2 check_community_or_site_ban,
3 check_is_apub_id_valid,
4 fetcher::person::get_or_fetch_and_upsert_person,
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_api_common::blocking;
15 use lemmy_db_queries::{ApubObject, Crud, DbPool};
16 use lemmy_db_schema::{CommunityId, DbUrl};
19 settings::structs::Settings,
20 utils::{convert_datetime, markdown_to_html},
23 use lemmy_websocket::LemmyContext;
26 pub(crate) mod comment;
27 pub(crate) mod community;
28 pub(crate) mod person;
30 pub(crate) mod private_message;
32 /// Trait for converting an object or actor into the respective ActivityPub type.
33 #[async_trait::async_trait(?Send)]
36 async fn to_apub(&self, pool: &DbPool) -> Result<Self::ApubType, LemmyError>;
37 fn to_tombstone(&self) -> Result<Tombstone, LemmyError>;
40 #[async_trait::async_trait(?Send)]
43 /// Converts an object from ActivityPub type to Lemmy internal type.
45 /// * `apub` The object to read from
46 /// * `context` LemmyContext which holds DB pool, HTTP client etc
47 /// * `expected_domain` Domain where the object was received from. None in case of mod action.
48 /// * `mod_action_allowed` True if the object can be a mod activity, ignore `expected_domain` in this case
50 apub: &Self::ApubType,
51 context: &LemmyContext,
53 request_counter: &mut i32,
54 mod_action_allowed: bool,
55 ) -> Result<Self, LemmyError>
60 #[async_trait::async_trait(?Send)]
61 pub trait FromApubToForm<ApubType> {
64 context: &LemmyContext,
66 request_counter: &mut i32,
67 mod_action_allowed: bool,
68 ) -> Result<Self, LemmyError>
73 /// Updated is actually the deletion time
74 fn create_tombstone<T>(
77 updated: Option<NaiveDateTime>,
79 ) -> Result<Tombstone, LemmyError>
84 if let Some(updated) = updated {
85 let mut tombstone = Tombstone::new();
86 tombstone.set_id(object_id);
87 tombstone.set_former_type(former_type.to_string());
88 tombstone.set_deleted(convert_datetime(updated));
91 Err(anyhow!("Cant convert to tombstone because updated time was None.").into())
94 Err(anyhow!("Cant convert object to tombstone if it wasnt deleted").into())
98 pub(in crate::objects) fn check_object_domain<T, Kind>(
100 expected_domain: Url,
101 ) -> Result<DbUrl, LemmyError>
103 T: Base + AsBase<Kind>,
105 let domain = expected_domain.domain().context(location_info!())?;
106 let object_id = apub.id(domain)?.context(location_info!())?;
107 check_is_apub_id_valid(object_id)?;
108 Ok(object_id.to_owned().into())
111 pub(in crate::objects) fn set_content_and_source<T, Kind1, Kind2>(
114 ) -> Result<(), LemmyError>
116 T: ApObjectExt<Kind1> + ObjectExt<Kind2> + AsBase<Kind2>,
118 let mut source = Object::<()>::new_none_type();
120 .set_content(markdown_text)
121 .set_media_type(mime_markdown()?);
122 object.set_source(source.into_any_base()?);
124 object.set_content(markdown_to_html(markdown_text));
125 object.set_media_type(mime_html()?);
129 pub(in crate::objects) fn get_source_markdown_value<T, Kind1, Kind2>(
131 ) -> Result<Option<String>, LemmyError>
133 T: ApObjectExt<Kind1> + ObjectExt<Kind2> + AsBase<Kind2>,
137 .map(|s| s.as_single_xsd_string().map(|s2| s2.to_string()))
139 if content.is_some() {
140 let source = object.source().context(location_info!())?;
141 let source = Object::<()>::from_any_base(source.to_owned())?.context(location_info!())?;
142 check_is_markdown(source.media_type())?;
143 let source_content = source
145 .map(|s| s.as_single_xsd_string().map(|s2| s2.to_string()))
147 .context(location_info!())?;
148 return Ok(Some(source_content));
153 fn mime_markdown() -> Result<Mime, FromStrError> {
154 "text/markdown".parse()
157 fn mime_html() -> Result<Mime, FromStrError> {
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 async fn get_object_from_apub<From, Kind, To, ToForm, IdType>(
177 context: &LemmyContext,
178 expected_domain: Url,
179 request_counter: &mut i32,
181 ) -> Result<To, LemmyError>
184 To: ApubObject<ToForm> + Crud<ToForm, IdType> + Send + 'static,
185 ToForm: FromApubToForm<From> + Send + 'static,
187 let object_id = from.id_unchecked().context(location_info!())?.to_owned();
188 let domain = object_id.domain().context(location_info!())?;
190 // if its a local object, return it directly from the database
191 if Settings::get().hostname() == domain {
192 let object = blocking(context.pool(), move |conn| {
193 To::read_from_apub_id(conn, &object_id.into())
198 // otherwise parse and insert, assuring that it comes from the right domain
200 let to_form = ToForm::from_apub(
209 let to = blocking(context.pool(), move |conn| To::upsert(conn, &to_form)).await??;
214 pub(in crate::objects) async fn check_object_for_community_or_site_ban<T, Kind>(
216 community_id: CommunityId,
217 context: &LemmyContext,
218 request_counter: &mut i32,
219 ) -> Result<(), LemmyError>
223 let person_id = object
225 .context(location_info!())?
226 .as_single_xsd_any_uri()
227 .context(location_info!())?;
228 let person = get_or_fetch_and_upsert_person(person_id, context, request_counter).await?;
229 check_community_or_site_ban(&person, community_id, context.pool()).await