[next] MongoDB Indexes (#2142)

* feat: added mongo indexing support

* fix: fixed typescript issue

* chore: better types

* fix: revert debug stuff

* fix: addressed ts error

* feat: added config option to disable auto-indexing

* chore: reordered imports

* refactor: cleaned up some filepaths

src/core/server/services/mongodb/indexes.ts

@@ -0,0 +1,45 @@
+import { Db } from "mongodb";
+
+import logger from "talk-server/logger";
+import { createCommentActionIndexes } from "talk-server/models/action/comment";
+import { createCommentModerationActionIndexes } from "talk-server/models/action/moderation/comment";
+import { createCommentIndexes } from "talk-server/models/comment";
+import {
+  createStoryCountIndexes,
+  createStoryIndexes,
+} from "talk-server/models/story";
+import { createTenantIndexes } from "talk-server/models/tenant";
+import { createUserIndexes } from "talk-server/models/user";
+
+type IndexCreationFunction = (mongo: Db) => Promise<void>;
+
+const indexes: Array<[string, IndexCreationFunction]> = [
+  ["users", createUserIndexes],
+  ["tenants", createTenantIndexes],
+  ["comments", createCommentIndexes],
+  ["stories", createStoryIndexes],
+  ["stories", createStoryCountIndexes],
+  ["commentActions", createCommentActionIndexes],
+  ["commentModerationActions", createCommentModerationActionIndexes],
+];
+
+/**
+ * ensureIndexes will ensure that all indexes have been created.
+ *
+ * @param mongo a MongoDB Database Connection
+ */
+export async function ensureIndexes(mongo: Db) {
+  logger.debug(
+    { indexGroupCount: indexes.length },
+    "now ensuring indexes are created"
+  );
+
+  // For each of the index functions, call it.
+  for (const [indexGroup, indexFunction] of indexes) {
+    logger.debug({ indexGroup }, "ensuring indexes are created");
+    await indexFunction(mongo);
+    logger.debug({ indexGroup }, "indexes have been created");
+  }
+
+  logger.debug("all indexes have been created");
+}

src/core/server/services/tenant/index.ts

@@ -50,6 +50,10 @@ export async function install(
     );
   }
 
+  // TODO: (wyattjoh) perform any pending migrations.
+
+  // TODO: (wyattjoh) setup database indexes.
+
   // Create the Tenant.
   const tenant = await createTenant(mongo, input);