2 activities::{verify_is_public, verify_person_in_community},
3 check_is_apub_id_valid,
4 objects::{read_from_string_or_source_opt, verify_is_remote_object},
7 page::{Attachment, AttributedTo, Page, PageType},
14 use activitystreams_kinds::public;
15 use chrono::NaiveDateTime;
16 use lemmy_api_common::{request::fetch_site_data, utils::blocking};
20 values::MediaTypeMarkdownOrHtml,
21 verify::verify_domains_match,
23 use lemmy_db_schema::{
27 moderator::{ModLockPost, ModLockPostForm, ModStickyPost, ModStickyPostForm},
29 post::{Post, PostForm},
34 utils::{check_slurs, convert_datetime, markdown_to_html, remove_slurs},
37 use lemmy_websocket::LemmyContext;
41 #[derive(Clone, Debug)]
42 pub struct ApubPost(Post);
44 impl Deref for ApubPost {
46 fn deref(&self) -> &Self::Target {
51 impl From<Post> for ApubPost {
52 fn from(p: Post) -> Self {
57 #[async_trait::async_trait(?Send)]
58 impl ApubObject for ApubPost {
59 type DataType = LemmyContext;
62 type TombstoneType = Tombstone;
64 fn last_refreshed_at(&self) -> Option<NaiveDateTime> {
68 #[tracing::instrument(skip_all)]
69 async fn read_from_apub_id(
71 context: &LemmyContext,
72 ) -> Result<Option<Self>, LemmyError> {
74 blocking(context.pool(), move |conn| {
75 Post::read_from_apub_id(conn, object_id)
82 #[tracing::instrument(skip_all)]
83 async fn delete(self, context: &LemmyContext) -> Result<(), LemmyError> {
85 blocking(context.pool(), move |conn| {
86 Post::update_deleted(conn, self.id, true)
93 // Turn a Lemmy post into an ActivityPub page that can be sent out over the network.
94 #[tracing::instrument(skip_all)]
95 async fn into_apub(self, context: &LemmyContext) -> Result<Page, LemmyError> {
96 let creator_id = self.creator_id;
97 let creator = blocking(context.pool(), move |conn| Person::read(conn, creator_id)).await??;
98 let community_id = self.community_id;
99 let community = blocking(context.pool(), move |conn| {
100 Community::read(conn, community_id)
105 kind: PageType::Page,
106 id: ObjectId::new(self.ap_id.clone()),
107 attributed_to: AttributedTo::Lemmy(ObjectId::new(creator.actor_id)),
108 to: vec![community.actor_id.into(), public()],
110 name: self.name.clone(),
111 content: self.body.as_ref().map(|b| markdown_to_html(b)),
112 media_type: Some(MediaTypeMarkdownOrHtml::Html),
113 source: self.body.clone().map(Source::new),
114 url: self.url.clone().map(|u| u.into()),
115 attachment: self.url.clone().map(Attachment::new).into_iter().collect(),
116 image: self.thumbnail_url.clone().map(ImageObject::new),
117 comments_enabled: Some(!self.locked),
118 sensitive: Some(self.nsfw),
119 stickied: Some(self.stickied),
120 published: Some(convert_datetime(self.published)),
121 updated: self.updated.map(convert_datetime),
126 fn to_tombstone(&self) -> Result<Tombstone, LemmyError> {
127 Ok(Tombstone::new(self.ap_id.clone().into()))
130 #[tracing::instrument(skip_all)]
133 expected_domain: &Url,
134 context: &LemmyContext,
135 request_counter: &mut i32,
136 ) -> Result<(), LemmyError> {
137 // We can't verify the domain in case of mod action, because the mod may be on a different
138 // instance from the post author.
