lemmy/crates/apub/src/activities/post/create_or_update.rs

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4.8 KiB
Rust
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use crate::{
activities::{
check_community_deleted_or_removed,
community::{announce::AnnouncableActivities, send_to_community},
generate_activity_id,
verify_activity,
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verify_mod_action,
verify_person_in_community,
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CreateOrUpdateType,
},
context::lemmy_context,
fetcher::object_id::ObjectId,
objects::{
community::ApubCommunity,
person::ApubPerson,
post::{ApubPost, Page},
},
};
use activitystreams::{base::AnyBase, primitives::OneOrMany, unparsed::Unparsed};
use anyhow::anyhow;
use lemmy_api_common::blocking;
use lemmy_apub_lib::{
data::Data,
traits::{ActivityFields, ActivityHandler, ActorType, FromApub, ToApub},
values::PublicUrl,
verify::{verify_domains_match, verify_urls_match},
};
use lemmy_db_schema::{source::community::Community, traits::Crud};
use lemmy_utils::LemmyError;
use lemmy_websocket::{send::send_post_ws_message, LemmyContext, UserOperationCrud};
use serde::{Deserialize, Serialize};
use url::Url;
#[derive(Clone, Debug, Deserialize, Serialize, ActivityFields)]
#[serde(rename_all = "camelCase")]
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pub struct CreateOrUpdatePost {
actor: ObjectId<ApubPerson>,
to: [PublicUrl; 1],
object: Page,
cc: [ObjectId<ApubCommunity>; 1],
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#[serde(rename = "type")]
kind: CreateOrUpdateType,
id: Url,
#[serde(rename = "@context")]
context: OneOrMany<AnyBase>,
#[serde(flatten)]
unparsed: Unparsed,
}
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impl CreateOrUpdatePost {
pub async fn send(
post: &ApubPost,
actor: &ApubPerson,
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kind: CreateOrUpdateType,
context: &LemmyContext,
) -> Result<(), LemmyError> {
let community_id = post.community_id;
let community: ApubCommunity = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??
.into();
let id = generate_activity_id(
kind.clone(),
&context.settings().get_protocol_and_hostname(),
)?;
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let create_or_update = CreateOrUpdatePost {
actor: ObjectId::new(actor.actor_id()),
to: [PublicUrl::Public],
object: post.to_apub(context.pool()).await?,
cc: [ObjectId::new(community.actor_id())],
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kind,
id: id.clone(),
context: lemmy_context(),
unparsed: Default::default(),
};
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let activity = AnnouncableActivities::CreateOrUpdatePost(Box::new(create_or_update));
send_to_community(activity, &id, actor, &community, vec![], context).await
}
}
#[async_trait::async_trait(?Send)]
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impl ActivityHandler for CreateOrUpdatePost {
type DataType = LemmyContext;
async fn verify(
&self,
context: &Data<LemmyContext>,
request_counter: &mut i32,
) -> Result<(), LemmyError> {
verify_activity(self, &context.settings())?;
let community = self.cc[0].dereference(context, request_counter).await?;
verify_person_in_community(&self.actor, &self.cc[0], context, request_counter).await?;
check_community_deleted_or_removed(&community)?;
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match self.kind {
CreateOrUpdateType::Create => {
verify_domains_match(self.actor.inner(), self.object.id_unchecked())?;
verify_urls_match(self.actor(), self.object.attributed_to.inner())?;
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// Check that the post isnt locked or stickied, as that isnt possible for newly created posts.
// However, when fetching a remote post we generate a new create activity with the current
// locked/stickied value, so this check may fail. So only check if its a local community,
// because then we will definitely receive all create and update activities separately.
let is_stickied_or_locked =
self.object.stickied == Some(true) || self.object.comments_enabled == Some(false);
if community.local && is_stickied_or_locked {
return Err(anyhow!("New post cannot be stickied or locked").into());
}
}
CreateOrUpdateType::Update => {
let is_mod_action = self.object.is_mod_action(context).await?;
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if is_mod_action {
verify_mod_action(&self.actor, &self.cc[0], context, request_counter).await?;
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} else {
verify_domains_match(self.actor.inner(), self.object.id_unchecked())?;
verify_urls_match(self.actor(), self.object.attributed_to.inner())?;
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}
}
}
self.object.verify(context, request_counter).await?;
Ok(())
}
async fn receive(
self,
context: &Data<LemmyContext>,
request_counter: &mut i32,
) -> Result<(), LemmyError> {
let actor = self.actor.dereference(context, request_counter).await?;
let post =
ApubPost::from_apub(&self.object, context, &actor.actor_id(), request_counter).await?;
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let notif_type = match self.kind {
CreateOrUpdateType::Create => UserOperationCrud::CreatePost,
CreateOrUpdateType::Update => UserOperationCrud::EditPost,
};
send_post_ws_message(post.id, notif_type, None, None, context).await?;
Ok(())
}
}