2 activities::{extract_community, verify_person_in_community},
3 context::lemmy_context,
4 fetcher::object_id::ObjectId,
5 objects::{create_tombstone, person::ApubPerson, ImageObject, Source},
10 kind::{ImageType, PageType},
13 primitives::OneOrMany,
17 use chrono::{DateTime, FixedOffset, NaiveDateTime};
18 use lemmy_api_common::blocking;
20 traits::{ActorType, ApubObject, FromApub, ToApub},
21 values::{MediaTypeHtml, MediaTypeMarkdown},
22 verify::verify_domains_match,
24 use lemmy_db_schema::{
29 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")]
49 #[serde(rename = "@context")]
50 context: OneOrMany<AnyBase>,
53 pub(crate) attributed_to: ObjectId<ApubPerson>,
56 content: Option<String>,
57 media_type: MediaTypeHtml,
58 source: Option<Source>,
60 image: Option<ImageObject>,
61 pub(crate) comments_enabled: Option<bool>,
62 sensitive: Option<bool>,
63 pub(crate) stickied: Option<bool>,
64 published: DateTime<FixedOffset>,
65 updated: Option<DateTime<FixedOffset>>,
71 pub(crate) fn id_unchecked(&self) -> &Url {
74 pub(crate) fn id(&self, expected_domain: &Url) -> Result<&Url, LemmyError> {
75 verify_domains_match(&self.id, expected_domain)?;
79 /// Only mods can change the post's stickied/locked status. So if either of these is changed from
80 /// the current value, it is a mod action and needs to be verified as such.
82 /// Both stickied and locked need to be false on a newly created post (verified in [[CreatePost]].
83 pub(crate) async fn is_mod_action(&self, context: &LemmyContext) -> Result<bool, LemmyError> {
84 let old_post = ObjectId::<ApubPost>::new(self.id.clone())
85 .dereference_local(context)
88 let is_mod_action = if let Ok(old_post) = old_post {
89 self.stickied != Some(old_post.stickied) || self.comments_enabled != Some(!old_post.locked)
96 pub(crate) async fn verify(
98 context: &LemmyContext,
99 request_counter: &mut i32,
100 ) -> Result<(), LemmyError> {
101 let community = extract_community(&self.to, context, request_counter).await?;
103 check_slurs(&self.name, &context.settings().slur_regex())?;
104 verify_domains_match(self.attributed_to.inner(), &self.id.clone())?;
105 verify_person_in_community(
107 &ObjectId::new(community.actor_id()),
116 #[derive(Clone, Debug)]
117 pub struct ApubPost(Post);
119 impl Deref for ApubPost {
121 fn deref(&self) -> &Self::Target {
126 impl From<Post> for ApubPost {
127 fn from(p: Post) -> Self {
132 #[async_trait::async_trait(?Send)]
133 impl ApubObject for ApubPost {
134 type DataType = LemmyContext;
136 fn last_refreshed_at(&self) -> Option<NaiveDateTime> {
140 async fn read_from_apub_id(
142 context: &LemmyContext,
143 ) -> Result<Option<Self>, LemmyError> {
145 blocking(context.pool(), move |conn| {
146 Post::read_from_apub_id(conn, object_id)
153 async fn delete(self, context: &LemmyContext) -> Result<(), LemmyError> {
154 blocking(context.pool(), move |conn| {
155 Post::update_deleted(conn, self.id, true)
162 #[async_trait::async_trait(?Send)]
163 impl ToApub for ApubPost {
164 type ApubType = Page;
165 type TombstoneType = Tombstone;
166 type DataType = DbPool;
168 // Turn a Lemmy post into an ActivityPub page that can be sent out over the network.
169 async fn to_apub(&self, pool: &DbPool) -> Result<Page, LemmyError> {
170 let creator_id = self.creator_id;
171 let creator = blocking(pool, move |conn| Person::read(conn, creator_id)).await??;
172 let community_id = self.community_id;
173 let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
175 let source = self.body.clone().map(|body| Source {
177 media_type: MediaTypeMarkdown::Markdown,
179 let image = self.thumbnail_url.clone().map(|thumb| ImageObject {
180 kind: ImageType::Image,
185 context: lemmy_context(),
186 r#type: PageType::Page,
187 id: self.ap_id.clone().into(),
188 attributed_to: ObjectId::new(creator.actor_id),
189 to: [community.actor_id.into(), public()],
190 name: self.name.clone(),
191 content: self.body.as_ref().map(|b| markdown_to_html(b)),
192 media_type: MediaTypeHtml::Html,
194 url: self.url.clone().map(|u| u.into()),
196 comments_enabled: Some(!self.locked),
197 sensitive: Some(self.nsfw),
198 stickied: Some(self.stickied),
199 published: convert_datetime(self.published),
200 updated: self.updated.map(convert_datetime),
201 unparsed: Default::default(),
206 fn to_tombstone(&self) -> Result<Tombstone, LemmyError> {
209 self.ap_id.to_owned().into(),
216 #[async_trait::async_trait(?Send)]
217 impl FromApub for ApubPost {
218 type ApubType = Page;
219 type DataType = LemmyContext;
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 = extract_community(&page.to, context, request_counter).await?;
241 let thumbnail_url: Option<Url> = page.image.clone().map(|i| i.url);
242 let (metadata_res, pictrs_thumbnail) = if let Some(url) = &page.url {
243 fetch_site_data(context.client(), &context.settings(), Some(url)).await
245 (None, thumbnail_url)
247 let (embed_title, embed_description, embed_html) = metadata_res
248 .map(|u| (u.title, u.description, u.html))
249 .unwrap_or((None, None, None));
251 let body_slurs_removed = page
254 .map(|s| remove_slurs(&s.content, &context.settings().slur_regex()));
255 let form = PostForm {
256 name: page.name.clone(),
257 url: page.url.clone().map(|u| u.into()),
258 body: body_slurs_removed,
259 creator_id: creator.id,
260 community_id: community.id,
262 locked: page.comments_enabled.map(|e| !e),
263 published: Some(page.published.naive_local()),
264 updated: page.updated.map(|u| u.naive_local()),
266 nsfw: page.sensitive,
267 stickied: page.stickied,
271 thumbnail_url: pictrs_thumbnail.map(|u| u.into()),
275 let post = blocking(context.pool(), move |conn| Post::upsert(conn, &form)).await??;