/*****************************************************************************************
 * X2Engine Open Source Edition is a customer relationship management program developed by
 * X2Engine, Inc. Copyright (C) 2011-2014 X2Engine Inc.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by the
 * Free Software Foundation with the addition of the following permission added
 * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
 * IN WHICH THE COPYRIGHT IS OWNED BY X2ENGINE, X2ENGINE DISCLAIMS THE WARRANTY
 * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with
 * this program; if not, see http://www.gnu.org/licenses or write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 * 
 * You can contact X2Engine, Inc. P.O. Box 66752, Scotts Valley,
 * California 95067, USA. or at email address contact@x2engine.com.
 * 
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 * 
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * X2Engine" logo. If the display of the logo is not reasonably feasible for
 * technical reasons, the Appropriate Legal Notices must display the words
 * "Powered by X2Engine".
 *****************************************************************************************/

if (typeof x2 === 'undefined') x2 = {};

x2.fileUtil = (function () {

function FileUtil (argsDict) {
    argsDict = typeof argsDict === 'undefined' ? {} : argsDict;
    var defaultArgs = {
    };
    auxlib.applyArgs (this, defaultArgs, argsDict);
}

/*
Public static methods
*/

/*
Private static methods
*/

/*
Public instance methods
*/

/*
Private instance methods
*/

/**
 * @param array extensions Array of valid file extensions
 */
FileUtil.prototype.checkFileType = function (fileName, extensions) {
    var re = new RegExp ('\\.' + extensions.join ('|') + '$');
    return fileName.match (re);
};

/**
 * Validate file input, display errors, enable/disable form submission
 * @param object fileElem jQuery object corresponding to file input element
 * @param array extensions 
 * @param object submitButton jQuery object corresponding to form submit button
 */
FileUtil.prototype.validateFile = function (fileElem, extensions, submitButton) {
    if (this.checkFileType ($(fileElem).val (), extensions)) {
        $(fileElem).removeClass ('error');
        $(fileElem).next ('.x2-file-error').remove ();
        $(submitButton).removeAttr ('disabled');
        return true;
    } else {
        $(fileElem).addClass ('error');
        $(fileElem).next ('.x2-file-error').remove ();
        $(fileElem).after ($('<div>', {
            'class': 'x2-file-error',
            'text': ($(fileElem).val () === '' ? 'Select a file' : 'Invalid file type')
        }));
        $(submitButton).attr ('disabled', 'disabled');
        return false;
    }
};

return new FileUtil;

}) ();
