Protected Text

Protected Text is a small one page application for storing encrypted notes. First you have to choose url where your notes will be stored. If it's not busy - it's yours. Then create notes, choose password and saved them. After you can access them anywhere. All notes are stored encrypted, nobody can't access them except you, application doesn't store your password.

Main idea

I wanted to try finite state machines for building web applications (controlling their behavior and logic) on real example, that's why I've chosen this simple idea. All application logic such as creating notes, saving them, etc. is controlled in the state machine. We just have to render UI according to this state. Using state machines for building application gives you more control over different user cases. What especially important is that we can write unit tests for all of them. It increases stability of your code.

Demo

You can see it in work here where I've deployed this application. Currently it doesn't use real database and stores all data in memory, so don't try to use it - it's just a demonstration.

Client side

For developing client side of this application I've choosen next:

React - for building UI of application
Material UI - as a set of ready to use React components
XState - for managing state of application
Webpack - for building application
React Router - for managing routing on client side

Server side

For developing server side of this application I've used next set:

Express - minimalistic web framework for building servers that handles api calls and serves static files
Keyv - consistent interface for key-value storages to store encrypted data

Testing

For testing code of the application (client and server parts) I've used next:

Jest - JavaScript testing framework
SuperTest - library for testing node.js HTTP servers

Most important part of testing in this project is unit tests for xstate machine which manages application logic. You can find them in src/client/machine directory. If you want to run tests you can use next:

    npm run test

Using on your local machine or server

In order to see this small application you have to install git and nodejs on your PC at first and then clone this repository

    git clone git@github.com:andreycrane/protected_text.git

After you've cloned repository go to project directory

    cd notes_demo

and install all dependencies using npm

    npm i

When installation process will be finished you can start local server by typing next command in terminal:

    npm run build:production && npm run server:production

After you can go to your browser and open localhost:5000 address. That's it!