<?php

namespace Sabre\DAV\Xml\Property;

use Sabre\DAV\Browser\HtmlOutput;
use Sabre\DAV\Browser\HtmlOutputHelper;
use Sabre\Xml\Element;
use Sabre\Xml\Reader;

/**
 * {DAV:}resourcetype property
 *
 * This class represents the {DAV:}resourcetype property, as defined in:
 *
 * https://tools.ietf.org/html/rfc4918#section-15.9
 *
 * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
 * @author Evert Pot (http://evertpot.com/)
 * @license http://sabre.io/license/ Modified BSD License
 */
class ResourceType extends Element\Elements implements HtmlOutput {

    /**
     * Constructor
     *
     * You can either pass null (for no resourcetype), a string (for a single
     * resourcetype) or an array (for multiple).
     *
     * The resourcetype must be specified in clark-notation
     *
     * @param array|string|null $resourceType
     */
    function __construct($resourceTypes = null) {

        parent::__construct((array)$resourceTypes);

    }

    /**
     * Returns the values in clark-notation
     *
     * For example array('{DAV:}collection')
     *
     * @return array
     */
    function getValue() {

        return $this->value;

    }

    /**
     * Checks if the principal contains a certain value
     *
     * @param string $type
     * @return bool
     */
    function is($type) {

        return in_array($type, $this->value);

    }

    /**
     * Adds a resourcetype value to this property
     *
     * @param string $type
     * @return void
     */
    function add($type) {

        $this->value[] = $type;
        $this->value = array_unique($this->value);

    }

    /**
     * The deserialize method is called during xml parsing.
     *
     * This method is called statictly, this is because in theory this method
     * may be used as a type of constructor, or factory method.
     *
     * Often you want to return an instance of the current class, but you are
     * free to return other data as well.
     *
     * Important note 2: You are responsible for advancing the reader to the
     * next element. Not doing anything will result in a never-ending loop.
     *
     * If you just want to skip parsing for this element altogether, you can
     * just call $reader->next();
     *
     * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
     * the next element.
     *
     * @param Reader $reader
     * @return mixed
     */
    static function xmlDeserialize(Reader $reader) {

        return
            new self(parent::xmlDeserialize($reader));

    }

    /**
     * Generate html representation for this value.
     *
     * The html output is 100% trusted, and no effort is being made to sanitize
     * it. It's up to the implementor to sanitize user provided values.
     *
     * The output must be in UTF-8.
     *
     * The baseUri parameter is a url to the root of the application, and can
     * be used to construct local links.
     *
     * @param HtmlOutputHelper $html
     * @return string
     */
    function toHtml(HtmlOutputHelper $html) {

        return implode(
            ', ',
            array_map([$html, 'xmlName'], $this->getValue())
        );

    }

}
