function translate (expr)
{
    var lang_array = {
    "Jirafeau, your web file repository": "transfer.agrobex.pl",
    "Select a file": "Wybierz plik",
    "Send": "Wyślij",
    "Uploading ...": "Wgrywanie",
    "One time download": "Jednorazowego pobrania* (opcjonalne)",
    "Password": "Hasło (opcjonalne)",
    "Time limit": "Usuń plik po",
    "Maximum file size": "Maksymaln wielkość pliku",
    "powered by Open-Source project Jirafeau": "",
    "Jirafeau Project": "",
    "One minute": "minucie",
    "One hour": "godzinie",
    "One day": "jednym dniu",
    "One week": "tygodniu",
    "One month": "miesiącu",
    "One year": "roku",
    "None": "wcale",
    "Upload password": "Hasło",
    "File is too big": "Plik jest za duzy",
    "File size is limited to": "Wielkość pliku jest ograniczona do ",
    "The file directory is not writable": "The file directory is not writable",
    "The link directory is not writable": "The link directory is not writable",
    "The async directory is not writable!": "The async directory is not writable!",
    "Installer script still present": "Installer script still present",
    "Please make sure to delete the installer script \"install.php\" before continuing.": "Please make sure to delete the installer script \"install.php\" before continuing.",
    "An error occurred.": "Wystapił błąd.",
    "File uploaded !": "Plik zapisany!",
    "Download page": "Odnośnik do pobrania pliku:",
    "This file is valid until the following date": "Plik zostanie trwale usunięty po",
    "View link": "Odnośnik do pobrania",
    "Direct download link": "Bezpośreni odnośnik do pobrania",
    "Delete link": "Odnośnik do usunięcia pliku",
    "Download": "Pobierz",
    "Preview": "Podgląd",
    "Sorry, the requested file is not found": "Nie znaleziono pliku",
    "File not available.": "Plik nie jest dostępny",
    "File has been deleted.": "Plik został usunięty",
    "The time limit of this file has expired.": "Data wygasania pliku została przekroczona. Plik nie jest dostępny.",
    "Password protection": "Chroniony hasłem",
    "Give the password of this file": "Podaj hasło do pliku",
    "Access denied": "Dostęp zabroniony",
    "You are about to download": "Pobierasz",
    "By using our services, you accept our": "",
    "Term Of Service": "",
    "Warning, this file will self-destruct after being read": "Uwaga, ten plik zostanie trwale usunięty po pobraniu",
    "Internal error during file creation.": "",

    "This file was generated by the install process. You can edit it. Please see config.original.php to understand the configuration items.": "",
    "The following directory could not be created": "",
    "You should create this directory manually.": "",
    "The following directory is not writable": "",
    "You should give the write permission to the web server on this directory.": "",
    "Here is a solution": "",
    "The local configuration file could not be created. Create a <code>lib/config.local.php</code> file and give the write permission to the web server (preferred solution), or give the write permission to the web server on the <code>lib</code> directory.": "",
    "The local configuration is not writable by the web server. Give the write permission to the web server on the '<code>lib/config.local.php</code> file.": "",
    "Installation of Jirafeau": "",
    "step": "",
    "out of": "",
    "Administration password": "",
    "Finalisation": "",
    "Jirafeau is setting the website according to the configuration you provided.": "",
    "Previous step": "",
    "Retry this step": "",
    "Jirafeau is now fully operational": "",
    "Information": "",
    "The base address of Jirafeau is the first part of the URL, until (and including) the last slash. For example: \"http://www.example.com/\". Do not forget the trailing slash!": "",
    "Base address": "",
    "The data directory is where your files and information about your files will be stored. You should put it outside your web site, or at least restrict the access to this directory. Do not forget the trailing slash!": "",
    "Data directory": "",
    "Jirafeau is internationalised. Choose a specific langage or choose Automatic (langage is provided by user's browser).": "",
    "Choose the default language": "",
    "Next step": "",
    "Jirafeau has an administration interface (through admin.php). You can set a password to access the interface or leave it empty to disable the interface.": "",
    "Administration password": "Administration password",

