2 check_community_or_site_ban,
3 check_is_apub_id_valid,
4 fetcher::{community::get_or_fetch_and_upsert_community, person::get_or_fetch_and_upsert_person},
5 generate_moderators_url,
8 use lemmy_api_common::blocking;
9 use lemmy_apub_lib::{verify_domains_match, ActivityFields};
10 use lemmy_db_queries::ApubObject;
11 use lemmy_db_schema::{
12 source::{community::Community, person::Person},
15 use lemmy_db_views_actor::community_view::CommunityView;
16 use lemmy_utils::{settings::structs::Settings, LemmyError};
17 use lemmy_websocket::LemmyContext;
18 use serde::{Deserialize, Serialize};
19 use strum_macros::ToString;
20 use url::{ParseError, Url};
28 pub mod private_message;
33 #[derive(Clone, Debug, ToString, Deserialize, Serialize)]
34 pub enum CreateOrUpdateType {
39 /// Checks that the specified Url actually identifies a Person (by fetching it), and that the person
40 /// doesn't have a site ban.
41 async fn verify_person(
43 context: &LemmyContext,
44 request_counter: &mut i32,
45 ) -> Result<(), LemmyError> {
46 let person = get_or_fetch_and_upsert_person(person_id, context, request_counter).await?;
48 return Err(anyhow!("Person {} is banned", person_id).into());
53 pub(crate) async fn extract_community(
55 context: &LemmyContext,
56 request_counter: &mut i32,
57 ) -> Result<Community, LemmyError> {
58 let mut cc_iter = cc.iter();
60 if let Some(cid) = cc_iter.next() {
61 if let Ok(c) = get_or_fetch_and_upsert_community(cid, context, request_counter).await {
65 return Err(anyhow!("No community found in cc").into());
70 /// Fetches the person and community to verify their type, then checks if person is banned from site
72 pub(crate) async fn verify_person_in_community(
75 context: &LemmyContext,
76 request_counter: &mut i32,
77 ) -> Result<(), LemmyError> {
78 let community = get_or_fetch_and_upsert_community(community_id, context, request_counter).await?;
79 let person = get_or_fetch_and_upsert_person(person_id, context, request_counter).await?;
80 check_community_or_site_ban(&person, community.id, context.pool()).await
83 /// Simply check that the url actually refers to a valid group.
84 async fn verify_community(
86 context: &LemmyContext,
87 request_counter: &mut i32,
88 ) -> Result<(), LemmyError> {
89 get_or_fetch_and_upsert_community(community_id, context, request_counter).await?;
93 fn verify_activity(activity: &dyn ActivityFields) -> Result<(), LemmyError> {
94 check_is_apub_id_valid(activity.actor(), false)?;
95 verify_domains_match(activity.id_unchecked(), activity.actor())?;
99 /// Verify that the actor is a community mod. This check is only run if the community is local,
100 /// because in case of remote communities, admins can also perform mod actions. As admin status
101 /// is not federated, we cant verify their actions remotely.
102 pub(crate) async fn verify_mod_action(
105 context: &LemmyContext,
106 ) -> Result<(), LemmyError> {
107 let community = blocking(context.pool(), move |conn| {
108 Community::read_from_apub_id(conn, &community.into())
113 let actor_id: DbUrl = actor_id.clone().into();
114 let actor = blocking(context.pool(), move |conn| {
115 Person::read_from_apub_id(conn, &actor_id)
119 // Note: this will also return true for admins in addition to mods, but as we dont know about
120 // remote admins, it doesnt make any difference.
121 let community_id = community.id;
122 let actor_id = actor.id;
123 let is_mod_or_admin = blocking(context.pool(), move |conn| {
124 CommunityView::is_mod_or_admin(conn, actor_id, community_id)
127 if !is_mod_or_admin {
128 return Err(anyhow!("Not a mod").into());
134 /// For Add/Remove community moderator activities, check that the target field actually contains
135 /// /c/community/moderators. Any different values are unsupported.
136 fn verify_add_remove_moderator_target(target: &Url, community: Url) -> Result<(), LemmyError> {
137 if target != &generate_moderators_url(&community.into())?.into_inner() {
138 return Err(anyhow!("Unkown target url").into());
143 /// Generate a unique ID for an activity, in the format:
144 /// `http(s)://example.com/receive/create/202daf0a-1489-45df-8d2e-c8a3173fed36`
145 fn generate_activity_id<T>(kind: T) -> Result<Url, ParseError>
150 "{}/activities/{}/{}",
151 Settings::get().get_protocol_and_hostname(),
152 kind.to_string().to_lowercase(),