InstancesRepository.php
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InstancesRepository.php
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	<?php

	namespace Nasqueron\SAAS\MediaWiki;

	use Nasqueron\SAAS\InstanceNotFoundException;

	abstract class InstancesRepository {

	///
	/// Repository data methods
	///

	abstract static public function getList () : array;
	abstract static public function getAliases () : array;

	///
	/// Helper methods
	///

	/**
	* @throws InstanceNotFoundException
	*/
	public static function getCanonicalHost (string $host) : string {
	$canonicalList = static::getList();

	// Case 1 - the host is canonical
	if (array_key_exists($host, $canonicalList)) {
	return $host;
	}

	// Case 2 - the host is an alias
	foreach (static::getAliases() as $database => $vhosts) {
	if (in_array($host, $vhosts)) {
	return array_search($database, $canonicalList);
	}
	}

	throw new InstanceNotFoundException($host);
	}

	/**
	* @throws InstanceNotFoundException
	*/
	public static function getDatabaseFromHost (string $host) : string {
	$canonicalHost = self::getCanonicalHost($host);
	return static::getList()[$canonicalHost];
	}

	}