2 check_is_apub_id_valid,
3 fetcher::{community::get_or_fetch_and_upsert_community, user::get_or_fetch_and_upsert_user},
4 inbox::community_inbox::check_community_or_site_ban,
7 base::{AsBase, BaseExt, ExtendsExt},
9 mime::{FromStrError, Mime},
10 object::{ApObjectExt, Object, ObjectExt, Tombstone, TombstoneExt},
12 use anyhow::{anyhow, Context};
13 use chrono::NaiveDateTime;
14 use lemmy_db_queries::{ApubObject, Crud, DbPool};
15 use lemmy_structs::blocking;
16 use lemmy_utils::{location_info, settings::Settings, utils::convert_datetime, LemmyError};
17 use lemmy_websocket::LemmyContext;
20 pub(crate) mod comment;
21 pub(crate) mod community;
23 pub(crate) mod private_message;
26 /// Trait for converting an object or actor into the respective ActivityPub type.
27 #[async_trait::async_trait(?Send)]
28 pub(crate) trait ToApub {
30 async fn to_apub(&self, pool: &DbPool) -> Result<Self::ApubType, LemmyError>;
31 fn to_tombstone(&self) -> Result<Tombstone, LemmyError>;
34 #[async_trait::async_trait(?Send)]
35 pub(crate) trait FromApub {
37 /// Converts an object from ActivityPub type to Lemmy internal type.
39 /// * `apub` The object to read from
40 /// * `context` LemmyContext which holds DB pool, HTTP client etc
41 /// * `expected_domain` Domain where the object was received from
43 apub: &Self::ApubType,
44 context: &LemmyContext,
46 request_counter: &mut i32,
47 ) -> Result<Self, LemmyError>
52 #[async_trait::async_trait(?Send)]
53 pub(in crate::objects) trait FromApubToForm<ApubType> {
56 context: &LemmyContext,
58 request_counter: &mut i32,
59 ) -> Result<Self, LemmyError>
64 /// Updated is actually the deletion time
65 fn create_tombstone<T>(
68 updated: Option<NaiveDateTime>,
70 ) -> Result<Tombstone, LemmyError>
75 if let Some(updated) = updated {
76 let mut tombstone = Tombstone::new();
77 tombstone.set_id(object_id);
78 tombstone.set_former_type(former_type.to_string());
79 tombstone.set_deleted(convert_datetime(updated));
82 Err(anyhow!("Cant convert to tombstone because updated time was None.").into())
85 Err(anyhow!("Cant convert object to tombstone if it wasnt deleted").into())
89 pub(in crate::objects) fn check_object_domain<T, Kind>(
92 ) -> Result<lemmy_db_schema::Url, LemmyError>
94 T: Base + AsBase<Kind>,
96 let domain = expected_domain.domain().context(location_info!())?;
97 let object_id = apub.id(domain)?.context(location_info!())?;
98 check_is_apub_id_valid(object_id)?;
99 Ok(object_id.to_owned().into())
102 pub(in crate::objects) fn set_content_and_source<T, Kind1, Kind2>(
105 ) -> Result<(), LemmyError>
107 T: ApObjectExt<Kind1> + ObjectExt<Kind2> + AsBase<Kind2>,
109 let mut source = Object::<()>::new_none_type();
111 .set_content(markdown_text)
112 .set_media_type(mime_markdown()?);
113 object.set_source(source.into_any_base()?);
115 // set `content` to markdown for compatibility with older Lemmy versions
116 // TODO: change this to HTML in a while
117 object.set_content(markdown_text);
118 object.set_media_type(mime_markdown()?);
119 //object.set_content(markdown_to_html(markdown_text));
123 pub(in crate::objects) fn get_source_markdown_value<T, Kind1, Kind2>(
125 ) -> Result<Option<String>, LemmyError>
127 T: ApObjectExt<Kind1> + ObjectExt<Kind2> + AsBase<Kind2>,
131 .map(|s| s.as_single_xsd_string())
133 .map(|s| s.to_string());
134 if content.is_some() {
135 let source = object.source();
136 // updated lemmy version, read markdown from `source.content`
137 if let Some(source) = source {
138 let source = Object::<()>::from_any_base(source.to_owned())?.context(location_info!())?;
139 check_is_markdown(source.media_type())?;
140 let source_content = source
142 .map(|s| s.as_single_xsd_string())
144 .context(location_info!())?
146 return Ok(Some(source_content));
148 // older lemmy version, read markdown from `content`
149 // TODO: remove this after a while
157 pub(in crate::objects) fn mime_markdown() -> Result<Mime, FromStrError> {
158 "text/markdown".parse()
161 pub(in crate::objects) fn check_is_markdown(mime: Option<&Mime>) -> Result<(), LemmyError> {
162 let mime = mime.context(location_info!())?;
163 if !mime.eq(&mime_markdown()?) {
164 Err(LemmyError::from(anyhow!(
165 "Lemmy only supports markdown content"
172 /// Converts an ActivityPub object (eg `Note`) to a database object (eg `Comment`). If an object
173 /// with the same ActivityPub ID already exists in the database, it is returned directly. Otherwise
174 /// the apub object is parsed, inserted and returned.
175 pub(in crate::objects) async fn get_object_from_apub<From, Kind, To, ToForm>(
177 context: &LemmyContext,
178 expected_domain: Url,
179 request_counter: &mut i32,
180 ) -> Result<To, LemmyError>
183 To: ApubObject<ToForm> + Crud<ToForm> + Send + 'static,
184 ToForm: FromApubToForm<From> + Send + 'static,
186 let object_id = from.id_unchecked().context(location_info!())?.to_owned();
187 let domain = object_id.domain().context(location_info!())?;
189 // if its a local object, return it directly from the database
190 if Settings::get().hostname == domain {
191 let object = blocking(context.pool(), move |conn| {
192 To::read_from_apub_id(conn, &object_id.into())
197 // otherwise parse and insert, assuring that it comes from the right domain
199 let to_form = ToForm::from_apub(&from, context, expected_domain, request_counter).await?;
201 let to = blocking(context.pool(), move |conn| To::upsert(conn, &to_form)).await??;
206 pub(in crate::objects) async fn check_object_for_community_or_site_ban<T, Kind>(
208 context: &LemmyContext,
209 request_counter: &mut i32,
210 ) -> Result<(), LemmyError>
216 .context(location_info!())?
217 .as_single_xsd_any_uri()
218 .context(location_info!())?;
219 let user = get_or_fetch_and_upsert_user(user_id, context, request_counter).await?;
220 let community_id = object
222 .context(location_info!())?
223 .as_single_xsd_any_uri()
224 .context(location_info!())?;
225 let community = get_or_fetch_and_upsert_community(community_id, context, request_counter).await?;
226 check_community_or_site_ban(&user, &community, context.pool()).await