3 community::announce::AnnouncableActivities,
6 verify_delete_activity,
13 activity_queue::send_to_community_new,
14 extensions::context::lemmy_context,
15 fetcher::object_id::ObjectId,
18 use activitystreams::{
19 activity::kind::DeleteType,
21 primitives::OneOrMany,
25 use lemmy_api_common::blocking;
26 use lemmy_apub_lib::{values::PublicUrl, ActivityFields, ActivityHandler};
27 use lemmy_db_queries::{
28 source::{comment::Comment_, community::Community_, post::Post_},
31 use lemmy_db_schema::source::{
38 ModRemoveCommunityForm,
45 use lemmy_utils::LemmyError;
46 use lemmy_websocket::{
47 send::{send_comment_ws_message_simple, send_community_ws_message, send_post_ws_message},
51 use serde::{Deserialize, Serialize};
52 use serde_with::skip_serializing_none;
55 /// This is very confusing, because there are four distinct cases to handle:
56 /// - user deletes their post
57 /// - user deletes their comment
58 /// - remote community mod deletes local community
59 /// - remote community deletes itself (triggered by a mod)
61 /// TODO: we should probably change how community deletions work to simplify this. Probably by
62 /// wrapping it in an announce just like other activities, instead of having the community send it.
63 #[skip_serializing_none]
64 #[derive(Clone, Debug, Deserialize, Serialize, ActivityFields)]
65 #[serde(rename_all = "camelCase")]
67 actor: ObjectId<Person>,
69 pub(in crate::activities::deletion) object: Url,
70 pub(in crate::activities::deletion) cc: [ObjectId<Community>; 1],
71 #[serde(rename = "type")]
73 /// If summary is present, this is a mod action (Remove in Lemmy terms). Otherwise, its a user
74 /// deleting their own content.
75 pub(in crate::activities::deletion) summary: Option<String>,
77 #[serde(rename = "@context")]
78 context: OneOrMany<AnyBase>,
83 #[async_trait::async_trait(?Send)]
84 impl ActivityHandler for Delete {
87 context: &LemmyContext,
88 request_counter: &mut i32,
89 ) -> Result<(), LemmyError> {
90 verify_activity(self, &context.settings())?;
91 verify_delete_activity(
95 self.summary.is_some(),
105 context: &LemmyContext,
106 request_counter: &mut i32,
107 ) -> Result<(), LemmyError> {
108 if let Some(reason) = self.summary {
109 // We set reason to empty string if it doesn't exist, to distinguish between delete and
110 // remove. Here we change it back to option, so we don't write it to db.
111 let reason = if reason.is_empty() {
116 receive_remove_action(&self.actor, &self.object, reason, context, request_counter).await
118 receive_delete_action(
122 community: UserOperationCrud::DeleteCommunity,
123 post: UserOperationCrud::DeletePost,
124 comment: UserOperationCrud::DeleteComment,
136 pub(in crate::activities::deletion) fn new(
138 community: &Community,
140 summary: Option<String>,
141 context: &LemmyContext,
142 ) -> Result<Delete, LemmyError> {
144 actor: ObjectId::new(actor.actor_id()),
145 to: [PublicUrl::Public],
147 cc: [ObjectId::new(community.actor_id())],
148 kind: DeleteType::Delete,
150 id: generate_activity_id(
152 &context.settings().get_protocol_and_hostname(),
154 context: lemmy_context(),
155 unparsed: Default::default(),
158 pub(in crate::activities::deletion) async fn send(
160 community: &Community,
162 summary: Option<String>,
163 context: &LemmyContext,
164 ) -> Result<(), LemmyError> {
165 let delete = Delete::new(actor, community, object_id, summary, context)?;
166 let delete_id = delete.id.clone();
168 let activity = AnnouncableActivities::Delete(delete);
169 send_to_community_new(activity, &delete_id, actor, community, vec![], context).await
173 pub(in crate::activities) async fn receive_remove_action(
174 actor: &ObjectId<Person>,
176 reason: Option<String>,
177 context: &LemmyContext,
178 request_counter: &mut i32,
179 ) -> Result<(), LemmyError> {
180 let actor = actor.dereference(context, request_counter).await?;
181 use UserOperationCrud::*;
182 match DeletableObjects::read_from_db(object, context).await? {
183 DeletableObjects::Community(community) => {
185 return Err(anyhow!("Only local admin can remove community").into());
187 let form = ModRemoveCommunityForm {
188 mod_person_id: actor.id,
189 community_id: community.id,
194 blocking(context.pool(), move |conn| {
195 ModRemoveCommunity::create(conn, &form)
198 let deleted_community = blocking(context.pool(), move |conn| {
199 Community::update_removed(conn, community.id, true)
203 send_community_ws_message(deleted_community.id, RemoveCommunity, None, None, context).await?;
205 DeletableObjects::Post(post) => {
206 let form = ModRemovePostForm {
207 mod_person_id: actor.id,
212 blocking(context.pool(), move |conn| {
213 ModRemovePost::create(conn, &form)
216 let removed_post = blocking(context.pool(), move |conn| {
217 Post::update_removed(conn, post.id, true)
221 send_post_ws_message(removed_post.id, RemovePost, None, None, context).await?;
223 DeletableObjects::Comment(comment) => {
224 let form = ModRemoveCommentForm {
225 mod_person_id: actor.id,
226 comment_id: comment.id,
230 blocking(context.pool(), move |conn| {
231 ModRemoveComment::create(conn, &form)
234 let removed_comment = blocking(context.pool(), move |conn| {
235 Comment::update_removed(conn, comment.id, true)
239 send_comment_ws_message_simple(removed_comment.id, RemoveComment, context).await?;