rework context

packages/app/src/context.ts

@@ -0,0 +1,45 @@
+import {partition} from "@welshman/lib"
+import {defaultOptimizeSubscriptions, getDefaultNetContext as originalGetDefaultNetContext} from "@welshman/net"
+import type {Subscription, RelaysAndFilters} from "@welshman/net"
+import {unionFilters, isSignedEvent, hasValidSignature} from "@welshman/util"
+import type {TrustedEvent} from "@welshman/util"
+import {tracker, repository} from './core'
+import {makeRouter, getFilterSelections} from './router'
+import {onAuth, getSession} from './session'
+import type {Router} from './router'
+
+export type AppContext = {
+  router: Router
+  requestDelay: number
+  requestTimeout: number
+  dufflepudUrl?: string
+}
+
+export const getDefaultNetContext = () => ({
+  ...originalGetDefaultNetContext(),
+  onAuth: onAuth,
+  onEvent: (url: string, event: TrustedEvent) => tracker.track(event.id, url),
+  isDeleted: (url: string, event: TrustedEvent) => repository.isDeleted(event),
+  hasValidSignature: (event: TrustedEvent) =>
+    getSession(event.pubkey) || (isSignedEvent(event) && hasValidSignature(event)),
+  optimizeSubscriptions: (subs: Subscription[]) => {
+    const [withRelays, withoutRelays] = partition(sub => sub.request.relays.length > 0, subs)
+    const filters = unionFilters(withoutRelays.flatMap(sub => sub.request.filters))
+    const selections: RelaysAndFilters[] = defaultOptimizeSubscriptions(withRelays)
+
+    if (filters.length > 0) {
+      for (const selection of  getFilterSelections(filters)) {
+        selections.push(selection)
+      }
+    }
+
+    return selections
+  },
+})
+
+export const getDefaultAppContext = () => ({
+  router: makeRouter(),
+  requestDelay: 50,
+  requestTimeout: 3000,
+})
+