<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category  Zend
 * @package   Zend_Measure
 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 * @version   $Id: Power.php 20096 2010-01-06 02:05:09Z bkarwin $
 */

/**
 * Implement needed classes
 */
require_once 'Zend/Measure/Abstract.php';
require_once 'Zend/Locale.php';

/**
 * Class for handling power conversions
 *
 * @category   Zend
 * @package    Zend_Measure
 * @subpackage Zend_Measure_Power
 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Measure_Power extends Zend_Measure_Abstract
{
    const STANDARD = 'WATT';

    const ATTOWATT                               = 'ATTOWATT';
    const BTU_PER_HOUR                           = 'BTU_PER_HOUR';
    const BTU_PER_MINUTE                         = 'BTU_PER_MINUTE';
    const BTU_PER_SECOND                         = 'BTU_PER_SECOND';
    const CALORIE_PER_HOUR                       = 'CALORIE_PER_HOUR';
    const CALORIE_PER_MINUTE                     = 'CALORIE_PER_MINUTE';
    const CALORIE_PER_SECOND                     = 'CALORIE_PER_SECOND';
    const CENTIWATT                              = 'CENTIWATT';
    const CHEVAL_VAPEUR                          = 'CHEVAL_VAPEUR';
    const CLUSEC                                 = 'CLUSEC';
    const DECIWATT                               = 'DECIWATT';
    const DEKAWATT                               = 'DEKAWATT';
    const DYNE_CENTIMETER_PER_HOUR               = 'DYNE_CENTIMETER_PER_HOUR';
    const DYNE_CENTIMETER_PER_MINUTE             = 'DYNE_CENTIMETER_PER_MINUTE';
    const DYNE_CENTIMETER_PER_SECOND             = 'DYNE_CENTIMETER_PER_SECOND';
    const ERG_PER_HOUR                           = 'ERG_PER_HOUR';
    const ERG_PER_MINUTE                         = 'ERG_PER_MINUTE';
    const ERG_PER_SECOND                         = 'ERG_PER_SECOND';
    const EXAWATT                                = 'EXAWATT';
    const FEMTOWATT                              = 'FEMTOWATT';
    const FOOT_POUND_FORCE_PER_HOUR              = 'FOOT_POUND_FORCE_PER_HOUR';
    const FOOT_POUND_FORCE_PER_MINUTE            = 'FOOT_POUND_FORCE_PER_MINUTE';
    const FOOT_POUND_FORCE_PER_SECOND            = 'FOOT_POUND_FORCE_PER_SECOND';
    const FOOT_POUNDAL_PER_HOUR                  = 'FOOT_POUNDAL_PER_HOUR';
    const FOOT_POUNDAL_PER_MINUTE                = 'FOOT_POUNDAL_PER_MINUTE';
    const FOOT_POUNDAL_PER_SECOND                = 'FOOT_POUNDAL_PER_SECOND';
    const GIGAWATT                               = 'GIGAWATT';
    const GRAM_FORCE_CENTIMETER_PER_HOUR         = 'GRAM_FORCE_CENTIMETER_PER_HOUR';
    const GRAM_FORCE_CENTIMETER_PER_MINUTE       = 'GRAM_FORCE_CENTIMETER_PER_MINUTE';
    const GRAM_FORCE_CENTIMETER_PER_SECOND       = 'GRAM_FORCE_CENTIMETER_PER_SECOND';
    const HECTOWATT                              = 'HECTOWATT';
    const HORSEPOWER_INTERNATIONAL               = 'HORSEPOWER_INTERNATIONAL';
    const HORSEPOWER_ELECTRIC                    = 'HORSEPOWER_ELECTRIC';
    const HORSEPOWER                             = 'HORSEPOWER';
    const HORSEPOWER_WATER                       = 'HORSEPOWER_WATER';
    const INCH_OUNCE_FORCE_REVOLUTION_PER_MINUTE = 'INCH_OUNCH_FORCE_REVOLUTION_PER_MINUTE';
    const JOULE_PER_HOUR                         = 'JOULE_PER_HOUR';
    const JOULE_PER_MINUTE                       = 'JOULE_PER_MINUTE';
    const JOULE_PER_SECOND                       = 'JOULE_PER_SECOND';
    const KILOCALORIE_PER_HOUR                   = 'KILOCALORIE_PER_HOUR';
    const KILOCALORIE_PER_MINUTE                 = 'KILOCALORIE_PER_MINUTE';
    const KILOCALORIE_PER_SECOND                 = 'KILOCALORIE_PER_SECOND';
    const KILOGRAM_FORCE_METER_PER_HOUR          = 'KILOGRAM_FORCE_METER_PER_HOUR';
    const KILOGRAM_FORCE_METER_PER_MINUTE        = 'KILOGRAM_FORCE_METER_PER_MINUTE';
