crates/routes/src/feeds.rs

   1 use actix_web::{error::ErrorBadRequest, *};
   2 use anyhow::anyhow;
   3 use chrono::{DateTime, NaiveDateTime, Utc};
   4 use diesel::PgConnection;
   5 use lemmy_api_common::blocking;
   6 use lemmy_db_queries::{
   7   source::{community::Community_, person::Person_},
   8   Crud,
   9   ListingType,
  10   SortType,
  11 };
  12 use lemmy_db_schema::{
  13   source::{community::Community, local_user::LocalUser, person::Person},
  14   LocalUserId,
  15 };
  16 use lemmy_db_views::{
  17   comment_view::{CommentQueryBuilder, CommentView},
  18   post_view::{PostQueryBuilder, PostView},
  19   site_view::SiteView,
  20 };
  21 use lemmy_db_views_actor::person_mention_view::{PersonMentionQueryBuilder, PersonMentionView};
  22 use lemmy_utils::{
  23   claims::Claims,
  24   settings::structs::Settings,
  25   utils::markdown_to_html,
  26   LemmyError,
  27 };
  28 use lemmy_websocket::LemmyContext;
  29 use rss::{
  30   extension::dublincore::DublinCoreExtensionBuilder,
  31   ChannelBuilder,
  32   GuidBuilder,
  33   Item,
  34   ItemBuilder,
  35 };
  36 use serde::Deserialize;
  37 use std::{collections::HashMap, str::FromStr};
  38 use strum::ParseError;
  39
  40 #[derive(Deserialize)]
  41 struct Params {
  42   sort: Option<String>,
  43 }
  44
  45 enum RequestType {
  46   Community,
  47   User,
  48   Front,
  49   Inbox,
  50 }
  51
  52 pub fn config(cfg: &mut web::ServiceConfig) {
  53   cfg
  54     .route("/feeds/{type}/{name}.xml", web::get().to(get_feed))
  55     .route("/feeds/all.xml", web::get().to(get_all_feed))
  56     .route("/feeds/local.xml", web::get().to(get_local_feed));
  57 }
  58
  59 lazy_static! {
  60   static ref RSS_NAMESPACE: HashMap<String, String> = {
  61     let mut h = HashMap::new();
  62     h.insert(
  63       "dc".to_string(),
  64       rss::extension::dublincore::NAMESPACE.to_string(),
  65     );
  66     h
  67   };
  68 }
  69
  70 async fn get_all_feed(
  71   info: web::Query<Params>,
  72   context: web::Data<LemmyContext>,
  73 ) -> Result<HttpResponse, Error> {
  74   let sort_type = get_sort_type(info).map_err(ErrorBadRequest)?;
  75   Ok(get_feed_data(&context, ListingType::All, sort_type).await?)
  76 }
  77
  78 async fn get_local_feed(
  79   info: web::Query<Params>,
  80   context: web::Data<LemmyContext>,
  81 ) -> Result<HttpResponse, Error> {
  82   let sort_type = get_sort_type(info).map_err(ErrorBadRequest)?;
