function httpGetAsync(url, data, callback) {
    const xmlHttp = new XMLHttpRequest();
    xmlHttp.onreadystatechange = function () {
        if (this.readyState === 4) {
            if (this.status !== 401) {
                clearTimeout(timeout);
                timeout = startTimeout();
            }
            callback(xmlHttp.responseText, xmlHttp.status);
        }
    }

    xmlHttp.open("GET", url, true);
    xmlHttp.setRequestHeader('Authorization', 'Basic ' + sessionStorage.getItem('authorization'));
    xmlHttp.send(null);
}

function httpPostAsync(url, data, callback) {
    const xmlHttp = new XMLHttpRequest();
    xmlHttp.onreadystatechange = function () {
        if (this.readyState === 4) {
            callback(xmlHttp.responseText, xmlHttp.status);
        }
    }

    xmlHttp.open("POST", url, true);
    xmlHttp.setRequestHeader('Authorization', 'Basic ' + sessionStorage.getItem('authorization'));
    xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlHttp.send(data);
}

function httpUploadAsync(url, data, callback) {
    const xmlHttp = new XMLHttpRequest();
    xmlHttp.onreadystatechange = function () {
        if (this.readyState === 4) {
            callback(xmlHttp.responseText, xmlHttp.status);
        }
    }

    xmlHttp.upload.addEventListener("progress",function(event){
        let progressBar = document.getElementById("upload_progress");
        let progress = (event.loaded/event.total)*100;
        progressBar.value = progress;
        console.log(progress)
    });

    xmlHttp.open("POST", url, true);
    xmlHttp.setRequestHeader('Authorization', 'Basic ' + sessionStorage.getItem('authorization'));
    xmlHttp.send(data);
}

function httpDeleteAsync(url, data, callback) {
    const xmlHttp = new XMLHttpRequest();
    xmlHttp.onreadystatechange = function () {
        if (this.readyState === 4) {
            callback(xmlHttp.responseText, xmlHttp.status);
        }
    }

    xmlHttp.open("DELETE", url, true);
    xmlHttp.setRequestHeader('Authorization', 'Basic ' + sessionStorage.getItem('authorization'));
    xmlHttp.send();
}

function startTimeout() {
    return setTimeout(function () {
        sessionStorage.removeItem('authorization');
        document.getElementById('logout').remove();
        document.getElementById('context_menu').parentElement.remove();
        create_login_view();
    }, 600000);
}

function findGetParameter(parameterName) {
    let result = null,
        tmp = [];
    location.search
        .substr(1)
        .split("&")
        .forEach(function (item) {
            tmp = item.split("=");
            if (tmp[0] === parameterName) result = decodeURIComponent(tmp[1]);
        });
    return result;
}

function get_random_id() {
    let s4 = function () {
        return Math.floor((1 + Math.random()) * 0x10000)
            .toString(16)
            .substring(1);
    }

    return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
}

function try_to_parse_error(message) {
    try {
        message = JSON.parse(message);
        create_error_view(message['error'] + ` <span onclick="this.parentElement.children[1].click(); window.history.pushState('index', 'Filemanager', 'index.html?path='); path_changed();">Return to root directory</span>`);
    } catch (e) {
        create_error_view(`Unrecoverable error! <span onclick="this.parentElement.children[1].click(); window.history.pushState('index', 'Filemanager', 'index.html?path='); path_changed();">Return to root directory</span>`);
    }
}