class IdentificationHeader

final class IdentificationHeader extends AbstractHeader {
    private array $ids = [];
    private array $idsAsAddresses = [];
    public function __construct(string $name, string|array $ids) {
        parent::__construct($name);
        $this->setId($ids);
    }
    
    /**
     * @param string|string[] $body a string ID or an array of IDs
     *
     * @throws RfcComplianceException
     */
    public function setBody(mixed $body) : void {
        $this->setId($body);
    }
    public function getBody() : array {
        return $this->getIds();
    }
    
    /**
     * Set the ID used in the value of this header.
     *
     * @param string|string[] $id
     *
     * @throws RfcComplianceException
     */
    public function setId(string|array $id) : void {
        $this->setIds(\is_array($id) ? $id : [
            $id,
        ]);
    }
    
    /**
     * Get the ID used in the value of this Header.
     *
     * If multiple IDs are set only the first is returned.
     */
    public function getId() : ?string {
        return $this->ids[0] ?? null;
    }
    
    /**
     * Set a collection of IDs to use in the value of this Header.
     *
     * @param string[] $ids
     *
     * @throws RfcComplianceException
     */
    public function setIds(array $ids) : void {
        $this->ids = [];
        $this->idsAsAddresses = [];
        foreach ($ids as $id) {
            $this->idsAsAddresses[] = new Address($id);
            $this->ids[] = $id;
        }
    }
    
    /**
     * Get the list of IDs used in this Header.
     *
     * @return string[]
     */
    public function getIds() : array {
        return $this->ids;
    }
    public function getBodyAsString() : string {
        $addrs = [];
        foreach ($this->idsAsAddresses as $address) {
            $addrs[] = '<' . $address->toString() . '>';
        }
        return implode(' ', $addrs);
    }

}