use actix_web::{error::ErrorBadRequest, *}; use anyhow::anyhow; use chrono::{DateTime, NaiveDateTime, Utc}; use diesel::PgConnection; use lemmy_api::claims::Claims; use lemmy_db::{ source::{community::Community, user::User_}, views::{ comment_view::{CommentQueryBuilder, CommentView}, post_view::{PostQueryBuilder, PostView}, site_view::SiteView, user_mention_view::{UserMentionQueryBuilder, UserMentionView}, }, ListingType, SortType, }; use lemmy_structs::blocking; use lemmy_utils::{settings::Settings, utils::markdown_to_html, LemmyError}; use lemmy_websocket::LemmyContext; use rss::{ extension::dublincore::DublinCoreExtensionBuilder, ChannelBuilder, GuidBuilder, Item, ItemBuilder, }; use serde::Deserialize; use std::{collections::HashMap, 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)); } lazy_static! { static ref RSS_NAMESPACE: HashMap = { let mut h = HashMap::new(); h.insert( "dc".to_string(), rss::extension::dublincore::NAMESPACE.to_string(), ); h }; } 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?) } 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?) } async fn get_feed_data( context: &LemmyContext, listing_type: ListingType, sort_type: SortType, ) -> Result { let site_view = blocking(context.pool(), move |conn| SiteView::read(&conn)).await??; let listing_type_ = listing_type.clone(); let posts = blocking(context.pool(), move |conn| { PostQueryBuilder::create(&conn, None) .listing_type(&listing_type_) .sort(&sort_type) .list() }) .await??; let items = create_post_items(posts)?; let mut channel_builder = ChannelBuilder::default(); channel_builder .namespaces(RSS_NAMESPACE.to_owned()) .title(&format!( "{} - {}", site_view.site.name, listing_type.to_string() )) .link(Settings::get().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().map_err(|e| anyhow!(e))?.to_string(); Ok( HttpResponse::Ok() .content_type("application/rss+xml") .body(rss), ) } async fn get_feed( web::Path((req_type, param)): web::Path<(String, String)>, info: web::Query, context: web::Data, ) -> Result { let sort_type = get_sort_type(info).map_err(ErrorBadRequest)?; 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 builder = blocking(context.pool(), move |conn| match request_type { RequestType::User => get_feed_user(conn, &sort_type, param), RequestType::Community => get_feed_community(conn, &sort_type, param), RequestType::Front => get_feed_front(conn, &sort_type, param), RequestType::Inbox => get_feed_inbox(conn, param), }) .await? .map_err(ErrorBadRequest)?; let rss = builder.build().map_err(ErrorBadRequest)?.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) } fn get_feed_user( conn: &PgConnection, sort_type: &SortType, user_name: String, ) -> Result { let site_view = SiteView::read(&conn)?; let user = User_::find_by_username(&conn, &user_name)?; let user_url = user.get_profile_url(&Settings::get().hostname); let posts = PostQueryBuilder::create(&conn, None) .listing_type(&ListingType::All) .sort(sort_type) .for_creator_id(user.id) .list()?; let items = create_post_items(posts)?; let mut channel_builder = ChannelBuilder::default(); channel_builder .namespaces(RSS_NAMESPACE.to_owned()) .title(&format!("{} - {}", site_view.site.name, user.name)) .link(user_url) .items(items); Ok(channel_builder) } fn get_feed_community( conn: &PgConnection, sort_type: &SortType, community_name: String, ) -> Result { let site_view = SiteView::read(&conn)?; let community = Community::read_from_name(&conn, &community_name)?; let posts = PostQueryBuilder::create(&conn, None) .listing_type(&ListingType::All) .sort(sort_type) .for_community_id(community.id) .list()?; let items = create_post_items(posts)?; 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) .items(items); if let Some(community_desc) = community.description { channel_builder.description(&community_desc); } Ok(channel_builder) } fn get_feed_front( conn: &PgConnection, sort_type: &SortType, jwt: String, ) -> Result { let site_view = SiteView::read(&conn)?; let user_id = Claims::decode(&jwt)?.claims.id; let posts = PostQueryBuilder::create(&conn, Some(user_id)) .listing_type(&ListingType::Subscribed) .sort(sort_type) .list()?; let items = create_post_items(posts)?; let mut channel_builder = ChannelBuilder::default(); channel_builder .namespaces(RSS_NAMESPACE.to_owned()) .title(&format!("{} - Subscribed", site_view.site.name)) .link(Settings::get().get_protocol_and_hostname()) .items(items); if let Some(site_desc) = site_view.site.description { channel_builder.description(&site_desc); } Ok(channel_builder) } fn get_feed_inbox(conn: &PgConnection, jwt: String) -> Result { let site_view = SiteView::read(&conn)?; let user_id = Claims::decode(&jwt)?.claims.id; let sort = SortType::New; let replies = CommentQueryBuilder::create(&conn, Some(user_id)) .for_recipient_id(user_id) .sort(&sort) .list()?; let mentions = UserMentionQueryBuilder::create(&conn, Some(user_id), user_id) .sort(&sort) .list()?; let items = create_reply_and_mention_items(replies, mentions)?; let mut channel_builder = ChannelBuilder::default(); channel_builder .namespaces(RSS_NAMESPACE.to_owned()) .title(&format!("{} - Inbox", site_view.site.name)) .link(format!( "{}/inbox", Settings::get().get_protocol_and_hostname() )) .items(items); if let Some(site_desc) = site_view.site.description { channel_builder.description(&site_desc); } Ok(channel_builder) } fn create_reply_and_mention_items( replies: Vec, mentions: Vec, ) -> Result, LemmyError> { let mut reply_items: Vec = replies .iter() .map(|r| { let reply_url = format!( "{}/post/{}/comment/{}", Settings::get().get_protocol_and_hostname(), r.post.id, r.comment.id ); build_item( &r.creator.name, &r.comment.published, &reply_url, &r.comment.content, ) }) .collect::, LemmyError>>()?; let mut mention_items: Vec = mentions .iter() .map(|m| { let mention_url = format!( "{}/post/{}/comment/{}", Settings::get().get_protocol_and_hostname(), m.post.id, m.comment.id ); build_item( &m.creator.name, &m.comment.published, &mention_url, &m.comment.content, ) }) .collect::, LemmyError>>()?; reply_items.append(&mut mention_items); Ok(reply_items) } fn build_item( creator_name: &str, published: &NaiveDateTime, url: &str, content: &str, ) -> Result { let mut i = ItemBuilder::default(); i.title(format!("Reply from {}", creator_name)); let author_url = format!( "{}/u/{}", Settings::get().get_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() .map_err(|e| anyhow!(e))?; 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().map_err(|e| anyhow!(e))?) } fn create_post_items(posts: Vec) -> 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_owned()]); let dt = DateTime::::from_utc(p.post.published, Utc); i.pub_date(dt.to_rfc2822()); let post_url = format!( "{}/post/{}", Settings::get().get_protocol_and_hostname(), p.post.id ); i.comments(post_url.to_owned()); let guid = GuidBuilder::default() .permalink(true) .value(&post_url) .build() .map_err(|e| anyhow!(e))?; i.guid(guid); let community_url = format!( "{}/c/{}", Settings::get().get_protocol_and_hostname(), p.community.name ); // TODO: for category we should just put the name of the category, but then we would have // to read each community from the db if let Some(url) = p.post.url { i.link(url); } // 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 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().map_err(|e| anyhow!(e))?); items.push(i.build().map_err(|e| anyhow!(e))?); } Ok(items) }