Build a Chat App for Android using React Native

Build a Chat App for Android using React Native

Table of Contents:

1. Introduction
2. Setting up a Node Express application 2.1. Installing necessary packages 2.2. Creating folder structure 2.3. Configuring JSON web token secrets
3. Handling route restrictions 3.1. Creating user registration route 3.2. Validating request body 3.3. Checking for existing user 3.4. Hashing passwords 3.5. Inserting user into the database
4. Setting up login route 4.1. Validating request body 4.2. Checking for existing user 4.3. Comparing passwords 4.4. Creating token for authorized user 4.5. Returning token and user information
5. Creating a Helper function for managing users 5.1. Adding users to the active rooms 5.2. Retrieving users from the active rooms 5.3. Pushing new users into the active rooms

Setting up a Node Express Application

In this article, we will discuss how to set up a simple Node Express application for our back-end. We will be focusing on creating routes for user registration and login. Additionally, we will Create a helper function for managing users within the active rooms.

To begin with, we need to install the necessary packages and set up our folder structure. This will include installing "phas" for password hashing and creating a default JSON file to store our JSON web token secrets. We will also create the required folders for our routes.

Handling Route Restrictions

Now that our application is set up, we can focus on handling route restrictions. We will start by creating the user registration route. This route will be a public access route that allows users to register by making a POST request to the API endpoint. We will validate the request body and check for existing users before inserting the new user into the database.

Next, we will set up the login route, which is also a public route. Similar to the registration route, we will validate the request body and check for the existence of the user. We will then compare the passwords and create a token for authorized users. The token and user information will be returned in the response.

Creating a Helper Function for Managing Users

In order to manage users within the active rooms, we will create a helper function. This function will allow us to add users to the active rooms and retrieve users from the active rooms. We will also include a function to push new users into the active rooms.

By utilizing this helper function, we can easily manage the users within our application and ensure smooth communication between users.

Conclusion

Setting up a Node Express application and handling route restrictions are crucial steps in developing a robust back-end system. By following the steps outlined in this article, You will be able to create a secure user registration and login process. Additionally, the helper function for managing users will enhance the overall user experience.

Remember to subscribe and like our Channel for more informative videos and tutorials on Node Express development. Stay tuned for the next video where we will discuss implementing socket.io for real-time communication.