East oriented movie lister

gistfile1.php

<?php

namespace east\movie\library\finder;

use
	east,
	east\movie,
	east\movie\library
;

interface selector
{
	function movieLibraryIs(movie\library $library);
	function movieDirectorShouldBe(movie\director $director);
	function movieTitleShouldBe(movie\title $title);
	function movieIs(movie $movie);
	function movieDirectorIs(movie\director $director);
	function movieTitleIs(movie\title $title);
}

namespace east\movie\library\finder\selector;

use
	east,
	east\movie,
	east\movie\library,
	east\movie\library\finder
;

class directorAndTitle implements finder\selector
{
	private
		$library,
		$directorCriteria,
		$movieDirector,
		$titleCriteria,
		$movieTitle
	;

	function __construct()
	{
		$this->library = new library\void;
	}

	function movieLibraryIs(library $library)
	{
		$selector = clone $this;
		$selector->library = $library;

		return $selector;
	}

	function movieDirectorShouldBe(movie\director $director)
	{
		$selector = clone $this;
		$selector->directorCriteria = $director;

		return $selector;
	}

	function movieTitleShouldBe(movie\title $title)
	{
		$selector->titleCriteria = $title;

		return $selector;
	}

	function movieIs(movie $movie)
	{
		$selector = clone $this;
		$selector->movieDirector = null;
		$selector->movieTitle = null;

		$movie->selectorIs($selector);

		switch (true)
		{
			case $selector->directorCriteria && $selector->titleCriteria && $selector->movieDirector == $selector->directorCriteria && $selector->movieTitle == $selector->titleCriteria:
			case $selector->directorCriteria && ! $selector->titleCriteria && $selector->movieDirector == $selector->directorCriteria:
			case $selector->titleCriteria && ! $selector->directorCriteria && $selector->movieTitle == $selector->titleCriteria:
				$this->library->newMovie($movie);
		}

		return $this;
	}

	function movieDirectorIs(movie\director $director)
	{
		$this->movieDirector = $director;

		return $this;
	}

	function movieTitleIs(movie\title $title)
	{
		$this->movieTitle = $title;

		return $this;
	}
}

namespace east\movie\library;

use
	east\movie
;

interface finder
{
	function movieDirectorShouldBe(movie\director $director);
	function movieTitleShouldBe(movie\title $title);
	function movieIs(movie $movie);
	function movieLibraryIs(movie\library $library);
	function movieListerIs(movie\lister $lister);
}

namespace east\movie\library\finder;

use
	east\movie,
	east\movie\library
;

class generic implements library\finder
{
	private
		$selector,
		$library
	;

	function __construct(finder\selector $selector = null)
	{
		$this->selector = $selector ?: new library\finder\selector\directorAndTitle;
	}

	function movieDirectorShouldBe(movie\director $director)
	{
		$finder = clone $this;
		$finder->selector = $this->selector->movieDirectorShouldBe($director);

		return $finder;
	}

	function movieTitleShouldBe(movie\title $title)
	{
		$finder = clone $this;
		$finder->selector = $this->selector->movieTitleShouldBe($title);

		return $finder;
	}

	function movieIs(movie $movie)
	{
		$this->selector->movieIs($movie);

		return $this;
	}

	function movieLibraryIs(movie\library $library)
	{
		$finder = clone $this;
		$finder->library = new movie\library\void;
		$finder->selector = $this->selector->movieLibraryIs($finder->library);

		$library->finderIs($finder);

		return $finder;
	}

	function movieListerIs(movie\lister $lister)
	{
		$lister->movieProviderIs($this->library);

		return $this;
	}
}

namespace east\movie\lister;

use
	east\movie
;

class cli implements movie\lister
{
	function newMovie()
	{
		echo '-------------------------' . PHP_EOL;

		return $this;
	}

	function noMoreDataAboutMovie()
	{
		return $this;
	}

	function movieDirectorIs(movie\director $director)
	{
		echo 'Director: ' . $director . PHP_EOL;

		return $this;
	}

	function movieTitleIs(movie\title $title)
	{
		echo 'Title: ' . $title . PHP_EOL;

		return $this;
	}

	function movieProviderIs(movie\provider $movieProvider)
	{
		$movieProvider->movieListerIs($this);

		return $this;
	}
}

namespace east;

use
	east\movie
;

interface movie extends movie\provider
{
	function selectorIs(movie\library\finder\selector $selector);
}

namespace east\movie;

use
	east,
	east\movie
;

interface provider
{
	function movieListerIs(lister $lister);
}

interface library extends provider
{
	function newMovie(east\movie $movie);
	function finderIs(library\finder $finder);
}

interface lister
{
	function newMovie();
	function noMoreDataAboutMovie();
	function movieDirectorIs(movie\director $director);
	function movieTitleIs(movie\title $title);
	function movieProviderIs(movie\provider $provider);
}

final class director
{
	private
		$value
	;

	function __construct($value)
	{
		if (! is_string($value))
		{
			throw new \domainException('Movie Director should be a string');
		}

		$this->value = $value;
	}

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

final class title
{
	private
		$value
	;

	function __construct($value)
	{
		if (! is_string($value))
		{
			throw new \domainException('Movie title should be a string');
		}

		$this->value = $value;
	}

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

final class blockbuster implements east\movie
{
	private
		$director,
		$title
	;

	function __construct(movie\director $director, movie\title $title)
	{
		$this->director = $director;
		$this->title = $title;
	}

	function selectorIs(movie\library\finder\selector $selector)
	{
		$selector
			->movieDirectorIs($this->director)
			->movieTitleIs($this->title)
		;

		return $this;
	}

	function movieListerIs(movie\lister $lister)
	{
		$lister
			->newMovie()
				->movieTitleIs($this->title)
				->movieDirectorIs($this->director)
					->noMoreDataAboutMovie()
		;

		return $this;
	}
}

namespace east\movie\library;

use
	east,
	east\movie,
	east\movie\library
;

class void implements movie\library
{
	private
		$movies
	;

	function __construct()
	{
		$this->movies = [];
	}

	function newMovie(movie $movie)
	{
		$this->movies[] = $movie;

		return $this;
	}

	function finderIs(library\finder $finder)
	{
		foreach ($this->movies as $movie)
		{
			$finder->movieIs($movie);
		}

		return $this;
	}

	function movieListerIs(movie\lister $lister)
	{
		foreach ($this->movies as $movie)
		{
			$lister->movieProviderIs($movie);
		}

		return $this;
	}
}

namespace east;

use
	east\movie
;

(new movie\library\finder\generic)
	->movieDirectorShouldBe(new movie\Director('Ridley Scott'))
		->movieLibraryIs((new movie\library\void)
				->newMovie(new movie\blockbuster(new movie\director('Ridley Scott'), new movie\title('Alien')))
				->newMovie(new movie\blockbuster(new movie\director('Christopher Nolan'), new movie\title('Interstellar')))
				->newMovie(new movie\blockbuster(new movie\director('Ridley Scott'), new movie\title('Gladiator')))
		)
			->movieListerIs(new movie\lister\cli)
;