    "Sorry, the admin interface is not enabled.": "Sorry, the admin interface is not enabled.",
    "Sorry, you are not authenticated on admin interface.": "Sorry, you are not authenticated on admin interface.",
    "Login": "Login",
    "Wrong password.": "Wrong password.",
    "Admin interface": "Admin interface",
    "Clean expired files": "Clean expired files",
    "Clean old unfinished transfers": "Clean old unfinished transfers",
    "Clean": "Clean",
    "Search files by name": "Search files by name",
    "Search": "Search",
    "List all files": "List all files",
    "List": "List",
    "Actions": "Actions",
    "Search files by file hash": "Search files by file hash",
    "Search a specific link": "Search a specific link",
    "Number of cleaned files": "Number of cleaned files",
    "Logout": "Logout",
    "You are now loggued out": "You are now loggued out",
    "Link deleted": "Link deleted",
    "Filename": "Filename",
    "file": "file",
    "link": "link",
    "Type": "Type",
    "Size": "Size",
    "Expire": "Expire",
    "Onetime": "Onetime",
    "Upload date": "Upload date",
    "Origin": "Origin",
    "Action": "Action",
    "Del link": "Del link",
    "Del file and links": "Del file and links",
    "Deleted links": "Deleted links",
    "year": "year",
    "day": "day",
    "minute": "minute",
    "hour": "hour",
    "second": "second",
    "less than a second": "less than a second"
}
;
    if (lang_array.hasOwnProperty(expr))
        return lang_array[expr];
    return expr;
}

function show_link (url, reference, delete_code, crypt_key, date)
{
    // Upload finished
    document.getElementById('uploading').style.display = 'none';
    document.getElementById('upload').style.display = 'none';
    document.getElementById('upload_finished').style.display = '';
    document.title = 'transfer.Agrobex.pl - 100%';

    // Download page
    var download_link = url + 'f.php?h=' + reference;
    var download_link_href = url + 'f.php?h=' + reference;
    if (crypt_key.length > 0)
    {
        download_link += '&amp;k=' + crypt_key;
        download_link_href += '&k=' + crypt_key;
    }
    if (!!document.getElementById('upload_finished_download_page'))
    {
        document.getElementById('upload_link').innerHTML = download_link;
        document.getElementById('upload_link').href = download_link_href;
    }

    // Email link
    var filename = document.getElementById('file_select').files[0].name;
    var b = encodeURIComponent("Download file \"" + filename + "\":") + "%0D";
    b += encodeURIComponent(download_link_href) + "%0D";
    if (date)
        b += "%0D" + encodeURIComponent("This file will be available until " + date) + "%0D";
    document.getElementById('upload_link_email').href = "mailto:?body=" + b + "&subject=" + encodeURIComponent(filename);

    // Delete link
    var delete_link = url + 'f.php?h=' + reference + '&amp;d=' + delete_code;
    var delete_link_href = url + 'f.php?h=' + reference + '&d=' + delete_code;
    document.getElementById('delete_link').innerHTML = delete_link;
    document.getElementById('delete_link').href = delete_link_href;

    // Validity date
    if (date)
    {
        document.getElementById('date').innerHTML = date;
        document.getElementById('validity').style.display = '';
    }
    else
        document.getElementById('validity').style.display = 'none';

    // Preview link (if allowed)
    if (!!document.getElementById('preview_link'))
    {
        document.getElementById('upload_finished_preview').style.display = 'none';
        var preview_link = url + 'f.php?h=' + reference + '&amp;p=1';
        var preview_link_href = url + 'f.php?h=' + reference + '&p=1';
        if (crypt_key.length > 0)
        {
            preview_link += '&amp;k=' + crypt_key;
            preview_link_href += '&k=' + crypt_key;
        }

        // Test if content can be previewed
         type = document.getElementById('file_select').files[0].type;
         if (type.indexOf("image") > -1 ||
             type.indexOf("audio") > -1 ||
             type.indexOf("text") > -1 ||
             type.indexOf("video") > -1)
         {
            document.getElementById('preview_link').innerHTML = preview_link;
            document.getElementById('preview_link').href = preview_link_href;
            document.getElementById('upload_finished_preview').style.display = '';
         }
    }

    // Direct download link
    var direct_download_link = url + 'f.php?h=' + reference + '&amp;d=1';
    var direct_download_link_href = url + 'f.php?h=' + reference + '&d=1';
    if (crypt_key.length > 0)
    {
        direct_download_link += '&amp;k=' + crypt_key;
        direct_download_link_href += '&k=' + crypt_key;
    }
    document.getElementById('direct_link').innerHTML = direct_download_link;
    document.getElementById('direct_link').href = direct_download_link_href;