  83   Ok(get_feed_data(&context, ListingType::Local, sort_type).await?)
  84 }
  85
  86 async fn get_feed_data(
  87   context: &LemmyContext,
  88   listing_type: ListingType,
  89   sort_type: SortType,
  90 ) -> Result<HttpResponse, LemmyError> {
  91   let site_view = blocking(context.pool(), move |conn| SiteView::read(&conn)).await??;
  92
  93   let posts = blocking(context.pool(), move |conn| {
  94     PostQueryBuilder::create(&conn)
  95       .listing_type(listing_type)
  96       .sort(sort_type)
  97       .list()
  98   })
  99   .await??;
 100
 101   let items = create_post_items(posts)?;
 102
 103   let mut channel_builder = ChannelBuilder::default();
 104   channel_builder
 105     .namespaces(RSS_NAMESPACE.to_owned())
 106     .title(&format!(
 107       "{} - {}",
 108       site_view.site.name,
 109       listing_type.to_string()
 110     ))
 111     .link(Settings::get().get_protocol_and_hostname())
 112     .items(items);
 113
 114   if let Some(site_desc) = site_view.site.description {
 115     channel_builder.description(&site_desc);
 116   }
 117
 118   let rss = channel_builder.build().map_err(|e| anyhow!(e))?.to_string();
 119   Ok(
 120     HttpResponse::Ok()
 121       .content_type("application/rss+xml")
 122       .body(rss),
 123   )
 124 }
 125
 126 async fn get_feed(
 127   web::Path((req_type, param)): web::Path<(String, String)>,
 128   info: web::Query<Params>,
 129   context: web::Data<LemmyContext>,
 130 ) -> Result<HttpResponse, Error> {
 131   let sort_type = get_sort_type(info).map_err(ErrorBadRequest)?;
 132
 133   let request_type = match req_type.as_str() {
 134     "u" => RequestType::User,
 135     "c" => RequestType::Community,
 136     "front" => RequestType::Front,
 137     "inbox" => RequestType::Inbox,
 138     _ => return Err(ErrorBadRequest(LemmyError::from(anyhow!("wrong_type")))),
 139   };
 140
 141   let builder = blocking(context.pool(), move |conn| match request_type {
 142     RequestType::User => get_feed_user(conn, &sort_type, param),
 143     RequestType::Community => get_feed_community(conn, &sort_type, param),
 144     RequestType::Front => get_feed_front(conn, &sort_type, param),
 145     RequestType::Inbox => get_feed_inbox(conn, param),
 146   })
 147   .await?
 148   .map_err(ErrorBadRequest)?;
 149
 150   let rss = builder.build().map_err(ErrorBadRequest)?.to_string();
 151
 152   Ok(
 153     HttpResponse::Ok()
 154       .content_type("application/rss+xml")
 155       .body(rss),
 156   )
 157 }
 158
 159 fn get_sort_type(info: web::Query<Params>) -> Result<SortType, ParseError> {
 160   let sort_query = info
 161     .sort
 162     .to_owned()
 163     .unwrap_or_else(|| SortType::Hot.to_string());
 164   SortType::from_str(&sort_query)
 165 }
 166
 167 fn get_feed_user(
 168   conn: &PgConnection,
 169   sort_type: &SortType,
 170   user_name: String,
 171 ) -> Result<ChannelBuilder, LemmyError> {
 172   let site_view = SiteView::read(&conn)?;
 173   let person = Person::find_by_name(&conn, &user_name)?;
 174
 175   let posts = PostQueryBuilder::create(&conn)
 176     .listing_type(ListingType::All)
 177     .sort(*sort_type)
 178     .creator_id(person.id)
 179     .list()?;
 180
 181   let items = create_post_items(posts)?;
 182
 183   let mut channel_builder = ChannelBuilder::default();
 184   channel_builder
 185     .namespaces(RSS_NAMESPACE.to_owned())
 186     .title(&format!("{} - {}", site_view.site.name, person.name))
 187     .link(person.actor_id.to_string())
 188     .items(items);
 189
 190   Ok(channel_builder)
 191 }
 192
 193 fn get_feed_community(
 194   conn: &PgConnection,
 195   sort_type: &SortType,
 196   community_name: String,
 197 ) -> Result<ChannelBuilder, LemmyError> {
 198   let site_view = SiteView::read(&conn)?;
 199   let community = Community::read_from_name(&conn, &community_name)?;
