chore: Add logic to dispatch validation based on event type (#493)

* chore: Add logic to dispatch validation based on event type.

* review comments

service/src/event/service.rs

@@ -1,21 +1,22 @@
 use std::collections::HashSet;
 
+use super::{
+    migration::Migrator,
+    order_events::OrderEvents,
+    ordering_task::{DeliverableTask, OrderingTask},
+};
 use async_trait::async_trait;
 use ceramic_core::{EventId, Network};
 use ceramic_event::unvalidated;
+use ceramic_event::unvalidated::Event;
 use ceramic_store::{CeramicOneEvent, EventInsertable, SqlitePool};
 use cid::Cid;
 use futures::stream::BoxStream;
 use ipld_core::ipld::Ipld;
 use recon::ReconItem;
+use tokio::try_join;
 use tracing::{trace, warn};
 
-use super::{
-    migration::Migrator,
-    order_events::OrderEvents,
-    ordering_task::{DeliverableTask, OrderingTask},
-};
-
 use crate::{Error, Result};
 
 /// How many events to select at once to see if they've become deliverable when we have downtime
@@ -129,23 +130,77 @@ impl CeramicEventService {
         )?)
     }
 
-    pub(crate) async fn insert_events(
-        &self,
-        items: &[recon::ReconItem<EventId>],
-        source: DeliverableRequirement,
-    ) -> Result<InsertResult> {
-        let mut to_insert = Vec::new();
-        let mut invalid = Vec::new();
+    async fn validate_signed_events(
+        events: Vec<EventInsertable>,
+    ) -> Result<(Vec<EventInsertable>, Vec<InvalidItem>)> {
+        // TODO: IMPLEMENT THIS
+        Ok((events, Vec::new()))
+    }
+
+    async fn validate_time_events(
+        events: Vec<EventInsertable>,
+    ) -> Result<(Vec<EventInsertable>, Vec<InvalidItem>)> {
+        // TODO: IMPLEMENT THIS
+        Ok((events, Vec::new()))
+    }
+
+    pub(crate) async fn validate_events(
+        items: &[ReconItem<EventId>],
+    ) -> Result<(Vec<EventInsertable>, Vec<InvalidItem>)> {
+        let mut parsed_events = Vec::with_capacity(items.len());
+        let mut invalid_events = Vec::new();
         for event in items {
             match Self::parse_discovered_event(event).await {
-                Ok(insertable) => to_insert.push(insertable),
-                Err(err) => invalid.push(InvalidItem::InvalidFormat {
+                Ok(insertable) => parsed_events.push(insertable),
+                Err(err) => invalid_events.push(InvalidItem::InvalidFormat {
                     key: event.key.clone(),
                     reason: err.to_string(),
                 }),
             }
         }
 
+        // Group events by their type
+        let mut valid_events = Vec::with_capacity(parsed_events.len());
+        let mut signed_events = Vec::with_capacity(parsed_events.len());
+        let mut time_events = Vec::with_capacity(parsed_events.len());
+        for event in parsed_events {
+            match event.event() {
+                Event::Time(_) => {
+                    time_events.push(event);
+                }
+                Event::Signed(_) => {
+                    signed_events.push(event);
+                }
+                Event::Unsigned(_) => {
+                    // Unsigned events need no extra validation.
+                    valid_events.push(event);
+                }
+            }
+        }
+
+        let (
+            (valid_signed_events, invalid_signed_events),
+            (valid_time_events, invalid_time_events),
+        ) = try_join!(
+            Self::validate_signed_events(signed_events),
+            Self::validate_time_events(time_events)
+        )?;
+
+        valid_events.extend(valid_signed_events);
+        valid_events.extend(valid_time_events);
+        invalid_events.extend(invalid_signed_events);
+        invalid_events.extend(invalid_time_events);
+
+        Ok((valid_events, invalid_events))
+    }
+
+    pub(crate) async fn insert_events(
+        &self,
+        items: &[ReconItem<EventId>],
+        source: DeliverableRequirement,
+    ) -> Result<InsertResult> {
+        let (to_insert, mut invalid) = Self::validate_events(items).await?;
+
         let ordered = OrderEvents::try_new(&self.pool, to_insert).await?;
 
         // api writes shouldn't have any missed history so we don't insert those events and