<?php
/*
* This file is part of the Carbon package.
*
* (c) Brian Nesbitt <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Carbon;
use Closure;
use DateInterval;
use InvalidArgumentException;
use ReflectionClass;
use ReflectionFunction;
use ReflectionMethod;
use Symfony\Component\Translation\TranslatorInterface;
/**
* A simple API extension for DateInterval.
* The implementation provides helpers to handle weeks but only days are saved.
* Weeks are calculated based on the total days of the current instance.
*
* @property int $years Total years of the current interval.
* @property int $months Total months of the current interval.
* @property int $weeks Total weeks of the current interval calculated from the days.
* @property int $dayz Total days of the current interval (weeks * 7 + days).
* @property int $hours Total hours of the current interval.
* @property int $minutes Total minutes of the current interval.
* @property int $seconds Total seconds of the current interval.
* @property-read int $dayzExcludeWeeks Total days remaining in the final week of the current instance (days % 7).
* @property-read int $daysExcludeWeeks alias of dayzExcludeWeeks
* @property-read float $totalYears Number of years equivalent to the interval.
* @property-read float $totalMonths Number of months equivalent to the interval.
* @property-read float $totalWeeks Number of weeks equivalent to the interval.
* @property-read float $totalDays Number of days equivalent to the interval.
* @property-read float $totalDayz Alias for totalDays.
* @property-read float $totalHours Number of hours equivalent to the interval.
* @property-read float $totalMinutes Number of minutes equivalent to the interval.
* @property-read float $totalSeconds Number of seconds equivalent to the interval.
*
* @method static CarbonInterval years($years = 1) Create instance specifying a number of years.
* @method static CarbonInterval year($years = 1) Alias for years()
* @method static CarbonInterval months($months = 1) Create instance specifying a number of months.
* @method static CarbonInterval month($months = 1) Alias for months()
* @method static CarbonInterval weeks($weeks = 1) Create instance specifying a number of weeks.
* @method static CarbonInterval week($weeks = 1) Alias for weeks()
* @method static CarbonInterval days($days = 1) Create instance specifying a number of days.
* @method static CarbonInterval dayz($days = 1) Alias for days()
* @method static CarbonInterval day($days = 1) Alias for days()
* @method static CarbonInterval hours($hours = 1) Create instance specifying a number of hours.
* @method static CarbonInterval hour($hours = 1) Alias for hours()
* @method static CarbonInterval minutes($minutes = 1) Create instance specifying a number of minutes.
* @method static CarbonInterval minute($minutes = 1) Alias for minutes()
* @method static CarbonInterval seconds($seconds = 1) Create instance specifying a number of seconds.
* @method static CarbonInterval second($seconds = 1) Alias for seconds()
* @method CarbonInterval years($years = 1) Set the years portion of the current interval.
* @method CarbonInterval year($years = 1) Alias for years().
* @method CarbonInterval months($months = 1) Set the months portion of the current interval.
* @method CarbonInterval month($months = 1) Alias for months().
* @method CarbonInterval weeks($weeks = 1) Set the weeks portion of the current interval. Will overwrite dayz value.
* @method CarbonInterval week($weeks = 1) Alias for weeks().
* @method CarbonInterval days($days = 1) Set the days portion of the current interval.
* @method CarbonInterval dayz($days = 1) Alias for days().
* @method CarbonInterval day($days = 1) Alias for days().
* @method CarbonInterval hours($hours = 1) Set the hours portion of the current interval.
* @method CarbonInterval hour($hours = 1) Alias for hours().
* @method CarbonInterval minutes($minutes = 1) Set the minutes portion of the current interval.
* @method CarbonInterval minute($minutes = 1) Alias for minutes().
* @method CarbonInterval seconds($seconds = 1) Set the seconds portion of the current interval.
* @method CarbonInterval second($seconds = 1) Alias for seconds().
*/
class CarbonInterval extends DateInterval
{
/**
* Interval spec period designators
*/
const PERIOD_PREFIX = 'P';
const PERIOD_YEARS = 'Y';
const PERIOD_MONTHS = 'M';
const PERIOD_DAYS = 'D';
const PERIOD_TIME_PREFIX = 'T';
const PERIOD_HOURS = 'H';
const PERIOD_MINUTES = 'M';
const PERIOD_SECONDS = 'S';
/**
* A translator to ... er ... translate stuff
*
* @var \Symfony\Component\Translation\TranslatorInterface
*/
protected static $translator;
/**
* @var array|null
*/
protected static $cascadeFactors;
/**
* @var array|null
*/
private static $flipCascadeFactors;
/**
* The registered macros.
