Post notification after fetching articles

chrome/android/java/src/org/chromium/chrome/browser/ntp/ContentSuggestionsNotificationHelper.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/ContentSuggestionsNotificationHelper.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/ContentSuggestionsNotificationHelper.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/ContentSuggestionsNotificationHelper.java
index fbe8a13a88505feb373317f6c8b2ed301515abcc..412887fafdd648e7a4056fd9f74f805defb9d6b9 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/ContentSuggestionsNotificationHelper.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/ContentSuggestionsNotificationHelper.java
@@ -4,13 +4,18 @@
 
 package org.chromium.chrome.browser.ntp;
 
+import android.app.NotificationManager;
+import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
+import android.graphics.Bitmap;
 import android.net.Uri;
 import android.provider.Browser;
+import android.support.v4.app.NotificationCompat;
 
 import org.chromium.base.ContextUtils;
 import org.chromium.base.annotations.CalledByNative;
+import org.chromium.chrome.R;
 import org.chromium.chrome.browser.IntentHandler;
 import org.chromium.chrome.browser.ShortcutHelper;
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
@@ -21,6 +26,9 @@ import org.chromium.chrome.browser.document.ChromeLauncherActivity;
  * Exposes helper functions to native C++ code.
  */
 public class ContentSuggestionsNotificationHelper {
+    private static final String TAG = "ContentSuggestionsNotification";

[dgn, 2016/12/28 11:00:26]

nit: name it differently (NOTIFICATION_TAG maybe?) to avoid confusion with the
tag used for logs. The latter has a limit in the number of characters that this
string exceeds.

[sfiera, 2017/01/05 13:35:01]

Done.

+    private static final int ID = 0;
+
     private ContentSuggestionsNotificationHelper() {} // Prevent instantiation
 
     @CalledByNative
@@ -36,4 +44,34 @@ public class ContentSuggestionsNotificationHelper {
         IntentHandler.addTrustedIntentExtras(intent, context);
         context.startActivity(intent);
     }
+
+    @CalledByNative
+    private static void showNotification(String url, String title, String text, Bitmap image) {
+        Context context = ContextUtils.getApplicationContext();
+        NotificationManager manager =
+                (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+        Intent intent = new Intent()
+                                .setAction(Intent.ACTION_VIEW)
+                                .setData(Uri.parse(url))
+                                .setClass(context, ChromeLauncherActivity.class)
+                                .putExtra(ShortcutHelper.REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB, true)
+                                .putExtra(Browser.EXTRA_APPLICATION_ID, context.getPackageName());
+        NotificationCompat.Builder builder =
+                new NotificationCompat.Builder(context)
+                        .setAutoCancel(true)
+                        .setContentIntent(PendingIntent.getActivity(context, 0, intent, 0))
+                        .setContentTitle(title)
+                        .setContentText(text)
+                        .setLargeIcon(image)
+                        .setSmallIcon(R.drawable.ic_chrome);
+        manager.notify(TAG, ID, builder.build());
+    }
+
+    @CalledByNative
+    private static void hideNotification() {
+        Context context = ContextUtils.getApplicationContext();
+        NotificationManager manager =
+                (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+        manager.cancel(TAG, ID);
+    }
 }