Upstream chrome's DownloadNotifier

These are the files chrome uses to notify the user download has progressed or finished.
They previously sits in the down stream directory.
Will upstream the DownloadManagerService in the next CL.

BUG=159202

Review URL: https://codereview.chromium.org/832493003

Cr-Commit-Position: refs/heads/master@{#310351}

3 files changed, 165 insertions, 0 deletions

diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotifier.java b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotifier.java
new file mode 100644
index 0000000..053a730
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotifier.java
@@ -0,0 +1,38 @@
+// Copyright 2015 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.
+
+package org.chromium.chrome.browser.download;
+
+import org.chromium.content.browser.DownloadInfo;
+
+/**
+ * Class for reporting the status of a download.
+ */
+public interface DownloadNotifier {
+    /**
+     * Add a download successful notification.
+     * @param downloadInfo info about the successful download.
+     */
+    void notifyDownloadSuccessful(DownloadInfo downloadInfo);
+
+    /**
+     * Add a download failed notification.
+     * @param downloadInfo info about the failed download.
+     */
+    void notifyDownloadFailed(DownloadInfo downloadInfo);
+
+    /**
+     * @param downloadInfo info about in progress download.
+     * @param startTimeInMillis the startTime of the download, measured in milliseconds, between the
+     *        current time and midnight, January 1, 1970 UTC. Useful to keep progress notifications
+     *        sorted by time.
+     */
+    void notifyDownloadProgress(DownloadInfo downloadInfo, long startTimeInMillis);
+
+    /**
+     * Cancel the notification for a download.
+     * @param downloadId the downloadId of the cancelled download.
+     */
+    void cancelNotification(int downloadId);
+}
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/SystemDownloadNotifier.java b/chrome/android/java/src/org/chromium/chrome/browser/download/SystemDownloadNotifier.java
new file mode 100644
index 0000000..b140a22
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/SystemDownloadNotifier.java
@@ -0,0 +1,120 @@
+// Copyright 2015 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.
+
+package org.chromium.chrome.browser.download;
+
+import android.app.DownloadManager;
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.content.Context;
+import android.support.v4.app.NotificationCompat;
+import android.text.TextUtils;
+import android.util.Log;
+import android.widget.Toast;
+
+import org.chromium.chrome.R;
+
+import org.chromium.content.browser.DownloadInfo;
+import org.chromium.ui.base.LocalizationUtils;
+
+import java.text.NumberFormat;
+import java.util.Locale;
+
+/**
+ * DownloadNotifier implementation that uses Android Notification service and DownloadManager
+ * service to create download notifications.
+ */
+public class SystemDownloadNotifier implements DownloadNotifier {
+    private static final String UNKNOWN_MIME_TYPE = "application/unknown";
+    private static final String LOGTAG = "SystemDownloadNotifier";
+    private static final String NOTIFICATION_NAMESPACE = "SystemDownloadNotifier";
+
+    private final NotificationManager mNotificationManager;
+    private final DownloadManager mDownloadManager;
+
+    private final Context mApplicationContext;
+
+    /**
+     * Constructor.
+     * @param context Application context.
+     */
+    public SystemDownloadNotifier(Context context) {
+        mApplicationContext = context.getApplicationContext();
+        mNotificationManager = (NotificationManager) mApplicationContext
+                .getSystemService(Context.NOTIFICATION_SERVICE);
+        mDownloadManager = (DownloadManager) mApplicationContext
+                .getSystemService(Context.DOWNLOAD_SERVICE);
+    }
+
+    /**
+     * Update the notification with id.
+     * @param id Id of the notification that has to be updated.
+     * @param notification the notification object that needs to be updated.
+     */
+    private void updateNotification(int id, Notification notification) {
+        mNotificationManager.notify(NOTIFICATION_NAMESPACE, id, notification);
+    }
+
+    @Override
+    public void cancelNotification(int downloadId) {
+        mNotificationManager.cancel(NOTIFICATION_NAMESPACE, downloadId);
+    }
+
+    @Override
+    public void notifyDownloadSuccessful(DownloadInfo downloadInfo) {
+        String mimeType = downloadInfo.getMimeType();
+        if (TextUtils.isEmpty(mimeType)) mimeType = UNKNOWN_MIME_TYPE;
+
+        try {
+            String description = downloadInfo.getDescription();
+            if (TextUtils.isEmpty(description)) description = downloadInfo.getFileName();
+            mDownloadManager.addCompletedDownload(downloadInfo.getFileName(), description, true,
+                    mimeType, downloadInfo.getFilePath(), downloadInfo.getContentLength(), true);
+        } catch (IllegalArgumentException e) {
+            // TODO(qinmin): Properly handle the case that we fail to add a completed
+            // download item to DownloadManager
+            Log.w(LOGTAG, "Failed to add the download item to DownloadManager: " + e);
+            Toast.makeText(mApplicationContext, R.string.cannot_add_downloaded_item_to_manager,
+                    Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    @Override
+    public void notifyDownloadFailed(DownloadInfo downloadInfo) {
+        NotificationCompat.Builder builder = new NotificationCompat.Builder(
+                mApplicationContext)
+                .setContentTitle(downloadInfo.getFileName())
+                .setSmallIcon(android.R.drawable.stat_sys_download_done)
+                .setOngoing(false)
+                .setLocalOnly(true)
+                .setAutoCancel(true)
+                .setContentText(mApplicationContext.getResources().getString(
+                        R.string.download_notification_failed));
+        updateNotification(downloadInfo.getDownloadId(), builder.build());
+    }
+
+    @Override
+    public void notifyDownloadProgress(DownloadInfo downloadInfo, long startTime) {
+        // getPercentCompleted returns -1 if download time is indeterminate.
+        boolean indeterminate = downloadInfo.getPercentCompleted() == -1;
+        NotificationCompat.Builder builder = new NotificationCompat.Builder(mApplicationContext)
+                .setContentTitle(downloadInfo.getFileName())
+                .setSmallIcon(android.R.drawable.stat_sys_download)
+                .setOngoing(true)
+                .setLocalOnly(true)
+                .setAutoCancel(true)
+                .setProgress(100, downloadInfo.getPercentCompleted(), indeterminate);
+
+        if (!indeterminate) {
+            NumberFormat formatter = NumberFormat.getPercentInstance(Locale.getDefault());
+            String percentText = formatter.format(downloadInfo.getPercentCompleted() / 100.0);
+            String duration = LocalizationUtils.getDurationString(
+                    downloadInfo.getTimeRemainingInMillis());
+            builder.setContentText(duration).setContentInfo(percentText);
+        }
+        if (startTime > 0) builder.setWhen(startTime);
+
+        updateNotification(downloadInfo.getDownloadId(), builder.build());
+    }
+}
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index 5a2e741..41e8001 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -673,6 +673,13 @@ You are signing in with a managed account and giving its administrator control o
 Drag from top to exit.
       </message>
 
+      <!-- Download UI -->
+      <message name="IDS_DOWNLOAD_NOTIFICATION_FAILED" desc="Download notification to be displayed when a download fails.">
+        Download failed.
+      </message>
+      <message name="IDS_CANNOT_ADD_DOWNLOADED_ITEM_TO_MANAGER" desc="Toast for a download which has completed but cannot be added to the download manager">
+        Failed to add downloaded item to the download manager.
+      </message>
     </messages>
   </release>
 </grit>