From 1e7bfc8f9d067319a855c08d862cbdf323cb536d Mon Sep 17 00:00:00 2001
From: Matthias Pfefferle <pfefferle@gmail.com>
Date: Fri, 8 Jan 2021 17:43:35 +0100
Subject: [PATCH] JSON representation of blog main page

---
 includes/class-activitypub.php |  4 +-
 templates/blog-json.php        | 92 ++++++++++++++++++++++++++++++++++
 2 files changed, 95 insertions(+), 1 deletion(-)
 create mode 100644 templates/blog-json.php

diff --git a/includes/class-activitypub.php b/includes/class-activitypub.php
index d26e213..c2a068d 100644
--- a/includes/class-activitypub.php
+++ b/includes/class-activitypub.php
@@ -34,7 +34,7 @@ class Activitypub {
 	 * @return string The new path to the JSON template.
 	 */
 	public static function render_json_template( $template ) {
-		if ( ! \is_author() && ! \is_singular() ) {
+		if ( ! \is_author() && ! \is_singular() && ! \is_home() ) {
 			return $template;
 		}
 
@@ -42,6 +42,8 @@ class Activitypub {
 			$json_template = \dirname( __FILE__ ) . '/../templates/author-json.php';
 		} elseif ( \is_singular() ) {
 			$json_template = \dirname( __FILE__ ) . '/../templates/post-json.php';
+		} elseif ( \is_home() ) {
+			$json_template = \dirname( __FILE__ ) . '/../templates/blog-json.php';
 		}
 
 		global $wp_query;
diff --git a/templates/blog-json.php b/templates/blog-json.php
new file mode 100644
index 0000000..6377ab8
--- /dev/null
+++ b/templates/blog-json.php
@@ -0,0 +1,92 @@
+<?php
+$json = new \stdClass();
+
+$json->{'@context'} = \Activitypub\get_context();
+$json->id = \get_home_url( '/' );
+$json->type = 'Organization';
+$json->name = \get_bloginfo( 'name' );
+$json->summary = \html_entity_decode(
+	\get_bloginfo( 'description' ),
+	\ENT_QUOTES,
+	'UTF-8'
+);
+$json->preferredUsername = \get_bloginfo( 'name' ); // phpcs:ignore
+$json->url = \get_home_url( '/' );
+
+if ( \has_site_icon() ) {
+	$json->icon = array(
+		'type' => 'Image',
+		'url'  => \get_site_icon_url( 120 ),
+	);
+}
+
+if ( \has_header_image() ) {
+	$json->image = array(
+		'type' => 'Image',
+		'url'  => \get_header_image(),
+	);
+}
+
+$json->inbox = \get_rest_url( null, "/activitypub/1.0/blog/inbox" );
+$json->outbox = \get_rest_url( null, "/activitypub/1.0/blog/outbox" );
+$json->followers = \get_rest_url( null, "/activitypub/1.0/blog/followers" );
+$json->following = \get_rest_url( null, "/activitypub/1.0/blog/following" );
+
+$json->manuallyApprovesFollowers = \apply_filters( 'activitypub_json_manually_approves_followers', \__return_false() ); // phpcs:ignore
+
+// phpcs:ignore
+$json->publicKey = array(
+	'id' => \get_home_url( '/' ) . '#main-key',
+	'owner' => \get_home_url( '/' ),
+	'publicKeyPem' => \trim(),
+);
+
+$json->tag = array();
+$json->attachment = array();
+
+$json->attachment[] = array(
+	'type' => 'PropertyValue',
+	'name' => \__( 'Blog', 'activitypub' ),
+	'value' => \html_entity_decode(
+		'<a rel="me" title="' . \esc_attr( \home_url( '/' ) ) . '" target="_blank" href="' . \home_url( '/' ) . '">' . \wp_parse_url( \home_url( '/' ), \PHP_URL_HOST ) . '</a>',
+		\ENT_QUOTES,
+		'UTF-8'
+	),
+);
+
+/*
+$json->endpoints = array(
+	'sharedInbox' => \get_rest_url( null, '/activitypub/1.0/inbox' ),
+);
+*/
+
+// filter output
+$json = \apply_filters( 'activitypub_json_blog_array', $json );
+
+/*
+ * Action triggerd prior to the ActivityPub profile being created and sent to the client
+ */
+\do_action( 'activitypub_json_blog_pre' );
+
+$options = 0;
+// JSON_PRETTY_PRINT added in PHP 5.4
+if ( \get_query_var( 'pretty' ) ) {
+	$options |= \JSON_PRETTY_PRINT; // phpcs:ignore
+}
+
+$options |= \JSON_HEX_TAG | \JSON_HEX_AMP | \JSON_HEX_QUOT;
+
+/*
+ * Options to be passed to json_encode()
+ *
+ * @param int $options The current options flags
+ */
+$options = \apply_filters( 'activitypub_json_blog_options', $options );
+
+\header( 'Content-Type: application/activity+json' );
+echo \wp_json_encode( $json, $options );
+
+/*
+ * Action triggerd after the ActivityPub profile has been created and sent to the client
+ */
+\do_action( 'activitypub_json_blog_post' );