starting to integrate old api

packages/api/services/database.service.ts

@@ -0,0 +1,33 @@
+// External Dependencies
+import * as mongoDB from 'mongodb';
+
+import environmentVariables from '../config';
+
+// Global Variables
+export const collections: {
+  users?: mongoDB.Collection;
+  lines?: mongoDB.Collection;
+  lineMembers?: mongoDB.Collection;
+} = {};
+
+// Initialize Connection
+export const client: mongoDB.MongoClient = new mongoDB.MongoClient(
+  environmentVariables.MONGO_CONNECTION_STRING,
+);
+
+client.connect();
+
+const db: mongoDB.Db = client.db(process.env.DB_NAME);
+
+const usersCollection: mongoDB.Collection = db.collection('users');
+const lineCollection: mongoDB.Collection = db.collection('lines');
+const lineMembersCollection: mongoDB.Collection = db.collection('lineMembers');
+
+collections.users = usersCollection;
+collections.lines = lineCollection;
+collections.lineMembers = lineMembersCollection;
+
+console.log(
+  `Successfully connected to database: ${db.databaseName} and collections: `,
+  Object.keys(collections).forEach((coll) => console.log(coll)),
+);