refactor: pass db object to mongo db store

BREAKING CHANGE: init no longer accepts a database uri, pass a db object instead

Author: lukashass

src/MigrationStore.ts

@@ -7,7 +7,7 @@ export interface MigrationModel {
 }
 
 export interface MigrationStore {
-  init(options: Record<string, unknown>): Promise<void>;
+  init(options: Record<string, unknown>): Promise<void> | void;
   getAppliedMigrations(): Promise<MigrationModel[]>;
   insertMigration(migration: Migration): Promise<void>;
 }

src/MongoMigrationStore.ts

@@ -1,29 +1,13 @@
-import { Collection, MongoClient, MongoClientOptions } from 'mongodb';
+import { Collection, Db } from 'mongodb';
 
 import { Migration } from './Migration';
 import { MigrationModel, MigrationStore } from './MigrationStore';
 
 export class MongoMigrationStore implements MigrationStore {
   private collection?: Collection<MigrationModel>;
 
-  async init({
-    uri,
-    database,
-    migrationsCollection,
-    options,
-  }: {
-    uri: string;
-    database: string;
-    migrationsCollection: string;
-    options?: MongoClientOptions;
-  }): Promise<void> {
-    try {
-      const client = await MongoClient.connect(uri, options);
-      const db = client.db(database);
-      this.collection = db.collection(migrationsCollection);
-    } catch (e) {
-      throw new Error(e);
-    }
+  init({ db, migrationsCollection }: { db: Db; migrationsCollection: string }): void {
+    this.collection = db.collection(migrationsCollection);
   }
 
   getAppliedMigrations(): Promise<MigrationModel[]> {