use actix_web::{error::ErrorBadRequest, *}; use anyhow::anyhow; use chrono::{DateTime, NaiveDateTime, Utc}; use diesel::PgConnection; use lemmy_api_common::blocking; use lemmy_db_schema::{ newtypes::LocalUserId, source::{community::Community, local_user::LocalUser, person::Person}, traits::{ApubActor, Crud}, ListingType, SortType, }; use lemmy_db_views::{ comment_view::{CommentQueryBuilder, CommentView}, post_view::{PostQueryBuilder, PostView}, site_view::SiteView, }; use lemmy_db_views_actor::person_mention_view::{PersonMentionQueryBuilder, PersonMentionView}; use lemmy_utils::{claims::Claims, utils::markdown_to_html, LemmyError}; use lemmy_websocket::LemmyContext; use once_cell::sync::Lazy; use rss::{ extension::dublincore::DublinCoreExtensionBuilder, ChannelBuilder, GuidBuilder, Item, ItemBuilder, }; use serde::Deserialize; use std::{collections::BTreeMap, str::FromStr}; use strum::ParseError; #[derive(Deserialize)] struct Params { sort: Option, } enum RequestType { Community, User, Front, Inbox, } pub fn config(cfg: &mut web::ServiceConfig) { cfg .route("/feeds/{type}/{name}.xml", web::get().to(get_feed)) .route("/feeds/all.xml", web::get().to(get_all_feed)) .route("/feeds/local.xml", web::get().to(get_local_feed)); } static RSS_NAMESPACE: Lazy> = Lazy::new(|| { let mut h = BTreeMap::new(); h.insert( "dc".to_string(), rss::extension::dublincore::NAMESPACE.to_string(), ); h }); #[tracing::instrument(skip_all)] async fn get_all_feed( info: web::Query, context: web::Data, ) -> Result { let sort_type = get_sort_type(info).map_err(ErrorBadRequest)?; Ok(get_feed_data(&context, ListingType::All, sort_type).await?) } #[tracing::instrument(skip_all)] async fn get_local_feed( info: web::Query, context: web::Data, ) -> Result { let sort_type = get_sort_type(info).map_err(ErrorBadRequest)?; Ok(get_feed_data(&context, ListingType::Local, sort_type).await?) } #[tracing::instrument(skip_all)] async fn get_feed_data( context: &LemmyContext, listing_type: ListingType, sort_type: SortType, ) -> Result { let site_view = blocking(context.pool(), SiteView::read).await??; let posts = blocking(context.pool(), move |conn| { PostQueryBuilder::create(conn) .listing_type(listing_type) .sort(sort_type) .list() }) .await??; let items = create_post_items(posts, &context.settings().get_protocol_and_hostname())?; let mut channel_builder = ChannelBuilder::default(); channel_builder .namespaces(RSS_NAMESPACE.to_owned()) .title(&format!("{} - {}", site_view.site.name, listing_type)) .link(context.settings().get_protocol_and_hostname()) .items(items); if let Some(site_desc) = site_view.site.description { channel_builder.description(&site_desc); } let rss = channel_builder.build().to_string(); Ok( HttpResponse::Ok() .content_type("application/rss+xml") .body(rss), ) } #[tracing::instrument(skip_all)] async fn get_feed( req: HttpRequest, info: web::Query, context: web::Data, ) -> Result { let sort_type = get_sort_type(info).map_err(ErrorBadRequest)?; let req_type: String = req.match_info().get("type").unwrap_or("none").parse()?; let param: String = req.match_info().get("name").unwrap_or("none").parse()?; let request_type = match req_type.as_str() { "u" => RequestType::User, "c" => RequestType::Community, "front" => RequestType::Front, "inbox" => RequestType::Inbox, _ => return Err(ErrorBadRequest(LemmyError::from(anyhow!