/* -*- Mode: IDL; tab-width: 4; 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 "nsISupports.idl"
#include "nsIURL.idl"

interface nsIFile;
interface nsIUrlListener;
interface nsIMsgStatusFeedback;
interface nsIMsgIncomingServer;
interface nsIMsgWindow;
interface nsILoadGroup;
interface nsIMsgSearchSession;
interface nsICacheEntryDescriptor;
interface nsICacheSession;
interface nsIMimeHeaders;
interface nsIStreamListener;
interface nsIMsgFolder;
interface nsIMsgHeaderSink;
interface nsIMsgDBHdr;

[scriptable, uuid(995455ba-5bb4-4643-8d70-2b877a2e1320)]
interface nsIMsgMailNewsUrl : nsIURL {
  ///////////////////////////////////////////////////////////////////////////////
  // Eventually we'd like to push this type of functionality up into nsIURI.
  // The idea is to allow the "application" (the part of the code which wants to 
  // run a url in order to perform some action) to register itself as a listener
  // on url. As a url listener, the app will be informed when the url begins to run
  // and when the url is finished. 
  ////////////////////////////////////////////////////////////////////////////////
  void RegisterListener (in nsIUrlListener aUrlListener);
  void UnRegisterListener (in nsIUrlListener aUrlListener);

  readonly attribute nsIURI baseURI;

  // if you really want to know what the current state of the url is (running or not
  // running) you should look into becoming a urlListener...
  void SetUrlState(in boolean runningUrl, in nsresult aStatusCode);
  void GetUrlState(out boolean runningUrl);

  readonly attribute nsIMsgIncomingServer server;

  /**
   * The folder associated with this url.
   * 
   * @exception NS_ERROR_FAILURE    May be thrown if the url does not
   *                                relate to a folder, e.g. standalone
   *                                .eml messages.
   */
  attribute nsIMsgFolder folder;

  attribute nsIMsgStatusFeedback statusFeedback;

  /**
   * The maximum progress for this URL. This might be a count, or it might
   * be a number of bytes. A value of -1 indicates that this is unknown.
   */
  attribute long long maxProgress;

  attribute nsIMsgWindow msgWindow;

  // current mime headers if reading message
  attribute nsIMimeHeaders mimeHeaders;

  // the load group is computed from the msgWindow
  readonly attribute nsILoadGroup loadGroup;

  // search session, if we're running a search.
  attribute nsIMsgSearchSession searchSession;
  attribute boolean updatingFolder;
  attribute boolean addToMemoryCache; 
  attribute boolean msgIsInLocalCache;
  attribute boolean suppressErrorMsgs; // used to avoid displaying biff error messages

  attribute nsICacheEntryDescriptor memCacheEntry;
  // if we want mime to cache images fetched by this message, set this cache session.
  attribute nsICacheSession imageCacheSession; 
  // hold onto this cache entry until url goes away. This is used by mime to keep
  // images cached until the url is deleted so we don't get entries evicted
  // before we've used them. We need to be sure this doesn't introduce
  // circular references or the url will never get freed.
  void cacheCacheEntry(in nsICacheEntryDescriptor cacheEntry);
  void removeCacheEntry(in nsICacheEntryDescriptor cacheEntry);
  const unsigned long eCopy     = 0;
  const unsigned long eMove     = 1;
  const unsigned long eDisplay  = 2;
  boolean IsUrlType(in unsigned long type);
  nsIStreamListener getSaveAsListener(in boolean addDummyEnvelope, in nsIFile aFile);

  // typically the header sink is tied to the nsIMsgWindow, but in certain circumstances, a consumer
  // may chose to provide its own header sink for this url
  attribute nsIMsgHeaderSink msgHeaderSink;

  /// Returns true if the URI is for a message (e.g., imap-message://)
  readonly attribute boolean isMessageUri;
};

//////////////////////////////////////////////////////////////////////////////////
// This is a very small interface which I'm grouping with the mailnewsUrl interface.
// Several url types (mailbox, imap, nntp) have similar properties because they can
// represent mail messages. For instance, these urls can be have URI 
// equivalents which represent a message. 
// We want to provide the app the ability to get the URI for the 
// url. This URI to URL mapping doesn't exist for all mailnews urls...hence I'm
// grouping it into a separate interface...
//////////////////////////////////////////////////////////////////////////////////

[scriptable, uuid(388a37ec-2e1a-4a4f-9d8b-189bedf1bda2)]
interface nsIMsgMessageUrl : nsISupports {
  // get and set the RDF URI associated with the url. Note, not all urls have
  // had uri's set on them so be prepared to handle cases where this string is empty.
  attribute string uri;
  // used by imap, pop and nntp in order to implement save message to disk
  attribute nsIFile messageFile;
  attribute boolean AddDummyEnvelope;  
  attribute boolean canonicalLineEnding;
  attribute string originalSpec;
  
  /**
   *  A message db header for that message.
   *  
   *  @note This attribute is not guaranteed to be set, so callers that
   *  actually require an nsIMsgDBHdr will need to use the uri attribute
   *  on this interface to get the  appropriate nsIMsgMessageService and
   *  then get the header from there.
   */
  attribute nsIMsgDBHdr messageHeader;
};

//////////////////////////////////////////////////////////////////////////////////
// This is a very small interface which I'm grouping with the mailnewsUrl interface.
// I want to isolate out all the I18N specific information that may be associated with
// any given mailnews url. This gives I18N their own "sandbox" of routines they can add
// and tweak as they see fit. For now it contains mostly charset information.
//////////////////////////////////////////////////////////////////////////////////

[scriptable, uuid(D71E0785-2862-11d4-98C1-001083010E9B)]
interface nsIMsgI18NUrl : nsISupports {

  /**
   * the charset associated with a folder for this url.
   * 
   * @exception NS_ERROR_FAILURE    May be thrown if the url does not
   *                                relate to a folder, e.g. standalone
   *                                .eml messages.
   */
  readonly attribute string folderCharset;
  readonly attribute boolean folderCharsetOverride;
  // the charsetOverRide is a charset the user may have specified via the menu for
  // a particular message
  attribute string charsetOverRide;
};