/* -*- 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/. */

/**
 * @defgroup msgdb Mailnews message database
 * This module is the access point to locally-stored databases.
 *
 * These databases are stored in .msf files. Each file contains useful cached
 * information, like the message id or references, as well as the cc header or
 * tag information. This cached information is encapsulated in nsIMsgDBHdr.
 *
 * Also included is threading information, mostly encapsulated in nsIMsgThread.
 * The final component is the database folder info, which contains information
 * on the view and basic information also stored in the folder cache such as the
 * name or most recent update.
 *
 * What this module does not do is access individual messages. Access is
 * strictly controlled by the nsIMsgFolder objects and their backends.
 * @{
 */
#include "nsISupports.idl"
#include "nsIDBChangeAnnouncer.idl"

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

interface nsIMutableArray;
interface nsIMsgDatabase;
interface nsIMsgDBView;
interface nsIDBChangeListener;
interface nsIMsgDBHdr;
interface nsISimpleEnumerator;
interface nsIMsgThread;
interface nsIDBFolderInfo;
interface nsIMsgOfflineImapOperation;
interface nsIMsgFolder;
interface nsIMsgKeyArray;
interface nsIFile;
interface nsIArray;

typedef unsigned long nsMsgRetainByPreference;


[scriptable, uuid(0bbe00df-17f8-4e36-8917-40172c3a95fc)]

interface nsIMsgRetentionSettings : nsISupports
{
  const unsigned long nsMsgRetainAll = 1;
  const unsigned long nsMsgRetainByAge = 2;
  const unsigned long nsMsgRetainByNumHeaders = 3;

  attribute boolean useServerDefaults;
  attribute nsMsgRetainByPreference retainByPreference;
  attribute unsigned long daysToKeepHdrs;
  attribute unsigned long numHeadersToKeep; 

  // this is orthogonal to retaining by age or num headers, i.e., if
  // it's set, we'll only keep NNN unread messages only, or unread
  // messages less than NNN days old.
  attribute boolean keepUnreadMessagesOnly;
  // this is for keeping offline bodies.
  attribute boolean cleanupBodiesByDays;
  attribute unsigned long daysToKeepBodies;

  /**
   * Should retention settings be applied to flagged/starred messages?
   * If false, flagged messages are never automatically deleted.
   */
  attribute boolean applyToFlaggedMessages;
};

[scriptable, uuid(86a9da90-14f1-11d5-a5c0-0060b0fc04b7)]
interface nsIMsgDownloadSettings : nsISupports
{
  attribute boolean useServerDefaults;
  attribute boolean downloadByDate;
  attribute boolean downloadUnreadOnly;
  attribute unsigned long ageLimitOfMsgsToDownload;
};

typedef long nsMsgDBCommit;

[scriptable, uuid(15431853-e448-45dc-8978-9958bf74d9b7)]

interface nsMsgDBCommitType 
{
  const long kLargeCommit = 1;
  const long kSessionCommit = 2;
  const long kCompressCommit = 3;
};

