db/events: support "search" filter

src/db.ts

@@ -6,6 +6,7 @@ import { Conf } from '@/config.ts';
 
 interface DittoDB {
   events: EventRow;
+  events_fts: EventFTSRow;
   tags: TagRow;
   users: UserRow;
   relays: RelayRow;
@@ -21,6 +22,11 @@ interface EventRow {
   sig: string;
 }
 
+interface EventFTSRow {
+  id: string;
+  content: string;
+}
+
 interface TagRow {
   tag: string;
   value_1: string | null;
@@ -43,7 +49,7 @@ interface RelayRow {
 
 const db = new Kysely<DittoDB>({
   dialect: new DenoSqliteDialect({
-    database: new Sqlite(Conf.dbPath),
+    database: new Sqlite(Conf.dbPath) as any,
   }),
 });
 

src/db/events.ts

@@ -25,6 +25,10 @@ function insertEvent(event: Event): Promise<void> {
       })
       .execute();
 
+    await trx.insertInto('events_fts')
+      .values({ id: event.id, content: event.content })
+      .execute();
+
     const tagCounts: Record<string, number> = {};
     const tags = event.tags.reduce<Insertable<TagRow>[]>((results, tag) => {
       const tagName = tag[0];
@@ -111,6 +115,12 @@ function getFilterQuery(filter: DittoFilter) {
     query = query.innerJoin('users', 'users.pubkey', 'events.pubkey');
   }
 
+  if (filter.search) {
+    query = query
+      .innerJoin('events_fts', 'events_fts.id', 'events.id')
+      .where('events_fts.content', 'match', filter.search);
+  }
+
   return query;
 }
 

src/db/migrations/002_events_fts.ts

@@ -0,0 +1,9 @@
+import { Kysely, sql } from '@/deps.ts';
+
+export async function up(db: Kysely<any>): Promise<void> {
+  await sql`CREATE VIRTUAL TABLE events_fts USING fts5(id, content)`.execute(db);
+}
+
+export async function down(db: Kysely<any>): Promise<void> {
+  await db.schema.dropTable('events_fts').execute();
+}

src/deps.ts

@@ -50,7 +50,10 @@ export {
 export { generateSeededRsa } from 'https://gitlab.com/soapbox-pub/seeded-rsa/-/raw/v1.0.0/mod.ts';
 export * as secp from 'npm:@noble/secp256k1@^2.0.0';
 export { LRUCache } from 'npm:lru-cache@^10.0.0';
-export { DB as Sqlite, SqliteError } from 'https://deno.land/x/sqlite@v3.7.3/mod.ts';
+export {
+  DB as Sqlite,
+  SqliteError,
+} from 'https://raw.githubusercontent.com/teleclimber/deno-sqlite/5283320fce74fbfd90b62d379e8703d386ed0b27/mod.ts';
 export * as dotenv from 'https://deno.land/std@0.198.0/dotenv/mod.ts';
 export {
   FileMigrationProvider,