New getRecentStoryReplies function to clean up replies in multiple convos

ts/sql/migrations/86-story-replies-index.ts

@@ -0,0 +1,32 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { Database } from '@signalapp/better-sqlite3';
+
+import type { LoggerType } from '../../types/Logging';
+
+export default function updateToSchemaVersion86(
+  currentVersion: number,
+  db: Database,
+  logger: LoggerType
+): void {
+  if (currentVersion >= 86) {
+    return;
+  }
+
+  db.transaction(() => {
+    // The key reason for this new schema is that all of our previous schemas start with
+    //   conversationId. This query is meant to find all replies to a given story, no
+    //   matter the conversation.
+    db.exec(
+      `CREATE INDEX messages_story_replies
+        ON messages (storyId, received_at, sent_at)
+        WHERE isStory IS 0;
+      `
+    );
+
+    db.pragma('user_version = 86');
+  })();
+
+  logger.info('updateToSchemaVersion86: success!');
+}

ts/sql/migrations/index.ts

@@ -61,6 +61,7 @@ import updateToSchemaVersion82 from './82-edited-messages-read-index';
 import updateToSchemaVersion83 from './83-mentions';
 import updateToSchemaVersion84 from './84-all-mentions';
 import updateToSchemaVersion85 from './85-add-kyber-keys';
+import updateToSchemaVersion86 from './86-story-replies-index';
 
 function updateToSchemaVersion1(
   currentVersion: number,
@@ -1992,6 +1993,7 @@ export const SCHEMA_VERSIONS = [
   updateToSchemaVersion83,
   updateToSchemaVersion84,
   updateToSchemaVersion85,
+  updateToSchemaVersion86,
 ];
 
 export function updateSchema(db: Database, logger: LoggerType): void {