 200
 201   let posts = PostQueryBuilder::create(&conn)
 202     .listing_type(ListingType::All)
 203     .sort(*sort_type)
 204     .community_id(community.id)
 205     .list()?;
 206
 207   let items = create_post_items(posts)?;
 208
 209   let mut channel_builder = ChannelBuilder::default();
 210   channel_builder
 211     .namespaces(RSS_NAMESPACE.to_owned())
 212     .title(&format!("{} - {}", site_view.site.name, community.name))
 213     .link(community.actor_id.to_string())
 214     .items(items);
 215
 216   if let Some(community_desc) = community.description {
 217     channel_builder.description(&community_desc);
 218   }
 219
 220   Ok(channel_builder)
 221 }
 222
 223 fn get_feed_front(
 224   conn: &PgConnection,
 225   sort_type: &SortType,
 226   jwt: String,
 227 ) -> Result<ChannelBuilder, LemmyError> {
 228   let site_view = SiteView::read(&conn)?;
 229   let local_user_id = LocalUserId(Claims::decode(&jwt)?.claims.sub);
 230   let local_user = LocalUser::read(&conn, local_user_id)?;
 231   let person_id = local_user.person_id;
 232   let show_bot_accounts = local_user.show_bot_accounts;
 233   let show_read_posts = local_user.show_read_posts;
 234
 235   let posts = PostQueryBuilder::create(&conn)
 236     .listing_type(ListingType::Subscribed)
 237     .my_person_id(person_id)
 238     .show_bot_accounts(show_bot_accounts)
 239     .show_read_posts(show_read_posts)
 240     .sort(*sort_type)
 241     .list()?;
 242
 243   let items = create_post_items(posts)?;
 244
 245   let mut channel_builder = ChannelBuilder::default();
 246   channel_builder
 247     .namespaces(RSS_NAMESPACE.to_owned())
 248     .title(&format!("{} - Subscribed", site_view.site.name))
 249     .link(Settings::get().get_protocol_and_hostname())
 250     .items(items);
 251
 252   if let Some(site_desc) = site_view.site.description {
 253     channel_builder.description(&site_desc);
 254   }
 255
 256   Ok(channel_builder)
 257 }
 258
 259 fn get_feed_inbox(conn: &PgConnection, jwt: String) -> Result<ChannelBuilder, LemmyError> {
 260   let site_view = SiteView::read(&conn)?;
 261   let local_user_id = LocalUserId(Claims::decode(&jwt)?.claims.sub);
 262   let local_user = LocalUser::read(&conn, local_user_id)?;
 263   let person_id = local_user.person_id;
 264   let show_bot_accounts = local_user.show_bot_accounts;
 265
 266   let sort = SortType::New;
 267
 268   let replies = CommentQueryBuilder::create(&conn)
 269     .recipient_id(person_id)
 270     .my_person_id(person_id)
 271     .show_bot_accounts(show_bot_accounts)
 272     .sort(sort)
 273     .list()?;
 274
 275   let mentions = PersonMentionQueryBuilder::create(&conn)
 276     .recipient_id(person_id)
 277     .my_person_id(person_id)
 278     .sort(sort)
 279     .list()?;
 280
 281   let items = create_reply_and_mention_items(replies, mentions)?;
 282
 283   let mut channel_builder = ChannelBuilder::default();
 284   channel_builder
 285     .namespaces(RSS_NAMESPACE.to_owned())
 286     .title(&format!("{} - Inbox", site_view.site.name))
 287     .link(format!(
 288       "{}/inbox",
 289       Settings::get().get_protocol_and_hostname()
 290     ))
 291     .items(items);
 292
 293   if let Some(site_desc) = site_view.site.description {
 294     channel_builder.description(&site_desc);
 295   }
 296
 297   Ok(channel_builder)
 298 }
 299
 300 fn create_reply_and_mention_items(
 301   replies: Vec<CommentView>,
 302   mentions: Vec<PersonMentionView>,
 303 ) -> Result<Vec<Item>, LemmyError> {
 304   let mut reply_items: Vec<Item> = replies
 305     .iter()
 306     .map(|r| {
 307       let reply_url = format!(
 308         "{}/post/{}/comment/{}",
 309         Settings::get().get_protocol_and_hostname(),
 310         r.post.id,
 311         r.comment.id
 312       );
 313       build_item(
