Federate user deletion (#551)

* Federate user deletion

- When someone deletes their account
- When a local user is banned

Fixes #509

* cargo fmt

src/routes/instance.rs

@@ -8,14 +8,13 @@ use serde_json;
 use validator::{Validate, ValidationErrors};
 
 use inbox;
-use plume_common::activity_pub::inbox::FromId;
+use plume_common::activity_pub::{broadcast, inbox::FromId};
 use plume_models::{
     admin::Admin, comments::Comment, db_conn::DbConn, headers::Headers, instance::*, posts::Post,
     safe_string::SafeString, users::User, Error, PlumeRocket, CONFIG,
 };
 use routes::{errors::ErrorPage, rocket_uri_macro_static_files, Page};
 use template_utils::Ructe;
-use Searcher;
 
 #[get("/")]
 pub fn index(conn: DbConn, user: Option<User>, intl: I18n) -> Result<Ructe, ErrorPage> {
@@ -197,14 +196,20 @@ pub fn admin_users(
 }
 
 #[post("/admin/users/<id>/ban")]
-pub fn ban(
-    _admin: Admin,
-    conn: DbConn,
-    id: i32,
-    searcher: Searcher,
-) -> Result<Redirect, ErrorPage> {
-    if let Ok(u) = User::get(&*conn, id) {
-        u.delete(&*conn, &searcher)?;
+pub fn ban(_admin: Admin, id: i32, rockets: PlumeRocket) -> Result<Redirect, ErrorPage> {
+    if let Ok(u) = User::get(&*rockets.conn, id) {
+        u.delete(&*rockets.conn, &rockets.searcher)?;
+
+        if Instance::get_local(&*rockets.conn)
+            .map(|i| u.instance_id == i.id)
+            .unwrap_or(false)
+        {
+            let target = User::one_by_instance(&*rockets.conn)?;
+            let delete_act = u.delete_activity(&*rockets.conn)?;
+            rockets
+                .worker
+                .execute(move || broadcast(&u, delete_act, target));
+        }
     }
     Ok(Redirect::to(uri!(admin_users: page = _)))
 }

src/routes/user.rs

@@ -394,6 +394,12 @@ pub fn delete(
     if user.id == account.id {
         account.delete(&*rockets.conn, &rockets.searcher)?;
 
+        let target = User::one_by_instance(&*rockets.conn)?;
+        let delete_act = account.delete_activity(&*rockets.conn)?;
+        rockets
+            .worker
+            .execute(move || broadcast(&account, delete_act, target));
+
         if let Some(cookie) = cookies.get_private(AUTH_COOKIE) {
             cookies.remove_private(cookie);
         }