Re-work feed requests

packages/app/src/feeds.ts

@@ -1,103 +1,8 @@
-import {nthEq, partition, race, now} from "@welshman/lib"
-import {createEvent, getPubkeyTagValues, TrustedEvent} from "@welshman/util"
-import {request, Tracker} from "@welshman/net"
-import {Scope, FeedController, RequestOpts, FeedOptions, DVMOpts, Feed} from "@welshman/feeds"
-import {Router, addMinimalFallbacks, getFilterSelections} from "@welshman/router"
-import {makeDvmRequest} from "@welshman/dvm"
-import {makeSecret, Nip01Signer} from "@welshman/signer"
+import {Scope, FeedController, FeedControllerOptions, Feed} from "@welshman/feeds"
 import {pubkey, signer} from "./session.js"
-import {loadRelaySelections} from "./relaySelections.js"
 import {wotGraph, maxWot, getFollows, getNetwork, getFollowers} from "./wot.js"
 import {repository} from "./core.js"
 
-export type FeedRequestHandlerOptions = {
-  signal?: AbortSignal
-}
-
-export const makeFeedRequestHandler =
-  ({signal}: FeedRequestHandlerOptions) =>
-  async ({filters = [{}], relays = [], onEvent}: RequestOpts) => {
-    const tracker = new Tracker()
-
-    if (relays.length > 0) {
-      await request({tracker, signal, relays, filters, onEvent, autoClose: true})
-    } else {
-      const promises: Promise<TrustedEvent[]>[] = []
-      const [withSearch, withoutSearch] = partition(f => Boolean(f.search), filters)
-
-      if (withSearch.length > 0) {
-        promises.push(
-          request({
-            signal,
-            tracker,
-            onEvent,
-            threshold: 0.1,
-            autoClose: true,
-            filters: withSearch,
-            relays: Router.get().Search().getUrls(),
-          }),
-        )
-      }
-
-      if (withoutSearch.length > 0) {
-        promises.push(
-          ...getFilterSelections(filters).flatMap(({relays, filters}) =>
-            request({tracker, signal, onEvent, relays, filters, threshold: 0.8, autoClose: true}),
-          ),
-        )
-      }
-
-      // Break out selections by relay so we can complete early after a certain number
-      // of requests complete for faster load times
-      await race(withSearch.length > 0 ? 0.1 : 0.8, promises)
-
-      // Wait until after we've queried the network to access our local cache. This results in less
-      // snappy response times, but is necessary to prevent stale stuff that the user has already seen
-      // from showing up at the top of the feed
-      for (const event of repository.query(filters)) {
-        onEvent(event)
-      }
-    }
-  }
-
-export const requestDVM = async ({kind, onEvent, ...request}: DVMOpts) => {
-  // Make sure we know what relays to use for target dvms
-  if (request.tags && !request.relays) {
-    for (const pubkey of getPubkeyTagValues(request.tags)) {
-      await loadRelaySelections(pubkey)
-    }
-  }
-
-  const tags = request.tags || []
-  const $signer = signer.get() || new Nip01Signer(makeSecret())
-  const pubkey = await $signer.getPubkey()
-  const relays =
-    request.relays ||
-    Router.get().FromPubkeys(getPubkeyTagValues(tags)).policy(addMinimalFallbacks).getUrls()
-
-  if (!tags.some(nthEq(0, "expiration"))) {
-    tags.push(["expiration", String(now() + 60)])
-  }
-
-  if (!tags.some(nthEq(0, "relays"))) {
-    tags.push(["relays", ...relays])
-  }
-
-  if (!tags.some(nthEq(1, "user"))) {
-    tags.push(["param", "user", pubkey])
-  }
-
-  if (!tags.some(nthEq(1, "max_results"))) {
-    tags.push(["param", "max_results", "200"])
-  }
-
-  await makeDvmRequest({
-    relays,
-    event: await $signer.sign(createEvent(kind, {tags})),
-    onResult: onEvent,
-  })
-}
-
 export const getPubkeysForScope = (scope: string) => {
   const $pubkey = pubkey.get()
 
@@ -133,16 +38,13 @@ export const getPubkeysForWOTRange = (min: number, max: number) => {
   return pubkeys
 }
 
-type _FeedOptions = Partial<Omit<FeedOptions, "feed">> & {feed: Feed}
+type MakeFeedControllerOptions = Partial<Omit<FeedControllerOptions, "feed">> & {feed: Feed}
 
-export const createFeedController = (options: _FeedOptions) => {
-  const request = makeFeedRequestHandler(options)
-
-  return new FeedController({
-    request,
-    requestDVM,
+export const makeFeedController = (options: MakeFeedControllerOptions) =>
+  new FeedController({
+    repository,
     getPubkeysForScope,
     getPubkeysForWOTRange,
+    signer: signer.get(),
     ...options,
   })
-}