 314         &r.creator.name,
 315         &r.comment.published,
 316         &reply_url,
 317         &r.comment.content,
 318       )
 319     })
 320     .collect::<Result<Vec<Item>, LemmyError>>()?;
 321
 322   let mut mention_items: Vec<Item> = mentions
 323     .iter()
 324     .map(|m| {
 325       let mention_url = format!(
 326         "{}/post/{}/comment/{}",
 327         Settings::get().get_protocol_and_hostname(),
 328         m.post.id,
 329         m.comment.id
 330       );
 331       build_item(
 332         &m.creator.name,
 333         &m.comment.published,
 334         &mention_url,
 335         &m.comment.content,
 336       )
 337     })
 338     .collect::<Result<Vec<Item>, LemmyError>>()?;
 339
 340   reply_items.append(&mut mention_items);
 341   Ok(reply_items)
 342 }
 343
 344 fn build_item(
 345   creator_name: &str,
 346   published: &NaiveDateTime,
 347   url: &str,
 348   content: &str,
 349 ) -> Result<Item, LemmyError> {
 350   let mut i = ItemBuilder::default();
 351   i.title(format!("Reply from {}", creator_name));
 352   let author_url = format!(
 353     "{}/u/{}",
 354     Settings::get().get_protocol_and_hostname(),
 355     creator_name
 356   );
 357   i.author(format!(
 358     "/u/{} <a href=\"{}\">(link)</a>",
 359     creator_name, author_url
 360   ));
 361   let dt = DateTime::<Utc>::from_utc(*published, Utc);
 362   i.pub_date(dt.to_rfc2822());
 363   i.comments(url.to_owned());
 364   let guid = GuidBuilder::default()
 365     .permalink(true)
 366     .value(url)
 367     .build()
 368     .map_err(|e| anyhow!(e))?;
 369   i.guid(guid);
 370   i.link(url.to_owned());
 371   // TODO add images
 372   let html = markdown_to_html(&content.to_string());
 373   i.description(html);
 374   Ok(i.build().map_err(|e| anyhow!(e))?)
 375 }
 376
 377 fn create_post_items(posts: Vec<PostView>) -> Result<Vec<Item>, LemmyError> {
 378   let mut items: Vec<Item> = Vec::new();
 379
 380   for p in posts {
 381     let mut i = ItemBuilder::default();
 382     let mut dc_extension = DublinCoreExtensionBuilder::default();
 383
 384     i.title(p.post.name);
 385
 386     dc_extension.creators(vec![p.creator.actor_id.to_string()]);
 387
 388     let dt = DateTime::<Utc>::from_utc(p.post.published, Utc);
 389     i.pub_date(dt.to_rfc2822());
 390
 391     let post_url = format!(
 392       "{}/post/{}",
 393       Settings::get().get_protocol_and_hostname(),
 394       p.post.id
 395     );
 396     i.link(post_url.to_owned());
 397     i.comments(post_url.to_owned());
 398     let guid = GuidBuilder::default()
 399       .permalink(true)
 400       .value(&post_url)
 401       .build()
 402       .map_err(|e| anyhow!(e))?;
 403     i.guid(guid);
 404
 405     let community_url = format!(
 406       "{}/c/{}",
 407       Settings::get().get_protocol_and_hostname(),
 408       p.community.name
 409     );
 410
 411     // TODO add images
 412     let mut description = format!("submitted by <a href=\"{}\">{}</a> to <a href=\"{}\">{}</a><br>{} points | <a href=\"{}\">{} comments</a>",
 413     p.creator.actor_id,
 414     p.creator.name,
 415     community_url,
 416     p.community.name,
 417     p.counts.score,
 418     post_url,
 419     p.counts.comments);
 420
 421     // If its a url post, add it to the description
 422     if let Some(url) = p.post.url {
 423       let link_html = format!("<br><a href=\"{url}\">{url}</a>", url = url);
 424       description.push_str(&link_html);
 425     }
 426
 427     if let Some(body) = p.post.body {
 428       let html = markdown_to_html(&body);
 429       description.push_str(&html);
 430     }
 431
 432     i.description(description);
 433
 434     i.dublin_core_ext(dc_extension.build().map_err(|e| anyhow!(e))?);
 435     items.push(i.build().map_err(|e| anyhow!(e))?);
 436   }
 437
 438   Ok(items)
 439 }