monitor_layout/app/Configuration.php

<?php

namespace App;

use Symfony\Component\Yaml\Yaml;

class Configuration
{
	protected $_screens;
	protected $_layouts;

	public function __construct()
	{
		$this->_screens = [];
		$this->_layouts = [];
	}

	public function load(string $file): void
	{
		$config = Yaml::parseFile($file);

		foreach ($config['screens'] as $screen_name=>$screen)
		{
			$this->_screens[$screen_name] = app()->make(\App\Screen::class, [
				'outputs'=>is_array($screen['output']) ? $screen['output'] : [$screen['output']]
			]);
		}

		foreach ($config['layouts'] as $layout=>$data)
		{
			$this->_layouts[$layout] = app()->make(\App\Layout::class, ['screens'=>$data['screens'], 'links'=>$data['links']]);
		}
	}

	public function getScreen(string $screen): Screen
	{
		return $this->_screens[$screen];
	}

	public function getPrimaryScreen(): Screen
	{
		return $this->getScreen($this->getPrimaryScreenName());
	}

	public function getPrimaryScreenName(): string
	{
		foreach ($this->_screens as $name=>$screen)
		{
			if ($screen->isPrimary())
				return $name;
		}
	}

	public function getLayout(string $layout): Layout
	{
		return $this->_layouts[$layout];
	}

	public function getLayouts(): array
	{
		return $this->_layouts;
	}

}