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315 lines
9.8 KiB
Rust
315 lines
9.8 KiB
Rust
use crate::{
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activities::send::generate_activity_id,
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activity_queue::{send_activity_single_dest, send_to_community, send_to_community_followers},
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check_is_apub_id_valid,
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extensions::context::lemmy_context,
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fetcher::{get_or_fetch_and_upsert_actor, person::get_or_fetch_and_upsert_person},
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generate_moderators_url,
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insert_activity,
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ActorType,
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CommunityType,
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};
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use activitystreams::{
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activity::{
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kind::{
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AcceptType,
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AddType,
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AnnounceType,
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BlockType,
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DeleteType,
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LikeType,
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RemoveType,
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UndoType,
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},
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Accept,
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ActorAndObjectRefExt,
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Add,
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Announce,
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Block,
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Delete,
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Follow,
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OptTargetRefExt,
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Remove,
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Undo,
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},
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base::{AnyBase, BaseExt, ExtendsExt},
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object::ObjectExt,
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public,
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};
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use anyhow::Context;
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use itertools::Itertools;
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use lemmy_api_common::blocking;
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use lemmy_db_queries::DbPool;
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use lemmy_db_schema::source::{community::Community, person::Person};
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use lemmy_db_views_actor::community_follower_view::CommunityFollowerView;
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use lemmy_utils::{location_info, settings::structs::Settings, LemmyError};
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use lemmy_websocket::LemmyContext;
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use url::Url;
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#[async_trait::async_trait(?Send)]
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impl ActorType for Community {
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fn is_local(&self) -> bool {
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self.local
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}
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fn actor_id(&self) -> Url {
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self.actor_id.to_owned().into_inner()
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}
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fn public_key(&self) -> Option<String> {
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self.public_key.to_owned()
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}
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fn private_key(&self) -> Option<String> {
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self.private_key.to_owned()
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}
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fn get_shared_inbox_or_inbox_url(&self) -> Url {
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self
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.shared_inbox_url
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.clone()
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.unwrap_or_else(|| self.inbox_url.to_owned())
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.into()
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}
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}
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#[async_trait::async_trait(?Send)]
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impl CommunityType for Community {
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fn followers_url(&self) -> Url {
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self.followers_url.clone().into_inner()
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}
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/// As a local community, accept the follow request from a remote person.
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async fn send_accept_follow(
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&self,
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follow: Follow,
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context: &LemmyContext,
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) -> Result<(), LemmyError> {
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let actor_uri = follow
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.actor()?
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.as_single_xsd_any_uri()
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.context(location_info!())?;
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let person = get_or_fetch_and_upsert_person(actor_uri, context, &mut 0).await?;
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let mut accept = Accept::new(
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self.actor_id.to_owned().into_inner(),
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follow.into_any_base()?,
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);
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accept
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(AcceptType::Accept)?)
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.set_to(person.actor_id());
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send_activity_single_dest(accept, self, person.inbox_url.into(), context).await?;
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Ok(())
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}
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/// If the creator of a community deletes the community, send this to all followers.
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async fn send_delete(&self, context: &LemmyContext) -> Result<(), LemmyError> {
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let mut delete = Delete::new(self.actor_id(), self.actor_id());
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delete
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(DeleteType::Delete)?)
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.set_to(public())
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.set_many_ccs(vec![self.followers_url()]);
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send_to_community_followers(delete, self, None, context).await?;
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Ok(())
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}
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/// If the creator of a community reverts the deletion of a community, send this to all followers.
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async fn send_undo_delete(&self, context: &LemmyContext) -> Result<(), LemmyError> {
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let mut delete = Delete::new(self.actor_id(), self.actor_id());
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delete
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(DeleteType::Delete)?)
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.set_to(public())
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.set_many_ccs(vec![self.followers_url()]);
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let mut undo = Undo::new(self.actor_id(), delete.into_any_base()?);
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undo
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(UndoType::Undo)?)
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.set_to(public())
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.set_many_ccs(vec![self.followers_url()]);
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send_to_community_followers(undo, self, None, context).await?;
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Ok(())
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}
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/// If an admin removes a community, send this to all followers.
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async fn send_remove(&self, context: &LemmyContext) -> Result<(), LemmyError> {
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let mut remove = Remove::new(self.actor_id(), self.actor_id());
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remove
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(RemoveType::Remove)?)
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.set_to(public())
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.set_many_ccs(vec![self.followers_url()]);
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send_to_community_followers(remove, self, None, context).await?;
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Ok(())
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}
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/// If an admin reverts the removal of a community, send this to all followers.
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async fn send_undo_remove(&self, context: &LemmyContext) -> Result<(), LemmyError> {
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let mut remove = Remove::new(self.actor_id(), self.actor_id());
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remove
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(RemoveType::Remove)?)
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.set_to(public())
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.set_many_ccs(vec![self.followers_url()]);
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// Undo that fake activity
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let mut undo = Undo::new(self.actor_id(), remove.into_any_base()?);
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undo
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(LikeType::Like)?)
