Preparation CL for WebRTC performance test using promise-based getStats

chrome/browser/media/webrtc/test_stats_dictionary.cc

+// Copyright 2016 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/media/webrtc/test_stats_dictionary.h"
+
+#include "base/json/json_writer.h"
+
+namespace content {
+
+TestStatsReportDictionary::TestStatsReportDictionary(
+    std::unique_ptr<base::DictionaryValue> report)
+    : report_(std::move(report)) {
+  DCHECK(report_);
+}
+
+TestStatsReportDictionary::~TestStatsReportDictionary() {
+}
+
+void TestStatsReportDictionary::ForEach(
+    std::function<void(const TestStatsDictionary&)> iteration) {
+  for (base::DictionaryValue::Iterator it(*report_); !it.IsAtEnd();
+       it.Advance()) {
+    const base::DictionaryValue* it_value;
+    DCHECK(it.value().GetAsDictionary(&it_value));
+    iteration(TestStatsDictionary(this, it_value));
+  }
+}
+
+std::vector<TestStatsDictionary> TestStatsReportDictionary::Filter(
+    std::function<bool(const TestStatsDictionary&)> filter) {
+  std::vector<TestStatsDictionary> result;
+  ForEach([&result, &filter](const TestStatsDictionary& stats) {
+    if (filter(stats))
+      result.push_back(stats);
+  });
+  return result;
+}
+
+std::unique_ptr<TestStatsDictionary> TestStatsReportDictionary::Get(
+    const std::string& id) {
+  const base::DictionaryValue* dictionary;
+  if (!report_->GetDictionary(id, &dictionary))
+    return nullptr;
+  return std::unique_ptr<TestStatsDictionary>(
+      new TestStatsDictionary(this, dictionary));
+}
+
+std::vector<TestStatsDictionary> TestStatsReportDictionary::GetAll() {
+  return Filter([](const TestStatsDictionary&) { return true; });
+}
+
+std::vector<TestStatsDictionary> TestStatsReportDictionary::GetByType(
+    const std::string& type) {
+  return Filter([&type](const TestStatsDictionary& stats) {
+    return stats.GetString("type") == type;
+  });
+}
+
+TestStatsDictionary::TestStatsDictionary(
+    TestStatsReportDictionary* report, const base::DictionaryValue* stats)
+    : report_(report), stats_(stats) {
+  DCHECK(report_);
+  DCHECK(stats_);
+}
+
+TestStatsDictionary::TestStatsDictionary(
+    const TestStatsDictionary& other) = default;
+
+TestStatsDictionary::~TestStatsDictionary() {
+}
+
+bool TestStatsDictionary::IsBoolean(const std::string& key) const {
+  bool value;
+  return GetBoolean(key, &value);
+}
+
+bool TestStatsDictionary::GetBoolean(const std::string& key) const {
+  bool value;
+  DCHECK(GetBoolean(key, &value));
+  return value;
+}
+
+bool TestStatsDictionary::IsNumber(const std::string& key) const {
+  double value;
+  return GetNumber(key, &value);
+}
+
+double TestStatsDictionary::GetNumber(const std::string& key) const {
+  double value;
+  DCHECK(GetNumber(key, &value));
+  return value;
+}
+
+bool TestStatsDictionary::IsString(const std::string& key) const {
+  std::string value;
+  return GetString(key, &value);
+}
+
+std::string TestStatsDictionary::GetString(const std::string& key) const {
+  std::string value;
+  DCHECK(GetString(key, &value));
+  return value;
+}
+
+bool TestStatsDictionary::IsSequenceBoolean(const std::string& key) const {
+  std::vector<bool> value;
+  return GetSequenceBoolean(key, &value);
+}
+
+std::vector<bool> TestStatsDictionary::GetSequenceBoolean(
+    const std::string& key) const {
+  std::vector<bool> value;
+  DCHECK(GetSequenceBoolean(key, &value));
+  return value;
+}
+
+bool TestStatsDictionary::IsSequenceNumber(const std::string& key) const {
+  std::vector<double> value;
+  return GetSequenceNumber(key, &value);
+}
+
+std::vector<double> TestStatsDictionary::GetSequenceNumber(
+    const std::string& key) const {
+  std::vector<double> value;
+  DCHECK(GetSequenceNumber(key, &value));
+  return value;
+}
+
+bool TestStatsDictionary::IsSequenceString(const std::string& key) const {
+  std::vector<std::string> value;
+  return GetSequenceString(key, &value);
+}
+
+std::vector<std::string> TestStatsDictionary::GetSequenceString(
+    const std::string& key) const {
+  std::vector<std::string> value;
+  DCHECK(GetSequenceString(key, &value));
+  return value;
+}
+
+bool TestStatsDictionary::GetBoolean(
+    const std::string& key, bool* out) const {
+  return stats_->GetBoolean(key, out);
+}
+
+bool TestStatsDictionary::GetNumber(
+    const std::string& key, double* out) const {
+  return stats_->GetDouble(key, out);
+}
+
+bool TestStatsDictionary::GetString(
+    const std::string& key, std::string* out) const {
+  return stats_->GetString(key, out);
+}
+
+bool TestStatsDictionary::GetSequenceBoolean(
+    const std::string& key,
+    std::vector<bool>* out) const {
+  const base::ListValue* list;
+  if (!stats_->GetList(key, &list))
+    return false;
+  std::vector<bool> sequence;
+  bool element;
+  for (size_t i = 0; i < list->GetSize(); ++i) {
+    if (!list->GetBoolean(i, &element))
+      return false;
+    sequence.push_back(element);
+  }
+  *out = std::move(sequence);
+  return true;
+}
+
+bool TestStatsDictionary::GetSequenceNumber(
+    const std::string& key,
+    std::vector<double>* out) const {
+  const base::ListValue* list;
+  if (!stats_->GetList(key, &list))
+    return false;
+  std::vector<double> sequence;
+  double element;
+  for (size_t i = 0; i < list->GetSize(); ++i) {
+    if (!list->GetDouble(i, &element))
+      return false;
+    sequence.push_back(element);
+  }
+  *out = std::move(sequence);
+  return true;
+}
+
+bool TestStatsDictionary::GetSequenceString(
+    const std::string& key,
+    std::vector<std::string>* out) const {
+  const base::ListValue* list;
+  if (!stats_->GetList(key, &list))
+    return false;
+  std::vector<std::string> sequence;
+  std::string element;
+  for (size_t i = 0; i < list->GetSize(); ++i) {
+    if (!list->GetString(i, &element))
+      return false;
+    sequence.push_back(element);
+  }
+  *out = std::move(sequence);
+  return true;
+}
+
+std::string TestStatsDictionary::ToString() const {
+  std::string str;
+  CHECK(base::JSONWriter::WriteWithOptions(
+      *stats_, base::JSONWriter::OPTIONS_PRETTY_PRINT, &str));
+  return str;
+}
+
+}  // namespace content