*
* @var array
*/
protected static $macros = array();
/**
* Before PHP 5.4.20/5.5.4 instead of FALSE days will be set to -99999 when the interval instance
* was created by DateTime::diff().
*/
const PHP_DAYS_FALSE = -99999;
/**
* Mapping of units and factors for cascading.
*
* Should only be modified by changing the factors or referenced constants.
*
* @return array
*/
public static function getCascadeFactors()
{
return static::$cascadeFactors ?: array(
'minutes' => array(Carbon::SECONDS_PER_MINUTE, 'seconds'),
'hours' => array(Carbon::MINUTES_PER_HOUR, 'minutes'),
'dayz' => array(Carbon::HOURS_PER_DAY, 'hours'),
'months' => array(Carbon::DAYS_PER_WEEK * Carbon::WEEKS_PER_MONTH, 'dayz'),
'years' => array(Carbon::MONTHS_PER_YEAR, 'months'),
);
}
private static function standardizeUnit($unit)
{
$unit = rtrim($unit, 'sz').'s';
return $unit === 'days' ? 'dayz' : $unit;
}
private static function getFlipCascadeFactors()
{
if (!self::$flipCascadeFactors) {
self::$flipCascadeFactors = array();
foreach (static::getCascadeFactors() as $to => $tuple) {
list($factor, $from) = $tuple;
self::$flipCascadeFactors[self::standardizeUnit($from)] = array(self::standardizeUnit($to), $factor);
}
}
return self::$flipCascadeFactors;
}
/**
* @param array $cascadeFactors
*/
public static function setCascadeFactors(array $cascadeFactors)
{
self::$flipCascadeFactors = null;
static::$cascadeFactors = $cascadeFactors;
}
/**
* Determine if the interval was created via DateTime:diff() or not.
*
* @param DateInterval $interval
*
* @return bool
*/
private static function wasCreatedFromDiff(DateInterval $interval)
{
return $interval->days !== false && $interval->days !== static::PHP_DAYS_FALSE;
}
///////////////////////////////////////////////////////////////////
//////////////////////////// CONSTRUCTORS /////////////////////////
///////////////////////////////////////////////////////////////////
/**
* Create a new CarbonInterval instance.
*
* @param int $years
* @param int $months
* @param int $weeks
* @param int $days
* @param int $hours
* @param int $minutes
* @param int $seconds
*/
public function __construct($years = 1, $months = null, $weeks = null, $days = null, $hours = null, $minutes = null, $seconds = null)
{
$spec = $years;
if (!is_string($spec) || floatval($years) || preg_match('/^[0-9.]/', $years)) {
$spec = static::PERIOD_PREFIX;
$spec .= $years > 0 ? $years.static::PERIOD_YEARS : '';
$spec .= $months > 0 ? $months.static::PERIOD_MONTHS : '';
$specDays = 0;
$specDays += $weeks > 0 ? $weeks * static::getDaysPerWeek() : 0;
$specDays += $days > 0 ? $days : 0;
$spec .= $specDays > 0 ? $specDays.static::PERIOD_DAYS : '';
if ($hours > 0 || $minutes > 0 || $seconds > 0) {
$spec .= static::PERIOD_TIME_PREFIX;
$spec .= $hours > 0 ? $hours.static::PERIOD_HOURS : '';
$spec .= $minutes > 0 ? $minutes.static::PERIOD_MINUTES : '';
$spec .= $seconds > 0 ? $seconds.static::PERIOD_SECONDS : '';
}
if ($spec === static::PERIOD_PREFIX) {
// Allow the zero interval.
$spec .= '0'.static::PERIOD_YEARS;
}
}
parent::__construct($spec);
}
/**
* Returns the factor for a given source-to-target couple.
*
* @param string $source
* @param string $target
*
* @return int|null
*/
public static function getFactor($source, $target)
{
$source = self::standardizeUnit($source);
$target = self::standardizeUnit($target);
$factors = static::getFlipCascadeFactors();
if (isset($factors[$source])) {
list($to, $factor) = $factors[$source];
if ($to === $target) {
return $factor;
}
}
return null;
}
/**
* Returns current config for days per week.
*
* @return int
*/
public static function getDaysPerWeek()
{
return static::getFactor('dayz', 'weeks') ?: Carbon::DAYS_PER_WEEK;
}
/**
* Returns current config for hours per day.
