<?php

namespace Psr\Link;

/**
 * A readable link object.
 */
interface LinkInterface
{
    /**
     * Returns the target of the link.
     *
     * The target link must be one of:
     * - An absolute URI, as defined by RFC 5988.
     * - A relative URI, as defined by RFC 5988. The base of the relative link
     *     is assumed to be known based on context by the client.
     * - A URI template as defined by RFC 6570.
     *
     * If a URI template is returned, isTemplated() MUST return True.
     *
     * @return string
     */
    public function getHref();

    /**
     * Returns whether or not this is a templated link.
     *
     * @return bool
     *   True if this link object is templated, False otherwise.
     */
    public function isTemplated();

    /**
     * Returns the relationship type(s) of the link.
     *
     * This method returns 0 or more relationship types for a link, expressed
     * as an array of strings.
     *
     * @return string[]
     */
    public function getRels();

    /**
     * Returns a list of attributes that describe the target URI.
     *
     * @return array
     *   A key-value list of attributes, where the key is a string and the value
     *  is either a PHP primitive or an array of PHP strings. If no values are
     *  found an empty array MUST be returned.
     */
    public function getAttributes();
}