Track age and score of snippets that are clicked (along with position).

chrome/browser/android/ntp/ntp_snippets_bridge.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/ntp/ntp_snippets_bridge.h"
 
 #include <jni.h>
 
 #include "base/android/callback_android.h"
 #include "base/android/jni_android.h"
@@ skipping 10 matching lines @@
 #include "components/ntp_snippets/ntp_snippets_service.h"
 #include "jni/SnippetsBridge_jni.h"
 #include "ui/gfx/android/java_bitmap.h"
 #include "ui/gfx/image/image.h"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertJavaStringToUTF8;
 using base::android::JavaParamRef;
 using base::android::ToJavaArrayOfStrings;
 using base::android::ToJavaLongArray;
+using base::android::ToJavaFloatArray;
 using base::android::ScopedJavaGlobalRef;
 using base::android::ScopedJavaLocalRef;
 
 namespace {
 
 void SnippetVisitedHistoryRequestCallback(
       base::android::ScopedJavaGlobalRef<jobject> callback,
       bool success,
       const history::URLRow& row,
       const history::VisitVector& visitVector) {
@@ skipping 87 matching lines @@
   // URL for the article. This will also be used to find the favicon for the
   // article.
   std::vector<std::string> urls;
   // URL for the AMP version of the article if it exists. This will be used as
   // the URL to direct the user to on tap.
   std::vector<std::string> amp_urls;
   std::vector<std::string> thumbnail_urls;
   std::vector<std::string> snippets;
   std::vector<int64_t> timestamps;
   std::vector<std::string> publishers;
+  std::vector<float> scores;
   for (const std::unique_ptr<ntp_snippets::NTPSnippet>& snippet :
        ntp_snippets_service_->snippets()) {
     ids.push_back(snippet->id());
     titles.push_back(snippet->title());
     // The url from source_info is a url for a site that is one of the
     // HOST_RESTRICT parameters, so this is preferred.
     urls.push_back(snippet->best_source().url.spec());
     amp_urls.push_back(snippet->best_source().amp_url.spec());
     thumbnail_urls.push_back(snippet->salient_image_url().spec());
     snippets.push_back(snippet->snippet());
     timestamps.push_back(snippet->publish_date().ToJavaTime());
     publishers.push_back(snippet->best_source().publisher_name);
+    scores.push_back(snippet->score());
   }
 
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_SnippetsBridge_onSnippetsAvailable(
       env, observer_.obj(), ToJavaArrayOfStrings(env, ids).obj(),
       ToJavaArrayOfStrings(env, titles).obj(),
       ToJavaArrayOfStrings(env, urls).obj(),
       ToJavaArrayOfStrings(env, amp_urls).obj(),
       ToJavaArrayOfStrings(env, thumbnail_urls).obj(),
       ToJavaArrayOfStrings(env, snippets).obj(),
       ToJavaLongArray(env, timestamps).obj(),
-      ToJavaArrayOfStrings(env, publishers).obj());
+      ToJavaArrayOfStrings(env, publishers).obj(),
+      ToJavaFloatArray(env, scores).obj());
 }
 
 void NTPSnippetsBridge::NTPSnippetsServiceShutdown() {
   observer_.Reset();
   snippet_service_observer_.Remove(ntp_snippets_service_);
 }
 
 void NTPSnippetsBridge::NTPSnippetsServiceDisabled() {
   // The user signed out or disabled sync. Since snippets rely on those, we
   // clear them to be consistent with the initially signed out state.
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_SnippetsBridge_onSnippetsDisabled(env, observer_.obj());
 }
 
 void NTPSnippetsBridge::OnImageFetched(ScopedJavaGlobalRef<jobject> callback,
                                        const std::string& snippet_id,
                                        const gfx::Image& image) {
   ScopedJavaLocalRef<jobject> j_bitmap;
   if (!image.IsEmpty())
     j_bitmap = gfx::ConvertToJavaBitmap(image.ToSkBitmap());
 
   base::android::RunCallbackAndroid(callback, j_bitmap);
 }
 
 // static
 bool NTPSnippetsBridge::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }