draft for managing follow requests

- the application actor is managed manually by default
- no admin-options are included yet
- the old new follower table only is used hardcoded by the application actor
- no admin notifications are send yet
- todo: a lot more

activitypub.php

@@ -179,6 +179,14 @@ add_action(
 	0
 );
 
+add_action(
+	'wp_ajax_activitypub_handle_follow_request',
+	function () {
+		$wp_list_table = new \Activitypub\Table\Follow_Requests();
+		$wp_list_table->ajax_response();
+	}
+);
+
 /**
  * `get_plugin_data` wrapper
  *

assets/css/activitypub-admin.css

@@ -197,3 +197,36 @@ input.blog-user-identifier {
 	border-bottom: none;
 	margin-bottom: 0;
 }
+
+.activitypub-settings-label {
+	display: inline-block;
+	padding: .25em .4em;
+	font-size: 85%;
+	font-weight: 700;
+	line-height: 1.25;
+	text-align: center;
+	white-space: nowrap;
+	vertical-align: baseline;
+	border-radius: .25rem;
+}
+
+.activitypub-settings-label-success {
+	color: #fff;
+ 	background-color: #28a745;
+}
+
+.activitypub-settings-label-warning {
+	color: #212529;
+	background-color: #ffc107;
+}
+
+.activitypub-settings-label-danger {
+	color: #fff;
+	background-color: #dc3545;
+}
+
+.activitypub-settings-action-buttons {
+	display: flex;
+    gap: 5px;
+    flex-wrap: nowrap;
+}

assets/js/activitypub-admin.js

@@ -1,4 +1,5 @@
 jQuery( function( $ ) {
+	const { __ } = wp.i18n;
 	// Accordion handling in various areas.
 	$( '.activitypub-settings-accordion' ).on( 'click', '.activitypub-settings-accordion-trigger', function() {
 		var isExpanded = ( 'true' === $( this ).attr( 'aria-expanded' ) );
@@ -17,5 +18,51 @@ jQuery( function( $ ) {
 			$( '.activate-now' ).removeClass( 'thickbox open-plugin-details-modal' );
 		}, 1200 );
 	} );
+	
+	$( '.activitypub-settings-action-buttons' ).on( 'click', '.button', function() {
+		var button = $ (this );
+		var actionValue = button.data('action');
+		window.console.log( actionValue );
+		$.ajax({
+            type: 'POST',
+            url: actionValue,
+            success: function ( response ) {
+				var statusText = button.closest( 'td' ).siblings( '.column-status' ).children( 'span' ).first();
+				if ( 'deleted' === response ) {
+					button.closest( 'tr' ).remove();
+				}
+				if ( 'approved' === response ) {
+					button.parent().find( '[data-action*="follow_action=reject"] ').attr( 'type', 'button' );
+					button.parent().find( '[data-action*="follow_action=delete"]' ).attr( 'type', 'hidden' );
+					statusText.text( __( 'Approved', 'activitypub' ) );
+					statusText.removeClass( 'activitypub-settings-label-danger' );
+					statusText.removeClass( 'activitypub-settings-label-warning' );
+					statusText.addClass( 'activitypub-settings-label-success' );
+				}
+				if ( 'rejected' === response ) {
+					// TODO: clarify this behavior together with Mobilizon and others.
+					button.closest( 'tr' ).remove();
+					// statusText.text( __( 'Rejected', 'activitypub' ) );
+					// statusText.removeClass( 'activitypub-settings-label-success' );
+					// statusText.removeClass( 'activitypub-settings-label-warning' );
+					// statusText.addClass( 'activitypub-settings-label-danger' );
+					// button.parent().find( '[data-action*="follow_action=approve"]' ).attr( 'type', 'button' );
+					// button.parent().find( '[data-action*="follow_action=delete"]' ).attr( 'type', 'button' );
+				}
+				button.attr( 'type', 'hidden' );
+				// Check if table is completely empty.
+				var tbody = button.closest( 'tbody' );
+				if ( 0 == tbody.find( 'tr' ).length ) {
+					var text = __( 'No items found.', 'core' );
+					var newRow = $('<tr>').append($('<td>', { class: 'colspanchange', colspan: 7, text: text }));
+					tbody.append(newRow);
+					tbody.append("Some appended text.");
+				}
+            },
+            error: function ( error ) {
+                // TODO: Handle the error
+            }
+        });
+	} );
 
 } );

includes/class-activity-dispatcher.php

@@ -41,7 +41,7 @@ class Activity_Dispatcher {
 	 * @return void
 	 */
 	public static function send_activity_or_announce( $wp_object, $type ) {
-		// check if a migration is needed before sending new posts
+		// check if a migration is needed before sending new post
 		Migration::maybe_migrate();
 
 		if ( is_user_type_disabled( 'blog' ) ) {
@@ -96,7 +96,7 @@ class Activity_Dispatcher {
 			return;
 		}
 
-		$transformer = Factory::instance()->get_transformer( $wp_object );
+		$transformer = Factory::get_transformer( $wp_object );
 
 		if ( null !== $user_id && Users::APPLICATION_USER_ID !== $user_id ) {
 			$transformer->change_wp_user_id( $user_id );

includes/class-admin.php

@@ -95,7 +95,7 @@ class Admin {
 				\load_template( ACTIVITYPUB_PLUGIN_DIR . 'templates/settings.php' );
 				break;
 			case 'followers':
-				\load_template( ACTIVITYPUB_PLUGIN_DIR . 'templates/blog-user-followers-list.php' );
+				\load_template( ACTIVITYPUB_PLUGIN_DIR . 'templates/admin-followers-list.php' );
 				break;
 			case 'welcome':
 			default:
@@ -300,8 +300,8 @@ class Admin {
 
 	public static function enqueue_scripts( $hook_suffix ) {
 		if ( false !== strpos( $hook_suffix, 'activitypub' ) ) {
-			wp_enqueue_style( 'activitypub-admin-styles', plugins_url( 'assets/css/activitypub-admin.css', ACTIVITYPUB_PLUGIN_FILE ), array(), '1.0.0' );
-			wp_enqueue_script( 'activitypub-admin-styles', plugins_url( 'assets/js/activitypub-admin.js', ACTIVITYPUB_PLUGIN_FILE ), array( 'jquery' ), '1.0.0', false );
+			wp_enqueue_style( 'activitypub-admin-styles', plugins_url( 'assets/css/activitypub-admin.css', ACTIVITYPUB_PLUGIN_FILE ), array(), '1.0.1' );
+			wp_enqueue_script( 'activitypub-admin-styles', plugins_url( 'assets/js/activitypub-admin.js', ACTIVITYPUB_PLUGIN_FILE ), array( 'jquery' ), '1.0.1', false );
 		}
 	}
 }

includes/collection/class-follow-requests.php

@@ -0,0 +1,53 @@
+<?php
+namespace Activitypub\Collection;
+
+use WP_Error;
+use WP_Query;
+use Activitypub\Http;
+use Activitypub\Webfinger;
+use Activitypub\Activity\Base_Object;
+use Activitypub\Model\Follower;
+
+use function Activitypub\is_tombstone;
+use function Activitypub\get_remote_metadata_by_actor;
+
+/**
+ * ActivityPub Follow Requests Collection
+ *
+ * @author André Menrath
+ */
+class Follow_Requests {
+	/**
+	 * Get a follow request together with information from the follower.
+	 *
+	 * @param int $user_id      The ID of the WordPress User
+	 * @param int $follower_id  The follower ID
+	 *
+	 * @return \Activitypub\Model\Follow|null The Follower object or null
+	 */
+	public static function get_follow_requests_for_user( $user_id, $per_page, $page, $args ) {
+		$order   = isset($args['order']) && strtolower($args['order']) === 'asc' ? 'ASC' : 'DESC';
+		$orderby = isset($args['orderby']) ? sanitize_text_field($args['orderby']) : 'published';
+
+		global $wpdb;
+		$follow_requests = $wpdb->get_results(
+			$wpdb->prepare(
+				"SELECT SQL_CALC_FOUND_ROWS follow_request.ID AS id, follow_request.post_date AS published, follow_request.guid, follow_request.post_status AS 'status', follower.post_title AS 'post_title', follower.guid AS follower_guid, follower.id AS follower_id, follower.post_modified AS follower_modified
+				 FROM {$wpdb->posts} AS follow_request
+				 LEFT JOIN {$wpdb->posts} AS follower ON follow_request.post_parent = follower.ID
+				 LEFT JOIN {$wpdb->postmeta} AS meta ON follow_request.ID = meta.post_id
+				 WHERE follow_request.post_type = 'ap_follow_request'
+				 AND meta.meta_key = 'activitypub_user_id'
+				 AND meta.meta_value = %s
+				 ORDER BY {$orderby} {$order}
+				 LIMIT %d OFFSET %d",
+				$user_id,
+				$per_page,
+				0
+			)
+		);
+		$total_items = $wpdb->get_var("SELECT FOUND_ROWS()");
+
+		return compact( 'follow_requests', 'total_items' );
+	}
+}

includes/handler/class-follow.php

@@ -5,6 +5,7 @@ use Activitypub\Http;
 use Activitypub\Activity\Activity;
 use Activitypub\Collection\Users;
 use Activitypub\Collection\Followers;
+use Activitypub\Model\Follow_Request;
 
 /**
  * Handle Follow requests
@@ -20,7 +21,7 @@ class Follow {
 		);
 
 		\add_action(
-			'activitypub_followers_post_follow',
+			'activitypub_send_follow_response',
 			array( self::class, 'send_follow_response' ),
 			10,
 			4
@@ -50,60 +51,42 @@ class Follow {
 			$activity['actor']
 		);
 
-		do_action(
-			'activitypub_followers_post_follow',
-			$activity['actor'],
-			$activity,
-			$user_id,
-			$follower
-		);
-	}
-
-	/**
-	 * Send Accept response
-	 *
-	 * @param string                     $actor    The Actor URL
-	 * @param array                      $object   The Activity object
-	 * @param int                        $user_id  The ID of the WordPress User
-	 * @param Activitypub\Model\Follower $follower The Follower object
-	 *
-	 * @return void
-	 */
-	public static function send_follow_response( $actor, $object, $user_id, $follower ) {
 		if ( \is_wp_error( $follower ) ) {
-			// it is not even possible to send a "Reject" because
+			// it is not even possible to send a "Reject" or "Accept" because
 			// we can not get the Remote-Inbox
 			return;
 		}
+		
+		// save follow request by this follower
+		$follow_request = Follow_Request::save( $follower, $user_id, $activity['id'] );
 
-		// only send minimal data
-		$object = array_intersect_key(
-			$object,
-			array_flip(
-				array(
-					'id',
-					'type',
-					'actor',
-					'object',
-				)
-			)
-		);
+		if ( ! $user->get_manually_approves_followers() ) {
+			$follow_request->accept();
+		}
+	
+	}
 
-		$user = Users::get_by_id( $user_id );
-
-		// get inbox
-		$inbox = $follower->get_shared_inbox();
-
-		// send "Accept" activity
+	/**
+	 * Send Follow response
+	 *
+	 * @param Activitypub\Model\User     $user     The Target Users ActivityPub object
+	 * @param Activitypub\Model\Follower $follower The Followers ActivityPub object
+	 * @param array|object               $object   The ActivityPub follow object
+	 * @param string                     $type     The reponse object type: 'Accept' or 'Reject'
+	 *
+	 * @return void
+	 */
+	public static function send_follow_response( $user, $follower, $object, $type ) {
+		// send activity
 		$activity = new Activity();
-		$activity->set_type( 'Accept' );
+		$activity->set_type( $type );
 		$activity->set_object( $object );
 		$activity->set_actor( $user->get_id() );
-		$activity->set_to( $actor );
-		$activity->set_id( $user->get_id() . '#follow-' . \preg_replace( '~^https?://~', '', $actor ) . '-' . \time() );
+		$activity->set_to( $follower->get_id() );
+		$activity->set_id( $user->get_id() . '#accept-' . \preg_replace( '~^https?://~', '', $follower->get_id() ) . '-' . \time() );
 
 		$activity = $activity->to_json();
 
-		Http::post( $inbox, $activity, $user_id );
+		Http::post( $follower->get_shared_inbox(), $activity, $user->get__id() );
 	}
 }

includes/handler/class-undo.php

@@ -2,7 +2,7 @@
 namespace Activitypub\Handler;
 
 use Activitypub\Collection\Users;
-use Activitypub\Collection\Followers;
+use Activitypub\Model\Follow_Request;
 
 /**
  * Handle Undo requests
@@ -39,9 +39,8 @@ class Undo {
 				return;
 			}
 
-			$user_id = $user->get__id();
-
-			Followers::remove_follower( $user_id, $activity['actor'] );
+			$follow_request = Follow_Request::get_from_array( $activity['object'] );
+			$follow_request->delete();
 		}
 	}
 }

includes/model/class-follow-request.php

@@ -0,0 +1,215 @@
+<?php
+namespace Activitypub\Model;
+
+use WP_Error;
+
+use Activitypub\Activity\Activity;
+use Activitypub\Activity\Base_Object;
+use Activitypub\Collection\Users;
+use Activitypub\Model\Follower;
+use Activitypub\Http;
+
+/**
+ * ActivityPub Follow Class
+ *
+ * This Object represents a Follow object.
+ * There is no direct reference to a WordPress User here.
+ *
+ * @author André Menrath
+ *
+ * @see https://www.w3.org/TR/activitypub/#follow-activity-inbox
+ */
+class Follow_Request extends Base_Object {
+	const FOLLOW_REQUEST_POST_TYPE = 'ap_follow_request';
+
+	/**
+	 * Stores theinternal  WordPress post id of the post of type ap_follow_request
+	 * 
+	 * @var string
+	 */
+	protected $_id;
+
+	/**
+	 * The id/URI of the follower
+	 * @var string
+	 */
+	protected $actor;
+
+	/**
+	 * The internal WordPress post id of the follower
+	 * @var string
+	 */
+	protected $_actor;
+
+	/**
+	 * @param int $id
+	 * @return Follow_Request $follow_request
+	 */
+	public static function get_from_array( $array ) {
+		$follow_request = self::init_from_array( $array );
+		if ( ! self::is_valid( $follow_request ) ) {
+			return;
+		}
+		if ( ! $follow_request->get__id() ) {
+			$follow_request->set__id( self::get_follow_request_id_by_uri( $follow_request->get_id() ) );
+		}
+		return $follow_request;
+	}
+
+	/**
+	 * Retrieve the WordPress post id of the follow request by its id (URI)
+	 */
+	public static function get_follow_request_id_by_uri( $uri ) {
+		global $wpdb;
+    	return $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE guid=%s", esc_sql( $uri ) ) );
+	}
+
+
+	/**
+	 * Check if the follow request is valid which means it fits to the already stored data.
+	 * 
+	 * @param Follow_Request $follow_request The follow request to be checked.
+	 * @return bool Whether the follow request is valid.
+	 */
+	public static function is_valid( $follow_request ) {
+		if ( self::class != get_class( $follow_request ) ) {
+			return false;
+		}
+		if ( 'Follow' != $follow_request->get_type() ) {
+			return false;
+		}
+
+    	$id = self::get_follow_request_id_by_uri( $follow_request->get_id() );
+		if ( ! $id || is_wp_error( $id ) ) {
+			return false;
+		}
+		if ( self::FOLLOW_REQUEST_POST_TYPE != get_post_type( $id) ) {
+			return false;
+		}
+
+		$post = get_post( $id );
+		$follower = get_post_parent( $id );
+		if ( $follower->guid != $follow_request->get_actor() ) {
+			return false;
+		}
+		return true;
+	}
+
+	/**
+	 * @param int $id
+	 * @return Follow_Request $follow_request
+	 */
+	public static function from_wp_id( $id ) {
+		if ( self::FOLLOW_REQUEST_POST_TYPE != get_post_type( $id ) ){
+			return;
+		}
+		$post = get_post( $id );
+
+		$follow_request = new static;
+		$follow_request->set_id( $post->guid );
+		$follow_request->set__id( $post->ID );
+		$follow_request->set_type( 'Follow' );
+
+		return $follow_request;
+	}
+
+	/**
+	 * Save the current Follower-Object.
+	 *
+	 * @param Follower $follower
+	 *
+	 * @return Follow_Request|WP_Error The Follow_Request or an WP_Error.
+	 */
+	public static function save( $follower, $user_id, $activity_id ) {
+		$follower_id = $follower->get__id();
+		$meta_input = array(
+			'activitypub_user_id' => $user_id,
+		);
+
+		$args = array(
+			'guid'         => $activity_id,
+			'post_author'  => 0,
+			'post_type'    => self::FOLLOW_REQUEST_POST_TYPE,
+			'post_status'  => 'pending',
+			'post_parent'  => $follower_id,
+			'meta_input'   => $meta_input,
+			'mime_type'    => 'text/plain'
+		);
+
+		$post_id = wp_insert_post( $args );
+
+
+		return self::from_wp_id( $post_id );
+	}
+
+	/**
+	 * Check if the user is allowed to handle this follow request.
+	 * 
+	 * Usually needed for the ajax functions.
+	 * @return bool Whether the user is allowed.
+	 */
+	public function can_handle_follow_request() {
+		$target_actor = get_post_meta( $this->get__id(), 'activitypub_user_id');
+		if ( get_current_user_id() == $target_actor || current_user_can( 'manage_options' )) {
+			return true;
+		}
+	}
+
+	/**
+	 * Reject the follow request
+	 */
+	public function reject() {
+		wp_update_post( 
+			array(
+				'ID' => $this->get__id(),
+				'post_status' => 'rejected',
+			)
+		);
+		$this->send_response( 'Reject' );
+		$this->delete();
+	}
+
+	/**
+	 * Approve the follow request
+	 */
+	public function approve() {
+		wp_update_post( 
+			array(
+				'ID' => $this->get__id(),
+				'post_status' => 'approved',
+			)
+		);
+		$this->send_response( 'Accept' );
+	}
+
+	/**
+	 * Delete the follow request
+	 * 
+	 * This should only be called after it has been rejected.
+	 */
+	public function delete() {
+		wp_delete_post( $this->get__id() );
+	}
+
+	/**
+	 * Prepere the sending of the follow request response and hand it over to the sending handler.
+	 */
+	public function send_response( $type ) {
+		$user_id = get_post_meta( $this->get__id(), 'activitypub_user_id')[0];
+		$user = Users::get_by_id( $user_id );
+
+		$follower_id = wp_get_post_parent_id( $this->get__id() );
+		$follower = Follower::init_from_cpt( get_post( $follower_id ) );
+		
+		$actor = $follower->get_id();
+
+		$object = array(
+			'id'    => $this->get_id(),
+			'type'  => $this->get_type(),
+			'actor' => $actor,
+			'object' => $user,
+		);
+
+		do_action( 'activitypub_send_follow_response', $user, $follower, $object, $type);
+	}
+}

includes/model/class-follower.php

@@ -19,7 +19,7 @@ use Activitypub\Collection\Followers;
  */
 class Follower extends Actor {
 	/**
-	 * The complete Remote-Profile of the Follower
+	 * The complete Remote-Profile of the Follower.
 	 *
 	 * @var array
 	 */
@@ -34,6 +34,13 @@ class Follower extends Actor {
 		return get_post_meta( $this->_id, 'activitypub_errors' );
 	}
 
+	/**
+	 * Getter function for the internal WordPress id.
+	 */
+	public function get__id() {
+		return $this->_id;
+	}
+																																											
 	/**
 	 * Get the Summary.
 	 *
@@ -304,9 +311,9 @@ class Follower extends Actor {
 	/**
 	 * Convert a Custom-Post-Type input to an Activitypub\Model\Follower.
 	 *
-	 * @return string The JSON string.
+	 * @param WP_Post The JSON string.
 	 *
-	 * @return array Activitypub\Model\Follower
+	 * @return \Activitypub\Model\Follower $object
 	 */
 	public static function init_from_cpt( $post ) {
 		$actor_json = get_post_meta( $post->ID, 'activitypub_actor_json', true );

includes/table/class-follow-requests.php

@@ -0,0 +1,290 @@
+<?php
+namespace Activitypub\Table;
+
+use WP_List_Table;
+use Activitypub\Collection\Users;
+use Activitypub\Collection\Followers as FollowerCollection;
+use Activitypub\Collection\Follow_Requests as FollowerRequestCollection;
+use Activitypub\Model\Follow_Request;
+
+use function Activitypub\object_to_uri;
+
+if ( ! \class_exists( '\WP_List_Table' ) ) {
+		require_once ABSPATH . 'wp-admin/includes/class-wp-list-table.php';
+}
+
+/**
+ * Table that shows all follow requests for a user and allows handling those requests.
+ */
+class Follow_Requests extends WP_List_Table {
+	private $user_id;
+	public $follow_requests_count = 0;
+
+	public function __construct( $user_id = null ) {
+
+		if ( $user_id ) {
+			$this->user_id = $user_id;
+		} else {
+			$this->user_id = \get_current_user_id();
+		}
+
+		parent::__construct(
+			array(
+				'singular' => \__( 'Follower', 'activitypub' ),
+				'plural'   => \__( 'Followers', 'activitypub' ),
+				'ajax'     => true,
+			)
+		);
+	}
+
+	public function get_columns() {
+		return array(
+			'cb'         => '<input type="button">',
+			'action'     => \__( 'Action', 'activitypub' ),
+			'name'       => \__( 'Name', 'activitypub' ),
+			'url'        => \__( 'URL', 'activitypub' ),
+			'status'     => \__( 'Status', 'activitypub' ),
+			'published'  => \__( 'Created', 'activitypub' ),
+			'modified'   => \__( 'Last updated', 'activitypub' ),
+		);
+	}
+
+	public function get_sortable_columns() {
+		$sortable_columns = array(
+			'status' => array( 'status', false),
+			'name' => array( 'name', true ),
+			'modified'   => array( 'modified', false ),
+			'published'  => array( 'published', false ),
+		);
+
+		return $sortable_columns;
+	}
+
+	public function prepare_items() {
+		$columns = $this->get_columns();
+		$hidden  = array();
+
+		$this->process_action();
+		$this->_column_headers = array( $columns, $hidden, $this->get_sortable_columns() );
+
+		$page_num = $this->get_pagenum();
+		$per_page = 20;
+
+		$args = array();
+
+		// phpcs:ignore WordPress.Security.NonceVerification.Recommended
+		if ( isset( $_GET['orderby'] ) ) {
+			// phpcs:ignore WordPress.Security.NonceVerification.Recommended
+			$args['orderby'] = sanitize_text_field( wp_unslash( $_GET['orderby'] ) );
+		}
+
+		// phpcs:ignore WordPress.Security.NonceVerification.Recommended
+		if ( isset( $_GET['order'] ) ) {
+			// phpcs:ignore WordPress.Security.NonceVerification.Recommended
+			$args['order'] = sanitize_text_field( wp_unslash( $_GET['order'] ) );
+		}
+
+		// phpcs:ignore WordPress.Security.NonceVerification.Recommended
+		if ( isset( $_GET['s'] ) && isset( $_REQUEST['_wpnonce'] ) ) {
+			$nonce = sanitize_text_field( wp_unslash( $_REQUEST['_wpnonce'] ) );
+			if ( wp_verify_nonce( $nonce, 'bulk-' . $this->_args['plural'] ) ) {
+				// phpcs:ignore WordPress.Security.NonceVerification.Recommended
+				$args['s'] = sanitize_text_field( wp_unslash( $_GET['s'] ) );
+			}
+		}
+
+		$follow_requests_with_count = FollowerRequestCollection::get_follow_requests_for_user( $this->user_id, $per_page, $page_num, $args );
+
+		$follow_requests = $follow_requests_with_count['follow_requests'];
+		$counter         = $follow_requests_with_count['total_items'];
+		$this->follow_requests_count = $counter;
+
+		$this->items = array();
+		$this->set_pagination_args(
+			array(
+				'total_items' => $counter,
+				'total_pages' => ceil( $counter / $per_page ),
+				'per_page'    => $per_page,
+			)
+		);
+
+		foreach ( $follow_requests as $follow_request ) {
+			$item = array(
+				'status'     => esc_attr( $follow_request->status ),
+				'name'       => esc_attr( $follow_request->post_title ),
+				'url'        => esc_attr( $follow_request->follower_guid ),
+				'guid'       => esc_attr( $follow_request->guid ),
+				'id'         => esc_attr( $follow_request->id ),
+				'published'  => esc_attr( $follow_request->published ),
+				'modified'   => esc_attr( $follow_request->follower_modified ),
+			);
+
+			$this->items[] = $item;
+		}
+	}
+
+	public function get_bulk_actions() {
+		return array(
+			'reject'  => __( 'Reject', 'activitypub' ),
+			'approve' => __( 'Approve', 'activitypub' ),
+		);
+	}
+
+	public function column_default( $item, $column_name ) {
+		if ( ! array_key_exists( $column_name, $item ) ) {
+			return __( 'None', 'activitypub' );
+		}
+		return $item[ $column_name ];
+	}
+
+	public function column_status( $item ) {
+		$status = $item['status'];
+		switch ( $status ) {
+			case 'approved':
+				$color = 'success';
+				break;
+			case 'pending':
+				$color = 'warning';
+				break;
+			case 'rejected':
+				$color = 'danger';
+				break;
+			default:
+				$color = 'warning';
+		}
+		return sprintf(
+			'<span class="activitypub-settings-label activitypub-settings-label-%s">%s</span>',
+			$color,
+			ucfirst( $status )
+		);
+	}
+
+	public function column_avatar( $item ) {
+		return sprintf(
+			'<img src="%s" width="25px;" />',
+			$item['icon']
+		);
+	}
+
+	public function column_url( $item ) {
+		return sprintf(
+			'<a href="%s" target="_blank">%s</a>',
+			$item['url'],
+			$item['url']
+		);
+	}
+
+	public function column_cb( $item ) {
+		return sprintf( '<input type="checkbox" name="follow_requests[]" value="%s" />', esc_attr( $item['id'] ) );
+	}
+
+	public function ajax_response() {
+		$follow_action = $_REQUEST['follow_action'];
+		$id = $_REQUEST['follow_request'];
+		wp_verify_nonce( $_REQUEST['_wpnonce'], "activitypub_{$follow_action}_follow_request" );
+		$follow_request = Follow_Request::from_wp_id( $id );
