/* -*- Mode: C++; tab-width: 2; 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 "nsIMsgFolder.idl"

%{C++
#include "nsTArray.h"
%}

interface nsIMsgWindow;
interface nsINntpIncomingServer;

[ref] native nsMsgKeyArrayRef(nsTArray<nsMsgKey>);

[scriptable, uuid(3bf5c65d-71bd-4560-a337-435797d249a6)]
interface nsIMsgNewsFolder : nsISupports {
  readonly attribute AString unicodeName;
  /**|rawName| is an 8-bit string to represent the name of a newsgroup used by 
   * a news server. It's offered for the convenience of callers so that they 
   * don't have to convert |unicodeName| to the server-side name when 
   * communicating with a news server.  It's US-ASCII except for some 
   * 'stand-alone' Chinese news servers that use GB2312 for newsgroup names 
   * violating RFC 1036. For those servers, it's GB2312. However, it can be any
   * other single and multibyte encoding in principle. The encoding of this 
   * string is stored in |nsINntpIncomingServer| because that's a server-wide
   * property.
   **/
  [noscript] readonly attribute ACString rawName;
  readonly attribute nsINntpIncomingServer nntpServer;
  attribute boolean saveArticleOffline;

  /**
   * @name Authentication methods
   * NNTP authentication is slightly wonky, due to edge cases that are not seen
   * in other protocols. Authentication is not necessary; if authentication is
   * used, it could be configured on a per-group basis or even require only a
   * username and not a password.
   *
   * Since passwords could be per-group, it is necessary to refer to passwords
   * using the methods on this interface and not nsIMsgIncomingServer. Passwords
   * for the server as a whole are found via the root folder. If the server is
   * configured to use single sign-on (the default), asking any group for its
   * password will result in the server's password, otherwise, each group stores
   * its password individually.
   *
   * Due to this setup, most of the password management functions on
   * nsIMsgIncomingServer do not correctly work. The only one that would affect
   * the passwords stored on folders correctly is forgetPassword; using any
   * other on a news server would result in inconsistent state.
   *
   * Before requesting either the username or password for authentication, it is
   * first necessary to call getAuthenticationCredentials. If the method returns
   * true, then groupUsername and groupPassword are appropriately set up for
   * necessary authentication; if not, then authentication must be stopped.
   */
  /// @{

  /**
   * Gets the authentication credentials, returning if the results are valid.
   *
   * If mustPrompt is true, then the user will always be asked for the
   * credentials. Otherwise, if mayPrompt is true, then the user will be asked
   * for credentials if there are no saved credentials. If mayPrompt is false,
   * then no prompt will be shown, even if there are no saved credentials.
   *
   * If this method returns true, then groupUsername and groupPassword will
   * contain non-empty results that could be used for authentication. If this
   * method returns false, then the values of groupUsername and groupPassword
   * will be cleared if they had previously been set. This could happen if
   * mustPrompt were true and the user decided to cancel the authentication
   * prompt.
   *
   * Note that this method will be executed synchronously; if an async prompt
   * is wanted, it is the responsibility of the caller to manage it explicitly
   * with nsIMsgAsyncPrompter.
   */
  bool getAuthenticationCredentials(in nsIMsgWindow aMsgWindow,
    in bool mayPrompt, in bool mustPrompt);

  /**
   * Force migration of credentials from older versions of this codebase.
   *
   * This method is normally called during the creation of newsgroup folders,
   * and it should not be necessary to call this method. This method also
   * forcibly deletes the old credentials, so that passwords would not be
   * leaked.
   *
   * It is expected that this method will be removed once it is decided that
   * supporting migration from old versions of Thunderbird and SeaMonkey should
   * not be supported.
   */
  void migrateLegacyCredentials();

  /// The username that should be used for this group
  attribute ACString groupUsername;

  /// The password that should be used for this group
  attribute ACString groupPassword;

  /// Forgets saved authentication credentials permanently.
  void forgetAuthenticationCredentials();
  /// @}
  
  void moveFolder(in nsIMsgFolder aNewsgroupToMove, in nsIMsgFolder aRefNewsgroup, in PRInt32 aOrientation);

  nsIMsgFolder addNewsgroup(in AUTF8String newsgroupName, in ACString setStr);

  void setReadSetFromStr(in ACString setStr);

  readonly attribute ACString newsrcLine;
  readonly attribute ACString optionLines;
  readonly attribute ACString unsubscribedNewsgroupLines;
  void SetNewsrcHasChanged(in boolean newsrcHasChanged);
  void updateSummaryFromNNTPInfo(in long oldest, in long youngest, in long total);
  void removeMessage(in nsMsgKey key); 
  [noscript] void removeMessages(in nsMsgKeyArrayRef aMsgKeys);
  void cancelComplete();
  void cancelFailed();

  ACString getMessageIdForKey(in nsMsgKey key);

  void getNextNMessages(in nsIMsgWindow aMsgWindow);
  void notifyDownloadedLine(in string line, in nsMsgKey key);
  void notifyFinishedDownloadinghdrs();

  /**
   * Retrieves the database, but does not cache it in mDatabase.
   *
   * This is useful for operations that shouldn't hold open the database.
   */
  nsIMsgDatabase getDatabaseWithoutCache();

  /**
   * Requests that a message be canceled.
   *
   * Note that, before sending the news cancel, this method will check to make
   * sure that the user has proper permission to cancel the message.
   *
   * @param aMsgHdr     The header of the message to be canceled.
   * @param aMsgWindow  The standard message window object, for error dialogs.
   */
  void cancelMessage(in nsIMsgDBHdr aMsgHdr, in nsIMsgWindow aMsgWindow);
};