    // Hide preview and direct download link if password is set
    if (document.getElementById('input_key').value.length > 0)
    {
        if (!!document.getElementById('preview_link'))
            document.getElementById('upload_finished_preview').style.display = 'none';
        document.getElementById('upload_direct_download').style.display = 'none';
    }
}

function show_upload_progression (percentage, speed, time_left)
{
    document.getElementById('uploaded_percentage').innerHTML = percentage;
    document.getElementById('uploaded_speed').innerHTML = speed;
    document.getElementById('uploaded_time').innerHTML = time_left;
    document.title = 'transfer.Agrobex.pl - ' + percentage;
}

function hide_upload_progression ()
{
    document.getElementById('uploaded_percentage').style.display = 'none';
    document.getElementById('uploaded_speed').style.display = 'none';
    document.getElementById('uploaded_time').style.display = 'none';
    document.title = 'transfer.Agrobex.pl';
}

function upload_progress (e)
{
    if (e == undefined || e == null || !e.lengthComputable)
        return;

    // Init time estimation if needed
    if (upload_time_estimation_total_size == 0)
        upload_time_estimation_total_size = e.total;

    // Compute percentage
    var p = Math.round (e.loaded * 100 / e.total);
    var p_str = ' ';
    if (p != 100)
        p_str = p.toString() + '%';
    // Update estimation speed
    upload_time_estimation_add(e.loaded);
    // Get speed string
    var speed_str = upload_time_estimation_speed_string();
    speed_str = upload_speed_refresh_limiter(speed_str);
    // Get time string
    var time_str = chrono_update(upload_time_estimation_time());

    show_upload_progression (p_str, speed_str, time_str);
}

function control_selected_file_size(max_size, error_str)
{
    f_size = document.getElementById('file_select').files[0].size;
    if (max_size > 0 && f_size > max_size * 1024 * 1024)
    {
        pop_failure(error_str);
        document.getElementById('send').style.display = 'none';
    }
    else
    {
        document.getElementById('options').style.display = '';
        document.getElementById('send').style.display = '';
        document.getElementById('error_pop').style.display = 'none';
        document.getElementById('file_select').style.left = 'inherit';
        document.getElementById('file_select').style.height = 'inherit';
        document.getElementById('file_select').style.opacity = '1';
    }
}

function pop_failure (e)
{
    var text = "An error occured";
    if (typeof e !== 'undefined')
        text = e;
    text = "<p>" + text + "</p>";
    document.getElementById('error_pop').innerHTML = e;

    document.getElementById('uploading').style.display = 'none';
    document.getElementById('error_pop').style.display = '';
    document.getElementById('upload').style.display = '';
    document.getElementById('send').style.display = '';
}

function add_time_string_to_date(d, time)
{
    if(typeof(d) != 'object' || !(d instanceof Date))
    {
        return false;
    }
    
    if (time == 'minute')
    {
        d.setSeconds (d.getSeconds() + 60);
        return true;
    }
    if (time == 'hour')
    {
        d.setSeconds (d.getSeconds() + 3600);
        return true;
    }
    if (time == 'day')
    {
        d.setSeconds (d.getSeconds() + 86400);
        return true;
    }
    if (time == 'week')
    {
        d.setSeconds (d.getSeconds() + 604800);
        return true;
    }
    if (time == 'month')
    {
        d.setSeconds (d.getSeconds() + 2419200);
        return true;
    }
    if (time == 'year')
    {
        d.setSeconds (d.getSeconds() + 29030400);
        return true;
    }
    return false;
}

function classic_upload (url, file, time, password, one_time, upload_password)
{
    // Delay time estimation init as we can't have file size
    upload_time_estimation_init(0);

    var req = new XMLHttpRequest ();
    req.upload.addEventListener ("progress", upload_progress, false);
    req.addEventListener ("error", pop_failure, false);
    req.addEventListener ("abort", pop_failure, false);
    req.onreadystatechange = function ()
    {
        if (req.readyState == 4 && req.status == 200)
        {
            var res = req.responseText;
            if (res == "Error")
            {
                pop_failure ();
                return;
            }
            res = res.split ("\n");
            if (time != 'none')
            {
                var d = new Date();
                if(!add_time_string_to_date(d, time))
                    return;
                show_link (url, res[0], res[1], res[2], d.toString());
            }
            else
                show_link (url, res[0], res[1], res[2]);
        }
    }
    req.open ("POST", url + 'script.php' , true);

    var form = new FormData();
    form.append ("file", file);
    if (time)
        form.append ("time", time);
    if (password)
        form.append ("key", password);
    if (one_time)
        form.append ("one_time_download", '1');
    if (upload_password.length > 0)
        form.append ("upload_password", upload_password);

    req.send (form);
}

function check_html5_file_api ()
{
    return window.File && window.FileReader && window.FileList && window.Blob;
}

var async_global_transfered = 0;
var async_global_url = '';
var async_global_file;
var async_global_ref = '';
var async_global_max_size = 0;
var async_global_time;
var async_global_transfering = 0;

