Cloud.php

<?php

namespace Lucinda\RSS;

/**
 * Encapsulates a RSS cloud tag according to specifications:
 * https://www.rssboard.org/rss-profile#element-channel-cloud
 */
class Cloud implements Tag
{
    private string $domain;
    private int $port;
    private string $path;
    private string $registerProcedure;
    private string $protocol;

    /**
     * Cloud constructor.
     *
     * @param  string  $domain            Domain name of RSS cloud provider
     * @param  integer $port              Port to connect on that domain
     * @param  string  $path              Url to connect to on that domain
     * @param  string  $registerProcedure RSS register procedure on that url
     * @param  string  $protocol          Protocol to be used in connecting to domain.
     * @throws Exception If domain is invalid
     */
    public function __construct(string $domain, int $port, string $path, string $registerProcedure, string $protocol)
    {
        if (!filter_var($domain, FILTER_VALIDATE_DOMAIN)) {
            throw new Exception("Invalid domain");
        }
        $this->domain = $domain;
        $this->port = $port;
        $this->path = $path;
        $this->registerProcedure = $registerProcedure;
        $this->protocol = $protocol;
    }

    /**
     * {@inheritDoc}
     *
     * @see Tag::__toString()
     */
    public function __toString(): string
    {
        $output = "";
        $vars = get_object_vars($this);
        foreach ($vars as $key=>$value) {
            $output .= $key.'="'.$value.'" ';
        }
        return "<cloud ".$output."/>";
    }
}