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

/**
 * A service to open mail databases and manipulate listeners automatically.
 *
 * The contract ID for this component is
 * <tt>\@mozilla.org/msgDatabase/msgDBService;1</tt>.
 */
[scriptable, uuid(4cbbf024-3760-402d-89f3-6ababafeb07d)]
interface nsIMsgDBService : nsISupports
{
  /**
   * Opens a database for a given folder.
   *
   * This method is preferred over nsIMsgDBService::openMailDBFromFile if the
   * caller has an actual nsIMsgFolder around. If the database detects that it
   * is unreadable or out of date (using nsIMsgDatabase::outOfDate) it will
   * destroy itself and prepare to be rebuilt, unless aLeaveInvalidDB is true.
   *
   * If one gets a NS_MSG_ERROR_FOLDER_SUMMARY_MISSING message, then one
   * should call nsIMsgDBService::createNewDB to create the new database.
   *
   * @param aFolder         The folder whose database should be returned.
   * @param aLeaveInvalidDB Whether or not the database should be deleted if it
   *                        is invalid.
   * @return                A new nsIMsgDatabase object representing the folder
   *                        database that was opened.
   * @exception NS_ERROR_FILE_TARGET_DOES_NOT_EXIST
   *                        The file could not be created.
   * @exception NS_MSG_ERROR_FOLDER_SUMMARY_OUT_OF_DATE
   *                        The database is present (and was opened), but the
   *                        summary file is out of date.
   * @exception NS_MSG_ERROR_FOLDER_SUMMARY_MISSING
   *                        The database is present, but the summary file is
   *                        missing.
   * @see nsIMsgDatabase::Open
   * @see nsIMsgDBService::createNewDB
   */
  nsIMsgDatabase openFolderDB(in nsIMsgFolder aFolder,
                              in boolean aLeaveInvalidDB);

  /**
   * This is the same as a synchronous open in terms of params and errors.
   * But to finish opening the db, the caller must call
   * nsIMsgDBService::OpenMore repeatedly until the open is finished.
   * @see nsIMsgDBService::openFolderDB
   * @see nsIMsgDBService::openMore
   */
  nsIMsgDatabase asyncOpenFolderDB(in nsIMsgFolder aFolder,
                                   in boolean aLeaveInvalidDB);

  /**
   * Continues the open process for a db opened with
   * nsIMsgDBService::asyncOpenFolderDB. Returns true if the db is ready
   * to use, false if openMore needs to be called again.
   * This will throw the same kinds of exceptions as openFolderDB.
   * @param aTimeHint approximate number of milliseconds to spend
   *                  before returning. This is more of a floor than
                      a ceiling, since we can't guarantee that there
                      won't be one big chunk that we can't interrupt.
   * @return true if db is ready to use, false if openMore needs to
   *         be called again.
   * @see nsIMsgDBService::openFolderDB
   */
  boolean openMore(in nsIMsgDatabase aDB, in unsigned long aTimeHint);

  /**
   * Creates a new database for the given folder.
   *
   * If the database already exists, it will return the database, emit a
   * warning, but not fully initialize it. For this reason, it should only be
   * used when it is known that the database does not exist, such as when
   * nsIMsgDBService::openFolderDB throws an error.
   *
   * @see nsIMsgDBService::openFolderDB
   */
  nsIMsgDatabase createNewDB(in nsIMsgFolder aFolder);

  /**
   * Opens or creates a database for a given file.
   *
   * This method should only be used if the caller does not have a folder
   * instance, because the resulting db and message headers retrieved from the
   * database would not know their owning folder, which limits their usefulness.
   * For this reason, one should use nsIMsgDBService::openFolderDB instead
   * except under special circumstances.
   *
   * Unlike nsIMsgDBService::openFolderDB, there is no corresponding method to
   * create a new database if opening the database failed. However, this method
   * will never throw NS_MSG_ERROR_FOLDER_SUMMARY_MISSING, so no corresponding
   * method is needed.
   *
   * @param aFile           The file for which the database should be returned.
   * @param aFolder         Folder the db corresponds to (may be null)
   * @param aCreate         Whether or not the file should be created.
   * @param aLeaveInvalidDB Whether or not the database should be deleted if it
   *                        is invalid.
   * @return                A new nsIMsgDatabase object encapsulating the file
   *                        passed in.
   * @exception NS_ERROR_FILE_TARGET_DOES_NOT_EXIST
   *                        The file could not be created.
   * @see nsIMsgDBService::openFolderDB
   * @see nsIMsgDatabase::Open
   */
  nsIMsgDatabase openMailDBFromFile(in nsIFile aFile,
                                    in nsIMsgFolder aFolder,
                                    in boolean aCreate,
                                    in boolean aLeaveInvalidDB);
  /**
   * Adds the given listener to the listener set for the folder.
   *
   * Since the message database will likely be opened and closed many times, by
   * registering using this method, one will be guaranteed to see all subsequent
   * modifications. This will also add the listener to the database if it is
   * already opened.
   *
   * @param aFolder         The folder to add a listener to.
   * @param aListener       The listener to add the folder to.
   */
  void registerPendingListener(in nsIMsgFolder aFolder,
                               in nsIDBChangeListener aListener);
  /**
   * Removes the listener from all folder listener sets.
   *
   * @param aListener       The listener to remove.
   * @exception NS_ERROR_FAILURE
   *                        The listener is not registered.
   */
  void unregisterPendingListener(in nsIDBChangeListener aListener);