+		if ( $follow_request->can_handle_follow_request() ) {
+			switch ( $follow_action ) {
+				case 'approve':
+					$follow_request->approve();
+					wp_die( 'approved' );
+				case 'reject':
+					$follow_request->reject();
+					wp_die( 'rejected' );
+				case 'delete':
+					$follow_request->delete();
+					wp_die( 'deleted' );
+			}
+		}
+		return;
+	}
+
+	private static function display_follow_request_action_button( $id, $follow_action, $display = true ) {
+		$url = add_query_arg(
+			array(
+				'follow_request' => $id,
+				'action'         => 'activitypub_handle_follow_request',
+				'follow_action'  => $follow_action,
+				'_wpnonce'       => wp_create_nonce( "activitypub_{$follow_action}_follow_request" ),
+			),
+			admin_url( 'admin-ajax.php' )
+		);
+		if ( $display ) {
+			$type = 'button';
+		} else {
+			$type = 'hidden';
+		}
+		printf(
+			'<input type="%s" class="button" value="%s" data-action="%s">',
+			esc_attr( $type ),
+			esc_attr__( ucfirst( $follow_action ), 'activitypub' ),
+			esc_url( $url )
+		);
+	}
+
+	public function column_action($item) {
+		$status = $item['status'];
+
+		printf('<div class="activitypub-settings-action-buttons">');
+
+		// TODO this can be written smarter, but at least it is readable.
+		if ( 'pending' === $status ) {
+			self::display_follow_request_action_button( $item['id'], 'approve');
+			self::display_follow_request_action_button( $item['id'], 'reject');
+			self::display_follow_request_action_button( $item['id'], 'delete', false);
+		}
+
+		if ( 'approved' === $status ) {
+			self::display_follow_request_action_button( $item['id'], 'approve', false);
+			self::display_follow_request_action_button( $item['id'], 'reject');
+			self::display_follow_request_action_button( $item['id'], 'delete', false);
+		}
+
+		if ( 'rejected' === $status ) {
+			self::display_follow_request_action_button( $item['id'], 'approve', false); // TODO: Clarify with Mobilizon
+			self::display_follow_request_action_button( $item['id'], 'reject', false);
+			self::display_follow_request_action_button( $item['id'], 'delete');
+		}
+
+		printf('</div>');
+	}
+
+	public function process_action() {
+		if ( ! isset( $_REQUEST['follow_requests'] ) || ! isset( $_REQUEST['_wpnonce'] ) ) {
+			return false;
+		}
+		$nonce = sanitize_text_field( wp_unslash( $_REQUEST['_wpnonce'] ) );
+		if ( ! wp_verify_nonce( $nonce, 'bulk-' . $this->_args['plural'] ) ) {
+			return false;
+		}
+
+		if ( ! current_user_can( 'edit_user', $this->user_id ) ) {
+			return false;
+		}
+
+		$follow_requests = $_REQUEST['follow_requests']; // phpcs:ignore
+
+		switch ( $this->current_action() ) {
+			case 'reject':
+				if ( ! is_array( $follow_requests ) ) {
+					$follow_requests = array( $follow_requests );
+				}
+				foreach ( $follow_requests as $follow_request ) {
+					Follow_Request::from_wp_id( $follow_request )->reject();
+				}
+				break;
+			case 'approve':
+				if ( ! is_array( $follow_requests ) ) {
+					$follow_requests = array( $follow_requests );
+				}
+				foreach ( $follow_requests as $follow_request ) {
+					Follow_Request::from_wp_id( $follow_request )->approve();
+				}
+				break;
+		}
+	}
+
+	public function follow_requests_count() {
+		return $this->follow_requests_count;
+	}
+}

