Notes

// ==UserScript==
// @name Command Sender
// @namespace http://tampermonkey.net/
// @version 0.1
// @description try to take over the world!
// @author Kichiyaki
// @match *://*.plemiona.pl/game.php?*&screen=place&try=confirm*
// @require https://cdnjs.cloudflare.com/ajax/libs/date-fns/1.30.1/date_fns.min.js
// @grant none
// ==/UserScript==

let timeoutID;
const INPUT_ID = "kichiyaki_command_sender_input";
const START_BUTTON_ID = "kichiyaki_command_sender_start_button";
const CANCEL_BUTTON_ID = "kichiyaki_command_sender_cancel_button";

const getDuration = () => {
return $("#command-data-form")
.find('td:contains("Trwanie:")')
.next()[0]
.innerText.trim()
.split(":")
.map(val => parseInt(val));
};

const calcMinimalTimeToSend = () => {
const duration = getDuration();
return dateFns.format(
dateFns.addHours(
dateFns.addMinutes(
dateFns.addSeconds(
new Date(Timing.getCurrentServerTime()),
duration[2]
),
duration[1] + 5
),
duration[0]
),
"YYYY-MM-DDTHH:mm:ss"
);
};

const calcTimeAttack = date => {
const duration = getDuration();
return dateFns.subHours(
dateFns.subMinutes(dateFns.subSeconds(date, duration[2]), duration[1]),
duration[0]
);
};

const handleStart = () => {
const timeToAttack =
Math.floor(
calcTimeAttack(document.querySelector("#" + INPUT_ID).value).getTime() -
Timing.getCurrentServerTime()
) + 35;

if (timeToAttack <= 0)
return UI.ErrorMessage("Wprowadzono nieprawidłowy czas!");

document.querySelector("#" + START_BUTTON_ID).disabled = true;
document.querySelector("#" + CANCEL_BUTTON_ID).disabled = false;

timeoutID = setTimeout(() => {
document.querySelector("#troop_confirm_go").click();
}, timeToAttack);
};

const handleCancel = () => {
document.querySelector("#" + START_BUTTON_ID).disabled = false;
document.querySelector("#" + CANCEL_BUTTON_ID).disabled = true;
clearTimeout(timeoutID);
};

const renderUI = () => {
const container = document.createElement("div");
const label = document.createElement("label");
label.innerHTML = "Czas dotarcia ataku:";
label.style.marginRight = "15px";
container.appendChild(label);
const input = document.createElement("input");
input.type = "datetime-local";
input.step = ".001";
input.value = calcMinimalTimeToSend();
input.id = INPUT_ID;
container.append(input);

const buttonContainer = document.createElement("div");
container.appendChild(buttonContainer);
const submitButton = document.createElement("button");
submitButton.innerHTML = "OK";
submitButton.addEventListener("click", handleStart);
submitButton.id = START_BUTTON_ID;
submitButton.type = "button";
buttonContainer.appendChild(submitButton);
const cancelButton = document.createElement("button");
cancelButton.innerHTML = "Anuluj";
cancelButton.disabled = true;
cancelButton.id = CANCEL_BUTTON_ID;
cancelButton.type = "button";
cancelButton.addEventListener("click", handleCancel);
buttonContainer.appendChild(cancelButton);

document.querySelector(".vis").appendChild(container);
};

(function() {
renderUI();
})();