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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsIFeedElementBase.idl"

interface nsIURI;
interface nsIWritablePropertyBag2;
interface nsIArray;
interface nsIFeedTextConstruct;

/**
 * A shared base for feeds and items, which are pretty similar,
 * but they have some divergent attributes and require
 * different convenience methods.
 */ 
[scriptable, uuid(577a1b4c-b3d4-4c76-9cf8-753e6606114f)]
interface nsIFeedContainer : nsIFeedElementBase
{
  /**
  * Many feeds contain an ID distinct from their URI, and
  * entries have standard fields for this in all major formats.
  */
  attribute AString id;

  /**
  * The fields found in the document. Common Atom
  * and RSS fields are normalized. This includes some namespaced
  * extensions such as dc:subject and content:encoded. 
  * Consumers can avoid normalization by checking the feed type
  * and accessing specific fields.
  *
  * Common namespaces are accessed using prefixes, like get("dc:subject");.
  * See nsIFeedResult::registerExtensionPrefix.
  */
  attribute nsIWritablePropertyBag2 fields;

  /**
   * Sometimes there's no title, or the title contains markup, so take
   * care in decoding the attribute.
   */
  attribute nsIFeedTextConstruct title;

  /**
  * Returns the primary link for the feed or entry.
  */
  attribute nsIURI link;

  /**
  * Returns all links for a feed or entry.
  */
  attribute nsIArray links;

  /**
  * Returns the categories found in a feed or entry.
  */
  attribute nsIArray categories;

  /**
   * The rights or license associated with a feed or entry.
   */
  attribute nsIFeedTextConstruct rights;

  /**
   * A list of nsIFeedPersons that authored the feed.
   */
  attribute nsIArray authors;

  /**
   * A list of nsIFeedPersons that contributed to the feed.
   */
  attribute nsIArray contributors;

  /**
   * The date the feed was updated, in RFC822 form. Parsable by JS
   * and mail code.
   */
  attribute AString updated;

  /**
  * Syncs a container's fields with its convenience attributes.
  */
  void normalize();
};