2 activities::{verify_is_public, verify_person_in_community},
3 fetcher::object_id::ObjectId,
5 community::ApubCommunity,
12 use activitystreams::{
13 object::kind::{ImageType, PageType},
18 use chrono::{DateTime, FixedOffset, NaiveDateTime};
19 use lemmy_api_common::blocking;
22 values::{MediaTypeHtml, MediaTypeMarkdown},
23 verify::verify_domains_match,
25 use lemmy_db_schema::{
30 post::{Post, PostForm},
35 request::fetch_site_data,
36 utils::{check_slurs, convert_datetime, markdown_to_html, remove_slurs},
39 use lemmy_websocket::LemmyContext;
40 use serde::{Deserialize, Serialize};
41 use serde_with::skip_serializing_none;
45 #[skip_serializing_none]
46 #[derive(Clone, Debug, Deserialize, Serialize)]
47 #[serde(rename_all = "camelCase")]
51 pub(crate) attributed_to: ObjectId<ApubPerson>,
54 content: Option<String>,
55 media_type: Option<MediaTypeHtml>,
56 source: Option<Source>,
58 image: Option<ImageObject>,
59 pub(crate) comments_enabled: Option<bool>,
60 sensitive: Option<bool>,
61 pub(crate) stickied: Option<bool>,
62 published: Option<DateTime<FixedOffset>>,
63 updated: Option<DateTime<FixedOffset>>,
69 pub(crate) fn id_unchecked(&self) -> &Url {
72 pub(crate) fn id(&self, expected_domain: &Url) -> Result<&Url, LemmyError> {
73 verify_domains_match(&self.id, expected_domain)?;
77 /// Only mods can change the post's stickied/locked status. So if either of these is changed from
78 /// the current value, it is a mod action and needs to be verified as such.
80 /// Both stickied and locked need to be false on a newly created post (verified in [[CreatePost]].
81 pub(crate) async fn is_mod_action(&self, context: &LemmyContext) -> Result<bool, LemmyError> {
82 let old_post = ObjectId::<ApubPost>::new(self.id.clone())
83 .dereference_local(context)
86 let is_mod_action = if let Ok(old_post) = old_post {
87 self.stickied != Some(old_post.stickied) || self.comments_enabled != Some(!old_post.locked)
94 pub(crate) async fn verify(
96 context: &LemmyContext,
97 request_counter: &mut i32,
98 ) -> Result<(), LemmyError> {
99 let community = self.extract_community(context, request_counter).await?;
101 check_slurs(&self.name, &context.settings().slur_regex())?;
102 verify_domains_match(self.attributed_to.inner(), &self.id.clone())?;
103 verify_person_in_community(&self.attributed_to, &community, context, request_counter).await?;
104 verify_is_public(&self.to.clone())?;
108 pub(crate) async fn extract_community(
110 context: &LemmyContext,
111 request_counter: &mut i32,
112 ) -> Result<ApubCommunity, LemmyError> {
113 let mut to_iter = self.to.iter();
115 if let Some(cid) = to_iter.next() {
116 let cid = ObjectId::new(cid.clone());
117 if let Ok(c) = cid.dereference(context, request_counter).await {
121 return Err(anyhow!("No community found in cc").into());
127 #[derive(Clone, Debug)]
128 pub struct ApubPost(Post);
130 impl Deref for ApubPost {
132 fn deref(&self) -> &Self::Target {
137 impl From<Post> for ApubPost {
138 fn from(p: Post) -> Self {
143 #[async_trait::async_trait(?Send)]
144 impl ApubObject for ApubPost {
145 type DataType = LemmyContext;
146 type ApubType = Page;
147 type TombstoneType = Tombstone;
149 fn last_refreshed_at(&self) -> Option<NaiveDateTime> {
153 async fn read_from_apub_id(
155 context: &LemmyContext,
156 ) -> Result<Option<Self>, LemmyError> {
158 blocking(context.pool(), move |conn| {
159 Post::read_from_apub_id(conn, object_id)
166 async fn delete(self, context: &LemmyContext) -> Result<(), LemmyError> {
167 blocking(context.pool(), move |conn| {
168 Post::update_deleted(conn, self.id, true)
174 // Turn a Lemmy post into an ActivityPub page that can be sent out over the network.