139 if !page.is_mod_action(context).await? {
140 verify_domains_match(page.id.inner(), expected_domain)?;
141 verify_is_remote_object(page.id.inner())?;
144 let community = page.extract_community(context, request_counter).await?;
145 check_is_apub_id_valid(page.id.inner(), community.local, &context.settings())?;
146 verify_person_in_community(&page.creator()?, &community, context, request_counter).await?;
147 check_slurs(&page.name, &context.settings().slur_regex())?;
148 verify_domains_match(page.creator()?.inner(), page.id.inner())?;
149 verify_is_public(&page.to, &page.cc)?;
153 #[tracing::instrument(skip_all)]
156 context: &LemmyContext,
157 request_counter: &mut i32,
158 ) -> Result<ApubPost, LemmyError> {
161 .dereference(context, context.client(), request_counter)
163 let community = page.extract_community(context, request_counter).await?;
165 let form = if !page.is_mod_action(context).await? {
166 let url = if let Some(attachment) = page.attachment.first() {
167 // url as sent by Lemmy (new)
168 Some(attachment.href.clone())
169 } else if page.kind == PageType::Video {
170 // we cant display videos directly, so insert a link to external video page
171 Some(page.id.inner().clone())
173 // url sent by lemmy (old)
176 let thumbnail_url: Option<Url> = page.image.map(|i| i.url);
177 let (metadata_res, pictrs_thumbnail) = if let Some(url) = &url {
178 fetch_site_data(context.client(), &context.settings(), Some(url)).await
180 (None, thumbnail_url)
182 let (embed_title, embed_description, embed_html) = metadata_res
183 .map(|u| (u.title, u.description, u.html))
184 .unwrap_or((None, None, None));
185 let body_slurs_removed =
186 read_from_string_or_source_opt(&page.content, &page.media_type, &page.source)
187 .map(|s| remove_slurs(&s, &context.settings().slur_regex()));
190 name: page.name.clone(),
191 url: url.map(Into::into),
192 body: body_slurs_removed,
193 creator_id: creator.id,
194 community_id: community.id,
196 locked: page.comments_enabled.map(|e| !e),
197 published: page.published.map(|u| u.naive_local()),
198 updated: page.updated.map(|u| u.naive_local()),
200 nsfw: page.sensitive,
201 stickied: page.stickied,
205 thumbnail_url: pictrs_thumbnail.map(|u| u.into()),
206 ap_id: Some(page.id.clone().into()),
210 // if is mod action, only update locked/stickied fields, nothing else
212 name: page.name.clone(),
213 creator_id: creator.id,
214 community_id: community.id,
215 locked: page.comments_enabled.map(|e| !e),
216 stickied: page.stickied,
217 updated: page.updated.map(|u| u.naive_local()),
218 ap_id: Some(page.id.clone().into()),
223 // read existing, local post if any (for generating mod log)
224 let old_post = ObjectId::<ApubPost>::new(page.id.clone())
225 .dereference_local(context)
228 let post = blocking(context.pool(), move |conn| Post::upsert(conn, &form)).await??;
230 // write mod log entries for sticky/lock
231 if Page::is_stickied_changed(&old_post, &page.stickied) {
232 let form = ModStickyPostForm {
233 mod_person_id: creator.id,
235 stickied: Some(post.stickied),
237 blocking(context.pool(), move |conn| {
238 ModStickyPost::create(conn, &form)
242 if Page::is_locked_changed(&old_post, &page.comments_enabled) {
243 let form = ModLockPostForm {
244 mod_person_id: creator.id,
246 locked: Some(post.locked),
248 blocking(context.pool(), move |conn| ModLockPost::create(conn, &form)).await??;
260 community::tests::parse_lemmy_community,
261 person::tests::parse_lemmy_person,
265 protocol::tests::file_to_json_object,
267 use lemmy_db_schema::source::site::Site;
268 use serial_test::serial;
272 async fn test_parse_lemmy_post() {
273 let context = init_context();
274 let (person, site) = parse_lemmy_person(&context).await;
275 let community = parse_lemmy_community(&context).await;
277 let json = file_to_json_object("assets/lemmy/objects/page.json").unwrap();
278 let url = Url::parse("https://enterprise.lemmy.ml/post/55143").unwrap();
279 let mut request_counter = 0;
280 ApubPost::verify(&json, &url, &context, &mut request_counter)
283 let post = ApubPost::from_apub(json, &context, &mut request_counter)
287 assert_eq!(post.ap_id, url.into());
288 assert_eq!(post.name, "Post title");
289 assert!(post.body.is_some());
290 assert_eq!(post.body.as_ref().unwrap().len(), 45);
291 assert!(!post.locked);
292 assert!(post.stickied);
293 assert_eq!(request_counter, 0);
295 Post::delete(&*context.pool().get().unwrap(), post.id).unwrap();
296 Person::delete(&*context.pool().get().unwrap(), person.id).unwrap();
297 Community::delete(&*context.pool().get().unwrap(), community.id).unwrap();
298 Site::delete(&*context.pool().get().unwrap(), site.id).unwrap();