App has been divided into 2 parts Express Node based Server and React based client.

server runs on port 3000

Client directory reside ./client . Client runs on port 3001 Client talks to server on port 3000

MySql DB details (no password)

user: "root",

database: "commenting"

1. clone the repo
2. clone the DB with .sql file
3. npm i in root
4. start the server by npm start
5. npm i in /client directory
6. start the client by npm start
7. open localhost:3001 to see the demo.

Post
    id
    content

Comment
    id
    Parent: PostId | Comment id
    content
    userId

Server side API is served with 4 operations

1. get-id gets all comments with parent id id provided

2. delete deletes the comment with provided id

3. update updates the comment with provided id and content

4. create creates a new comment provided content and parent (also used for replying)

   It USes Mysql to store and query the data and provides response in JSON format

Client has Main React Component as APP Which renders the initial comment as static Post. Comment component requires props

1. id- unique id
2. userId- user who created that comment
3. content
4. onUpdate - call back function when update is done.

It makes call to server based on its id and fetches child comment renders itself and recursively children make call and render themselves.