function htmlEncode(value) {
    //create a in-memory div, set it's inner text(which jQuery automatically encodes)
    //then grab the encoded contents back out.  The div never exists on the page.
    return $('<div/>').text(value).html();
}

function installUploader(uploaderId) {

    $('#fileUploaderButton_' + uploaderId).each(function () {

        $('#fileUploaderButton_' + uploaderId).fileupload({
            dropZone: $(this),
            dataType: 'json',
            done: function (e, data) {
                $.each(data.result.files, function (index, file) {
                    if (!file.error) {
                        hiddenValueField = $('#fileUploaderHiddenField_' + uploaderId);
                        hiddenValueField.val(hiddenValueField.val() + "," + file.guid);
                        addToUploadList(uploaderId, file.guid, file.name, file.mimeIcon);
                    } else {
                        showFileUploadError(file);
                    }
                });
            },
            progressall: function (e, data) {
                var progress = parseInt(data.loaded / data.total * 100, 10);
                $('#fileUploaderProgressbar_' + uploaderId).show();
                if (progress == 100) {
                    $('#fileUploaderProgressbar_' + uploaderId).children().css('width', 100 + "%");
                    $('#fileUploaderProgressbar_' + uploaderId).hide();
                } else {
                    $('#fileUploaderProgressbar_' + uploaderId).children().css('width', progress + "%");
                }
            }
        }).prop('disabled', !$.support.fileInput).parent().addClass($.support.fileInput ? undefined : 'disabled');

    });
}


function addToUploadList(uploaderId, guid, name, icon) {
    $('#fileUploaderList_' + uploaderId).fadeIn('slow');
    $('#fileUploaderListUl_' + uploaderId).append('<li style="padding-left: 24px;" class="mime ' + icon + '">' + name + ' <span data-guid="' + guid + '" class="file_upload_remove_link"> <i class="fa fa-trash-o"></i></span></li>');

    $(".file_upload_remove_link").off("click");
    $(".file_upload_remove_link").on("click", function () {
        $(this).parent().remove();
        $.ajax({
            type: 'POST',
            data: {'guid': $(this).data('guid')},
            url: file_delete_url,
        }).done(function () {
            data: {
                guid: $(this).data('guid')
            }
        });

    });

}


function resetUploader(uploaderId) {
    $('#fileUploaderHiddenField_' + uploaderId).val('');
    $('#fileUploaderList_' + uploaderId).hide();
    $('#fileUploaderListUl_' + uploaderId).html('');
}

/**
 * Show File Upload Error
 *
 * @param {type} file
 * @returns {undefined}
 */
function showFileUploadError(file) {

    // Parse errors array and extract error messages
    errorMessage = "";
    jQuery.each(file.errors, function () {
        jQuery.each(this, function () {
            errorMessage += this;
        });
    });

    $('#fileModal').remove();
    var alertMessage = '<div class="modal" id="fileModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"' +
        'aria-hidden="true">' +
        '<div class="modal-dialog modal-dialog-extra-small animated pulse">' +
        '<div class="modal-content">' +
        '<div class="modal-header">' +
        '<button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>' +
        '<h4 class="modal-title" id="myModalLabel">' + fileuploader_error_modal_title + '</h4> ' +
        '</div>' +
        '<div class="modal-body text-center">' + fileuploader_error_modal_errormsg + ' ' + htmlEncode(file.name) + '<br>' + htmlEncode(errorMessage) + '</div>' +
        '<div class="modal-footer">' +
        '<button type="button" class="btn btn-primary" data-dismiss="modal">' + fileuploader_error_modal_btn_close + '</button>' +
        '</div>' +
        '</div>' +
        '</div>' +
        '</div>'

    $('body').append(alertMessage);
    $('#fileModal').modal('show');

}