Fis-SearchUtility/test/publisher.ts

import { BehaviorSubject, Subject, buffer, bufferWhen, elementAt, filter } from 'rxjs';
import * as WebSocket from 'ws';
import { DataPrepService } from '../services/dataprep.service';
import { StorageLocation } from '../types/interface';
let msgData = new DataPrepService()

/* ---------------------- COMPLEX OPERATION ------------------------------ */
let msgPayload: Subject<any> = new Subject();
let consumerTrafficStatus: Subject<any> = new Subject()
let bufferTrigger: BehaviorSubject<boolean> = new BehaviorSubject(true)

let mongoStorage: StorageLocation = {
    type: `MongoDB`,
    url: `mongodb://192.168.100.59:27017/default`
}
msgData.loadObsData(mongoStorage, msgPayload)

consumerTrafficStatus.subscribe((element) => {
    if (element >= 1.5) {
        let warning: boolean = false
        bufferTrigger.next(warning)
        console.log(`Buffering.....`)
    } else {
        let warning: boolean = true
        bufferTrigger.next(warning)
        // console.log(`Releasing the buffer`)
    }
})


// Create a WebSocket server
function createWebsocketServer() {
    const wss = new WebSocket.Server({ port: 8080 });

    // Listen for connections to the WebSocket server
    wss.on('connection', (ws: WebSocket) => {
        console.log('Client connected');

        // Subscribe to the subject when a client connects
        const subscription = msgPayload.pipe(
            buffer(bufferTrigger.pipe(filter(Boolean)))
        ).subscribe((element) => {
            console.log(`Emitting ${element.length} messages`)
            let messageString = JSON.stringify(element)
            ws.send(messageString);
        });

        // Listen for messages from the client
        ws.on('message', (message: any) => {
            console.log(`Received message from client: ${message}`);
        });

        // Unsubscribe from the subject when the client disconnects
        ws.on('close', () => {
            console.log('Client disconnected');
            subscription.unsubscribe();
        });
    });
}


// Create a new WebSocket client
function connectWebSocket() {
    // Create a new WebSocket client
    const ws = new WebSocket('ws://localhost:8081');

    // Listen for the WebSocket connection to open
    ws.on('open', () => {
        console.log('Connecting to Consumer WebSocket server');

        // Send a message to the server
        ws.send('Hello, consumer server!');
    })

    // Listen for messages from the server
    ws.on('message', (message: string) => {
        let msgObj: number = JSON.parse(message)
        consumerTrafficStatus.next(msgObj)
    });

    // Listen for WebSocket errors
    ws.on('error', (element) => {
        console.error('WebSocket error:', element);
    })


    // Listen for the WebSocket connection to close
    ws.on('close', () => {
        console.log('Disconnected from WebSocket server');
        setTimeout(connectWebSocket, 1000); // Attempt to reconnect after 1 second
    })
}

createWebsocketServer()
connectWebSocket();