refactor(activities): split into per-activity files with check_guards DRY helper

src/activities/block.rs

@@ -0,0 +1,54 @@
+use activitypub_federation::{
+    config::Data,
+    fetch::object_id::ObjectId,
+    protocol::verification::verify_domains_match,
+    traits::Activity,
+};
+use serde::{Deserialize, Serialize};
+use url::Url;
+
+use crate::actors::DbActor;
+use crate::data::FederationData;
+use crate::error::Error;
+
+use super::helpers::check_guards;
+
+#[derive(Clone, Default, Debug, Serialize, Deserialize)]
+#[serde(rename = "Block")]
+pub struct BlockType;
+
+#[derive(Debug, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct BlockActivity {
+    pub(crate) id: Url,
+    #[serde(rename = "type", default)]
+    pub(crate) kind: BlockType,
+    pub(crate) actor: ObjectId<DbActor>,
+    pub(crate) object: Url,
+}
+
+#[async_trait::async_trait]
+impl Activity for BlockActivity {
+    type DataType = FederationData;
+    type Error = Error;
+
+    fn id(&self) -> &Url { &self.id }
+    fn actor(&self) -> &Url { self.actor.inner() }
+
+    async fn verify(&self, _data: &Data<Self::DataType>) -> Result<(), Self::Error> {
+        verify_domains_match(&self.id, self.actor.inner())?;
+        Ok(())
+    }
+
+    async fn receive(self, data: &Data<Self::DataType>) -> Result<(), Self::Error> {
+        if check_guards(&self.id, self.actor.inner(), data).await? {
+            return Ok(());
+        }
+        if let Some(local_user_id) = crate::urls::extract_user_id_from_url(&self.object) {
+            let _ = data.federation_repo.remove_following(local_user_id, self.actor.inner().as_str()).await;
+            let _ = data.federation_repo.remove_follower(local_user_id, self.actor.inner().as_str()).await;
+        }
+        tracing::info!(actor = %self.actor.inner(), "received block — removed following and follower");
+        Ok(())
+    }
+}