    const KILOGRAM_FORCE_METER_PER_SECOND        = 'KILOGRAM_FORCE_METER_PER_SECOND';
    const KILOPOND_METER_PER_HOUR                = 'KILOPOND_METER_PER_HOUR';
    const KILOPOND_METER_PER_MINUTE              = 'KILOPOND_METER_PER_MINUTE';
    const KILOPOND_METER_PER_SECOND              = 'KILOPOND_METER_PER_SECOND';
    const KILOWATT                               = 'KILOWATT';
    const MEGAWATT                               = 'MEGAWATT';
    const MICROWATT                              = 'MICROWATT';
    const MILLION_BTU_PER_HOUR                   = 'MILLION_BTU_PER_HOUR';
    const MILLIWATT                              = 'MILLIWATT';
    const NANOWATT                               = 'NANOWATT';
    const NEWTON_METER_PER_HOUR                  = 'NEWTON_METER_PER_HOUR';
    const NEWTON_METER_PER_MINUTE                = 'NEWTON_METER_PER_MINUTE';
    const NEWTON_METER_PER_SECOND                = 'NEWTON_METER_PER_SECOND';
    const PETAWATT                               = 'PETAWATT';
    const PFERDESTAERKE                          = 'PFERDESTAERKE';
    const PICOWATT                               = 'PICOWATT';
    const PONCELET                               = 'PONCELET';
    const POUND_SQUARE_FOOR_PER_CUBIC_SECOND     = 'POUND_SQUARE_FOOT_PER_CUBIC_SECOND';
    const TERAWATT                               = 'TERAWATT';
    const TON_OF_REFRIGERATION                   = 'TON_OF_REFRIGERATION';
    const WATT                                   = 'WATT';
    const YOCTOWATT                              = 'YOCTOWATT';
    const YOTTAWATT                              = 'YOTTAWATT';
    const ZEPTOWATT                              = 'ZEPTOWATT';
    const ZETTAWATT                              = 'ZETTAWATT';

    /**
     * Calculations for all power units
     *
     * @var array
     */
    protected $_units = array(
        'ATTOWATT'                    => array('1.0e-18',           'aW'),
        'BTU_PER_HOUR'                => array('0.29307197',        'BTU/h'),
        'BTU_PER_MINUTE'              => array('17.5843182',        'BTU/m'),
        'BTU_PER_SECOND'              => array('1055.059092',       'BTU/s'),
        'CALORIE_PER_HOUR'            => array(array('' => '11630', '*' => '1.0e-7'),    'cal/h'),
        'CALORIE_PER_MINUTE'          => array(array('' => '697800', '*' => '1.0e-7'),   'cal/m'),
        'CALORIE_PER_SECOND'          => array(array('' => '41868000', '*' => '1.0e-7'), 'cal/s'),
        'CENTIWATT'                   => array('0.01',              'cW'),
        'CHEVAL_VAPEUR'               => array('735.49875',         'cv'),
        'CLUSEC'                      => array('0.0000013332237',   'clusec'),
        'DECIWATT'                    => array('0.1',               'dW'),
        'DEKAWATT'                    => array('10',                'daW'),
        'DYNE_CENTIMETER_PER_HOUR'    => array(array('' => '1.0e-7','/' => '3600'), 'dyn cm/h'),
        'DYNE_CENTIMETER_PER_MINUTE'  => array(array('' => '1.0e-7','/' => '60'),   'dyn cm/m'),
        'DYNE_CENTIMETER_PER_SECOND'  => array('1.0e-7',            'dyn cm/s'),
        'ERG_PER_HOUR'                => array(array('' => '1.0e-7','/' => '3600'), 'erg/h'),
        'ERG_PER_MINUTE'              => array(array('' => '1.0e-7','/' => '60'),   'erg/m'),
        'ERG_PER_SECOND'              => array('1.0e-7',            'erg/s'),
        'EXAWATT'                     => array('1.0e+18',           'EW'),
        'FEMTOWATT'                   => array('1.0e-15',           'fW'),
        'FOOT_POUND_FORCE_PER_HOUR'   => array(array('' => '1.3558179', '/' => '3600'), 'ft lb/h'),
        'FOOT_POUND_FORCE_PER_MINUTE' => array(array('' => '1.3558179', '/' => '60'),   'ft lb/m'),
        'FOOT_POUND_FORCE_PER_SECOND' => array('1.3558179',         'ft lb/s'),