  /**
   * Get the db for a folder, if already open.
   *
   * @param aFolder   The folder to get the cached (open) db for.
   *
   * @returns         null if the db isn't open, otherwise the db.
   */
  nsIMsgDatabase cachedDBForFolder(in nsIMsgFolder aFolder);

  /**
   * Close the db for a folder, if already open.
   *
   * @param aFolder   The folder to close the cached (open) db for.
   */
  void forceFolderDBClosed(in nsIMsgFolder aFolder);

  /// an enumerator to iterate over the open dbs.
  readonly attribute nsIArray openDBs;
};

[scriptable, uuid(2dbc9e31-5f8c-408c-960e-a91cecde368c)]
interface nsIMsgDatabase : nsIDBChangeAnnouncer {
  void Close(in boolean aForceCommit);

  void Commit(in nsMsgDBCommit commitType);
  // Force closed is evil, and we should see if we can do without it.
  // In 4.x, it was mainly used to remove corrupted databases.
  void ForceClosed();
  void clearCachedHdrs();
  void resetHdrCacheSize(in unsigned long size);

  readonly attribute nsIDBFolderInfo  dBFolderInfo;

  /// Folder this db was opened on.
  readonly attribute nsIMsgFolder folder;

  /**
   * This is used when deciding which db's to close to free up memory
   * and other resources in an LRU manner. It doesn't track every operation
   * on every object from the db, but high level things like open, commit,
   * and perhaps some of the list methods. Commit should be a proxy for all
   * the mutation methods.
   *
   * I'm allowing clients to set the last use time as well, so that
   * nsIMsgFolder.msgDatabase can set the last use time.
   */
  attribute PRTime lastUseTime;

  // get a message header for the given key. Caller must release()!

  nsIMsgDBHdr GetMsgHdrForKey(in nsMsgKey key);
  nsIMsgDBHdr getMsgHdrForMessageID(in string messageID);

  /**
   * get a message header for a Gmail message with the given X-GM-MSGID.
   */
  nsIMsgDBHdr GetMsgHdrForGMMsgID(in string aGmailMessageID);
  //Returns whether or not this database contains the given key
  boolean ContainsKey(in nsMsgKey key);

/**
 * Must call AddNewHdrToDB after creating. The idea is that you create
 * a new header, fill in its properties, and then call AddNewHdrToDB.
 * AddNewHdrToDB will send notifications to any listeners.
 *
 * @param aKey msgKey for the new header. If aKey is nsMsgKey_None,
 *             we will auto-assign a new key.
 */
  nsIMsgDBHdr CreateNewHdr(in nsMsgKey aKey);

  void AddNewHdrToDB(in nsIMsgDBHdr newHdr, in boolean notify);

  nsIMsgDBHdr CopyHdrFromExistingHdr(in nsMsgKey key, in nsIMsgDBHdr existingHdr, in boolean addHdrToDB);

  void ListAllKeys(in nsIMsgKeyArray array);

  nsISimpleEnumerator EnumerateMessages();
  nsISimpleEnumerator ReverseEnumerateMessages();
  nsISimpleEnumerator EnumerateThreads();

