<?php
  
  /**
   * The ICollection Interface
   *
   * This interface should be implemented by each class that represents a collection
   *
   * @package Sabre
   * @subpackage DAV
   * @copyright Copyright (C) 2007-2013 Rooftop Solutions. All rights reserved.
   * @author Evert Pot (http://www.rooftopsolutions.nl/)
   * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
   */
  interface Sabre_DAV_ICollection extends Sabre_DAV_INode {
  
      /**
       * Creates a new file in the directory
       *
       * Data will either be supplied as a stream resource, or in certain cases
       * as a string. Keep in mind that you may have to support either.
       *
       * After successful creation of the file, you may choose to return the ETag
       * of the new file here.
       *
       * The returned ETag must be surrounded by double-quotes (The quotes should
       * be part of the actual string).
       *
       * If you cannot accurately determine the ETag, you should not return it.
       * If you don't store the file exactly as-is (you're transforming it
       * somehow) you should also not return an ETag.
       *
       * This means that if a subsequent GET to this new file does not exactly
       * return the same contents of what was submitted here, you are strongly
       * recommended to omit the ETag.
       *
       * @param string $name Name of the file
       * @param resource|string $data Initial payload
       * @return null|string
       */
      function createFile($name, $data = null);
  
      /**
       * Creates a new subdirectory
       *
       * @param string $name
       * @return void
       */
      function createDirectory($name);
  
      /**
       * Returns a specific child node, referenced by its name
       *
       * This method must throw Sabre_DAV_Exception_NotFound if the node does not
       * exist.
       *
       * @param string $name
       * @return Sabre_DAV_INode
       */
      function getChild($name);
  
      /**
       * Returns an array with all the child nodes
       *
       * @return Sabre_DAV_INode[]
       */
      function getChildren();
  
      /**
       * Checks if a child-node with the specified name exists
       *
       * @param string $name
       * @return bool
       */
      function childExists($name);
  
  }