Implementing app command to query EULA acceptance state for Chrome.

chrome/installer/util/eula_util.cc

+// Copyright (c) 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/installer/util/eula_util.h"
+
+#include "base/file_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/common/chrome_constants.h"
+#include "chrome/installer/util/browser_distribution.h"
+#include "chrome/installer/util/install_util.h"
+#include "chrome/installer/util/installation_state.h"
+#include "chrome/installer/util/master_preferences.h"
+#include "chrome/installer/util/master_preferences_constants.h"
+#include "chrome/installer/util/util_constants.h"
+
+namespace installer {
+
+namespace {
+
+bool IsChromeFirstRunPending(BrowserDistribution* dist) {
+  // Chrome creates a sentinel file after first run, and we look for it.

[grt (UTC plus 2), 2013/01/24 21:04:55]

  // Chrome creates the first run sentinel after the user has gone through the
  // first-run flow. Assume Chrome has been run if the path to the sentinel
  // cannot be determined.

[huangs, 2013/01/25 01:13:23]

Done.

+  // However, if we fail to get the sentinel path, assume Chrome has been run.
+  FilePath first_run_sentinel;
+  return InstallUtil::GetSentinelFilePath(chrome::kFirstRunSentinel,
+                                          dist,
+                                          &first_run_sentinel)
+      && !file_util::PathExists(first_run_sentinel);
+}
+
+bool IsEULAAcceptanceFlagged(BrowserDistribution* dist) {
+  // Chrome creates a sentinel after the Eula is accepted.

[grt (UTC plus 2), 2013/01/24 21:04:55]

  // Chrome creates the EULA sentinel after the EULA has been accepted when
  // doing so is required by master_preferences. Assume the EULA has not been
  // accepted if the path to the sentinel cannot be determined.

[huangs, 2013/01/25 01:13:23]

Done.

+  // But if we fail to get sentinel path, assume EULA not accepted.
+  FilePath eula_sentinel;
+  return InstallUtil::GetSentinelFilePath(kEULASentinelFile,
+                                          dist,
+                                          &eula_sentinel)
+      && file_util::PathExists(eula_sentinel);
+}
+
+scoped_ptr<MasterPreferences> GetMasterPrefs(const ProductState& prod_state) {
+  // The standard location of the master prefs is next to the chrome binary.
+  FilePath master_prefs_path(
+      prod_state.GetSetupPath().DirName().DirName().DirName());
+  scoped_ptr<MasterPreferences> install_prefs(new MasterPreferences(
+      master_prefs_path.AppendASCII(kDefaultMasterPrefs)));
+  if (install_prefs && install_prefs->read_from_file())
+    return install_prefs.Pass();
+
+  return scoped_ptr<MasterPreferences>();
+}
+
+}  // namespace
+
+EULAAcceptanceResponse IsEULAAccepted() {
+  ProductState prod_state;
+
+  // If user-level products exist, then EULA has been accepted.

[grt (UTC plus 2), 2013/01/24 21:04:55]

Are you sure it's is safe to consider the eula to have been accepted if any
multi-install product is installed at user-level? This is true for Chrome and
Chrome Frame, but I'm not sure it'll always be true for all products.

[huangs, 2013/01/25 01:13:23]

Changing interface to get "bool system_level" parameter.
For the user-level case, I'll be conservative, and explicitly look for Chrome
and App Launcher only.

+  if (prod_state.Initialize(false, BrowserDistribution::CHROME_BINARIES)
+      || prod_state.Initialize(false, BrowserDistribution::CHROME_BROWSER)) {
+    return EULA_YES;
+  }
+
+  // Try to use system-level Chrome binaries product state first.

[erikwright (departed), 2013/01/24 20:27:40]

nit 'first' now seems out of place. Probably OK to just remove it and leave the
rest.

[huangs, 2013/01/25 01:13:23]

Removed.

+  if (!prod_state.Initialize(true, BrowserDistribution::CHROME_BINARIES)) {
+    // Fall back to using system-level Chrome product state.
+    if (!prod_state.Initialize(true, BrowserDistribution::CHROME_BROWSER))
+      return EULA_FAIL;
+
+    LOG_IF(DFATAL, prod_state.is_multi_install())
+        << "Binaries are not installed, but Chrome is multi-install.";
+  }
+
+  BrowserDistribution* dist = BrowserDistribution::GetSpecificDistribution(
+      BrowserDistribution::CHROME_BROWSER);
+
+  // Is Google Update waiting for Chrome's EULA to be accepted?
+  DWORD eula_accepted = 0;
+  if (prod_state.GetEulaAccepted(&eula_accepted) && !eula_accepted)
+    return EULA_NO;
+
+  if (!IsChromeFirstRunPending(dist) || IsEULAAcceptanceFlagged(dist))
+    return EULA_YES;
+
+  // EULA acceptance not flagged. Now see if it is required.
+  scoped_ptr<MasterPreferences> install_prefs(GetMasterPrefs(prod_state));
+  // If we fail to get master preferences, assume EULA is not accepted.
+  if (!install_prefs)
+    return EULA_NO;
+
+  bool eula_required = false;
+  // If kRequireEula value is absent, assume EULA is not required.
+  if (!install_prefs->GetBool(master_preferences::kRequireEula, &eula_required))
+    return EULA_YES;
+
+  return eula_required ? EULA_NO : EULA_YES;
+}
+
+}  // namespace installer