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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/web_applications/install_bounce_metric.h"
#include "base/metrics/histogram_macros.h"
#include "base/strings/string_number_conversions.h"
#include "chrome/common/pref_names.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
#include "components/prefs/scoped_user_pref_update.h"
#include "content/public/browser/browser_thread.h"
namespace {
std::optional<base::Time>& GetTimeOverride() {
static std::optional<base::Time> time_override;
return time_override;
}
base::Time GetTime() {
if (!GetTimeOverride())
return base::Time::Now();
return *GetTimeOverride();
}
// TODO(alancutter): Dedupe Time/Value conversion logic with
// app_banner_settings_helper.cc and PrefService.
std::optional<base::Time> ParseTime(const base::Value* value) {
if (!value || !value->is_string())
return std::nullopt;
int64_t integer;
if (!base::StringToInt64(value->GetString(), &integer))
return std::nullopt;
return base::Time::FromDeltaSinceWindowsEpoch(base::Microseconds(integer));
}
base::Value SerializeTime(const base::Time& time) {
return base::Value(
base::NumberToString(time.ToDeltaSinceWindowsEpoch().InMicroseconds()));
}
const char kInstallTimestamp[] = "install_timestamp";
const char kInstallSource[] = "install_source";
struct InstallMetrics {
base::Time timestamp;
webapps::WebappInstallSource source;
};
std::optional<InstallMetrics> ParseInstallMetricsFromPrefs(
const PrefService* pref_service,
const webapps::AppId& app_id) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
const base::Value::Dict& ids_to_metrics =
pref_service->GetDict(prefs::kWebAppInstallMetrics);
const base::Value::Dict* metrics = ids_to_metrics.FindDict(app_id);
if (!metrics)
return std::nullopt;
std::optional<base::Time> timestamp =
ParseTime(metrics->Find(kInstallTimestamp));
if (!timestamp)
return std::nullopt;
const base::Value* source = metrics->Find(kInstallSource);
if (!source || !source->is_int())
return std::nullopt;
return InstallMetrics{
*timestamp, static_cast<webapps::WebappInstallSource>(source->GetInt())};
}
void WriteInstallMetricsToPrefs(const InstallMetrics& install_metrics,
PrefService* pref_service,
const webapps::AppId& app_id) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
base::Value::Dict dict;
dict.Set(kInstallTimestamp, SerializeTime(install_metrics.timestamp));
dict.Set(kInstallSource, static_cast<int>(install_metrics.source));
ScopedDictPrefUpdate update(pref_service, prefs::kWebAppInstallMetrics);
update->Set(app_id, std::move(dict));
}
} // namespace
namespace web_app {
void SetInstallBounceMetricTimeForTesting(std::optional<base::Time> time) {
GetTimeOverride() = time;
}
void RegisterInstallBounceMetricProfilePrefs(PrefRegistrySimple* registry) {
registry->RegisterDictionaryPref(prefs::kWebAppInstallMetrics);
}
void RecordWebAppInstallationTimestamp(
PrefService* pref_service,
const webapps::AppId& app_id,
webapps::WebappInstallSource install_source) {
WriteInstallMetricsToPrefs(InstallMetrics{GetTime(), install_source},
pref_service, app_id);
}
void RecordWebAppUninstallation(PrefService* pref_service,
const webapps::AppId& app_id) {
std::optional<InstallMetrics> metrics =
ParseInstallMetricsFromPrefs(pref_service, app_id);
if (!metrics)
return;
constexpr base::TimeDelta kMaxInstallBounceDuration = base::Hours(1);
if (GetTime() - metrics->timestamp > kMaxInstallBounceDuration)
return;
UMA_HISTOGRAM_ENUMERATION("Webapp.Install.InstallBounce", metrics->source);
}
} // namespace web_app
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