includes/table/class-followers.php

@@ -16,7 +16,7 @@ class Followers extends WP_List_Table {
 
 	public function __construct() {
 		if ( get_current_screen()->id === 'settings_page_activitypub' ) {
-			$this->user_id = Users::APPLICATION_USER_ID;
+			$this->user_id = Users::BLOG_USER_ID;
 		} else {
 			$this->user_id = \get_current_user_id();
 		}

templates/admin-followers-list.php

@@ -0,0 +1,57 @@
+<?php
+
+use Activitypub\Collection\Users;
+
+\load_template(
+	__DIR__ . '/admin-header.php',
+	true,
+	array(
+		'settings' => '',
+		'welcome' => '',
+		'followers' => 'active',
+	)
+);
+
+// Draw the follow table for the blog user if it is activated.
+if ( ! \Activitypub\is_user_disabled( \Activitypub\Collection\Users::BLOG_USER_ID ) ) :
+	$table = new \Activitypub\Table\Followers();
+	$follower_count = $table->get_user_count();
+	// translators: The follower count.
+	$followers_template = _n( 'Your blog profile currently has %s follower.', 'Your blog profile currently has %s followers.', $follower_count, 'activitypub' );
+	?>
+	<div class="wrap activitypub-followers-page">
+		<p><?php \printf( \esc_html( $followers_template ), \esc_attr( $follower_count ) ); ?></p>
+	
+		<form method="get">
+			<input type="hidden" name="page" value="activitypub" />
+			<input type="hidden" name="tab" value="followers" />
+			<?php
+			$table->prepare_items();
+			$table->search_box( 'Search', 'search' );
+			$table->display();
+			?>
+			</form>
+	</div>
+	
+<?php endif;
+
+// Draw the the follow table for the application user with reject and accept options.
+$table = new \Activitypub\Table\Follow_Requests( Users::APPLICATION_USER_ID );
+$table->prepare_items();
+$follow_requests_count = $table->follow_requests_count;
+// translators: The follower count.
+$followers_template = _n( 'Your WordPress site currently has %s follow request.', 'Your WordPress site currently has %s follow requests.', $follow_requests_count, 'activitypub' );
+?>
+<div class="wrap activitypub-followers-page">
+	<p><?php \printf( \esc_html( $followers_template ), \esc_attr( $follow_requests_count ) ); ?></p>
+
+	<form method="get">
+		<input type="hidden" name="page" value="activitypub" />
+		<input type="hidden" name="tab" value="followers" />
+		<?php
+		$table->search_box( 'Search', 'search' );
+		$table->display();
+		
+		?>
+		</form>
+</div>

templates/admin-header.php

@@ -15,13 +15,10 @@
 			<?php \esc_html_e( 'Settings', 'activitypub' ); ?>
 		</a>
 
-		<?php if ( ! \Activitypub\is_user_disabled( \Activitypub\Collection\Users::BLOG_USER_ID ) ) : ?>
-
 		<a href="<?php echo \esc_url_raw( admin_url( 'options-general.php?page=activitypub&tab=followers' ) ); ?>" class="activitypub-settings-tab <?php echo \esc_attr( $args['followers'] ); ?>">
 			<?php \esc_html_e( 'Followers', 'activitypub' ); ?>
 		</a>
 
-		<?php endif; ?>
 	</nav>
 </div>
 <hr class="wp-header-end">

templates/blog-user-followers-list.php

@@ -1,28 +0,0 @@
-<?php
-\load_template(
-	__DIR__ . '/admin-header.php',
-	true,
-	array(
-		'settings' => '',
-		'welcome' => '',
-		'followers' => 'active',
-	)
-);
-$table = new \Activitypub\Table\Followers();
-$follower_count = $table->get_user_count();
-// translators: The follower count.
-$followers_template = _n( 'Your blog profile currently has %s follower.', 'Your blog profile currently has %s followers.', $follower_count, 'activitypub' );
-?>
-<div class="wrap activitypub-followers-page">
-	<p><?php \printf( \esc_html( $followers_template ), \esc_attr( $follower_count ) ); ?></p>
-
-	<form method="get">
-		<input type="hidden" name="page" value="activitypub" />
-		<input type="hidden" name="tab" value="followers" />
-		<?php
-		$table->prepare_items();
-		$table->search_box( 'Search', 'search' );
-		$table->display();
-		?>
-		</form>
-</div>