Refactoring master preference parsing code into installer util so

it can be shared by first run and set up. There is no functionality
change in this CL.

Review URL: http://codereview.chromium.org/9338

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@4688 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 150 insertions, 0 deletions

diff --git a/chrome/installer/util/master_preferences.cc b/chrome/installer/util/master_preferences.cc
new file mode 100644
index 0000000..6b4102d
--- /dev/null
+++ b/chrome/installer/util/master_preferences.cc
@@ -0,0 +1,67 @@
+// Copyright (c) 2006-2008 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 "base/file_util.h"
+#include "base/logging.h"
+#include "chrome/common/json_value_serializer.h"
+#include "chrome/installer/util/master_preferences.h"
+
+namespace {
+
+DictionaryValue* ReadJSONPrefs(const std::string& data) {
+  JSONStringValueSerializer json(data);
+  Value* root;
+  if (!json.Deserialize(&root))
+    return NULL;
+  if (!root->IsType(Value::TYPE_DICTIONARY)) {
+    delete root;
+    return NULL;
+  }
+  return static_cast<DictionaryValue*>(root);
+}
+
+bool GetBooleanPref(const DictionaryValue* prefs, const std::wstring& name) {
+  bool value = false;
+  prefs->GetBoolean(name, &value);
+  return value;
+}
+
+}  // namespace
+
+namespace installer_util {
+
+int ParseDistributionPreferences(const std::wstring& master_prefs_path) {
+
+  if (!file_util::PathExists(master_prefs_path))
+    return MASTER_PROFILE_NOT_FOUND;
+
+  LOG(INFO) << "master profile found";
+
+  std::string json_data;
+  if (!file_util::ReadFileToString(master_prefs_path, &json_data))
+    return MASTER_PROFILE_ERROR;
+
+  scoped_ptr<DictionaryValue> json_root(ReadJSONPrefs(json_data));
+  if (!json_root.get())
+    return MASTER_PROFILE_ERROR;
+
+  int parse_result = 0;
+
+  if (GetBooleanPref(json_root.get(), kDistroSkipFirstRunPref))
+    parse_result |= MASTER_PROFILE_NO_FIRST_RUN_UI;
+
+  if (GetBooleanPref(json_root.get(), kDistroShowWelcomePage))
+    parse_result |= MASTER_PROFILE_SHOW_WELCOME;
+
+  if (GetBooleanPref(json_root.get(), kDistroImportSearchPref))
+    parse_result |= MASTER_PROFILE_IMPORT_SEARCH_ENGINE;
+
+  if (GetBooleanPref(json_root.get(), kDistroImportHistoryPref))
+    parse_result |= MASTER_PROFILE_IMPORT_HISTORY;
+
+  return parse_result;
+}
+
+}  // installer_util
diff --git a/chrome/installer/util/master_preferences.h b/chrome/installer/util/master_preferences.h
new file mode 100644
index 0000000..d7004cc
--- /dev/null
+++ b/chrome/installer/util/master_preferences.h
@@ -0,0 +1,75 @@
+// Copyright (c) 2006-2008 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.
+//
+// This file contains functions processing master preference file used by
+// setup and first run.
+
+#ifndef CHROME_INSTALLER_UTIL_MASTER_PREFERENCES_H__
+#define CHROME_INSTALLER_UTIL_MASTER_PREFERENCES_H__
+
+#include <string>
+
+namespace installer_util {
+
+// This is the default name for the master preferences file used to pre-set
+// values in the user profile at first run.
+const wchar_t kDefaultMasterPrefs[] = L"master_preferences";
+
+// Boolean pref that triggers skipping the first run dialogs.
+const wchar_t kDistroSkipFirstRunPref[] = L"distribution.skip_first_run_ui";
+// Boolean pref that triggers loading the welcome page.
+const wchar_t kDistroShowWelcomePage[] = L"distribution.show_welcome_page";
+// Boolean pref that triggers silent import of the default search engine.
+const wchar_t kDistroImportSearchPref[] = L"distribution.import_search_engine";
+// Boolean pref that triggers silent import of the browse history.
+const wchar_t kDistroImportHistoryPref[] = L"distribution.import_history";
+
+// These are the possible results of calling ParseDistributionPreferences.
+// Some of the results can be combined, so they are bit flags.
+enum MasterPrefResult {
+  MASTER_PROFILE_NOT_FOUND            = 0x1,
+  // A critical error processing the master profile.
+  MASTER_PROFILE_ERROR                = 0x1 << 1,
+  // Skip first run dialogs.
+  MASTER_PROFILE_NO_FIRST_RUN_UI      = 0x1 << 2,
+  // Show welcome page.
+  MASTER_PROFILE_SHOW_WELCOME         = 0x1 << 3,
+  // Improt search engine setting from the default browser.
+  MASTER_PROFILE_IMPORT_SEARCH_ENGINE = 0x1 << 4,
+  // Improt history from the default browser.
+  MASTER_PROFILE_IMPORT_HISTORY       = 0x1 << 5,
+};
+
+// The master preferences is a JSON file with the same entries as the
+// 'Default\Preferences' file. This function parses the distribution
+// section of the preferences file.
+//
+// A prototypical 'master_preferences' file looks like this:
+//
+// {
+//   "distribution": {
+//      "skip_first_run_ui": true,
+//      "show_welcome_page": true,
+//      "import_search_engine": true,
+//      "import_history": false
+//   },
+//   "browser": {
+//      "show_home_button": true
+//   },
+//   "bookmark_bar": {
+//      "show_on_all_tabs": true
+//   },
+//   "homepage": "http://example.org",
+//   "homepage_is_newtabpage": false
+// }
+//
+// A reserved "distribution" entry in the file is used to group related
+// installation properties. This entry will be ignored at other times.
+// This function parses the 'distribution' entry and returns a combination
+// of MasterPrefResult.
+int ParseDistributionPreferences(const std::wstring& master_prefs_path);
+
+}
+
+#endif  // CHROME_INSTALLER_UTIL_MASTER_PREFERENCES_H__
diff --git a/chrome/installer/util/util.vcproj b/chrome/installer/util/util.vcproj
index c57ff78..284eb6a 100644
--- a/chrome/installer/util/util.vcproj
+++ b/chrome/installer/util/util.vcproj
@@ -145,6 +145,14 @@
 			>
 		</File>
 		<File
+			RelativePath=".\master_preferences.cc"
+			>
+		</File>
+		<File
+			RelativePath=".\master_preferences.h"
+			>
+		</File>
+		<File
 			RelativePath="set_reg_value_work_item.cc"
 			>
 		</File>