Add connection.js

Author: ljhaywar

connection.js

@@ -0,0 +1,46 @@
+const {MongoClient} = require('mongodb');
+
+async function main(){
+    /**
+     * Connection URI. Update <username>, <password>, and <your-cluster-url> to reflect your cluster.
+     * 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
+     */
+    const client = new MongoClient(uri);
+
+    try {
+        // 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);
+
+    } catch (e) {
+        console.error(e);
+    } finally {
+        // Close the connection to the MongoDB cluster
+        await client.close();
+    }
+}
+
+main().catch(console.err);
+
+/**
+ * Print the names of five Airbnb listings
+ * @param {Collection} collection The collection to search
+ */
+async function printFiveListings(collection){
+    let cursor = await collection.find({}).limit(5);
+    let docs = await cursor.toArray();
+
+    console.log("Found Airbnb listings in the database:");
+    docs.forEach(doc => console.log(` - ${doc.name}`));
+};