<?php
/**
 * phpillow CouchDB backend
 *
 * This file is part of phpillow.
 *
 * phpillow is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; version 3 of the License.
 *
 * phpillow 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 Lesser General Public License for
 * more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with phpillow; if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @package Core
 * @version arbit-0.5-alpha
 * @license http://www.gnu.org/licenses/lgpl-3.0.txt LGPL
 */

/**
 * Validate integer inputs
 *
 * @package Core
 * @version arbit-0.5-alpha
 * @license http://www.gnu.org/licenses/lgpl-3.0.txt LGPL
 */
class phpillowIntegerValidator extends phpillowValidator
{
    /**
     * Minimum value for passed integer value
     * 
     * @var int
     */
    protected $min;

    /**
     * Maximum value for passed integer value
     * 
     * @var int
     */
    protected $max;

    /**
     * Validator constructor
     *
     * Validator constructor to optionally specifiy the minimum and maximum
     * value for the allowed integer values. For no validation you may pass
     * false to the respective parameter.
     * 
     * @param mixed $min 
     * @param mixed $max 
     * @return void
     */
    public function __construct( $min = false, $max = false )
    {
        $this->min = $min;
        $this->max = $max;
    }

    /**
     * Validate input as integer
     * 
     * @param mixed $input 
     * @return int
     */
    public function validate( $input )
    {
        // Check for minimum constraint
        if ( ( $this->min !== false ) &&
             ( $input < $this->min ) )
        {
            throw new phpillowValidationException(
                'Input value %input is not bigger or equal then %minimum.',
                array(
                    'input'   => $input,
                    'minimum' => $this->min,
                )
            );
        }

        // Check for maximum constraint
        if ( ( $this->max !== false ) &&
             ( $input > $this->max ) )
        {
            throw new phpillowValidationException(
                'Input value %input is not lesser or equal then %maximum.',
                array(
                    'input'   => $input,
                    'maximum' => $this->max,
                )
            );
        }

        return (int) $input;
    }
}