           => array( 'test[tag]', '#testTag' ),
-			'with_braces'             => array( 'test{tag}', '#testTag' ),
-			'emoji_mixed'             => array( 'test 😀 tag', '#testTag' ),
-			'chinese_characters'      => array( '测试 标签', '#测试标签' ),
-			'korean_characters'       => array( '테스트 태그', '#테스트태그' ),
-			'greek_characters'        => array( 'δοκιμή', '#δοκιμή' ),
-			'hebrew_characters'       => array( 'בדיקה', '#בדיקה' ),
-			'thai_characters'         => array( 'ทดสอบ', '#ทดสอบ' ),
+	public function test_is_activity_reply_with_in_reply_to() {
+		$activity = array(
+			'type'   => 'Create',
+			'object' => array(
+				'type'      => 'Note',
+				'content'   => 'This is a reply',
+				'inReplyTo' => 'https://example.com/post/123',
+			),
 		);
+
+		$this->assertTrue( \Activitypub\is_activity_reply( $activity ) );
 	}
 
 	/**
-	 * Test esc_hashtag function.
+	 * Test is_activity_reply function with quote-inline pattern.
 	 *
-	 * @dataProvider esc_hashtag_provider
-	 * @covers \Activitypub\esc_hashtag
-	 *
-	 * @param string $input    The input string.
-	 * @param string $expected The expected hashtag output.
+	 * @covers \Activitypub\is_activity_reply
 	 */
-	public function test_esc_hashtag( $input, $expected ) {
-		$result = \Activitypub\esc_hashtag( $input );
-		$this->assertSame( $expected, $result );
+	public function test_is_activity_reply_with_quote_inline() {
+		$activity = array(
+			'type'   => 'Create',
+			'object' => array(
+				'type'    => 'Note',
+				'content' => '<p class="quote-inline">RE: <a href="https://example.com/post">Post</a></p><p>My comment</p>',
+			),
+		);
+
+		$this->assertTrue( \Activitypub\is_activity_reply( $activity ) );
 	}
 
 	/**
-	 * Test esc_hashtag filter hook.
+	 * Test is_activity_reply function with quote-inline (case insensitive).
 	 *
-	 * @covers \Activitypub\esc_hashtag
+	 * @covers \Activitypub\is_activity_reply
 	 */
-	public function test_esc_hashtag_filter() {
-		$filter_callback = function ( $hashtag, $input ) {
-			if ( 'custom' === $input ) {
-				return '#CustomTag';
-			}
-			return $hashtag;
-		};
+	public function test_is_activity_reply_with_quote_inline_case_insensitive() {
+		$activity = array(
+			'type'   => 'Create',
+			'object' => array(
+				'type'    => 'Note',
+				'content' => '<P CLASS="QUOTE-INLINE">re: <A HREF="https://example.com/post">Post</A></P>',
+			),
+		);
 
-		\add_filter( 'activitypub_esc_hashtag', $filter_callback, 10, 2 );
+		$this->assertTrue( \Activitypub\is_activity_reply( $activity ) );
+	}
 
-		$result = \Activitypub\esc_hashtag( 'custom' );
-		$this->assertSame( '#CustomTag', $result );
+	/**
+	 * Test is_activity_reply returns false for non-reply.
+	 *
+	 * @covers \Activitypub\is_activity_reply
+	 */
+	public function test_is_activity_reply_returns_false_for_non_reply() {
+		$activity = array(
+			'type'   => 'Create',
+			'object' => array(
+				'type'    => 'Note',
+				'content' => 'Just a regular post',
+			),
+		);
 
-		\remove_filter( 'activitypub_esc_hashtag', $filter_callback, 10 );
+		$this->assertFalse( \Activitypub\is_activity_reply( $activity ) );
 	}
 
 	/**
-	 * Test esc_hashtag with HTML special characters.
+	 * Test is_activity_reply returns false when content is missing.
 	 *
-	 * @covers \Activitypub\esc_hashtag
+	 * @covers \Activitypub\is_activity_reply
 	 */
-	public function test_esc_hashtag_html_escaping() {
-		$result = \Activitypub\esc_hashtag( '<script>alert("xss")</script>' );
-		$this->assertStringNotContainsString( '<script>', $result );
-		$this->assertStringNotContainsString( 'alert', $result );
-		// The result should be HTML-escaped.
-		$this->assertStringStartsWith( '#', $result );
+	public function test_is_activity_reply_returns_false_without_content() {
+		$activity = array(
+			'type'   => 'Create',
+			'object' => array(
+				'type' => 'Note',
+			),
+		);
+
+		$this->assertFalse( \Activitypub\is_activity_reply( $activity ) );
 	}
 
 	/**
-	 * Test esc_hashtag with quoted strings.
+	 * Test is_activity_reply with quote-inline not at start.
 	 *
-	 * @covers \Activitypub\esc_hashtag
+	 * @covers \Activitypub\is_activity_reply
 	 */
-	public function test_esc_hashtag_with_quotes() {
-		// Test single quotes.
-		$result = \Activitypub\esc_hashtag( "test's tag" );
-		$this->assertSame( '#testSTag', $result );
-
-		// Test double quotes.
-		$result = \Activitypub\esc_hashtag( 'test"s tag' );
-		$this->assertSame( '#testSTag', $result );
-
-		// Test HTML entities for quotes.
-		$result = \Activitypub\esc_hashtag( 'test&#039;s tag' );
-		$this->assertSame( '#testSTag', $result );
+	public function test_is_activity_reply_quote_inline_not_at_start() {
+		$activity = array(
+			'type'   => 'Create',
+			'object' => array(
+				'type'    => 'Note',
+				'content' => '<p>Some intro text</p><p class="quote-inline">RE: <a href="https://example.com/post">Post</a></p>',
+			),
+		);
+
+		// Should return false because quote-inline is not at the start.
+		$this->assertFalse( \Activitypub\is_activity_reply( $activity ) );
 	}
 }