Split timeline service.

Signed-off-by: Jason Volk <jason@zemos.net>

src/service/rooms/timeline/redact.rs

@@ -0,0 +1,51 @@
+use conduwuit_core::{
+	Result, err, implement,
+	matrix::event::Event,
+	utils::{self},
+};
+use ruma::EventId;
+
+use super::ExtractBody;
+use crate::rooms::short::ShortRoomId;
+
+/// Replace a PDU with the redacted form.
+#[implement(super::Service)]
+#[tracing::instrument(name = "redact", level = "debug", skip(self))]
+pub async fn redact_pdu<Pdu: Event + Send + Sync>(
+	&self,
+	event_id: &EventId,
+	reason: &Pdu,
+	shortroomid: ShortRoomId,
+) -> Result {
+	// TODO: Don't reserialize, keep original json
+	let Ok(pdu_id) = self.get_pdu_id(event_id).await else {
+		// If event does not exist, just noop
+		return Ok(());
+	};
+
+	let mut pdu = self
+		.get_pdu_from_id(&pdu_id)
+		.await
+		.map(Event::into_pdu)
+		.map_err(|e| {
+			err!(Database(error!(?pdu_id, ?event_id, ?e, "PDU ID points to invalid PDU.")))
+		})?;
+
+	if let Ok(content) = pdu.get_content::<ExtractBody>() {
+		if let Some(body) = content.body {
+			self.services
+				.search
+				.deindex_pdu(shortroomid, &pdu_id, &body);
+		}
+	}
+
+	let room_version_id = self.services.state.get_room_version(pdu.room_id()).await?;
+
+	pdu.redact(&room_version_id, reason.to_value())?;
+
+	let obj = utils::to_canonical_object(&pdu).map_err(|e| {
+		err!(Database(error!(?event_id, ?e, "Failed to convert PDU to canonical JSON")))
+	})?;
+
+	self.replace_pdu(&pdu_id, &obj).await
+}