Function OpenApp

nui/scripts/script.js:696–757

(appName, msgBox)

 * @returns {0 | 1 | 2} 0 -> app doesn't exist, 1 -> app opened, 2 -> app was already opened
 */
const OpenApp = (appName, msgBox) => {
    openedApps.push(appName);

    let elem = document.getElementById("app-"+appName);
    if (!elem) {
        if (Applications[appName] && !Applications[appName].usable) {
            MessageBox("error", GetLocale("os_error"), GetLocale("os_fake_error").replace("{1}", appName));
            return 1;
        }

        return 0;
    }
    elem.style.display = "flex";
    elem.style.visibility = "visible";

    let wasOpen = true;
    let taskbarIcon = document.getElementById("taskbar-"+appName);

    if (!taskbarIcon) {
        wasOpen = false;
        let taskbar = document.getElementById("left");
        taskbarIcon = document.createElement("button");
        taskbarIcon.id = "taskbar-"+appName;
        taskbarIcon.classList.add("taskbar-icon");
        taskbarIcon.innerHTML = `<img src="assets/images/${msgBox ? appName.split("_")[1] : appName}.png">`;
        taskbarIcon.onclick = () => {
            if (elem.style.visibility === "hidden" || elem.style.zIndex < 9999999) {
                FocusApp(false, appName);
                elem.style.visibility = "visible";
    
                if (appName == "console") {
                    let consoleInput = document.getElementById("console-input");
                    if (consoleInput) consoleInput.focus();
                }
            }
            else {
                MinimizeApp(appName);
            }
        }
        taskbar.appendChild(taskbarIcon);
    }

    elem.onmousedown = (e) => FocusApp(e, appName);
    document.body.onmousedown = () => UnfocusAllApp();
    FocusApp(false, appName);

    if (!wasOpen) {
        if (appName === "console") 
            ClearConsole();
        else if (appName === "mail") {
            mailCreation = false;
            document.getElementById("mail-create").innerText = GetLocale("mail_create");
            document.getElementById("mail-signout").style.display = "initial";
            document.getElementById("mail-refresh").style.display = "initial";
            document.getElementById("mail-creator").style.display = "none";
            document.getElementById("mail-reader").style.display = "none";
            document.getElementById("mail-container").style.display = "flex";
        }