modified file smtp-mailer

wp-content/upgrade-temp-backup/plugins/activitypub/includes/class-mention.php

@@ -0,0 +1,173 @@
+<?php
+namespace Activitypub;
+
+use WP_Error;
+use Activitypub\Webfinger;
+
+/**
+ * ActivityPub Mention Class
+ *
+ * @author Alex Kirk
+ */
+class Mention {
+	/**
+	 * Initialize the class, registering WordPress hooks
+	 */
+	public static function init() {
+		\add_filter( 'the_content', array( self::class, 'the_content' ), 99, 2 );
+		\add_filter( 'activitypub_extract_mentions', array( self::class, 'extract_mentions' ), 99, 2 );
+	}
+
+	/**
+	 * Filter to replace the mentions in the content with links
+	 *
+	 * @param string $the_content the post-content
+	 *
+	 * @return string the filtered post-content
+	 */
+	public static function the_content( $the_content ) {
+		// small protection against execution timeouts: limit to 1 MB
+		if ( mb_strlen( $the_content ) > MB_IN_BYTES ) {
+			return $the_content;
+		}
+		$tag_stack = array();
+		$protected_tags = array(
+			'pre',
+			'code',
+			'textarea',
+			'style',
+			'a',
+		);
+		$content_with_links = '';
+		$in_protected_tag = false;
+		foreach ( wp_html_split( $the_content ) as $chunk ) {
+			if ( preg_match( '#^<!--[\s\S]*-->$#i', $chunk, $m ) ) {
+				$content_with_links .= $chunk;
+				continue;
+			}
+
+			if ( preg_match( '#^<(/)?([a-z-]+)\b[^>]*>$#i', $chunk, $m ) ) {
+				$tag = strtolower( $m[2] );
+				if ( '/' === $m[1] ) {
+					// Closing tag.
+					$i = array_search( $tag, $tag_stack );
+					// We can only remove the tag from the stack if it is in the stack.
+					if ( false !== $i ) {
+						$tag_stack = array_slice( $tag_stack, 0, $i );
+					}
+				} else {
+					// Opening tag, add it to the stack.
+					$tag_stack[] = $tag;
+				}
+
+				// If we're in a protected tag, the tag_stack contains at least one protected tag string.
+				// The protected tag state can only change when we encounter a start or end tag.
+				$in_protected_tag = array_intersect( $tag_stack, $protected_tags );
+
+				// Never inspect tags.
+				$content_with_links .= $chunk;
+				continue;
+			}
+
+			if ( $in_protected_tag ) {
+				// Don't inspect a chunk inside an inspected tag.
+				$content_with_links .= $chunk;
+				continue;
+			}
+
+			// Only reachable when there is no protected tag in the stack.
+			$content_with_links .= \preg_replace_callback( '/@' . ACTIVITYPUB_USERNAME_REGEXP . '/', array( self::class, 'replace_with_links' ), $chunk );
+		}
+
+		return $content_with_links;
+	}
+
+	/**
+	 * A callback for preg_replace to build the user links
+	 *
+	 * @param array $result the preg_match results
+	 *
+	 * @return string the final string
+	 */
+	public static function replace_with_links( $result ) {
+		$metadata = get_remote_metadata_by_actor( $result[0] );
+
+		if ( ! empty( $metadata ) && ! is_wp_error( $metadata ) && ! empty( $metadata['url'] ) ) {
+			$username = ltrim( $result[0], '@' );
+			if ( ! empty( $metadata['name'] ) ) {
+				$username = $metadata['name'];
+			}
+			if ( ! empty( $metadata['preferredUsername'] ) ) {
+				$username = $metadata['preferredUsername'];
+			}
+			return \sprintf( '<a rel="mention" class="u-url mention" href="%s">@<span>%s</span></a>', esc_url( $metadata['url'] ), esc_html( $username ) );
+		}
+
+		return $result[0];
+	}
+
+	/**
+	 * Get the Inboxes for the mentioned Actors
+	 *
+	 * @param array $mentioned The list of Actors that were mentioned
+	 *
+	 * @return array The list of Inboxes
+	 */
+	public static function get_inboxes( $mentioned ) {
+		$inboxes = array();
+
+		foreach ( $mentioned as $actor ) {
+			$inbox = self::get_inbox_by_mentioned_actor( $actor );
+
+			if ( ! is_wp_error( $inbox ) && $inbox ) {
+				$inboxes[] = $inbox;
+			}
+		}
+
+		return $inboxes;
+	}
+
+	/**
+	 * Get the inbox from the Remote-Profile of a mentioned Actor
+	 *
+	 * @param string $actor The Actor-URL
+	 *
+	 * @return string The Inbox-URL
+	 */
+	public static function get_inbox_by_mentioned_actor( $actor ) {
+		$metadata = get_remote_metadata_by_actor( $actor );
+
+		if ( \is_wp_error( $metadata ) ) {
+			return $metadata;
+		}
+
+		if ( isset( $metadata['endpoints'] ) && isset( $metadata['endpoints']['sharedInbox'] ) ) {
+			return $metadata['endpoints']['sharedInbox'];
+		}
+
+		if ( \array_key_exists( 'inbox', $metadata ) ) {
+			return $metadata['inbox'];
+		}
+
+		return new WP_Error( 'activitypub_no_inbox', \__( 'No "Inbox" found', 'activitypub' ), $metadata );
+	}
+
+	/**
+	 * Extract the mentions from the post_content.
+	 *
+	 * @param array  $mentions The already found mentions.
+	 * @param string $post_content The post content.
+	 *
+	 * @return mixed The discovered mentions.
+	 */
+	public static function extract_mentions( $mentions, $post_content ) {
+		\preg_match_all( '/@' . ACTIVITYPUB_USERNAME_REGEXP . '/i', $post_content, $matches );
+		foreach ( $matches[0] as $match ) {
+			$link = Webfinger::resolve( $match );
+			if ( ! is_wp_error( $link ) ) {
+				$mentions[ $match ] = $link;
+			}
+		}
+		return $mentions;
+	}
+}