DockerImage.php
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DockerImage.php
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	<?php

	namespace Keruald\DockerHub;

	use InvalidArgumentException;

	abstract class DockerImage {

	///
	/// Public properties
	///

	/**
	* @var string
	*/
	public $registry;

	/**
	* @var string
	*/
	public $user;

	/**
	* @var string
	*/
	public $image;

	///
	/// Constructors
	///

	/**
	* Initializes a new instance of a DockerImage object.
	*
	* @param string $user
	* @param string $image
	*/
	public function __construct ($user, $image) {
	$this->user = $user;
	$this->image = $image;
	}

	/**
	* Initializes a new instance of a DockerImage object
	* from the slash notation.
	*
	* @param string $image the full user image name (e.g. "acme/foo")
	* @return DockerImage
	*
	* @throws InvalidArgumentException when image name doesn't contain a slash.
	*/
	public static function loadFromSlashNotation ($image) {
	if (strpos($image, '/') === false) {
	throw new InvalidArgumentException("Image name doesn't contain a slash (/).");
	}

	$imageFragments = explode('/', $image, 2);
	return new static(...$imageFragments);
	}

	///
	/// Helper methods
	///

	/**
	* Gets the URL to the image on the registry.
	*
	* @return string
	*/
	public abstract function getRegistryUrl();

	}