Files.app multi-profile: add back migration to old path format.

chrome/browser/chromeos/file_manager/path_util.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/file_manager/path_util.h"
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/sys_info.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/login/user.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
+#include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/profiles/profile.h"
 #include "net/base/escape.h"
 
 namespace file_manager {
 namespace util {
 
 namespace {
 
 const char kDownloadsFolderName[] = "Downloads";
 const base::FilePath::CharType kOldDownloadsFolderPath[] =
     FILE_PATH_LITERAL("/home/chronos/user/Downloads");
 const base::FilePath::CharType kOldDriveFolderPath[] =
     FILE_PATH_LITERAL("/special/drive");
-const base::FilePath::CharType kNoHashDriveFolderPath[] =
-    FILE_PATH_LITERAL("/special/drive-");
 
 }  // namespace
 
 base::FilePath GetDownloadsFolderForProfile(Profile* profile) {
   if (!base::SysInfo::IsRunningOnChromeOS() &&
       !chromeos::UserManager::IsMultipleProfilesAllowed()) {
     // On the developer run on Linux desktop build, if multiple profiles are
     // not enabled, use $HOME/Downloads for ease for accessing local files for
     // debugging.
     base::FilePath path;
@@ skipping 13 matching lines @@
   //
   // Old path format comes either from stored old settings or from the initial
   // default value set in DownloadPrefs::RegisterProfilePrefs in profile-unaware
   // code location. In the former case it is "/home/chronos/user/Downloads",
   // and in the latter case it is DownloadPrefs::GetDefaultDownloadDirectory().
   // Those two paths coincides as long as $HOME=/home/chronos/user, but the
   // environment variable is phasing out (crbug.com/333031) so we care both.
 
   const base::FilePath downloads = GetDownloadsFolderForProfile(profile);
   const base::FilePath drive = drive::util::GetDriveMountPointPath(profile);
-  const base::FilePath bases[][2] = {
-    {base::FilePath(kOldDownloadsFolderPath),      downloads},
-    {DownloadPrefs::GetDefaultDownloadDirectory(), downloads},
-    {base::FilePath(kOldDriveFolderPath),          drive},
-    // TODO(kinaba): http://crbug.com/341284 Remove after M34 branching.
-    // For a short period we incorrectly set "/special/drive-" as the Drive path
-    // that needs to be fixed.
-    {base::FilePath(kNoHashDriveFolderPath),       drive},
-  };
 
-  for (size_t i = 0; i < arraysize(bases); ++i) {
-    const base::FilePath& old_base = bases[i][0];
-    const base::FilePath& new_base = bases[i][1];
+  std::vector<std::pair<base::FilePath, base::FilePath> > bases;
+  bases.push_back(std::make_pair(base::FilePath(kOldDownloadsFolderPath),
+                                 downloads));
+  bases.push_back(std::make_pair(DownloadPrefs::GetDefaultDownloadDirectory(),
+                                 downloads));
+  bases.push_back(std::make_pair(base::FilePath(kOldDriveFolderPath), drive));
+
+  // Trying migrating u-<hash>/Downloads to the current download path. This is
+  // no-op when multi-profile is enabled. This is necessary for (1) back
+  // migration when multi-profile flag is enabled and then disabled, or (2) in
+  // some edge cases (crbug.com/356322) that u-<hash> path is temporarily used.
+  if (chromeos::UserManager::IsInitialized()) {
+    const chromeos::User* const user =
+        chromeos::UserManager::Get()->GetUserByProfile(profile);
+    if (user) {
+      const base::FilePath hashed_downloads =
+          chromeos::ProfileHelper::GetProfilePathByUserIdHash(
+              user->username_hash()).AppendASCII(kDownloadsFolderName);
+      bases.push_back(std::make_pair(hashed_downloads, downloads));
+    }
+  }
+
+  for (size_t i = 0; i < bases.size(); ++i) {
+    const base::FilePath& old_base = bases[i].first;
+    const base::FilePath& new_base = bases[i].second;
     base::FilePath relative;
     if (old_path == old_base ||
         old_base.AppendRelativePath(old_path, &relative)) {
       *new_path = new_base.Append(relative);
       return old_path != *new_path;
     }
   }
 
   return false;
 }
 
 std::string GetDownloadsMountPointName(Profile* profile) {
   // To distinguish profiles in multi-profile session, we append user name hash
   // to "Downloads". Note that some profiles (like login or test profiles)
   // are not associated with an user account. In that case, no suffix is added
   // because such a profile never belongs to a multi-profile session.
   chromeos::User* const user =
       chromeos::UserManager::IsInitialized() ?
           chromeos::UserManager::Get()->GetUserByProfile(
               profile->GetOriginalProfile()) : NULL;
   const std::string id = user ? "-" + user->username_hash() : "";
   return net::EscapePath(kDownloadsFolderName + id);
 }
 
 }  // namespace util
 }  // namespace file_manager