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diff --git a/comm/mailnews/news/src/nsNewsDownloader.h b/comm/mailnews/news/src/nsNewsDownloader.h
new file mode 100644
index 0000000000..c1e68eb77d
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+++ b/comm/mailnews/news/src/nsNewsDownloader.h
@@ -0,0 +1,136 @@
+/* -*- Mode: C++; 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/. */
+
+#ifndef _nsNewsDownloader_H_
+#define _nsNewsDownloader_H_
+
+#include "nsIMsgDatabase.h"
+#include "nsIUrlListener.h"
+#include "nsIMsgFolder.h"
+#include "nsIMsgHdr.h"
+#include "nsIMsgWindow.h"
+#include "nsIMsgSearchNotify.h"
+#include "nsIMsgSearchSession.h"
+#include "nsIMsgStatusFeedback.h"
+#include "nsTArray.h"
+
+// base class for downloading articles in a single newsgroup. Keys to download
+// are passed in to DownloadArticles method.
+class nsNewsDownloader : public nsIUrlListener, public nsIMsgSearchNotify {
+ public:
+  nsNewsDownloader(nsIMsgWindow* window, nsIMsgDatabase* db,
+                   nsIUrlListener* listener);
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIURLLISTENER
+  NS_DECL_NSIMSGSEARCHNOTIFY
+
+  virtual nsresult DownloadArticles(nsIMsgWindow* window, nsIMsgFolder* folder,
+                                    nsTArray<nsMsgKey>* pKeyArray);
+
+  bool ShouldAbort() const { return m_abort; }
+
+ protected:
+  virtual ~nsNewsDownloader();
+
+  virtual int32_t Write(const char* /*block*/, int32_t length) {
+    return length;
+  }
+  virtual void Abort();
+  virtual void Complete();
+  virtual bool GetNextHdrToRetrieve();
+  virtual nsresult DownloadNext(bool firstTimeP);
+  virtual int32_t FinishDownload() { return 0; }
+  virtual int32_t StartDownload() { return 0; }
+  virtual nsresult ShowProgress(const char16_t* progressString,
+                                int32_t percent);
+
+  nsTArray<nsMsgKey> m_keysToDownload;
+  nsCOMPtr<nsIMsgFolder> m_folder;
+  nsCOMPtr<nsIMsgDatabase> m_newsDB;
+  nsCOMPtr<nsIUrlListener> m_listener;
+  bool m_downloadFromKeys;
+  bool m_existedP;
+  bool m_wroteAnyP;
+  bool m_summaryValidP;
+  bool m_abort;
+  int32_t m_numwrote;
+  nsMsgKey m_keyToDownload;
+  nsCOMPtr<nsIMsgWindow> m_window;
+  nsCOMPtr<nsIMsgStatusFeedback> m_statusFeedback;
+  nsCOMPtr<nsIMsgSearchSession> m_searchSession;
+  int32_t m_lastPercent;
+  int64_t m_lastProgressTime;
+  nsresult m_status;
+};
+
+// class for downloading articles in a single newsgroup to the offline store.
+class DownloadNewsArticlesToOfflineStore : public nsNewsDownloader {
+ public:
+  DownloadNewsArticlesToOfflineStore(nsIMsgWindow* window, nsIMsgDatabase* db,
+                                     nsIUrlListener* listener);
+  virtual ~DownloadNewsArticlesToOfflineStore();
+
+  NS_IMETHOD OnStartRunningUrl(nsIURI* url);
+  NS_IMETHOD OnStopRunningUrl(nsIURI* url, nsresult exitCode);
+
+ protected:
+  virtual int32_t StartDownload();
+  virtual int32_t FinishDownload();
+  virtual bool GetNextHdrToRetrieve();
+
+  nsCOMPtr<nsIMsgEnumerator> m_headerEnumerator;
+  nsCOMPtr<nsIMsgDBHdr> m_newsHeader;
+};
+
+// class for downloading all the articles that match the passed in search
+// criteria for a single newsgroup.
+class DownloadMatchingNewsArticlesToNewsDB
+    : public DownloadNewsArticlesToOfflineStore {
+ public:
+  DownloadMatchingNewsArticlesToNewsDB(nsIMsgWindow* window,
+                                       nsIMsgFolder* folder,
+                                       nsIMsgDatabase* newsDB,
+                                       nsIUrlListener* listener);
+  virtual ~DownloadMatchingNewsArticlesToNewsDB();
+  nsresult RunSearch(nsIMsgFolder* folder, nsIMsgDatabase* newsDB,
+                     nsIMsgSearchSession* searchSession);
+
+ protected:
+};
+
+// this class iterates all the news servers for each group on the server that's
+// configured for offline use, downloads the messages that meet the download
+// criteria for that newsgroup/server
+class nsMsgDownloadAllNewsgroups : public nsIUrlListener {
+ public:
+  nsMsgDownloadAllNewsgroups(nsIMsgWindow* window, nsIUrlListener* listener);
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIURLLISTENER
+
+  nsresult ProcessNextGroup();
+
+ protected:
+  virtual ~nsMsgDownloadAllNewsgroups();
+
+  bool AdvanceToNextServer();
+  bool AdvanceToNextGroup();
+  nsresult DownloadMsgsForCurrentGroup();
+
+  RefPtr<DownloadMatchingNewsArticlesToNewsDB> m_downloaderForGroup;
+
+  nsCOMPtr<nsIMsgFolder> m_currentFolder;
+  nsCOMPtr<nsIMsgWindow> m_window;
+  nsTArray<RefPtr<nsIMsgIncomingServer>> m_allServers;
+  nsCOMPtr<nsIMsgIncomingServer> m_currentServer;
+  // Folders still to process for the current server.
+  nsTArray<RefPtr<nsIMsgFolder>> m_folderQueue;
+  nsCOMPtr<nsIUrlListener> m_listener;
+
+  bool m_downloadedHdrsForCurGroup;
+};
+
+#endif