API for react-chat ===> https://github.com/Vekaltor/react-chat

API working with database mongoDB, it contains services that allow user authorization (login/registration). And for connectivity to the socket.io server that allows real-time interactions between users.

Project is created with:

• JavaScript (ES6)
• express: 4.18.2
• mongoose version: 6.9.3
• nodemailer version: 6.9.1
• bcrypt version: 5.1.0
• socket.io version: 4.6.1
• redis version: 4.6.5
• i18next version: 22.4.10
• Database - MONGODB />

To run this API, install it locally using npm:

$ cd ../{folder-project}

$ npm install

$ npm start

With i18next messages with responses are translated on correctly language.

Thanks to the middleware, each request sent to the API is verified whether the user is authorized - tokens (access, refresh) are stored in httponly cookies.

API has a validator implemented, uses the @hapi/joi library, the correctness of the form fields is checked with each request, if an error occurs, the server returns an object with errors regarding each field.

It allows you to send an email to the user with the given email, with a message about the activation of the account, the link includes the expiration time.

The API uses a socket.io server that allows users to communicate allows events such as:

Users can write to each other, each message is assigned to a specific room with a conversation id, also each message sent increments unread messages for inactive users of this conversation. It also emits an event that shows notifications about the number of unread messages for a specific user from a given conversation

In the near future: Redis will store messages for a given conversation and cyclically save them to the database (and the user starting a given conversation will download all messages from Redis)

Broadcasts to all friends of a given user information that this user is online - similarly to disconnecting from socket.io.

Each user has access to the offline-friend and online-friend events.

The get-online-friends event, on the other hand, is used to fetch the entire online friends list from the previously uploaded friends list from the user.