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connection.js

@@ -0,0 +1,47 @@
+const mongoose = require('mongoose');
+
+let db;
+
+const mongoOptions = {
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+};
+
+const connectToServer = (callback) => {
+    if (db) {
+        console.warn('Already connected to the database');
+        return callback();
+    }
+
+    const connectionUrl = process.env.MONGODB_PASSWORD
+        ? `mongodb://${process.env.MONGODB_USERNAME}:${process.env.MONGODB_PASSWORD}@${process.env.MONGODB_HOST}:${process.env.MONGODB_PORT}/${process.env.MONGODB_NAME}?authMechanism=DEFAULT&authSource=admin`
+        : `mongodb://${process.env.HOST}/${process.env.DB_NAME}`;
+
+    const message = process.env.MONGODB_PASSWORD
+        ? 'Mongodb connected with password'
+        : 'Mongodb connected without password'
+
+    mongoose.connect(connectionUrl, mongoOptions, (err) => {
+        if (err) {
+            console.error('Error connecting to MongoDB:', err);
+        } else {
+            console.log(message);
+            db = mongoose.connection;
+        }
+        return callback(err);
+    });
+};
+
+const disconnectFromServer = () => {
+    if (db) {
+        mongoose.disconnect();
+        console.log('Disconnected from MongoDB');
+    } else {
+        console.warn('Not connected to the database');
+    }
+};
+
+module.exports = {
+    connectToServer,
+    disconnectFromServer,
+};