*
* @return int
*/
public static function getHoursPerDay()
{
return static::getFactor('hours', 'dayz') ?: Carbon::HOURS_PER_DAY;
}
/**
* Returns current config for minutes per hour.
*
* @return int
*/
public static function getMinutesPerHours()
{
return static::getFactor('minutes', 'hours') ?: Carbon::MINUTES_PER_HOUR;
}
/**
* Returns current config for seconds per minute.
*
* @return int
*/
public static function getSecondsPerMinutes()
{
return static::getFactor('seconds', 'minutes') ?: Carbon::SECONDS_PER_MINUTE;
}
/**
* Create a new CarbonInterval instance from specific values.
* This is an alias for the constructor that allows better fluent
* syntax as it allows you to do CarbonInterval::create(1)->fn() rather than
* (new CarbonInterval(1))->fn().
*
* @param int $years
* @param int $months
* @param int $weeks
* @param int $days
* @param int $hours
* @param int $minutes
* @param int $seconds
*
* @return static
*/
public static function create($years = 1, $months = null, $weeks = null, $days = null, $hours = null, $minutes = null, $seconds = null)
{
return new static($years, $months, $weeks, $days, $hours, $minutes, $seconds);
}
/**
* Get a copy of the instance.
*
* @return static
*/
public function copy()
{
$date = new static($this->spec());
$date->invert = $this->invert;
return $date;
}
/**
* Provide static helpers to create instances. Allows CarbonInterval::years(3).
*
* Note: This is done using the magic method to allow static and instance methods to
* have the same names.
*
* @param string $name
* @param array $args
*
* @return static
*/
public static function __callStatic($name, $args)
{
$arg = count($args) === 0 ? 1 : $args[0];
switch ($name) {
case 'years':
case 'year':
return new static($arg);
case 'months':
case 'month':
return new static(null, $arg);
case 'weeks':
case 'week':
return new static(null, null, $arg);
case 'days':
case 'dayz':
case 'day':
return new static(null, null, null, $arg);
case 'hours':
case 'hour':
return new static(null, null, null, null, $arg);
case 'minutes':
case 'minute':
return new static(null, null, null, null, null, $arg);
case 'seconds':
case 'second':
return new static(null, null, null, null, null, null, $arg);
}
if (static::hasMacro($name)) {
return call_user_func_array(
array(new static(0), $name), $args
);
}
}
/**
* Creates a CarbonInterval from string.
*
* Format:
*
* Suffix | Unit | Example | DateInterval expression
* -------|---------|---------|------------------------
* y | years | 1y | P1Y
* mo | months | 3mo | P3M
* w | weeks | 2w | P2W
* d | days | 28d | P28D
* h | hours | 4h | PT4H
* m | minutes | 12m | PT12M
* s | seconds | 59s | PT59S
*
* e. g. `1w 3d 4h 32m 23s` is converted to 10 days 4 hours 32 minutes and 23 seconds.
*
* Special cases:
* - An empty string will return a zero interval
* - Fractions are allowed for weeks, days, hours and minutes and will be converted
* and rounded to the next smaller value (caution: 0.5w = 4d)
*
* @param string $intervalDefinition
*
* @return static
*/
public static function fromString($intervalDefinition)
{
if (empty($intervalDefinition)) {
return new static(0);
}
$years = 0;
$months = 0;
$weeks = 0;
$days = 0;
$hours = 0;
$minutes = 0;
$seconds = 0;
$pattern = '/(\d+(?:\.\d+)?)\h*([^\d\h]*)/i';
preg_match_all($pattern, $intervalDefinition, $parts, PREG_SET_ORDER);
while ($match = array_shift($parts)) {
list($part, $value, $unit) = $match;
$intValue = intval($value);
$fraction = floatval($value) - $intValue;
switch (strtolower($unit)) {
case 'year':
case 'years':
case 'y':
$years += $intValue;
break;
case 'month':
case 'months':
case 'mo':
$months += $intValue;
break;
case 'week':
case 'weeks':
case 'w':
$weeks += $intValue;
if ($fraction) {
$parts[] = array(null, $fraction * static::getDaysPerWeek(), 'd');
}
break;
case 'day':
case 'days':
case 'd':
$days += $intValue;
if ($fraction) {
$parts[] = array(null, $fraction * static::getHoursPerDay(), 'h');
}
break;
case 'hour':
case 'hours':
case 'h':
$hours += $intValue;
if ($fraction) {
$parts[] = array(null, $fraction * static::getMinutesPerHours(), 'm');
}
break;
case 'minute':
case 'minutes':
case 'm':
$minutes += $intValue;
if ($fraction) {
$seconds += round($fraction * static::getSecondsPerMinutes());
}
break;
case 'second':
case 'seconds':
case 's':
$seconds += $intValue;
break;
default:
throw new InvalidArgumentException(
sprintf('Invalid part %s in definition %s', $part, $intervalDefinition)
);
}
}
return new static($years, $months, $weeks, $days, $hours, $minutes, $seconds);
}
/**
* Create a CarbonInterval instance from a DateInterval one. Can not instance
* DateInterval objects created from DateTime::diff() as you can't externally
* set the $days field.