function async_upload_start (url, max_size, file, time, password, one_time, upload_password)
{
    async_global_transfered = 0;
    async_global_url = url;
    async_global_file = file;
    async_global_max_size = max_size;
    async_global_time = time;

    var req = new XMLHttpRequest ();
    req.addEventListener ("error", pop_failure, false);
    req.addEventListener ("abort", pop_failure, false);
    req.onreadystatechange = function ()
    {
        if (req.readyState == 4 && req.status == 200)
        {
            var res = req.responseText;
            if (res == "Error")
            {
                pop_failure ();
                return;
            }
            res = res.split ("\n");
            async_global_ref = res[0];
            var code = res[1];
            async_upload_push (code);
        }
    }
    req.open ("POST", async_global_url + 'script.php?init_async' , true);

    var form = new FormData();
    form.append ("filename", async_global_file.name);
    form.append ("type", async_global_file.type);
    if (time)
        form.append ("time", time);
    if (password)
        form.append ("key", password);
    if (one_time)
        form.append ("one_time_download", '1');
    if (upload_password.length > 0)
        form.append ("upload_password", upload_password);

    // Start time estimation
    upload_time_estimation_init(async_global_file.size);

    req.send (form);
}

function async_upload_progress (e)
{
    if (e == undefined || e == null || !e.lengthComputable && async_global_file.size != 0)
        return;

    // Compute percentage
    var p = Math.round ((e.loaded + async_global_transfered) * 100 / (async_global_file.size));
    var p_str = ' ';
    if (p != 100)
        p_str = p.toString() + '%';
    // Update estimation speed
    upload_time_estimation_add(e.loaded + async_global_transfered);
    // Get speed string
    var speed_str = upload_time_estimation_speed_string();
    speed_str = upload_speed_refresh_limiter(speed_str);
    // Get time string
    var time_str = chrono_update(upload_time_estimation_time());

    show_upload_progression (p_str, speed_str, time_str);
}

function async_upload_push (code)
{
    if (async_global_transfered == async_global_file.size)
    {
        hide_upload_progression ();
        async_upload_end (code);
        return;
    }
    var req = new XMLHttpRequest ();
    req.upload.addEventListener ("progress", async_upload_progress, false);
    req.addEventListener ("error", pop_failure, false);
    req.addEventListener ("abort", pop_failure, false);
    req.onreadystatechange = function ()
    {
        if (req.readyState == 4 && req.status == 200)
        {
            var res = req.responseText;
            if (res == "Error")
            {
                pop_failure ();
                return;
            }
            res = res.split ("\n");
            var code = res[0]
            async_global_transfered = async_global_transfering;
            async_upload_push (code);
        }
    }
    req.open ("POST", async_global_url + 'script.php?push_async' , true);

    var chunk_size = parseInt (async_global_max_size * 0.50);
    var start = async_global_transfered;
    var end = start + chunk_size;
    if (end >= async_global_file.size)
        end = async_global_file.size;
    var blob = async_global_file.slice (start, end);
    async_global_transfering = end;

    var form = new FormData();
    form.append ("ref", async_global_ref);
    form.append ("data", blob);
    form.append ("code", code);
    req.send (form);
}

function async_upload_end (code)
{
    var req = new XMLHttpRequest ();
    req.addEventListener ("error", pop_failure, false);
    req.addEventListener ("abort", pop_failure, false);
    req.onreadystatechange = function ()
    {
        if (req.readyState == 4 && req.status == 200)
        {
            var res = req.responseText;
            if (res == "Error")
            {
                pop_failure ();
                return;
            }
            res = res.split ("\n");
            if (async_global_time != 'none')
            {
                var d = new Date();
                if(!add_time_string_to_date(d, async_global_time))
                    return;
                show_link (async_global_url, res[0], res[1], res[2], d.toString());
            }
            else
                show_link (async_global_url, res[0], res[1], res[2]);
        }
    }
    req.open ("POST", async_global_url + 'script.php?end_async' , true);

    var form = new FormData();
    form.append ("ref", async_global_ref);
    form.append ("code", code);
    req.send (form);
}

function upload (url, max_size)
{
    if (check_html5_file_api ()
        && document.getElementById('file_select').files[0].size >= max_size)
    {
        async_upload_start (url,
            max_size,
            document.getElementById('file_select').files[0],
            document.getElementById('select_time').value,
            document.getElementById('input_key').value,
            document.getElementById('one_time_download').checked,
            document.getElementById('upload_password').value
            );
    }
    else
    {
        classic_upload (url,
            document.getElementById('file_select').files[0],
            document.getElementById('select_time').value,
            document.getElementById('input_key').value,
            document.getElementById('one_time_download').checked,
            document.getElementById('upload_password').value
            );
    }
}