175 async fn to_apub(&self, context: &LemmyContext) -> Result<Page, LemmyError> {
176 let creator_id = self.creator_id;
177 let creator = blocking(context.pool(), move |conn| Person::read(conn, creator_id)).await??;
178 let community_id = self.community_id;
179 let community = blocking(context.pool(), move |conn| {
180 Community::read(conn, community_id)
184 let source = self.body.clone().map(|body| Source {
186 media_type: MediaTypeMarkdown::Markdown,
188 let image = self.thumbnail_url.clone().map(|thumb| ImageObject {
189 kind: ImageType::Image,
194 r#type: PageType::Page,
195 id: self.ap_id.clone().into(),
196 attributed_to: ObjectId::new(creator.actor_id),
197 to: vec![community.actor_id.into(), public()],
198 name: self.name.clone(),
199 content: self.body.as_ref().map(|b| markdown_to_html(b)),
200 media_type: Some(MediaTypeHtml::Html),
202 url: self.url.clone().map(|u| u.into()),
204 comments_enabled: Some(!self.locked),
205 sensitive: Some(self.nsfw),
206 stickied: Some(self.stickied),
207 published: Some(convert_datetime(self.published)),
208 updated: self.updated.map(convert_datetime),
209 unparsed: Default::default(),
214 fn to_tombstone(&self) -> Result<Tombstone, LemmyError> {
217 self.updated.unwrap_or(self.published),
223 context: &LemmyContext,
224 expected_domain: &Url,
225 request_counter: &mut i32,
226 ) -> Result<ApubPost, LemmyError> {
227 // We can't verify the domain in case of mod action, because the mod may be on a different
228 // instance from the post author.
229 let ap_id = if page.is_mod_action(context).await? {
232 page.id(expected_domain)?
234 let ap_id = Some(ap_id.clone().into());
237 .dereference(context, request_counter)
239 let community = page.extract_community(context, request_counter).await?;
240 verify_person_in_community(&page.attributed_to, &community, context, request_counter).await?;
242 let thumbnail_url: Option<Url> = page.image.clone().map(|i| i.url);
243 let (metadata_res, pictrs_thumbnail) = if let Some(url) = &page.url {
244 fetch_site_data(context.client(), &context.settings(), Some(url)).await
246 (None, thumbnail_url)
248 let (embed_title, embed_description, embed_html) = metadata_res
249 .map(|u| (u.title, u.description, u.html))
250 .unwrap_or((None, None, None));
252 let body_slurs_removed = page
255 .map(|s| remove_slurs(&s.content, &context.settings().slur_regex()));
256 let form = PostForm {
257 name: page.name.clone(),
258 url: page.url.clone().map(|u| u.into()),
259 body: body_slurs_removed,
260 creator_id: creator.id,
261 community_id: community.id,
263 locked: page.comments_enabled.map(|e| !e),
264 published: page.published.map(|u| u.naive_local()),
265 updated: page.updated.map(|u| u.naive_local()),
267 nsfw: page.sensitive,
268 stickied: page.stickied,
272 thumbnail_url: pictrs_thumbnail.map(|u| u.into()),
276 let post = blocking(context.pool(), move |conn| Post::upsert(conn, &form)).await??;
284 use crate::objects::{
285 community::ApubCommunity,
286 tests::{file_to_json_object, init_context},
288 use assert_json_diff::assert_json_include;
289 use serial_test::serial;
293 async fn test_parse_lemmy_post() {
294 let context = init_context();
295 let url = Url::parse("https://enterprise.lemmy.ml/post/55143").unwrap();
296 let community_json = file_to_json_object("assets/lemmy-community.json");
297 let community = ApubCommunity::from_apub(&community_json, &context, &url, &mut 0)
300 let person_json = file_to_json_object("assets/lemmy-person.json");
301 let person = ApubPerson::from_apub(&person_json, &context, &url, &mut 0)
304 let json = file_to_json_object("assets/lemmy-post.json");
305 let mut request_counter = 0;
306 let post = ApubPost::from_apub(&json, &context, &url, &mut request_counter)
310 assert_eq!(post.ap_id.clone().into_inner(), url);
311 assert_eq!(post.name, "Post title");
312 assert!(post.body.is_some());
313 assert_eq!(post.body.as_ref().unwrap().len(), 45);
314 assert!(!post.locked);
315 assert!(post.stickied);
316 assert_eq!(request_counter, 0);
318 let to_apub = post.to_apub(&context).await.unwrap();
319 assert_json_include!(actual: json, expected: to_apub);
321 Post::delete(&*context.pool().get().unwrap(), post.id).unwrap();
322 Person::delete(&*context.pool().get().unwrap(), person.id).unwrap();
323 Community::delete(&*context.pool().get().unwrap(), community.id).unwrap();