[TTS] Record CTR by week and 28-day intervals.

chrome/browser/android/contextualsearch/ctr_recorder.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/android/contextualsearch/ctr_recorder.h"
+
+#include <set>
+
+#include "base/android/jni_string.h"
+#include "base/android/scoped_java_ref.h"
+#include "jni/CTRRecorder_jni.h"
+
+using base::android::AttachCurrentThread;
+using base::android::ConvertUTF8ToJavaString;
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
+using contextual_search::CTRAggregator;
+
+CTRRecorder::CTRRecorder(JNIEnv* env, jobject obj)
+    : WeeklyActivityStorage(contextual_search::kNumWeeksNeededFor28DayData) {
+  java_object_.Reset(env, obj);
+
+  // NOTE: Creating the aggregator needs to be done after setting up the Java
+  // object because the constructor will call back through the Java object
+  // to access storage.
+  aggregator_.reset(new CTRAggregator(*this));
+  DCHECK(aggregator_);
+}
+
+CTRRecorder::~CTRRecorder() {
+  JNIEnv* env = AttachCurrentThread();
+  Java_CTRRecorder_clearNativePointer(env, java_object_.obj());
+}
+
+// Java conduit
+
+void CTRRecorder::RecordImpression(JNIEnv* env,
+                                   const JavaParamRef<jobject>& obj,
+                                   jboolean did_click) {
+  aggregator_->RecordImpression(did_click);
+}
+
+jint CTRRecorder::GetCurrentWeekNumber(JNIEnv* env,
+                                       const JavaParamRef<jobject>& obj) {
+  return aggregator_->GetCurrentWeekNumber();
+}
+
+jboolean CTRRecorder::HasPreviousWeekData(JNIEnv* env,
+                                          const JavaParamRef<jobject>& obj) {
+  return aggregator_->HasPreviousWeekData();
+}
+
+jint CTRRecorder::GetPreviousWeekImpressions(JNIEnv* env,
+                                             const JavaParamRef<jobject>& obj) {
+  return aggregator_->GetPreviousWeekImpressions();
+}
+
+jfloat CTRRecorder::GetPreviousWeekCTR(JNIEnv* env,
+                                       const JavaParamRef<jobject>& obj) {
+  return aggregator_->GetPreviousWeekCTR();
+}
+
+jboolean CTRRecorder::HasPrevious28DayData(JNIEnv* env,
+                                           const JavaParamRef<jobject>& obj) {
+  return aggregator_->HasPrevious28DayData();
+}
+
+jint CTRRecorder::GetPrevious28DayImpressions(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj) {
+  return aggregator_->GetPrevious28DayImpressions();
+}
+
+jfloat CTRRecorder::GetPrevious28DayCTR(JNIEnv* env,
+                                        const JavaParamRef<jobject>& obj) {
+  return aggregator_->GetPrevious28DayCTR();
+}
+
+// WeeklyActivityStorage overrides
+
+int CTRRecorder::ReadStorage(std::string storage_bucket) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> j_storage_bucket =
+      ConvertUTF8ToJavaString(env, storage_bucket.c_str());
+  return Java_CTRRecorder_readInt(env, java_object_, j_storage_bucket);
+}
+
+void CTRRecorder::WriteStorage(std::string storage_bucket, int value) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> j_storage_bucket =
+      ConvertUTF8ToJavaString(env, storage_bucket.c_str());
+  Java_CTRRecorder_writeInt(env, java_object_, j_storage_bucket, value);
+}
+
+// Java wrapper boilerplate
+
+void CTRRecorder::Destroy(JNIEnv* env, const JavaParamRef<jobject>& obj) {
+  delete this;
+}
+
+bool RegisterCTRRecorder(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
+  CTRRecorder* recorder = new CTRRecorder(env, obj);
+  return reinterpret_cast<intptr_t>(recorder);
+}