  /**
   * Get an enumerator for use with nextMatchingHdrs. The enumerator
   * will only return messages that match the passed-in search terms.
   *
   * @param     searchTerms       array of search terms to evaluate.
   * @param     reverse           start at the end, defaults to false.
   *
   * @returns   an enumerator for passing into nextMatchingHdrs
   */
  nsISimpleEnumerator getFilterEnumerator(in nsIArray searchTerms,
                                          [optional] in boolean reverse);

  /**
   * Get the next N matching headers using a filter enumerator
   * obtained by calling getFilterEnumerator.
   *
   * @param     enumerator -      This *must* be a filter enumerator
   * @param     numHdrsToLookAt   if non 0, the number of hdrs to advance the
   *                              enumerator before returning.
   * @param     maxResults        if non 0, the max results to return.
   * @param     matchingHdrs      if non null, array of matching hdrs.
   * @param     numMatches        if non null, the number of matching hdrs.
   *
   * @returns   false, if done, true if more hdrs to look at.
   */
  boolean nextMatchingHdrs(in nsISimpleEnumerator enumerator,
                           in long numHdrsToLookAt,
                           in long maxResults,
                           in nsIMutableArray matchingHdrs,
                           out long numMatches);


  // count the total and unread msgs, and adjust global count if needed
  void syncCounts();

  nsIMsgThread GetThreadContainingMsgHdr(in nsIMsgDBHdr msgHdr) ;

  // helpers for user command functions like delete, mark read, etc.

  void MarkHdrRead(in nsIMsgDBHdr msgHdr, in boolean bRead,
                         in nsIDBChangeListener instigator);

  void MarkHdrReplied(in nsIMsgDBHdr msgHdr, in boolean bReplied,
                         in nsIDBChangeListener instigator);

  void MarkHdrMarked(in nsIMsgDBHdr msgHdr, in boolean mark,
                         in nsIDBChangeListener instigator);
  /**
   * Remove the new status from a message.
   *
   * @param aMsgHdr        The database reference header for the message
   * @param aInstigator    Reference to original calling object
   */
  void MarkHdrNotNew(in nsIMsgDBHdr aMsgHdr,
                     in nsIDBChangeListener aInstigator);

  // MDN support
  void MarkMDNNeeded(in nsMsgKey key, in boolean bNeeded,
                           in nsIDBChangeListener instigator);

  // MarkMDNneeded only used when mail server is a POP3 server
  // or when the IMAP server does not support user defined
  // PERMANENTFLAGS
  boolean IsMDNNeeded(in nsMsgKey key);

  void MarkMDNSent(in nsMsgKey key, in boolean bNeeded,
                         in nsIDBChangeListener instigator);
  boolean IsMDNSent(in nsMsgKey key);

// methods to get and set docsets for ids.
  void MarkRead(in nsMsgKey key, in boolean bRead, 
                      in nsIDBChangeListener instigator);

  void MarkReplied(in nsMsgKey key, in boolean bReplied, 
                         in nsIDBChangeListener instigator);

  void MarkForwarded(in nsMsgKey key, in boolean bForwarded, 
                           in nsIDBChangeListener instigator);

  void MarkHasAttachments(in nsMsgKey key, in boolean bHasAttachments, 
                                in nsIDBChangeListener instigator);

  void MarkThreadRead(in nsIMsgThread thread, in nsIDBChangeListener instigator,
                      out unsigned long aCount,
                      [array, size_is(aCount)] out nsMsgKey aKeys);

  /// Mark the specified thread ignored.
  void MarkThreadIgnored(in nsIMsgThread thread, in nsMsgKey threadKey,
                         in boolean bIgnored,
                         in nsIDBChangeListener instigator);

  /// Mark the specified thread watched.
  void MarkThreadWatched(in nsIMsgThread thread, in nsMsgKey threadKey,
                         in boolean bWatched,
                         in nsIDBChangeListener instigator);