*
* @param DateInterval $di
*
* @return static
*/
public static function instance(DateInterval $di)
{
$instance = new static(static::getDateIntervalSpec($di));
$instance->invert = $di->invert;
return $instance;
}
/**
* Make a CarbonInterval instance from given variable if possible.
*
* Always return a new instance. Parse only strings and only these likely to be intervals (skip dates
* and recurrences). Throw an exception for invalid format, but otherwise return null.
*
* @param mixed $var
*
* @return static|null
*/
public static function make($var)
{
if ($var instanceof DateInterval) {
return static::instance($var);
}
if (is_string($var)) {
$var = trim($var);
if (substr($var, 0, 1) === 'P') {
return new static($var);
}
if (preg_match('/^(?:\h*\d+(?:\.\d+)?\h*[a-z]+)+$/i', $var)) {
return static::fromString($var);
}
}
}
///////////////////////////////////////////////////////////////////
/////////////////////// LOCALIZATION //////////////////////////////
///////////////////////////////////////////////////////////////////
/**
* Initialize the translator instance if necessary.
*
* @return \Symfony\Component\Translation\TranslatorInterface
*/
protected static function translator()
{
if (static::$translator === null) {
static::$translator = Translator::get();
}
return static::$translator;
}
/**
* Get the translator instance in use.
*
* @return \Symfony\Component\Translation\TranslatorInterface
*/
public static function getTranslator()
{
return static::translator();
}
/**
* Set the translator instance to use.
*
* @param TranslatorInterface $translator
*/
public static function setTranslator(TranslatorInterface $translator)
{
static::$translator = $translator;
}
/**
* Get the current translator locale.
*
* @return string
*/
public static function getLocale()
{
return static::translator()->getLocale();
}
/**
* Set the current translator locale.
*
* @param string $locale
*/
public static function setLocale($locale)
{
return static::translator()->setLocale($locale) !== false;
}
///////////////////////////////////////////////////////////////////
///////////////////////// GETTERS AND SETTERS /////////////////////
///////////////////////////////////////////////////////////////////
/**
* Get a part of the CarbonInterval object.
*
* @param string $name
*
* @throws \InvalidArgumentException
*
* @return int|float
*/
public function __get($name)
{
if (substr($name, 0, 5) === 'total') {
return $this->total(substr($name, 5));
}
switch ($name) {
case 'years':
return $this->y;
case 'months':
return $this->m;
case 'dayz':
return $this->d;
case 'hours':
return $this->h;
case 'minutes':
return $this->i;
case 'seconds':
return $this->s;
case 'weeks':
return (int) floor($this->d / static::getDaysPerWeek());
case 'daysExcludeWeeks':
case 'dayzExcludeWeeks':
return $this->d % static::getDaysPerWeek();
default:
throw new InvalidArgumentException(sprintf("Unknown getter '%s'", $name));
}
}
/**
* Set a part of the CarbonInterval object.
*
* @param string $name
* @param int $val
*
* @throws \InvalidArgumentException
*/
public function __set($name, $val)
{
switch ($name) {
case 'years':
$this->y = $val;
break;
case 'months':
$this->m = $val;
break;
case 'weeks':
$this->d = $val * static::getDaysPerWeek();
break;
case 'dayz':
$this->d = $val;
break;
case 'hours':
$this->h = $val;
break;
case 'minutes':
$this->i = $val;
break;
case 'seconds':
$this->s = $val;
break;
}
}
/**
* Allow setting of weeks and days to be cumulative.
