[Offline pages] Downloads UI: Adding bridge for issuing notifications

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageNotificationBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageNotificationBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageNotificationBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageNotificationBridge.java
new file mode 100644
index 0000000000000000000000000000000000000000..55ef17fbd3a236ae2bd596a823c46618acab5f33
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageNotificationBridge.java
@@ -0,0 +1,136 @@
+// 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.
+
+package org.chromium.chrome.browser.offlinepages.downloads;
+
+import android.content.Context;
+
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.chrome.browser.download.DownloadInfo;
+import org.chromium.chrome.browser.download.DownloadManagerService;
+import org.chromium.chrome.browser.download.DownloadNotifier;
+
+/**
+ * Class for dispatching offline page/request related notifications to the
+ * {org.chromium.chrome.browser.download.DownloadNotifier}.
+ */
+public class OfflinePageNotificationBridge {
+    /**
+    * Update download notification to success.
+    * @param context Context to show notifications.
+    * @param guid GUID of a request to download a page related to the notification.
+    * @param url URL of the page to download.
+    */
+    @CalledByNative
+    public static void notifyDownloadSuccessful(Context context, String guid, String url) {
+        DownloadNotifier notifier = getDownloadNotifier(context);
+        if (notifier == null) return;
+
+        DownloadInfo downloadInfo = new DownloadInfo.Builder()
+                                            .setIsOfflinePage(true)
+                                            .setDownloadGuid(guid)
+                                            .setFileName(url)
+                                            .setIsResumable(false)
+                                            .setIsOffTheRecord(false)
+                                            .build();
+
+        notifier.notifyDownloadSuccessful(downloadInfo, -1, false);
+    }
+
+    /**
+     * Update download notification to failure.
+     * @param context Context to show notifications.
+     * @param guid GUID of a request to download a page related to the notification.
+     * @param url URL of the page to download.
+     */
+    @CalledByNative
+    public static void notifyDownloadFailed(Context context, String guid, String url) {
+        DownloadNotifier notifier = getDownloadNotifier(context);
+        if (notifier == null) return;
+
+        DownloadInfo downloadInfo =
+                new DownloadInfo.Builder().setIsOfflinePage(true).setDownloadGuid(guid).build();
+
+        notifier.notifyDownloadFailed(downloadInfo);
+    }
+
+    /**
+     * Called by offline page backend to notify the user of download progress.
+     * @param context Context to show notifications.
+     * @param guid GUID of a request to download a page related to the notification.
+     * @param url URL of the page to download.
+     * @param startTime Time of the request.
+     */
+    @CalledByNative
+    public static void notifyDownloadProgress(
+            Context context, String guid, String url, long startTime) {
+        DownloadNotifier notifier = getDownloadNotifier(context);
+        if (notifier == null) return;
+
+        DownloadInfo downloadInfo = new DownloadInfo.Builder()
+                                            .setIsOfflinePage(true)
+                                            .setDownloadGuid(guid)
+                                            .setFilePath(url)
+                                            .setPercentCompleted(-1)
+                                            .setIsOffTheRecord(false)
+                                            .setIsResumable(true)
+                                            .setTimeRemainingInMillis(0)
+                                            .build();
+
+        notifier.notifyDownloadProgress(downloadInfo, startTime, false);
+    }
+
+    /**
+     * Update download notification to paused.
+     * @param context Context to show notifications.
+     * @param guid GUID of a request to download a page related to the notification.
+     */
+    @CalledByNative
+    public static void notifyDownloadPaused(Context context, String guid) {
+        DownloadNotifier notifier = getDownloadNotifier(context);
+        if (notifier == null) return;
+
+        DownloadInfo downloadInfo =
+                new DownloadInfo.Builder().setIsOfflinePage(true).setDownloadGuid(guid).build();
+
+        notifier.notifyDownloadPaused(downloadInfo);
+    }
+
+    /**
+     * Update download notification to interrupted.
+     * @param context Context to show notifications.
+     * @param guid GUID of a request to download a page related to the notification.
+     */
+    @CalledByNative
+    public static void notifyDownloadInterrupted(Context context, String guid) {
+        DownloadNotifier notifier = getDownloadNotifier(context);
+        if (notifier == null) return;
+
+        DownloadInfo downloadInfo = new DownloadInfo.Builder()
+                                            .setIsOfflinePage(true)
+                                            .setDownloadGuid(guid)
+                                            .setIsResumable(true)
+                                            .build();
+
+        notifier.notifyDownloadInterrupted(downloadInfo, true);
+    }
+
+    /**
+     * Update download notification to canceled.
+     * @param context Context to show notifications.
+     * @param guid GUID of a request to download a page related to the notification.
+     */
+    @CalledByNative
+    public static void notifyDownloadCanceled(Context context, String guid) {
+        DownloadNotifier notifier = getDownloadNotifier(context);
+        if (notifier == null) return;
+
+        notifier.notifyDownloadCanceled(guid);
+    }
+
+    private static DownloadNotifier getDownloadNotifier(Context context) {
+        if (!DownloadManagerService.hasDownloadManagerService()) return null;
+        return DownloadManagerService.getDownloadManagerService(context).getDownloadNotifier();
+    }
+}