ComposerVersionNormalizer.php

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<?php

class ComposerVersionNormalizer {

    public function normalizeSuffix( $version ) {
        if ( !is_string( $version ) ) {
            throw new InvalidArgumentException( '$version must be a string' );
        }

        return preg_replace( '/^(\d[\d\.]*)([a-zA-Z]+)(\d*)$/', '$1-$2$3', $version, 1 );
    }

    public function normalizeLevelCount( $version ) {
        if ( !is_string( $version ) ) {
            throw new InvalidArgumentException( '$version must be a string' );
        }

        $dashPosition = strpos( $version, '-' );

        if ( $dashPosition !== false ) {
            $suffix = substr( $version, $dashPosition );
            $version = substr( $version, 0, $dashPosition );
        }

        $version = implode( '.', array_pad( explode( '.', $version ), 4, '0' ) );

        if ( $dashPosition !== false ) {
            $version .= $suffix;
        }

        return $version;
    }
}