filmout_display/test/test_messages.js

const net = require('net');
const  { resolve } = require('path');

/**

Actions

0 =    NONE,
1 =    LOAD,
2 =    DISPLAY,
3 =    STOP

**/

const serverAddress = 'localhost';
const serverPort = 8081;

const client = new net.Socket();
let sent = 0;

console.log(`Connecting to ${serverAddress}:${serverPort}...`);

async function delay (ms) {
    return new Promise((resolve, reject) => {
        return setTimeout(resolve, ms);
    });
}

function send (data) {
    const str = JSON.stringify(data);
    sent = +new Date();
    console.log(`[${sent}]  SENDING ` + str);
    client.write(str);
}

function actionLoad (img, x, y, w, h) {
    const obj = {
        action : 1, //LOAD
        image : resolve(img),
        position : {
            x,
            y,
            w,
            h
        }
    };
    send(obj);
}

function actionExpose (img, exposure) {
    const obj = {
        action : 2, //DISPLAY
        image : resolve(img),
        exposure : [ exposure ]
    };
    send(obj);
}

function actionStart (img) {
    const obj = {
        action : 2, //DISPLAY
        image : resolve(img)
    };
    send(obj);
}

function actionStop (img) {
    const obj = {
        action : 3, //STOP
        image : resolve(img)
    }
    send(obj);
}

client.connect(serverPort, serverAddress, async () => {
    const img = './img/4kSnake.png';
    actionLoad(img, 0, 0, 320, 320);
    //
    await delay(2000);
    actionExpose(img, 4000);
    //actionStart(img);
    //
    await delay(8000);
    actionLoad(img, 100, 100, 640, 640);
    //
    await delay(1000);
    actionStart(img);
    //
    await delay(2000);
    actionStop(img);
});

client.on('data', (data) => {
    const received = +new Date();
    console.log(`[${received}] RECEIVED ` + data.toString());
    console.log(`DIFF ${received - sent}`);
});

client.on('close', () => {
    console.log('Closing connection');
});

client.on('error', (err) => {
    console.error('Error:', err);
});