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.set_to(public())
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.set_many_ccs(vec![self.followers_url()]);
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send_to_community_followers(undo, self, None, context).await?;
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Ok(())
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}
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/// Wraps an activity sent to the community in an announce, and then sends the announce to all
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/// community followers.
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///
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/// If we are announcing a local activity, it hasn't been stored in the database yet, and we need
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/// to do it here, so that it can be fetched by ID. Remote activities are inserted into DB in the
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/// inbox.
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///
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/// If the `object` of the announced activity is an actor, the actor ID needs to be passed as
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/// `object_actor`, so that the announce can be delivered to that user.
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async fn send_announce(
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&self,
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activity: AnyBase,
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object_actor: Option<Url>,
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context: &LemmyContext,
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) -> Result<(), LemmyError> {
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let inner_id = activity.id().context(location_info!())?;
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if inner_id.domain() == Some(&Settings::get().get_hostname_without_port()?) {
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insert_activity(inner_id, activity.clone(), true, false, context.pool()).await?;
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}
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let mut ccs = vec![self.followers_url()];
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let mut object_actor_inbox: Option<Url> = None;
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if let Some(actor_id) = object_actor {
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// Ignore errors, maybe its not actually an actor
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// TODO: should pass the actual request counter in, but that seems complicated
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let actor = get_or_fetch_and_upsert_actor(&actor_id, context, &mut 0)
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.await
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.ok();
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if let Some(actor) = actor {
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ccs.push(actor_id);
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object_actor_inbox = Some(actor.get_shared_inbox_or_inbox_url());
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}
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}
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let mut announce = Announce::new(self.actor_id(), activity);
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announce
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(AnnounceType::Announce)?)
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.set_to(public())
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.set_many_ccs(ccs);
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send_to_community_followers(announce, self, object_actor_inbox, context).await?;
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Ok(())
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}
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/// For a given community, returns the inboxes of all followers.
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async fn get_follower_inboxes(&self, pool: &DbPool) -> Result<Vec<Url>, LemmyError> {
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let id = self.id;
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let follows = blocking(pool, move |conn| {
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CommunityFollowerView::for_community(conn, id)
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})
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.await??;
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let inboxes = follows
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.into_iter()
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.filter(|f| !f.follower.local)
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.map(|f| f.follower.shared_inbox_url.unwrap_or(f.follower.inbox_url))
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.map(|i| i.into_inner())
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.unique()
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// Don't send to blocked instances
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.filter(|inbox| check_is_apub_id_valid(inbox).is_ok())
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.collect();
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Ok(inboxes)
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}
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async fn send_add_mod(
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&self,
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actor: &Person,
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added_mod: Person,
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context: &LemmyContext,
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) -> Result<(), LemmyError> {
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let mut add = Add::new(actor.actor_id(), added_mod.actor_id());
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add
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(AddType::Add)?)
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.set_to(public())
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.set_many_ccs(vec![self.actor_id()])
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.set_target(generate_moderators_url(&self.actor_id)?.into_inner());
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send_to_community(add, actor, self, Some(added_mod.actor_id()), context).await?;
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Ok(())
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}
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async fn send_remove_mod(
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&self,
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actor: &Person,
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removed_mod: Person,
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context: &LemmyContext,
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) -> Result<(), LemmyError> {
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let mut remove = Remove::new(actor.actor_id(), removed_mod.actor_id());
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remove
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(RemoveType::Remove)?)
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.set_to(public())
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.set_many_ccs(vec![self.actor_id()])
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.set_target(generate_moderators_url(&self.actor_id)?.into_inner());
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send_to_community(remove, &actor, self, Some(removed_mod.actor_id()), context).await?;
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Ok(())
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}
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async fn send_block_user(
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&self,
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actor: &Person,
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blocked_user: Person,
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context: &LemmyContext,
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) -> Result<(), LemmyError> {
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let mut block = Block::new(actor.actor_id(), blocked_user.actor_id());
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block
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(BlockType::Block)?)
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.set_to(public())
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.set_many_ccs(vec![self.actor_id()]);
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send_to_community(block, &actor, self, Some(blocked_user.actor_id()), context).await?;
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Ok(())
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}
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async fn send_undo_block_user(
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&self,
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actor: &Person,
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unblocked_user: Person,
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context: &LemmyContext,
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) -> Result<(), LemmyError> {
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let mut block = Block::new(actor.actor_id(), unblocked_user.actor_id());
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block
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(BlockType::Block)?)
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.set_to(public())
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.set_many_ccs(vec![self.actor_id()]);
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// Undo that fake activity
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let mut undo = Undo::new(actor.actor_id(), block.into_any_base()?);
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undo
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.set_many_contexts(lemmy_context()?)
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.set_id(generate_activity_id(UndoType::Undo)?)
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.set_to(public())
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.set_many_ccs(vec![self.actor_id()]);
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send_to_community(undo, &actor, self, Some(unblocked_user.actor_id()), context).await?;
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Ok(())
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}
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}
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