  /// Mark the specified subthread ignored.
  void MarkHeaderKilled(in nsIMsgDBHdr msg, in boolean bIgnored,
                        in nsIDBChangeListener instigator);

  /// Is the message read.
  boolean IsRead(in nsMsgKey key);
  /// Is the message part of an ignored thread.
  boolean IsIgnored(in nsMsgKey key);
  /// Is the message part of a watched thread.
  boolean IsWatched(in nsMsgKey key);
  /// Is the message flagged/starred.
  boolean IsMarked(in nsMsgKey key);
  /// Does the message have attachments.
  boolean HasAttachments(in nsMsgKey key);

  void MarkAllRead(out unsigned long aCount,
                   [array, size_is(aCount)] out nsMsgKey aKeys);

  void deleteMessages(in unsigned long aNumKeys,
                      [array, size_is(aNumKeys)] in nsMsgKey nsMsgKeys,
                      in nsIDBChangeListener instigator);
  void DeleteMessage(in nsMsgKey key, 
                           in nsIDBChangeListener instigator,
                           in boolean commit);
  void DeleteHeader(in nsIMsgDBHdr msgHdr, in nsIDBChangeListener instigator,
                          in boolean commit, in boolean notify);

  // lower level routine that doesn't remove hdr from thread or adjust counts
  void RemoveHeaderMdbRow(in nsIMsgDBHdr msgHdr);

  void UndoDelete(in nsIMsgDBHdr msgHdr);

  void MarkMarked(in nsMsgKey key, in boolean mark,
                        in nsIDBChangeListener instigator);
  void MarkOffline(in nsMsgKey key, in boolean offline,
                         in nsIDBChangeListener instigator);
  void SetLabel(in nsMsgKey key, in nsMsgLabelValue label);
  void setStringProperty(in nsMsgKey aKey, in string aProperty, in string aValue);
  /**
   * Set the value of a string property in a message header
   *
   * @param msgHdr    Header of the message whose property will be changed
   * @param aProperty the property to change
   * @param aValue    new value for the property
   */
  void setStringPropertyByHdr(in nsIMsgDBHdr msgHdr, in string aProperty, in string aValue);

  /**
   * Set the value of a uint32 property in a message header.
   *
   * @param aMsgHdr   header of the message whose property will be changed
   * @param aProperty the property to change
   * @param aValue    new value for the property
   */
  void setUint32PropertyByHdr(in nsIMsgDBHdr aMsgHdr,
                              in string aProperty, in unsigned long aValue);

  void MarkImapDeleted(in nsMsgKey key, in boolean deleted,
                             in nsIDBChangeListener instigator);

  readonly attribute nsMsgKey FirstNew;

  attribute nsIMsgRetentionSettings msgRetentionSettings;
  // purge unwanted message headers and/or bodies. If deleteViaFolder is
  // true, we'll call nsIMsgFolder::DeleteMessages to delete the messages.
  // Otherwise, we'll just delete them from the db.
  void applyRetentionSettings(in nsIMsgRetentionSettings aMsgRetentionSettings, 
                              in boolean aDeleteViaFolder);

  attribute nsIMsgDownloadSettings msgDownloadSettings;

  boolean HasNew();
  void ClearNewList(in boolean notify);
  void AddToNewList(in nsMsgKey key);

  // used mainly to force the timestamp of a local mail folder db to
  // match the time stamp of the corresponding berkeley mail folder,
  // but also useful to tell the summary to mark itself invalid
  // Also, if a local folder is being reparsed, summary will be invalid
  // until the reparsing is done.
  attribute boolean summaryValid;