var upload_time_estimation_total_size = 42;
var upload_time_estimation_transfered_size = 42;
var upload_time_estimation_transfered_date = 42;
var upload_time_estimation_moving_average_speed = 42;

function upload_time_estimation_init(total_size)
{
    upload_time_estimation_total_size = total_size;
    upload_time_estimation_transfered_size = 0;
    upload_time_estimation_moving_average_speed = 0;
    var d = new Date();
    upload_time_estimation_transfered_date = d.getTime();
}

function upload_time_estimation_add(total_transfered_size)
{
    // Let's compute the current speed
    var d = new Date();
    var speed = upload_time_estimation_moving_average_speed;
    if (d.getTime() - upload_time_estimation_transfered_date != 0)
        speed = (total_transfered_size - upload_time_estimation_transfered_size)
                / (d.getTime() - upload_time_estimation_transfered_date);
    // Let's compute moving average speed on 30 values
    var m = (upload_time_estimation_moving_average_speed * 29 + speed) / 30;
    // Update global values
    upload_time_estimation_transfered_size = total_transfered_size;
    upload_time_estimation_transfered_date = d.getTime();
    upload_time_estimation_moving_average_speed = m;
}

function upload_time_estimation_speed_string()
{
    // speed ms -> s
    var s = upload_time_estimation_moving_average_speed * 1000;
    var res = 0;
    var scale = '';
    if (s <= 1000)
    {
        res = s.toString();
        scale = "o/s";
    }
    else if (s < 1000000)
    {
        res = Math.floor(s/100) / 10;
        scale = "Ko/s";
    }
    else
    {
        res = Math.floor(s/100000) / 10;
        scale = "Mo/s";
    }
    if (res == 0)
        return '';
    return res.toString() + ' ' + scale;
}

function milliseconds_to_time_string (milliseconds)
{
    function numberEnding (number) {
        return (number > 1) ? 's' : '';
    }

    var temp = Math.floor(milliseconds / 1000);
    var years = Math.floor(temp / 31536000);
    if (years) {
        return years + ' ' + translate ('year') + numberEnding(years);
    }
    var days = Math.floor((temp %= 31536000) / 86400);
    if (days) {
        return days + ' ' + translate ('day') + numberEnding(days);
    }
    var hours = Math.floor((temp %= 86400) / 3600);
    if (hours) {
        return hours + ' ' + translate ('hour') + numberEnding(hours);
    }
    var minutes = Math.floor((temp %= 3600) / 60);
    if (minutes) {
        return minutes + ' ' + translate ('minute') + numberEnding(minutes);
    }
    var seconds = temp % 60;
    if (seconds) {
        return seconds + ' ' + translate ('second') + numberEnding(seconds);
    }
    return translate ('less than a second');
}

function upload_time_estimation_time()
{
    // Estimate remaining time
    if (upload_time_estimation_moving_average_speed == 0)
        return 0;
    return (upload_time_estimation_total_size - upload_time_estimation_transfered_size)
            / upload_time_estimation_moving_average_speed;
}

var chrono_last_update = 0;
var chrono_time_ms = 0;
var chrono_time_ms_last_update = 0;
function chrono_update(time_ms)
{
    var d = new Date();
    var chrono = 0;
    // Don't update too often
    if (d.getTime() - chrono_last_update < 3000 &&
        chrono_time_ms_last_update > 0)
        chrono = chrono_time_ms;
    else
    {
        chrono_last_update = d.getTime();
        chrono_time_ms = time_ms;
        chrono = time_ms;
        chrono_time_ms_last_update = d.getTime();
    }

    // Adjust chrono for smooth estimation
    chrono = chrono - (d.getTime() - chrono_time_ms_last_update);

    // Let's update chronometer
    var time_str = '';
    if (chrono > 0)
        time_str = milliseconds_to_time_string (chrono);
    return time_str;
}

var upload_speed_refresh_limiter_last_update = 0;
var upload_speed_refresh_limiter_last_value = '';
function upload_speed_refresh_limiter(speed_str)
{
    var d = new Date();
    if (d.getTime() - upload_speed_refresh_limiter_last_update > 1500)
    {
        upload_speed_refresh_limiter_last_value = speed_str;
        upload_speed_refresh_limiter_last_update = d.getTime();
    }
    return upload_speed_refresh_limiter_last_value;
}