("wrong_type")))), }; let jwt_secret = context.secret().jwt_secret.to_owned(); let protocol_and_hostname = context.settings().get_protocol_and_hostname(); let builder = blocking(context.pool(), move |conn| match request_type { RequestType::User => get_feed_user(conn, &sort_type, ¶m, &protocol_and_hostname), RequestType::Community => get_feed_community(conn, &sort_type, ¶m, &protocol_and_hostname), RequestType::Front => get_feed_front( conn, &jwt_secret, &sort_type, ¶m, &protocol_and_hostname, ), RequestType::Inbox => get_feed_inbox(conn, &jwt_secret, ¶m, &protocol_and_hostname), }) .await? .map_err(ErrorBadRequest)?; let rss = builder.build().to_string(); Ok( HttpResponse::Ok() .content_type("application/rss+xml") .body(rss), ) } fn get_sort_type(info: web::Query) -> Result { let sort_query = info .sort .to_owned() .unwrap_or_else(|| SortType::Hot.to_string()); SortType::from_str(&sort_query) } #[tracing::instrument(skip_all)] fn get_feed_user( conn: &PgConnection, sort_type: &SortType, user_name: &str, protocol_and_hostname: &str, ) -> Result { let site_view = SiteView::read(conn)?; let person = Person::read_from_name(conn, user_name)?; let posts = PostQueryBuilder::create(conn) .listing_type(ListingType::All) .sort(*sort_type) .creator_id(person.id) .list()?; let items = create_post_items(posts, protocol_and_hostname)?; let mut channel_builder = ChannelBuilder::default(); channel_builder .namespaces(RSS_NAMESPACE.to_owned()) .title(&format!("{} - {}", site_view.site.name, person.name)) .link(person.actor_id.to_string()) .items(items); Ok(channel_builder) } #[tracing::instrument(skip_all)] fn get_feed_community( conn: &PgConnection, sort_type: &SortType, community_name: &str, protocol_and_hostname: &str, ) -> Result { let site_view = SiteView::read(conn)?; let community = Community::read_from_name(conn, community_name)?; let posts = PostQueryBuilder::create(conn) .listing_type(ListingType::Community) .sort(*sort_type) .community_id(community.id) .list()?; let items = create_post_items(posts, protocol_and_hostname)?; let mut channel_builder = ChannelBuilder::default(); channel_builder .namespaces(RSS_NAMESPACE.to_owned()) .title(&format!("{} - {}", site_view.site.name, community.name)) .link(community.actor_id.to_string()) .items(items); if let Some(community_desc) = community.description { channel_builder.description(&community_desc); } Ok(channel_builder) } #[tracing::instrument(skip_all)] fn get_feed_front( conn: &PgConnection, jwt_secret: &str, sort_type: &SortType, jwt: &str, protocol_and_hostname: &str, ) -> Result { let site_view = SiteView::read(conn)?; let local_user_id = LocalUserId(Claims::decode(jwt, jwt_secret)?.claims.sub); let local_user = LocalUser::read(conn, local_user_id)?; let posts = PostQueryBuilder::create(conn) .listing_type(ListingType::Subscribed) .my_person_id(local_user.person_id) .show_bot_accounts(local_user.show_bot_accounts) .show_read_posts(local_user.show_read_posts) .sort(*sort_type) .list()?; let items = create_post_items(posts, protocol_and_hostname)?; let mut channel_builder = ChannelBuilder::default(); channel_builder .namespaces(RSS_NAMESPACE.to_owned()) .title(&format!("{} - Subscribed", site_view.site.name)) .link(protocol_and_hostname) .items(items); if let Some(site_desc) = site_view.site.description { channel_builder.description(&site_desc); } Ok(channel_builder) } #[tracing::instrument(skip_all)] fn get_feed_inbox( conn: &PgConnection, jwt_secret: &str, jwt: &str, protocol_and_hostname: &str, ) -> Result { let site_view = SiteView::read(conn)?; let local_user_id = LocalUserId(Claims::decode(jwt, jwt_secret)?.claims.sub); let local_user = LocalUser::read(conn, local_user_id)?; let person_id = local_user.person_id; let show_bot_accounts = local_user.show_bot_accounts; let sort = SortType::New; let replies = CommentQueryBuilder::create(conn) .recipient_id(person_id) .my_person_id(person_id) .show_bot_accounts(show_bot_accounts) .sort(sort) .list()?; let mentions = PersonMentionQueryBuilder::create(conn) .recipient_id(person_id) .my_person_id(person_id) .sort(sort) .list()?; let items = create_reply_and_mention_items(replies, mentions, protocol_and_hostname)?; let mut channel_builder = ChannelBuilder::default(); channel_builder .namespaces(RSS_NAMESPACE.to_owned()) .title(&format!