*
* @param int $weeks Number of weeks to set
* @param int $days Number of days to set
*
* @return static
*/
public function weeksAndDays($weeks, $days)
{
$this->dayz = ($weeks * static::getDaysPerWeek()) + $days;
return $this;
}
/**
* Register a custom macro.
*
* @param string $name
* @param object|callable $macro
*
* @return void
*/
public static function macro($name, $macro)
{
static::$macros[$name] = $macro;
}
/**
* Register macros from a mixin object.
*
* @param object $mixin
*
* @throws \ReflectionException
*
* @return void
*/
public static function mixin($mixin)
{
$reflection = new ReflectionClass($mixin);
$methods = $reflection->getMethods(
ReflectionMethod::IS_PUBLIC | ReflectionMethod::IS_PROTECTED
);
foreach ($methods as $method) {
$method->setAccessible(true);
static::macro($method->name, $method->invoke($mixin));
}
}
/**
* Check if macro is registered.
*
* @param string $name
*
* @return bool
*/
public static function hasMacro($name)
{
return isset(static::$macros[$name]);
}
/**
* Call given macro.
*
* @param string $name
* @param array $parameters
*
* @return mixed
*/
protected function callMacro($name, $parameters)
{
$macro = static::$macros[$name];
$reflection = new ReflectionFunction($macro);
$reflectionParameters = $reflection->getParameters();
$expectedCount = count($reflectionParameters);
$actualCount = count($parameters);
if ($expectedCount > $actualCount && $reflectionParameters[$expectedCount - 1]->name === 'self') {
for ($i = $actualCount; $i < $expectedCount - 1; $i++) {
$parameters[] = $reflectionParameters[$i]->getDefaultValue();
}
$parameters[] = $this;
}
if ($macro instanceof Closure && method_exists($macro, 'bindTo')) {
$macro = $macro->bindTo($this, get_class($this));
}
return call_user_func_array($macro, $parameters);
}
/**
* Allow fluent calls on the setters... CarbonInterval::years(3)->months(5)->day().
*
* Note: This is done using the magic method to allow static and instance methods to
* have the same names.
*
* @param string $name
* @param array $args
*
* @return static
*/
public function __call($name, $args)
{
if (static::hasMacro($name)) {
return $this->callMacro($name, $args);
}
$arg = count($args) === 0 ? 1 : $args[0];
switch ($name) {
case 'years':
case 'year':
$this->years = $arg;
break;
case 'months':
case 'month':
$this->months = $arg;
break;
case 'weeks':
case 'week':
$this->dayz = $arg * static::getDaysPerWeek();
break;
case 'days':
case 'dayz':
case 'day':
$this->dayz = $arg;
break;
case 'hours':
case 'hour':
$this->hours = $arg;
break;
case 'minutes':
case 'minute':
$this->minutes = $arg;
break;
case 'seconds':
case 'second':
$this->seconds = $arg;
break;
}
return $this;
}
/**
* Get the current interval in a human readable format in the current locale.
*
* @param bool $short (false by default), returns short units if true
*
* @return string
*/
public function forHumans($short = false)
{
$periods = array(
'year' => array('y', $this->years),
'month' => array('m', $this->months),
'week' => array('w', $this->weeks),
'day' => array('d', $this->daysExcludeWeeks),
'hour' => array('h', $this->hours),
'minute' => array('min', $this->minutes),
'second' => array('s', $this->seconds),
);
$parts = array();
foreach ($periods as $unit => $options) {
list($shortUnit, $count) = $options;
if ($count > 0) {
$parts[] = static::translator()->transChoice($short ? $shortUnit : $unit, $count, array(':count' => $count));
}
}
return implode(' ', $parts);
}
/**
* Format the instance as a string using the forHumans() function.
*
* @return string
*/
public function __toString()
{
return $this->forHumans();
}
/**
* Convert the interval to a CarbonPeriod.
*
* @return CarbonPeriod
*/
public function toPeriod()
{
return CarbonPeriod::createFromArray(
array_merge(array($this), func_get_args())
);
}
/**
* Invert the interval.
*
* @return $this
*/
public function invert()
{
$this->invert = $this->invert ? 0 : 1;
return $this;
}
/**
* Add the passed interval to the current instance.
