Get rid of unnecessary memorelay module, replace with NCache

src/deps.ts

@@ -94,6 +94,6 @@ export {
   NSet,
   type NStore,
   type NStoreOpts,
-} from 'https://gitlab.com/soapbox-pub/nlib/-/raw/554ec56cd92ff0a65e8b74765da3b854f50e4a2a/mod.ts';
+} from 'https://gitlab.com/soapbox-pub/nlib/-/raw/91ddffb8d7091286641fdc419bdde07c8037eac7/mod.ts';
 
 export type * as TypeFest from 'npm:type-fest@^4.3.0';

src/pipeline.ts

@@ -7,7 +7,7 @@ import { DittoEvent } from '@/interfaces/DittoEvent.ts';
 import { isEphemeralKind } from '@/kinds.ts';
 import { isLocallyFollowed } from '@/queries.ts';
 import { updateStats } from '@/stats.ts';
-import { client, eventsDB, memorelay, reqmeister } from '@/storages.ts';
+import { cache, client, eventsDB, reqmeister } from '@/storages.ts';
 import { Sub } from '@/subs.ts';
 import { getTagSet } from '@/tags.ts';
 import { eventAge, isRelay, nostrDate, nostrNow, Time } from '@/utils.ts';
@@ -45,8 +45,8 @@ async function handleEvent(event: DittoEvent, signal: AbortSignal): Promise<void
 
 /** Encounter the event, and return whether it has already been encountered. */
 async function encounterEvent(event: NostrEvent, signal: AbortSignal): Promise<boolean> {
-  const preexisting = (await memorelay.count([{ ids: [event.id] }])) > 0;
-  memorelay.event(event, { signal });
+  const preexisting = (await cache.count([{ ids: [event.id] }])) > 0;
+  cache.event(event);
   reqmeister.event(event, { signal });
   return preexisting;
 }
@@ -149,7 +149,7 @@ function fetchRelatedEvents(event: DittoEvent, signal: AbortSignal) {
     reqmeister.req({ kinds: [0], authors: [event.pubkey] }, { signal }).catch(() => {});
   }
   for (const [name, id, relay] of event.tags) {
-    if (name === 'e' && !memorelay.count([{ ids: [id] }], { signal })) {
+    if (name === 'e' && !cache.count([{ ids: [id] }])) {
       reqmeister.req({ ids: [id] }, { relays: [relay] }).catch(() => {});
     }
   }

src/queries.ts

@@ -1,4 +1,4 @@
-import { eventsDB, memorelay, reqmeister } from '@/storages.ts';
+import { cache, eventsDB, reqmeister } from '@/storages.ts';
 import { Debug, type NostrEvent } from '@/deps.ts';
 import { type AuthorMicrofilter, type IdMicrofilter } from '@/filter.ts';
 import { type DittoEvent } from '@/interfaces/DittoEvent.ts';
@@ -25,7 +25,7 @@ const getEvent = async (
   const { kind, relations, signal = AbortSignal.timeout(1000) } = opts;
   const microfilter: IdMicrofilter = { ids: [id] };
 
-  const [memoryEvent] = await memorelay.query([microfilter], opts) as DittoEvent[];
+  const [memoryEvent] = await cache.query([microfilter]) as DittoEvent[];
 
   if (memoryEvent && !relations) {
     debug(`getEvent: ${id.slice(0, 8)} found in memory`);
@@ -43,7 +43,7 @@ const getEvent = async (
   // TODO: make this DRY-er.
 
   if (dbEvent && !dbEvent.author) {
-    const [author] = await memorelay.query([{ kinds: [0], authors: [dbEvent.pubkey] }], opts);
+    const [author] = await cache.query([{ kinds: [0], authors: [dbEvent.pubkey] }]);
     dbEvent.author = author;
   }
 
@@ -53,7 +53,7 @@ const getEvent = async (
   }
 
   if (memoryEvent && !memoryEvent.author) {
-    const [author] = await memorelay.query([{ kinds: [0], authors: [memoryEvent.pubkey] }], opts);
+    const [author] = await cache.query([{ kinds: [0], authors: [memoryEvent.pubkey] }]);
     memoryEvent.author = author;
   }
 
@@ -77,7 +77,7 @@ const getAuthor = async (pubkey: string, opts: GetEventOpts = {}): Promise<Nostr
   const { relations, signal = AbortSignal.timeout(1000) } = opts;
   const microfilter: AuthorMicrofilter = { kinds: [0], authors: [pubkey] };
 
-  const [memoryEvent] = await memorelay.query([microfilter], opts);
+  const [memoryEvent] = await cache.query([microfilter]);
 
   if (memoryEvent && !relations) {
     return memoryEvent;

src/storages.ts

@@ -1,9 +1,9 @@
 import { Conf } from '@/config.ts';
 import { db } from '@/db.ts';
+import { NCache } from '@/deps.ts';
 import * as pipeline from '@/pipeline.ts';
 import { activeRelays, pool } from '@/pool.ts';
 import { EventsDB } from '@/storages/events-db.ts';
-import { Memorelay } from '@/storages/memorelay.ts';
 import { Optimizer } from '@/storages/optimizer.ts';
 import { PoolStore } from '@/storages/pool-store.ts';
 import { Reqmeister } from '@/storages/reqmeister.ts';
@@ -21,7 +21,7 @@ const client = new PoolStore({
 const eventsDB = new EventsDB(db);
 
