[keyserver][script] get IDs for community names

Summary:
we want to harcode a list of crypto community IDs so that we can display the associated communities in a tab for crypto users. i have a list of crypto community names, and need to turn this into a list of IDs

https://linear.app/comm/issue/ENG-9953/get-list-of-crypto-communities-from-ashoat-and-rahul

Test Plan: ran this locally with a couple community names and got back the corresponding IDs

Reviewers: ashoat

Reviewed By: ashoat

Subscribers: tomek

Differential Revision: https://phab.comm.dev/D14145

keyserver/src/scripts/get-community-ids.js

@@ -0,0 +1,47 @@
+// @flow
+
+import { main } from './utils.js';
+import { dbQuery, SQL } from '../database/database.js';
+
+async function fetchCommunityIDsByNames(
+  communityNames: $ReadOnlyArray<string>,
+): Promise<{
+  communityIDs: $ReadOnlyArray<string>,
+  unresolvedNames: $ReadOnlyArray<string>,
+}> {
+  if (communityNames.length === 0) {
+    return { communityIDs: [], unresolvedNames: [] };
+  }
+
+  const query = SQL`
+    SELECT t.name, c.id
+    FROM communities c
+    INNER JOIN threads t
+      ON c.id = t.id
+    WHERE t.name IN (${communityNames})
+      AND c.farcaster_channel_id IS NOT NULL
+  `;
+
+  const [result] = await dbQuery(query);
+
+  const resolvedNames = result.map(row => row.name);
+  const communityIDs = result.map(row => row.id.toString());
+  const unresolvedNames = communityNames.filter(
+    name => !resolvedNames.includes(name),
+  );
+
+  return { communityIDs, unresolvedNames };
+}
+
+async function fetchCommunityIDsByNamesScript() {
+  const communityNames: $ReadOnlyArray<string> = []; // Replace with actual community names
+  const { communityIDs, unresolvedNames } =
+    await fetchCommunityIDsByNames(communityNames);
+  console.log('Fetched Community IDs:', communityIDs);
+
+  if (unresolvedNames.length > 0) {
+    console.log('Unresolved Community Names:', unresolvedNames);
+  }
+}
+
+main([fetchCommunityIDsByNamesScript]);