*
* @param DateInterval $interval
*
* @return static
*/
public function add(DateInterval $interval)
{
$sign = $interval->invert === 1 ? -1 : 1;
if (static::wasCreatedFromDiff($interval)) {
$this->dayz += $interval->days * $sign;
} else {
$this->years += $interval->y * $sign;
$this->months += $interval->m * $sign;
$this->dayz += $interval->d * $sign;
$this->hours += $interval->h * $sign;
$this->minutes += $interval->i * $sign;
$this->seconds += $interval->s * $sign;
}
return $this;
}
/**
* Multiply current instance given number of times
*
* @param float $factor
*
* @return $this
*/
public function times($factor)
{
if ($factor < 0) {
$this->invert = $this->invert ? 0 : 1;
$factor = -$factor;
}
$this->years = (int) round($this->years * $factor);
$this->months = (int) round($this->months * $factor);
$this->dayz = (int) round($this->dayz * $factor);
$this->hours = (int) round($this->hours * $factor);
$this->minutes = (int) round($this->minutes * $factor);
$this->seconds = (int) round($this->seconds * $factor);
return $this;
}
/**
* Get the interval_spec string of a date interval.
*
* @param DateInterval $interval
*
* @return string
*/
public static function getDateIntervalSpec(DateInterval $interval)
{
$date = array_filter(array(
static::PERIOD_YEARS => $interval->y,
static::PERIOD_MONTHS => $interval->m,
static::PERIOD_DAYS => $interval->d,
));
$time = array_filter(array(
static::PERIOD_HOURS => $interval->h,
static::PERIOD_MINUTES => $interval->i,
static::PERIOD_SECONDS => $interval->s,
));
$specString = static::PERIOD_PREFIX;
foreach ($date as $key => $value) {
$specString .= $value.$key;
}
if (count($time) > 0) {
$specString .= static::PERIOD_TIME_PREFIX;
foreach ($time as $key => $value) {
$specString .= $value.$key;
}
}
return $specString === static::PERIOD_PREFIX ? 'PT0S' : $specString;
}
/**
* Get the interval_spec string.
*
* @return string
*/
public function spec()
{
return static::getDateIntervalSpec($this);
}
/**
* Comparing 2 date intervals.
*
* @param DateInterval $a
* @param DateInterval $b
*
* @return int
*/
public static function compareDateIntervals(DateInterval $a, DateInterval $b)
{
$current = Carbon::now();
$passed = $current->copy()->add($b);
$current->add($a);
if ($current < $passed) {
return -1;
}
if ($current > $passed) {
return 1;
}
return 0;
}
/**
* Comparing with passed interval.
*
* @param DateInterval $interval
*
* @return int
*/
public function compare(DateInterval $interval)
{
return static::compareDateIntervals($this, $interval);
}
/**
* Convert overflowed values into bigger units.
*
* @return $this
*/
public function cascade()
{
foreach (static::getFlipCascadeFactors() as $source => $cascade) {
list($target, $factor) = $cascade;
if ($source === 'dayz' && $target === 'weeks') {
continue;
}
$value = $this->$source;
$this->$source = $modulo = $value % $factor;
$this->$target += ($value - $modulo) / $factor;
}
return $this;
}
/**
* Get amount of given unit equivalent to the interval.
*
* @param string $unit
*
* @throws \InvalidArgumentException
*
* @return float
*/
public function total($unit)
{
$realUnit = $unit = strtolower($unit);
if (in_array($unit, array('days', 'weeks'))) {
$realUnit = 'dayz';
} elseif (!in_array($unit, array('seconds', 'minutes', 'hours', 'dayz', 'months', 'years'))) {
throw new InvalidArgumentException("Unknown unit '$unit'.");
}
$result = 0;
$cumulativeFactor = 0;
$unitFound = false;
foreach (static::getFlipCascadeFactors() as $source => $cascade) {
list($target, $factor) = $cascade;
if ($source === $realUnit) {
$unitFound = true;
$result += $this->$source;
$cumulativeFactor = 1;
}
if ($factor === false) {
if ($unitFound) {
break;
}
$result = 0;
$cumulativeFactor = 0;
continue;
}
if ($target === $realUnit) {
$unitFound = true;
}
if ($cumulativeFactor) {
$cumulativeFactor *= $factor;
$result += $this->$target * $cumulativeFactor;
continue;
}
$result = ($result + $this->$source) / $factor;
}
if (isset($target) && !$cumulativeFactor) {
$result += $this->$target;
}
if (!$unitFound) {
throw new \InvalidArgumentException("Unit $unit have no configuration to get total from other units.");
}
if ($unit === 'weeks') {
return $result / static::getDaysPerWeek();
}
return $result;
}
}