/**
 * Filters bucket data
 *
 *  Copyright (C) 2017 R-T Specialty, LLC.
 *
 *  This file is part of the Liza Data Collection Framework.
 *
 *  liza is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

var filters = {
    name:       /[^a-zA-Z \'\.-]/g,
    address:    /[^a-zA-Z0-9 &\/\'\.,-]/g,
    city:       /[^a-zA-Z \'\.-]/g,
    currency:   /[^\-0-9\.]/g,
    'float':    /[^0-9\.]/g,
    'date':     /[^0-9\/\.-]/g,
    dba:        /[^a-zA-Z0-9 \'\.,&\(\):\/-]/g,
    dollars:    /[^\-0-9\.]/g,
    email:      /[^a-zA-Z0-9_\.@-]/g,
    number:     /[^0-9\.]/g,
    cvv2:       /[^0-9]/g,
    quoteId:    /[^0-9]/g,
    personalId: /[^0-9]/g,
    phone:      /[^0-9 \(\)\.-]/g,
    url:        /[^a-zA-Z0-9:\/_\.\+\$\(\)\\\?&@=\';#~-]/,
    year:       /[^0-9]/g,
    zip:        /[^0-9a-zA-Z-]|[DFIOQU]/g,
    radio:      /[^0-9a-zA-Z_\/-]/g,
    legacyradio:/[^0-9a-zA-Z_\/-]/g,
    submit:     /[^0-9a-zA-Z _-]/g,
    select:     /[^0-9a-zA-Z &\+|\.\/,\(\)'"_-]/g,

    'default': new RegExp( '//' ),
};


/**
 * Filters bucket data based on the provided types
 *
 * If a type is not provided, the data is considered to be unwanted and is
 * removed entirely. Otherwise, the filter is applied to every element in the
 * array.
 *
 * The data is modified in place.
 *
 * @param Object data      data to filter
 * @param Object key_types filter types
 *
 * @return Object modified data
 */
exports.filter = function( data, key_types, ignore_types, permit_null )
{
    permit_null = ( permit_null === undefined ) ? false : !!permit_null;

    // loop through each of the bucket values
    for ( key in data )
    {
        // BC between string and object representation of type data
        var type_data = key_types[ key ],
            type      = ( type_data )
                ? type_data.type || type_data
                : undefined;

        var dim = ( type_data )
            ? type_data.dim
            : 1;

        var values = data[ key ];

        // if it's not an expected bucket value, get rid of it (this prevents
        // users from using us as their own personal database
        if ( ( type === undefined ) || ( ignore_types[ key ] === true ) )
        {
            delete data[ key ];
            continue;
        }

        // attempt to get the filter, or use the default filter if one was not
        // found
        var filter = filters[ type ] || filters['default'];

        if ( values === undefined || values === null )
        {
            values = [];
        }

        // XXX: this does not handle multi-dimensional data, since we should
        // _remove_ this file entirely
        data[ key ] = ( dim === 1 )
            ? filterValues( values, filter, permit_null )
            : values;
    }

    return data;
};


function filterValues( values, filter, permit_null )
{
    var len = values.length;

    for ( var i = 0; i < len; i++ )
    {
        if ( typeof values[ i ] !== 'string' )
        {
            if ( permit_null && ( values[ i ] === null ) )
            {
                continue;
            }

            values[ i ] = ''+( values[ i ] );
        }

        values[ i ] = values[ i ].replace( filter, '' );
    }

    return values;
}