feat: Add Meowlnir invite interception support

Co-authored-by: Jade Ellis <jade@ellis.link>

src/api/client/membership/invite.rs

@@ -1,8 +1,11 @@
 use axum::extract::State;
 use axum_client_ip::InsecureClientIp;
 use conduwuit::{
-	Err, Result, debug_error, err, info,
+	Err, Result,
+	config::Antispam,
+	debug_error, err, info,
 	matrix::{event::gen_event_id_canonical_json, pdu::PduBuilder},
+	trace,
 };
 use futures::FutureExt;
 use ruma::{
@@ -12,6 +15,7 @@ use ruma::{
 		invite_permission_config::FilterLevel,
 		room::member::{MembershipState, RoomMemberEventContent},
 	},
+	meowlnir_antispam::user_may_invite,
 };
 use service::Services;
 
@@ -124,6 +128,26 @@ pub(crate) async fn invite_helper(
 		return Err!(Request(Forbidden("Invites are not allowed on this server.")));
 	}
 
+	trace!("maybe ask meowlnir");
+	if let Some(Antispam { meowlnir: Some(cfg) }) = &services.config.antispam {
+		trace!("asking meowlnir");
+		services
+			.sending
+			.send_meowlnir_antispam_request(
+				cfg,
+				user_may_invite::v1::Request::new(
+					cfg.management_room.clone(),
+					sender_user.to_owned(),
+					recipient_user.to_owned(),
+				),
+			)
+			.await
+			.inspect(|_| trace!("meowlnir :D"))
+			.inspect_err(|e| debug_error!("meowlnir sad: {e}"))?;
+	} else {
+		trace!("no meowlnir configured");
+	}
+
 	if !services.globals.user_is_local(recipient_user) {
 		let (pdu, pdu_json, invite_room_state) = {
 			let state_lock = services.rooms.state.mutex.lock(room_id).await;

src/api/server/invite.rs

@@ -2,7 +2,9 @@ use axum::extract::State;
 use axum_client_ip::InsecureClientIp;
 use base64::{Engine as _, engine::general_purpose};
 use conduwuit::{
-	Err, Error, PduEvent, Result, err,
+	Err, Error, PduEvent, Result,
+	config::Antispam,
+	err,
 	matrix::{Event, event::gen_event_id},
 	utils::{self, hash::sha256},
 	warn,
@@ -11,6 +13,7 @@ use ruma::{
 	CanonicalJsonValue, OwnedUserId, UserId,
 	api::{client::error::ErrorKind, federation::membership::create_invite},
 	events::room::member::{MembershipState, RoomMemberEventContent},
+	meowlnir_antispam::user_may_invite,
 	serde::JsonObject,
 };
 
@@ -148,6 +151,20 @@ pub(crate) async fn create_invite_route(
 		return Err!(Request(Forbidden("This server does not allow room invites.")));
 	}
 
+	if let Some(Antispam { meowlnir: Some(cfg) }) = &services.config.antispam {
+		services
+			.sending
+			.send_meowlnir_antispam_request(
+				cfg,
+				user_may_invite::v1::Request::new(
+					cfg.management_room.clone(),
+					sender_user.to_owned(),
+					recipient_user.clone(),
+				),
+			)
+			.await?;
+	}
+
 	let mut invite_state = body.invite_room_state.clone();
 
 	let mut event: JsonObject = serde_json::from_str(body.event.get())