 /** In-memory data store for cached events. */
-const memorelay = new Memorelay({ max: 3000 });
+const cache = new NCache({ max: 3000 });
 
 /** Batches requests for single events. */
 const reqmeister = new Reqmeister({
@@ -33,7 +33,7 @@ const reqmeister = new Reqmeister({
 /** Main Ditto storage adapter */
 const optimizer = new Optimizer({
   db: eventsDB,
-  cache: memorelay,
+  cache,
   client: reqmeister,
 });
 
@@ -43,4 +43,4 @@ const searchStore = new SearchStore({
   fallback: optimizer,
 });
 
-export { client, eventsDB, memorelay, optimizer, reqmeister, searchStore };
+export { cache, client, eventsDB, optimizer, reqmeister, searchStore };

src/storages/memorelay.test.ts

@@ -1,22 +0,0 @@
-import { assertEquals } from '@/deps-test.ts';
-
-import event1 from '~/fixtures/events/event-1.json' assert { type: 'json' };
-
-import { Memorelay } from './memorelay.ts';
-
-const memorelay = new Memorelay({
-  max: 3000,
-  maxEntrySize: 5000,
-  sizeCalculation: (event) => JSON.stringify(event).length,
-});
-
-Deno.test('memorelay', async () => {
-  assertEquals(await memorelay.count([{ ids: [event1.id] }]), 0);
-
-  await memorelay.event(event1);
-
-  assertEquals(await memorelay.count([{ ids: [event1.id] }]), 1);
-
-  const result = await memorelay.query([{ ids: [event1.id] }]);
-  assertEquals(result[0], event1);
-});

src/storages/memorelay.ts

@@ -1,118 +0,0 @@
-import {
-  Debug,
-  LRUCache,
-  matchFilter,
-  type NostrEvent,
-  type NostrFilter,
-  NSet,
-  type NStore,
-  type NStoreOpts,
-} from '@/deps.ts';
-import { normalizeFilters } from '@/filter.ts';
-import { abortError } from '@/utils/abort.ts';
-
-/** In-memory data store for events. */
-class Memorelay implements NStore {
-  #debug = Debug('ditto:memorelay');
-  #cache: LRUCache<string, NostrEvent>;
-
-  constructor(...args: ConstructorParameters<typeof LRUCache<string, NostrEvent>>) {
-    this.#cache = new LRUCache<string, NostrEvent>(...args);
-  }
-
-  /** Iterate stored events. */
-  *#events(): Generator<NostrEvent> {
-    for (const event of this.#cache.values()) {
-      if (event && !(event instanceof Promise)) {
-        yield event;
-      }
-    }
-  }
-
-  /** Get events from memory. */
-  query(filters: NostrFilter[], opts: NStoreOpts = {}): Promise<NostrEvent[]> {
-    if (opts.signal?.aborted) return Promise.reject(abortError());
-
-    filters = normalizeFilters(filters);
-    this.#debug('REQ', JSON.stringify(filters));
-    if (!filters.length) return Promise.resolve([]);
-
-    /** Event results to return. */
-    const results = new NSet();
-
-    /** Number of times an event has been added to results for each filter. */
-    const filterUsages: number[] = [];
-
-    /** Check if all filters have been satisfied. */
-    function checkSatisfied() {
-      return results.size >= (opts.limit ?? Infinity) ||
-        filters.every((filter, index) => filter.limit && (filterUsages[index] >= filter.limit));
-    }
-
-    // Optimize for filters with IDs.
-    filters.forEach((filter, index) => {
-      if (filter.ids) {
-        for (const id of filter.ids) {
-          const event = this.#cache.get(id);
-          if (event && matchFilter(filter, event)) {
-            results.add(event);
-          }
-        }
-        filterUsages[index] = Infinity;
-      }
-    });
-
-    // Return early if all filters are satisfied.
-    if (checkSatisfied()) {
-      return Promise.resolve([...results]);
-    }
-
-    // Seek through all events in memory.
-    for (const event of this.#events()) {
-      filters.forEach((filter, index) => {
-        const limit = filter.limit ?? Infinity;
-        const usage = filterUsages[index] ?? 0;
-
-        if (usage >= limit) {
-          return;
-        } else if (matchFilter(filter, event)) {
-          results.add(event);
-          this.#cache.get(event.id);
-          filterUsages[index] = usage + 1;
-        }
-
-        index++;
-      });
-
-      // Check after each event if we can return.
-      if (checkSatisfied()) {
-        break;
-      }
-    }
-
-    return Promise.resolve([...results]);
-  }
-
-  /** Insert an event into memory. */
-  event(event: NostrEvent, opts: NStoreOpts = {}): Promise<void> {
-    if (opts.signal?.aborted) return Promise.reject(abortError());
-    this.#cache.set(event.id, event);
-    return Promise.resolve();
-  }
-
-  /** Count events in memory for the filters. */
-  async count(filters: NostrFilter[], opts?: NStoreOpts): Promise<number> {
-    const events = await this.query(filters, opts);
-    return events.length;
-  }
-
-  /** Delete events from memory. */
-  async remove(filters: NostrFilter[], opts: NStoreOpts): Promise<void> {
-    for (const event of await this.query(filters, opts)) {
-      this.#cache.delete(event.id);
-    }
-    return Promise.resolve();
-  }
-}
-
-export { Memorelay };