        'FOOT_POUNDAL_PER_HOUR'       => array(array('' => '0.04214011','/' => '3600'), 'ft pdl/h'),
        'FOOT_POUNDAL_PER_MINUTE'     => array(array('' => '0.04214011', '/' => '60'),  'ft pdl/m'),
        'FOOT_POUNDAL_PER_SECOND'     => array('0.04214011',        'ft pdl/s'),
        'GIGAWATT'                    => array('1.0e+9',            'GW'),
        'GRAM_FORCE_CENTIMETER_PER_HOUR' => array(array('' => '0.0000980665','/' => '3600'), 'gf cm/h'),
        'GRAM_FORCE_CENTIMETER_PER_MINUTE' => array(array('' => '0.0000980665','/' => '60'), 'gf cm/m'),
        'GRAM_FORCE_CENTIMETER_PER_SECOND' => array('0.0000980665', 'gf cm/s'),
        'HECTOWATT'                   => array('100',               'hW'),
        'HORSEPOWER_INTERNATIONAL'    => array('745.69987',         'hp'),
        'HORSEPOWER_ELECTRIC'         => array('746',               'hp'),
        'HORSEPOWER'                  => array('735.49875',         'hp'),
        'HORSEPOWER_WATER'            => array('746.043',           'hp'),
        'INCH_OUNCH_FORCE_REVOLUTION_PER_MINUTE' => array('0.00073948398',    'in ocf/m'),
        'JOULE_PER_HOUR'              => array(array('' => '1', '/' => '3600'), 'J/h'),
        'JOULE_PER_MINUTE'            => array(array('' => '1', '/' => '60'),   'J/m'),
        'JOULE_PER_SECOND'            => array('1',                 'J/s'),
        'KILOCALORIE_PER_HOUR'        => array('1.163',             'kcal/h'),
        'KILOCALORIE_PER_MINUTE'      => array('69.78',             'kcal/m'),
        'KILOCALORIE_PER_SECOND'      => array('4186.8',            'kcal/s'),
        'KILOGRAM_FORCE_METER_PER_HOUR' => array(array('' => '9.80665', '/' => '3600'), 'kgf m/h'),
        'KILOGRAM_FORCE_METER_PER_MINUTE' => array(array('' => '9.80665', '/' => '60'), 'kfg m/m'),
        'KILOGRAM_FORCE_METER_PER_SECOND' => array('9.80665',       'kfg m/s'),
        'KILOPOND_METER_PER_HOUR'     => array(array('' => '9.80665', '/' => '3600'), 'kp/h'),
        'KILOPOND_METER_PER_MINUTE'   => array(array('' => '9.80665', '/' => '60'),   'kp/m'),
        'KILOPOND_METER_PER_SECOND'   => array('9.80665',           'kp/s'),
        'KILOWATT'                    => array('1000',              'kW'),
        'MEGAWATT'                    => array('1000000',           'MW'),
        'MICROWATT'                   => array('0.000001',          'µW'),
        'MILLION_BTU_PER_HOUR'        => array('293071.07',         'mio BTU/h'),
        'MILLIWATT'                   => array('0.001',             'mM'),
        'NANOWATT'                    => array('1.0e-9',            'nN'),
        'NEWTON_METER_PER_HOUR'       => array(array('' => '1', '/' => '3600'), 'Nm/h'),
        'NEWTON_METER_PER_MINUTE'     => array(array('' => '1', '/' => '60'),   'Nm/m'),
        'NEWTON_METER_PER_SECOND'     => array('1',                 'Nm/s'),
        'PETAWATT'                    => array('1.0e+15',           'PW'),
        'PFERDESTAERKE'               => array('735.49875',         'PS'),
        'PICOWATT'                    => array('1.0e-12',           'pW'),
        'PONCELET'                    => array('980.665',           'p'),
        'POUND_SQUARE_FOOT_PER_CUBIC_SECOND' => array('0.04214011', 'lb ft²/s³'),
        'TERAWATT'                    => array('1.0e+12',           'TW'),
        'TON_OF_REFRIGERATION'        => array('3516.85284',        'RT'),
        'WATT'                        => array('1',                 'W'),
        'YOCTOWATT'                   => array('1.0e-24',           'yW'),
        'YOTTAWATT'                   => array('1.0e+24',           'YW'),
        'ZEPTOWATT'                   => array('1.0e-21',           'zW'),
        'ZETTAWATT'                   => array('1.0e+21',           'ZW'),
        'STANDARD'                    => 'WATT'
    );
}
