<?php

namespace Sabre\DAVACL;

use Sabre\DAV\Exception\InvalidResourceType;
use Sabre\DAV\IExtendedCollection;
use Sabre\DAV\MkCol;

/**
 * Principals Collection.
 *
 * This collection represents a list of users.
 * The users are instances of Sabre\DAVACL\Principal
 *
 * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
 * @author Evert Pot (http://evertpot.com/)
 * @license http://sabre.io/license/ Modified BSD License
 */
class PrincipalCollection extends AbstractPrincipalCollection implements IExtendedCollection, IACL
{
    use ACLTrait;

    /**
     * This method returns a node for a principal.
     *
     * The passed array contains principal information, and is guaranteed to
     * at least contain a uri item. Other properties may or may not be
     * supplied by the authentication backend.
     *
     * @return \Sabre\DAV\INode
     */
    public function getChildForPrincipal(array $principal)
    {
        return new Principal($this->principalBackend, $principal);
    }

    /**
     * Creates a new collection.
     *
     * This method will receive a MkCol object with all the information about
     * the new collection that's being created.
     *
     * The MkCol object contains information about the resourceType of the new
     * collection. If you don't support the specified resourceType, you should
     * throw Exception\InvalidResourceType.
     *
     * The object also contains a list of WebDAV properties for the new
     * collection.
     *
     * You should call the handle() method on this object to specify exactly
     * which properties you are storing. This allows the system to figure out
     * exactly which properties you didn't store, which in turn allows other
     * plugins (such as the propertystorage plugin) to handle storing the
     * property for you.
     *
     * @param string $name
     *
     * @throws InvalidResourceType
     */
    public function createExtendedCollection($name, MkCol $mkCol)
    {
        if (!$mkCol->hasResourceType('{DAV:}principal')) {
            throw new InvalidResourceType('Only resources of type {DAV:}principal may be created here');
        }

        $this->principalBackend->createPrincipal(
            $this->principalPrefix.'/'.$name,
            $mkCol
        );
    }

    /**
     * Returns a list of ACE's for this node.
     *
     * Each ACE has the following properties:
     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
     *     currently the only supported privileges
     *   * 'principal', a url to the principal who owns the node
     *   * 'protected' (optional), indicating that this ACE is not allowed to
     *      be updated.
     *
     * @return array
     */
    public function getACL()
    {
        return [
            [
                'principal' => '{DAV:}authenticated',
                'privilege' => '{DAV:}read',
                'protected' => true,
            ],
        ];
    }
}
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