From d16014911bffb0527a2597909d5005f713c5e7b5 Mon Sep 17 00:00:00 2001
From: Jeremy Herve <jeremy@jeremy.hu>
Date: Thu, 11 May 2023 19:53:53 +0200
Subject: [PATCH 1/2] Compat: introduce a conditional to detect ActivityPub
 requests

This conditional could be used within the plugin, but also by third-party plugins, to detect whether a request is an ActivityPub request, without having to manually check for query vars and headers every time.
---
 includes/functions.php | 44 ++++++++++++++++++++++++++++++++++++++++++
 readme.txt             |  1 +
 2 files changed, 45 insertions(+)

diff --git a/includes/functions.php b/includes/functions.php
index 19a3512..f1d6c65 100644
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -228,3 +228,47 @@ function is_tombstone( $wp_error ) {
 
 	return false;
 }
+
+/**
+ * Check if a request is for an ActivityPub request.
+ *
+ * @return bool False by default.
+ */
+function is_activitypub_request() {
+	global $wp_query;
+
+	/*
+	 * ActivityPub requests are currently only made for
+	 * author archives, singular posts, and the homepage.
+	 */
+	if ( ! \is_author() && ! \is_singular() && ! \is_home() ) {
+		return false;
+	}
+
+	// One can trigger an ActivityPub request by adding ?activitypub to the URL.
+	global $wp_query;
+	if ( isset( $wp_query->query_vars['activitypub'] ) ) {
+		return true;
+	}
+
+	/*
+	 * The other (more common) option to make an ActivityPub request
+	 * is to send an Accept header.
+	 */
+	if ( isset( $_SERVER['HTTP_ACCEPT'] ) ) {
+		$accept = $_SERVER['HTTP_ACCEPT'];
+
+		/*
+		 * $accept can be a single value, or a comma separated list of values.
+		 * We want to support both scenarios,
+		 * and return true when the header includes at least one of the following:
+		 * - application/activity+json
+		 * - application/ld+json
+		 */
+		if ( preg_match( '/(application\/(ld\+json|activity\+json))/', $accept ) ) {
+			return true;
+		}
+	}
+
+	return false;
+}
diff --git a/readme.txt b/readme.txt
index 0004235..c08f455 100644
--- a/readme.txt
+++ b/readme.txt
@@ -115,6 +115,7 @@ Project maintained on GitHub at [automattic/wordpress-activitypub](https://githu
 
 = Next =
 
+* Compatibility: add a new conditional, `\Activitypub\is_activitypub_request()`, to allow third-party plugins to detect ActivityPub requests.
 * Compatibility: add hooks to allow modifying images returned in ActivityPub requests.
 * Compatibility: indicate that the plugin is compatible and has been tested with the latest version of WordPress, 6.2.
 

From 0b60944f93a947bbb458e82ad919338166ec087c Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Thu, 11 May 2023 03:05:09 +0000
Subject: [PATCH 2/2] Update dealerdirect/phpcodesniffer-composer-installer
 requirement

Updates the requirements on [dealerdirect/phpcodesniffer-composer-installer](https://github.com/PHPCSStandards/composer-installer) to permit the latest version.
- [Release notes](https://github.com/PHPCSStandards/composer-installer/releases)
- [Changelog](https://github.com/PHPCSStandards/composer-installer/blob/main/.github_changelog_generator)
- [Commits](https://github.com/PHPCSStandards/composer-installer/compare/v0.7.1...v1.0.0)

---
updated-dependencies:
- dependency-name: dealerdirect/phpcodesniffer-composer-installer
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
---
 composer.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/composer.json b/composer.json
index 67bd2d3..b0117c4 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         "squizlabs/php_codesniffer": "3.*",
         "wp-coding-standards/wpcs": "*",
         "yoast/phpunit-polyfills": "^1.0",
-        "dealerdirect/phpcodesniffer-composer-installer": "^0.7.1"
+        "dealerdirect/phpcodesniffer-composer-installer": "^1.0.0"
     },
     "config": {
         "allow-plugins": true