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// 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/installer/util/uninstall_metrics.h"
#include <string>
#include "base/files/file_path.h"
#include "base/json/json_file_value_serializer.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/common/pref_names.h"
#include "chrome/installer/util/util_constants.h"
namespace installer {
namespace {
// Given a DictionaryValue containing a set of uninstall metrics,
// this builds a URL parameter list of all the contained metrics.
// Returns true if at least one uninstall metric was found in
// uninstall_metrics_dict, false otherwise.
bool BuildUninstallMetricsString(
const base::DictionaryValue* uninstall_metrics_dict,
base::string16* metrics) {
DCHECK(NULL != metrics);
bool has_values = false;
for (base::DictionaryValue::Iterator iter(*uninstall_metrics_dict);
!iter.IsAtEnd();
iter.Advance()) {
has_values = true;
metrics->append(L"&");
metrics->append(base::UTF8ToWide(iter.key()));
metrics->append(L"=");
std::string value;
iter.value().GetAsString(&value);
metrics->append(base::UTF8ToWide(value));
}
return has_values;
}
} // namespace
bool ExtractUninstallMetrics(const base::DictionaryValue& root,
base::string16* uninstall_metrics_string) {
// Make sure that the user wants us reporting metrics. If not, don't
// add our uninstall metrics.
bool metrics_reporting_enabled = false;
if (!root.GetBoolean(metrics::prefs::kMetricsReportingEnabled,
&metrics_reporting_enabled) ||
!metrics_reporting_enabled) {
return false;
}
const base::DictionaryValue* uninstall_metrics_dict = NULL;
if (!root.HasKey(installer::kUninstallMetricsName) ||
!root.GetDictionary(installer::kUninstallMetricsName,
&uninstall_metrics_dict)) {
return false;
}
if (!BuildUninstallMetricsString(uninstall_metrics_dict,
uninstall_metrics_string)) {
return false;
}
return true;
}
bool ExtractUninstallMetricsFromFile(const base::FilePath& file_path,
base::string16* uninstall_metrics_string) {
JSONFileValueDeserializer json_deserializer(file_path);
std::string json_error_string;
scoped_ptr<base::Value> root(json_deserializer.Deserialize(NULL, NULL));
if (!root.get())
return false;
// Preferences should always have a dictionary root.
if (!root->IsType(base::Value::TYPE_DICTIONARY))
return false;
return ExtractUninstallMetrics(
*static_cast<base::DictionaryValue*>(root.get()),
uninstall_metrics_string);
}
} // namespace installer
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