Content warnings!

build/editor-plugin/block.json

@@ -0,0 +1,8 @@
+{
+  "name": "editor-plugin",
+  "title": "Editor Plugin: not a block, but block.json is very useful.",
+  "category": "widgets",
+  "icon": "admin-comments",
+  "keywords": [],
+  "editorScript": "file:./plugin.js"
+}

build/editor-plugin/plugin.asset.php

@@ -0,0 +1 @@
+<?php return array('dependencies' => array('react', 'wp-components', 'wp-core-data', 'wp-data', 'wp-editor', 'wp-i18n', 'wp-plugins'), 'version' => '88603987940fec29730d');

includes/activity/class-base-object.php

@@ -30,7 +30,8 @@ class Base_Object {
 	const JSON_LD_CONTEXT = array(
 		'https://www.w3.org/ns/activitystreams',
 		array(
-			'Hashtag' => 'as:Hashtag',
+			'Hashtag'   => 'as:Hashtag',
+			'sensitive' => 'as:sensitive',
 		),
 	);
 
@@ -445,6 +446,17 @@ class Base_Object {
 	 */
 	protected $replies;
 
+	/**
+	 * Used to mark an object as containing sensitive content.
+	 * Mastodon displays a content warning, requiring users to click
+	 * through to view the content.
+	 *
+	 * @see https://docs.joinmastodon.org/spec/activitypub/#sensitive
+	 *
+	 * @var boolean
+	 */
+	protected $sensitive = false;
+
 	/**
 	 * Magic function to implement getter and setter
 	 *

includes/class-blocks.php

@@ -14,6 +14,36 @@ public static function init() {
 		\add_action( 'wp_enqueue_scripts', array( self::class, 'add_data' ) );
 		\add_action( 'enqueue_block_editor_assets', array( self::class, 'add_data' ) );
 		\add_action( 'load-post-new.php', array( self::class, 'handle_in_reply_to_get_param' ) );
+		// Add editor plugin
+		\add_action( 'enqueue_block_editor_assets', array( self::class, 'enqueue_editor_assets' ) );
+		\add_action( 'init', array( self::class, 'register_postmeta' ), 11 );
+	}
+
+	public static function register_postmeta() {
+		$ap_post_types = \get_post_types_by_support( 'activitypub' );
+		foreach ( $ap_post_types as $post_type ) {
+			\register_post_meta(
+				$post_type,
+				'activitypub_content_warning',
+				array(
+					'show_in_rest' => true,
+					'single' => true,
+					'type' => 'string',
+				)
+			);
+		}
+	}
+
+	public static function enqueue_editor_assets() {
+		// check for our supported post types
+		$current_screen = \get_current_screen();
+		$ap_post_types  = \get_post_types_by_support( 'activitypub' );
+		if ( ! $current_screen || ! in_array( $current_screen->post_type, $ap_post_types, true ) ) {
+			return;
+		}
+		$asset_data = include ACTIVITYPUB_PLUGIN_DIR . 'build/editor-plugin/plugin.asset.php';
+		$plugin_url = plugins_url( 'build/editor-plugin/plugin.js', ACTIVITYPUB_PLUGIN_FILE );
+		wp_enqueue_script( 'activitypub-block-editor', $plugin_url, $asset_data['dependencies'], $asset_data['version'], true );
 	}
 
 	/**

includes/functions.php

@@ -1177,6 +1177,11 @@ function generate_post_summary( $post, $length = 500 ) {
 		return '';
 	}
 
+	$content_warning = get_content_warning( $post->ID );
+	if ( $content_warning ) {
+		return $content_warning;
+	}
+
 	$content = \sanitize_post_field( 'post_excerpt', $post->post_excerpt, $post->ID );
 
 	if ( $content ) {
@@ -1215,3 +1220,24 @@ function generate_post_summary( $post, $length = 500 ) {
 	*/
 	return $content;
 }
+
+/**
+ * Get the content warning of a post.
+ *
+ * @param int $post_id The post ID.
+ *
+ * @return string|false The content warning or false if not found.
+ */
+function get_content_warning( $post_id ) {
+	$post = get_post( $post_id );
+	if ( ! $post ) {
+		return false;
+	}
+
+	$warning = get_post_meta( $post->ID, 'activitypub_content_warning', true );
+	if ( empty( $warning ) ) {
+		return false;
+	}
+
+	return $warning;
+}

includes/transformer/class-post.php

@@ -14,6 +14,7 @@
 use function Activitypub\get_rest_url_by_path;
 use function Activitypub\is_user_type_disabled;
 use function Activitypub\generate_post_summary;
+use function Activitypub\get_content_warning;
 
 /**
  * WordPress Post Transformer
@@ -87,6 +88,12 @@ public function to_object() {
 			)
 		);
 
+		$content_warning = get_content_warning( $post );
+		if ( ! empty( $content_warning ) ) {
+			$object->set_sensitive( true );
+			$object->set_summary( $content_warning );
+		}
+
 		return $object;
 	}
 

src/editor-plugin/block.json

@@ -0,0 +1,9 @@
+{
+	"name": "editor-plugin",
+	"title": "Editor Plugin: not a block, but block.json is very useful.",
+	"category": "widgets",
+	"icon": "admin-comments",
+	"keywords": [
+	],
+	"editorScript": "file:./plugin.js"
+}

src/editor-plugin/plugin.js

@@ -0,0 +1,33 @@
+import { PluginDocumentSettingPanel } from '@wordpress/editor';
+import { registerPlugin } from '@wordpress/plugins';
+import { TextControl } from '@wordpress/components';
+import { useSelect } from '@wordpress/data';
+import { useEntityProp } from '@wordpress/core-data';
+import { __ } from '@wordpress/i18n';
+
+
+const EditorPlugin = () => {
+	const postType = useSelect(
+		( select ) => select( 'core/editor' ).getCurrentPostType(),
+		[]
+	);
+	const [ meta, setMeta ] = useEntityProp( 'postType', postType, 'meta' );
+
+	return (
+		<PluginDocumentSettingPanel
+			name="activitypub"
+			title={ __( 'Fediverse', 'activitypub' ) }
+		>
+			<TextControl
+				label={ __( 'Content Warning', 'activitypub' ) }
+				value={ meta?.activitypub_content_warning }
+				onChange={ ( value ) => {
+					setMeta( { ...meta, activitypub_content_warning: value } );
+				} }
+				placeholder={ __( 'Optional content warning', 'activitypub' ) }
+			/>
+		</PluginDocumentSettingPanel>
+	);
+}
+
+registerPlugin( 'activitypub-editor-plugin', { render: EditorPlugin } );