TPBot.js

// ==UserScript==
// @name          TagPro State Bot
// @version       0.1
// @include       http://tagpro-maptest.koalabeast.com:*
// @include       http://tangent.jukejuice.com:*
// @include       http://*.newcompte.fr:*
// @author        Cap
// ==/UserScript==

tagpro.ready(function() {
    waitForStart(run);
});

function waitForStart(fn) {
    if (tagpro.state !== 1 || !tagpro.playerId) {
        setTimeout(function() {
            waitForStart(fn);
        }, 100);
    } else {
        fn();
    }
}


function run() {
    let id = Object.keys(tagpro.players).filter(p => p !== tagpro.playerId)[0];  // id of other player
    move(id);
}

function move(id) {
    let x = tagpro.players[tagpro.playerId].x;
    let y = tagpro.players[tagpro.playerId].y;
    var dest = {
        x: tagpro.players[id].x,
        y: tagpro.players[id].y
    }
    if (dest.x > x) {
        tagpro.sendKeyPress("left", true);
        tagpro.sendKeyPress("right", false);
    } else if (dest.x < x) {
        tagpro.sendKeyPress("right", true);
        tagpro.sendKeyPress("left", false);
    } else {
        tagpro.sendKeyPress("right", true);
        tagpro.sendKeyPress("left", true);
    }
    
    if (dest.y > y) {
        tagpro.sendKeyPress("up", true);
        tagpro.sendKeyPress("down", false);
    } else if (dest.y < y) {
        tagpro.sendKeyPress("down", true);
        tagpro.sendKeyPress("up", false);
    } else {
        tagpro.sendKeyPress("up", true);
        tagpro.sendKeyPress("down", true);
    }
    setTimeout(function() {
        move(id);
    }, 100);
}