Dynmap player notifier

index.js

// Dynmap player notifier
// Execute the javascript in the console of running dynmap website and let yourself be notified
// when someone enters/leaves your base so you would know when they may be stealing your stuff
// Copyright (C) Ján Gajdoš 2023

// change these
const discordWebhook = ""; // discord webhook url
const pos = [StartX, StartZ, EndX, EndZ]; // positions of your base
const ignore = []; // player names to ignore
const alarmMode = false; // if set to true, the webhook won't stop notifing
// After you are done with configuring, paste the code into console and to run, type `monitor()` and hit enter

globalThis.monitor = () => {
    const namesInside = [];

    function sendMessage(msg) {
        const request = new XMLHttpRequest();
        request.open("POST", discordWebhook);
        request.setRequestHeader('Content-type', 'application/json');

        const params = {
            username: "Dynmap",
            avatar_url: "",
            content: msg
        }

        request.send(JSON.stringify(params));
    }

    function checkInBox(x, y, startX, startY, endX, endY, callback, name) {
        const left = Math.min(startX, endX);
        const right = Math.max(startX, endX);
        const top = Math.min(startY, endY);
        const bottom = Math.max(startY, endY);
        if (x >= left && x <= right && y >= top && y <= bottom) {
            if ((!namesInside.includes(name) || alarmMode) && !ignore.includes(name)) {
                callback(`Player ${name} has entered safe area!`);

                if (!namesInside.includes(name)) namesInside.push(name);
            }
        } else {
            if (namesInside.includes(name)) {
                namesInside.splice(namesInside.indexOf(name), 1);
                callback(`Player ${name} has left the safe area!`);
            }
        }
    }

    (function (open) {
        XMLHttpRequest.prototype.open = function (method, url, async, user, pass) {
            this.addEventListener("load", e => {
                try {
                    const json = JSON.parse(e.target.responseText);
                    const hraci = json.players;
                    hraci.forEach(h => checkInBox(h.x, h.z, pos[0], pos[1], pos[2], pos[3], sendMessage, h.name));
                } catch (e) { }
            });
            open.call(this, method, url, async, user, pass);
        };
    })(XMLHttpRequest.prototype.open);
}