Update connection.js to list databases

connection.js

@@ -6,7 +6,7 @@ async function main(){
      * See https://docs.mongodb.com/ecosystem/drivers/node/ for more details
      */
     const uri = "mongodb+srv://<username>:<password>@<your-cluster-url>/test?retryWrites=true&w=majority";
-
+  
     /**
      * The Mongo Client you will use to interact with your database
      * See https://mongodb.github.io/node-mongodb-native/3.3/api/MongoClient.html for more details
@@ -17,11 +17,8 @@ async function main(){
         // Connect to the MongoDB cluster
         await client.connect();
 
-        // Access the listingsAndReviews collection that is stored in the sample_airbnb DB
-        let collection = client.db("sample_airbnb").collection("listingsAndReviews");
-
         // Make the appropriate DB calls
-        await printFiveListings(collection);
+        await listDatabases(client);
 
     } catch (e) {
         console.error(e);
@@ -34,13 +31,12 @@ async function main(){
 main().catch(console.err);
 
 /**
- * Print the names of five Airbnb listings
- * @param {Collection} collection The collection to search
+ * Print the names of all available databases
+ * @param {MongoClient} client A MongoClient that is connected to a cluster with the sample_airbnb database
  */
-async function printFiveListings(collection){
-    let cursor = await collection.find({}).limit(5);
-    let docs = await cursor.toArray();
+async function listDatabases(client){
+    databases = await client.db("sample_airbnb").admin().listDatabases();
 
-    console.log("Found Airbnb listings in the database:");
-    docs.forEach(doc => console.log(` - ${doc.name}`));
+    console.log("Databases:");
+    databases.databases.forEach(db => console.log(` - ${db.name}`));
 };