Split router out into its own library

packages/app/src/index.ts

@@ -12,7 +12,6 @@ export * from "./profiles.js"
 export * from "./pins.js"
 export * from "./relays.js"
 export * from "./relaySelections.js"
-export * from "./router.js"
 export * from "./search.js"
 export * from "./session.js"
 export * from "./storage.js"
@@ -25,3 +24,54 @@ export * from "./user.js"
 export * from "./util.js"
 export * from "./wot.js"
 export * from "./zappers.js"
+
+import {sortBy, throttleWithValue, tryCatch} from "@welshman/lib"
+import {verifyEvent, isEphemeralKind, isDVMKind} from "@welshman/util"
+import {routerContext} from "@welshman/router"
+import {Pool, SocketEvent, isRelayEvent} from "@welshman/net"
+import {pubkey} from "./session.js"
+import {repository, tracker} from "./core.js"
+import {getPubkeyRelays} from "./relaySelections.js"
+import {Relay, relays, loadRelay, trackRelayStats, getRelayQuality} from "./relays.js"
+
+// Sync relays with our database
+
+Pool.get().subscribe(socket => {
+  loadRelay(socket.url)
+  trackRelayStats(socket)
+
+  socket.on(SocketEvent.Receive, message => {
+    if (isRelayEvent(message)) {
+      const event = message[2]
+
+      if (!isEphemeralKind(event.kind) && !isDVMKind(event.kind) && verifyEvent(event)) {
+        tracker.track(event.id, socket.url)
+        repository.publish(event)
+      }
+    }
+  })
+})
+
+// Configure the router
+
+const _relayGetter = (fn?: (relay: Relay) => any) =>
+  throttleWithValue(200, () => {
+    let _relays = relays.get()
+
+    if (fn) {
+      _relays = _relays.filter(fn)
+    }
+
+    return sortBy(r => -getRelayQuality(r.url), _relays)
+      .slice(0, 5)
+      .map(r => r.url)
+  })
+
+routerContext.getUserPubkey = () => pubkey.get()
+routerContext.getPubkeyRelays = getPubkeyRelays
+routerContext.getRelayQuality = getRelayQuality
+routerContext.getDefaultRelays = _relayGetter()
+routerContext.getIndexerRelays = _relayGetter()
+routerContext.getSearchRelays = _relayGetter(r =>
+  tryCatch(() => r.profile?.supported_nips?.includes(50)),
+)