2 activities::{extract_community, verify_person_in_community},
3 context::lemmy_context,
4 fetcher::object_id::ObjectId,
5 objects::{create_tombstone, FromApub, ImageObject, Source, ToApub},
10 kind::{ImageType, PageType},
13 primitives::OneOrMany,
17 use chrono::{DateTime, FixedOffset};
18 use lemmy_api_common::blocking;
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;
44 #[skip_serializing_none]
45 #[derive(Clone, Debug, Deserialize, Serialize)]
46 #[serde(rename_all = "camelCase")]
48 #[serde(rename = "@context")]
49 context: OneOrMany<AnyBase>,
52 pub(crate) attributed_to: ObjectId<Person>,
55 content: Option<String>,
56 media_type: MediaTypeHtml,
57 source: Option<Source>,
59 image: Option<ImageObject>,
60 pub(crate) comments_enabled: Option<bool>,
61 sensitive: Option<bool>,
62 pub(crate) stickied: Option<bool>,
63 published: DateTime<FixedOffset>,
64 updated: Option<DateTime<FixedOffset>>,
70 pub(crate) fn id_unchecked(&self) -> &Url {
73 pub(crate) fn id(&self, expected_domain: &Url) -> Result<&Url, LemmyError> {
74 verify_domains_match(&self.id, expected_domain)?;
78 /// Only mods can change the post's stickied/locked status. So if either of these is changed from
79 /// the current value, it is a mod action and needs to be verified as such.
81 /// Both stickied and locked need to be false on a newly created post (verified in [[CreatePost]].
82 pub(crate) async fn is_mod_action(&self, context: &LemmyContext) -> Result<bool, LemmyError> {
83 let old_post = ObjectId::<Post>::new(self.id.clone())
84 .dereference_local(context)
87 let is_mod_action = if let Ok(old_post) = old_post {
88 self.stickied != Some(old_post.stickied) || self.comments_enabled != Some(!old_post.locked)
95 pub(crate) async fn verify(
97 context: &LemmyContext,
98 request_counter: &mut i32,
99 ) -> Result<(), LemmyError> {
100 let community = extract_community(&self.to, context, request_counter).await?;
102 check_slurs(&self.name, &context.settings().slur_regex())?;
103 verify_domains_match(self.attributed_to.inner(), &self.id.clone())?;
104 verify_person_in_community(
106 &ObjectId::new(community.actor_id()),
115 #[async_trait::async_trait(?Send)]
116 impl ToApub for Post {
117 type ApubType = Page;
119 // Turn a Lemmy post into an ActivityPub page that can be sent out over the network.
120 async fn to_apub(&self, pool: &DbPool) -> Result<Page, LemmyError> {
121 let creator_id = self.creator_id;
122 let creator = blocking(pool, move |conn| Person::read(conn, creator_id)).await??;
123 let community_id = self.community_id;
124 let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
126 let source = self.body.clone().map(|body| Source {
128 media_type: MediaTypeMarkdown::Markdown,
130 let image = self.thumbnail_url.clone().map(|thumb| ImageObject {
131 kind: ImageType::Image,
136 context: lemmy_context(),
137 r#type: PageType::Page,
138 id: self.ap_id.clone().into(),
139 attributed_to: ObjectId::new(creator.actor_id),
140 to: [community.actor_id.into(), public()],
141 name: self.name.clone(),
142 content: self.body.as_ref().map(|b| markdown_to_html(b)),
143 media_type: MediaTypeHtml::Html,
145 url: self.url.clone().map(|u| u.into()),
147 comments_enabled: Some(!self.locked),
148 sensitive: Some(self.nsfw),
149 stickied: Some(self.stickied),
150 published: convert_datetime(self.published),
151 updated: self.updated.map(convert_datetime),
152 unparsed: Default::default(),
157 fn to_tombstone(&self) -> Result<Tombstone, LemmyError> {
160 self.ap_id.to_owned().into(),
167 #[async_trait::async_trait(?Send)]
168 impl FromApub for Post {
169 type ApubType = Page;
173 context: &LemmyContext,
174 expected_domain: &Url,
175 request_counter: &mut i32,
176 ) -> Result<Post, LemmyError> {
177 // We can't verify the domain in case of mod action, because the mod may be on a different
178 // instance from the post author.
179 let ap_id = if page.is_mod_action(context).await? {
182 page.id(expected_domain)?
184 let ap_id = Some(ap_id.clone().into());
187 .dereference(context, request_counter)
189 let community = extract_community(&page.to, context, request_counter).await?;
191 let thumbnail_url: Option<Url> = page.image.clone().map(|i| i.url);
192 let (metadata_res, pictrs_thumbnail) = if let Some(url) = &page.url {
193 fetch_site_data(context.client(), &context.settings(), Some(url)).await
195 (None, thumbnail_url)
197 let (embed_title, embed_description, embed_html) = metadata_res
198 .map(|u| (u.title, u.description, u.html))
199 .unwrap_or((None, None, None));
201 let body_slurs_removed = page
204 .map(|s| remove_slurs(&s.content, &context.settings().slur_regex()));
205 let form = PostForm {
206 name: page.name.clone(),
207 url: page.url.clone().map(|u| u.into()),
208 body: body_slurs_removed,
209 creator_id: creator.id,
210 community_id: community.id,
212 locked: page.comments_enabled.map(|e| !e),
213 published: Some(page.published.naive_local()),
214 updated: page.updated.map(|u| u.naive_local()),
216 nsfw: page.sensitive,
217 stickied: page.stickied,
221 thumbnail_url: pictrs_thumbnail.map(|u| u.into()),
225 Ok(blocking(context.pool(), move |conn| Post::upsert(conn, &form)).await??)