WithLegacyMethods.php
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WithLegacyMethods.php
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	<?php

	namespace Keruald\Database;

	use BadMethodCallException;

	trait WithLegacyMethods {

	private static function getNewMethodName (string $legacyName) : string {
	return match ($legacyName) {
	'sql_nextid' => 'nextId',
	'sql_query_express' => 'queryScalar',
	'sql_fetchrow' => 'fetchRow',
	'sql_numrows' => 'numRows',
	default => substr($legacyName, 4),
	};
	}

	protected function callByLegacyMethodName (string $name, array $arguments) {
	$newMethodName = self::getNewMethodName($name);

	if (!method_exists($this, $newMethodName)) {
	$className = get_class($this);
	throw new BadMethodCallException(
	"Legacy method doesn't exist: $className::$name"
	);
	}

	trigger_error(<<<EOF
	\$db->$name calls shall be replaced by \$db->$newMethodName calls.
	EOF
	, E_USER_DEPRECATED);

	return call_user_func_array(
	[$this, $newMethodName], $arguments
	);
	}

	}