use crate::apub::create_apub_response; use crate::apub::fetcher::{fetch_remote_community, fetch_remote_user}; use crate::convert_datetime; use crate::db::community::Community; use crate::db::post::{Post, PostForm}; use crate::db::user::User_; use crate::db::Crud; use activitystreams::{context, object::properties::ObjectProperties, object::Page}; use actix_web::body::Body; use actix_web::web::Path; use actix_web::{web, HttpResponse}; use diesel::r2d2::{ConnectionManager, Pool}; use diesel::PgConnection; use failure::Error; use serde::Deserialize; use url::Url; #[derive(Deserialize)] pub struct PostQuery { post_id: String, } /// Return the post json over HTTP. pub async fn get_apub_post( info: Path, db: web::Data>>, ) -> Result, Error> { let id = info.post_id.parse::()?; let post = Post::read(&&db.get()?, id)?; Ok(create_apub_response(&post.as_page(&db.get().unwrap())?)) } impl Post { // Turn a Lemmy post into an ActivityPub page that can be sent out over the network. pub fn as_page(&self, conn: &PgConnection) -> Result { let mut page = Page::default(); let oprops: &mut ObjectProperties = page.as_mut(); let creator = User_::read(conn, self.creator_id)?; let community = Community::read(conn, self.community_id)?; oprops // Not needed when the Post is embedded in a collection (like for community outbox) .set_context_xsd_any_uri(context())? .set_id(self.ap_id.to_owned())? // Use summary field to be consistent with mastodon content warning. // https://mastodon.xyz/@Louisa/103987265222901387.json .set_summary_xsd_string(self.name.to_owned())? .set_published(convert_datetime(self.published))? .set_to_xsd_any_uri(community.actor_id)? .set_attributed_to_xsd_any_uri(creator.actor_id)?; if let Some(body) = &self.body { oprops.set_content_xsd_string(body.to_owned())?; } // TODO: hacky code because we get self.url == Some("") // https://github.com/dessalines/lemmy/issues/602 let url = self.url.as_ref().filter(|u| !u.is_empty()); if let Some(u) = url { oprops.set_url_xsd_any_uri(u.to_owned())?; } if let Some(u) = self.updated { oprops.set_updated(convert_datetime(u))?; } Ok(page) } } impl PostForm { /// Parse an ActivityPub page received from another instance into a Lemmy post. pub fn from_page(page: &Page, conn: &PgConnection) -> Result { let oprops = &page.object_props; let creator_id = Url::parse(&oprops.get_attributed_to_xsd_any_uri().unwrap().to_string())?; let creator = fetch_remote_user(&creator_id, conn)?; let community_id = Url::parse(&oprops.get_to_xsd_any_uri().unwrap().to_string())?; let community = fetch_remote_community(&community_id, conn)?; Ok(PostForm { name: oprops.get_summary_xsd_string().unwrap().to_string(), url: oprops.get_url_xsd_any_uri().map(|u| u.to_string()), body: oprops.get_content_xsd_string().map(|c| c.to_string()), creator_id: creator.id, community_id: community.id, removed: None, // -> Delete activity / tombstone locked: None, // -> commentsEnabled published: oprops .get_published() .map(|u| u.as_ref().to_owned().naive_local()), updated: oprops .get_updated() .map(|u| u.as_ref().to_owned().naive_local()), deleted: None, // -> Delete activity / tombstone nsfw: false, // -> sensitive stickied: None, // -> put it in "featured" collection of the community embed_title: None, // -> attachment? embed_description: None, embed_html: None, thumbnail_url: None, ap_id: oprops.get_id().unwrap().to_string(), local: false, }) } }