Function plotOrderBook

cli/ts/charts/orderbook.ts:10–63

(exchangeNames: string, symbol: string, args: any, cliOptions: any)

const defaultDepth = 15;

async function plotOrderBook (exchangeNames: string, symbol: string, args: any, cliOptions: any) {
    spinner.start ();
    const exchangeIds = exchangeNames.split (',');

    const exchangePromises = exchangeIds.map ((id) => loadSettingsAndCreateExchange (id, cliOptions));

    const exchanges = await Promise.all (exchangePromises);

    const depth = args[0] ?? defaultDepth;
    const boxWidth = 35;
    const boxHeight = depth * 2 + 7;

    const screen = blessed.screen ({
        'smartCSR': true,
        'title': `Order Book - ${symbol}`,
    });

    // append screens
    const boxes = [];
    for (let i = 0; i < exchanges.length; i++) {
        const box = blessed.box ({
            'top': 'center',
            'left': boxWidth * i + 2,
            'width': boxWidth,
            'height': boxHeight,
            'tags': true,
            'border': {
                'type': 'line',
            },
            'style': {
                'fg': 'white',
                'bg': 'black',
                'border': { 'fg': 'magenta' },
            },
        });
        boxes.push (box);
        screen.append (box);
    }
    screen.key ([ 'escape', 'q', 'C-c' ], () => {
        process.exit (0);
    });

    process.on ('SIGINT', () => {
        screen.destroy (); // cleanup blessed screen
        spinner.clear ();
        process.exit (0);
    });
    // screen.render ();
    const renderPromises = [];
    for (let i = 0; i < exchanges.length; i++) {
        renderPromises.push (renderOrderBook (screen, exchanges[i], symbol, boxes[i], exchanges[i].id, depth));
    }
    await Promise.all (renderPromises);
}

function center (str, width) {
    const len = str.length;