East oriented body

gistfile1.php

<?php

final class celsius
{
	private
		$value
	;

	function __construct($value)
	{
		$this->value = $value;
	}

	function __toString()
	{
		return (string) $this->value;
	}

	function __get($property)
	{
		return $property == 'asInteger' ? (int) $this->value : null;
	}
}

abstract class part
{
	private
		$alive
	;

	function __construct()
	{
		$this->alive = true;
	}

	function bodyIsDead()
	{
		$this->alive = false;

		return $this;
	}

	function bodyCold(celsius $celsius)
	{
		return $this;
	}

	function bodyHot(celsius $celsius)
	{
		return $this;
	}
}

final class head extends part
{
}

final class leg extends part
{
	function bodyCold(celsius $celsius)
	{
		return $this->shiver($celsius);
	}

	function bodyHot(celsius $celsius)
	{
		return $this->sweat($celsius);
	}

	private function sweat(celsius $celsius)
	{
		if ($this->alive)
		{
			echo 'Sweat' . ($celsius->asInteger <= 35 ? '' : '++') . PHP_EOL;
		}

		return $this;
	}

	private function shiver()
	{
		if ($this->alive)
		{
			echo 'Shiver' . ($celsius->asInteger <= 12 ? '' : '++') . PHP_EOL;
		}

		return $this;
	}
}

final class arm extends part
{
	function bodyCold(celsius $celsius)
	{
		return $this->shiver($celsius);
	}

	function bodyHot(celsius $celsius)
	{
		return $this->sweat($celsius);
	}

	private function sweat(celsius $celsius)
	{
		if ($this->alive)
		{
			echo 'Sweat' . ($celsius->asInteger <= 25 ? '' : '++') . PHP_EOL;
		}

		return $this;
	}

	private function shiver()
	{
		if ($this->alive)
		{
			echo 'Shiver' . ($celsius->asInteger <= 5 ? '' : '++') . PHP_EOL;
		}

		return $this;
	}
}

abstract class body
{
	private
		$parts
	;

	function __construct(part $part, part ...$parts)
	{
		parent::__construct();

		array_unshift($parts, $part); 

		$this->parts = $parts;
	}

	function headShot()
	{
		return $this->isDead();
	}

	function temperatureIs(celsius $celsius)
	{
		switch (true)
		{
			case $celsius->asInteger < -50:
				return $this->isDead();

			case $celsius->asInteger < 0:
				return $this->cold($celsius);

			case $celsius->asInteger > 30:
				return $this->hot($celsius);
		}

		return $this;
	}

	private function isDead()
	{
		foreach ($this->parts as $part)
		{
			$part->bodyIsDead();
		}

		return $this;
	}

	private function cold(celsius $celsius)
	{
		foreach ($this->parts as $part)
		{
			$part->bodyCold($celsius);
		}

		return $this;
	}

	private function hot(celsius $celsius)
	{
		foreach ($this->parts as $part)
		{
			$part->bodyHot($celsius);
		}

		return $this;
	}
}

final class human extends body
{
	function __construct()
	{
		parent::__construct(new head, new arm, new arm, new leg, new leg);
	}
}

(new human)->temperatureIs(new celsius(32))->headShot()->temperatureIs(new celsius(35));