  // batching - can be used to cache file stream for local mail,
  // and perhaps to use the mdb batching mechanism as well.
  void StartBatch();
  void EndBatch();
  // offline operations - we could move these into an offline operation interface
  // but it would have to be in nsMailDatabase, since local folders can be move destinations
  nsIMsgOfflineImapOperation GetOfflineOpForKey(in nsMsgKey messageKey, in boolean create);
  void  RemoveOfflineOp(in nsIMsgOfflineImapOperation op);
  nsISimpleEnumerator EnumerateOfflineOps();
  [noscript] void ListAllOfflineOpIds(in nsMsgKeyArrayPtr offlineOpIds);
  [noscript] void ListAllOfflineDeletes(in nsMsgKeyArrayPtr offlineDeletes);
  void ListAllOfflineMsgs(in nsIMsgKeyArray aKeys);

  void setAttributeOnPendingHdr(in nsIMsgDBHdr pendingHdr, in string property,
                                  in string propertyVal);

  void setUint32AttributeOnPendingHdr(in nsIMsgDBHdr pendingHdr, in string property,
                                  in unsigned long propertyVal);

  /**
   * Sets a pending 64 bit attribute, which tells the DB that when a message
   * which looks like the pendingHdr (e.g., same message-id) is added to the
   * db, set the passed in property and value on the new header. This is
   * usually because we've copied an imap message to a different folder, and
   * want to carry forward attributes from the original message to the copy,
   * but don't have the message hdr for the copy yet so we can't set
   * attributes directly.
   *
   * @param aPendingHdr usually the source of the copy.
   * @param aProperty name of property to set.
   * @param aPropertyVal 64 bit value of property to set.
   */
  void setUint64AttributeOnPendingHdr(in nsIMsgDBHdr aPendingHdr,
                                      in string aProperty,
                                      in unsigned long long aPropertyVal);

  /**
   * Given a message header with its message-id set, update any pending
   *  attributes on the header.
   *
   * @param aNewHdr a new header that may have pending attributes.
   */
  void updatePendingAttributes(in nsIMsgDBHdr aNewHdr);

  readonly attribute nsMsgKey lowWaterArticleNum;
  readonly attribute nsMsgKey highWaterArticleNum;
  attribute nsMsgKey nextPseudoMsgKey;   //for undo-redo of move pop->imap
  readonly attribute nsMsgKey nextFakeOfflineMsgKey; // for saving "fake" offline msg hdrs
  // for sorting
  void createCollationKey(in AString sourceString, out unsigned long aCount,
                          [array, size_is(aCount)] out octet aKey);
  long compareCollationKeys(in unsigned long aLen1,
                            [array, size_is(aLen1)] in octet key1,
                            in unsigned long aLen2,
                            [array, size_is(aLen2)] in octet key2);

  // when creating a view, the default sort order and view flags 
  // use these for the default.  (this allows news to override, so that
  // news can be threaded by default)
  readonly attribute nsMsgViewFlagsTypeValue defaultViewFlags;
  readonly attribute nsMsgViewSortTypeValue  defaultSortType;
  readonly attribute nsMsgViewSortOrderValue defaultSortOrder;

  // for msg hdr hash table allocation. controllable by caller to improve folder loading preformance.
  attribute unsigned long msgHdrCacheSize;

  /**
   * The list of messages currently in the NEW state.
   * 
   * If there are no such messages, a null pointer may be returned.
   * the caller should free when done using nsMemory::Free.
   */
  void getNewList(out unsigned long count, [array, size_is(count)] out nsMsgKey newKeys);
  
  // These are used for caching search hits in a db, to speed up saved search folders.
  nsISimpleEnumerator getCachedHits(in string aSearchFolderUri);
  void refreshCache(in string aSearchFolderUri, in unsigned long aNumKeys, [array, size_is (aNumKeys)] in nsMsgKey aNewHits,
     out unsigned long aNumBadHits, [array, size_is(aNumBadHits)] out nsMsgKey aStaleHits);
  void updateHdrInCache(in string aSearchFolderUri, in nsIMsgDBHdr aHdr, in boolean aAdd);
  boolean hdrIsInCache(in string aSearchFolderUri, in nsIMsgDBHdr aHdr);

};
/** @} */