("{} - Inbox", site_view.site.name)) .link(format!("{}/inbox", protocol_and_hostname,)) .items(items); if let Some(site_desc) = site_view.site.description { channel_builder.description(&site_desc); } Ok(channel_builder) } #[tracing::instrument(skip_all)] fn create_reply_and_mention_items( replies: Vec, mentions: Vec, protocol_and_hostname: &str, ) -> Result, LemmyError> { let mut reply_items: Vec = replies .iter() .map(|r| { let reply_url = format!( "{}/post/{}/comment/{}", protocol_and_hostname, r.post.id, r.comment.id ); build_item( &r.creator.name, &r.comment.published, &reply_url, &r.comment.content, protocol_and_hostname, ) }) .collect::, LemmyError>>()?; let mut mention_items: Vec = mentions .iter() .map(|m| { let mention_url = format!( "{}/post/{}/comment/{}", protocol_and_hostname, m.post.id, m.comment.id ); build_item( &m.creator.name, &m.comment.published, &mention_url, &m.comment.content, protocol_and_hostname, ) }) .collect::, LemmyError>>()?; reply_items.append(&mut mention_items); Ok(reply_items) } #[tracing::instrument(skip_all)] fn build_item( creator_name: &str, published: &NaiveDateTime, url: &str, content: &str, protocol_and_hostname: &str, ) -> Result { let mut i = ItemBuilder::default(); i.title(format!("Reply from {}", creator_name)); let author_url = format!("{}/u/{}", protocol_and_hostname, creator_name); i.author(format!( "/u/{} (link)", creator_name, author_url )); let dt = DateTime::::from_utc(*published, Utc); i.pub_date(dt.to_rfc2822()); i.comments(url.to_owned()); let guid = GuidBuilder::default().permalink(true).value(url).build(); i.guid(guid); i.link(url.to_owned()); // TODO add images let html = markdown_to_html(&content.to_string()); i.description(html); Ok(i.build()) } #[tracing::instrument(skip_all)] fn create_post_items( posts: Vec, protocol_and_hostname: &str, ) -> Result, LemmyError> { let mut items: Vec = Vec::new(); for p in posts { let mut i = ItemBuilder::default(); let mut dc_extension = DublinCoreExtensionBuilder::default(); i.title(p.post.name); dc_extension.creators(vec![p.creator.actor_id.to_string()]); let dt = DateTime::::from_utc(p.post.published, Utc); i.pub_date(dt.to_rfc2822()); let post_url = format!("{}/post/{}", protocol_and_hostname, p.post.id); i.link(post_url.to_owned()); i.comments(post_url.to_owned()); let guid = GuidBuilder::default() .permalink(true) .value(&post_url) .build(); i.guid(guid); let community_url = format!("{}/c/{}", protocol_and_hostname, p.community.name); // TODO add images let mut description = format!("submitted by {} to {}
{} points | {} comments", p.creator.actor_id, p.creator.name, community_url, p.community.name, p.counts.score, post_url, p.counts.comments); // If its a url post, add it to the description if let Some(url) = p.post.url { let link_html = format!("
{url}", url = url); description.push_str(&link_html); } if let Some(body) = p.post.body { let html = markdown_to_html(&body); description.push_str(&html); } i.description(description); i.dublin_core_ext(dc_extension.build()); items.push(i.build()); } Ok(items) }