Initial CL for talking to the WebAPK server to generate WebAPK

chrome/browser/android/webapk/webapk_builder.h

+// 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.
+
+#ifndef CHROME_BROWSER_ANDROID_WEBAPK_WEBAPK_BUILDER_H_
+#define CHROME_BROWSER_ANDROID_WEBAPK_WEBAPK_BUILDER_H_
+
+#include <jni.h>
+#include <memory>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/timer/timer.h"
+#include "chrome/browser/android/shortcut_info.h"
+#include "chrome/browser/net/file_downloader.h"
+#include "net/url_request/url_fetcher_delegate.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+
+namespace base {
+class FilePath;
+}
+
+namespace content {
+class BrowserContext;
+}
+
+namespace net {
+class URLFetcher;
+class URLRequestContextGetter;
+}
+
+namespace webapk {
+class CreateWebApkRequest;
+}
+
+// Talks to Chrome WebAPK server and Google Play to generate a WebAPK on the
+// server, download it, and install it.
+class WebApkBuilder : public net::URLFetcherDelegate {

[Robert Sesek, 2016/07/25 23:01:33]

Why is this not WebApkInstaller if it also installs the APK?

[pkotwicz, 2016/07/26 17:54:46]

Done.

+ public:
+  typedef base::Callback<void(bool)> FinishCallback;

[Robert Sesek, 2016/07/25 23:01:33]

using FinishCallback = base::Callback<void(bool); is the preferred C++11 syntax.

[pkotwicz, 2016/07/26 17:54:46]

Done.

+
+  WebApkBuilder(content::BrowserContext* browser_context,
+                const ShortcutInfo& shortcut_info,
+                const SkBitmap& shorcut_icon);
+  ~WebApkBuilder() override;
+
+  // Register JNI methods.
+  static bool Register(JNIEnv* env);
+
+  // Talks to the Chrome WebAPK server to generate a WebAPK on the server and to

[Robert Sesek, 2016/07/25 23:01:33]

Can this be called more than once per object?

[pkotwicz, 2016/07/26 17:54:46]

No it cannot

+  // Google Play to install the generated WebAPK. Calls |callback| after the
+  // request to install the WebAPK is sent to Google Play.
+  void BuildAsync(const FinishCallback& callback);

[Robert Sesek, 2016/07/25 23:01:33]

Similarly, shouldn't this be "Install" ?

[pkotwicz, 2016/07/26 17:54:46]

Done.

+
+ private:
+  // net::URLFetcherDelegate:
+  void OnURLFetchComplete(const net::URLFetcher* source) override;
+
+  // Initializes |request_context_getter_| on UI thread.
+  void InitializeRequestContextGetterOnUIThread();
+
+  // Sends request to WebAPK server to create WebAPK. During a successful
+  // request the WebAPK server responds with the URL of the generated WebAPK.
+  void SendCreateWebApkRequest();
+
+  // Called with the URL of generated WebAPK and the package name that the
+  // WebAPK should be installed at.
+  void OnGotWebApkDownloadUrl(const std::string& download_url,
+                              const std::string& package_name);
+
+  // Called once the WebAPK has been downloaded.

[Robert Sesek, 2016/07/25 23:01:34]

Mention that this installs the APK.

[pkotwicz, 2016/07/26 17:54:46]

Done.

+  // |file_path| is the file path that the WebAPK was downloaded to.
+  // |package_name| is the package name that the WebAPK should be installed at.
+  void OnWebApkDownloaded(const base::FilePath& file_path,
+                          const std::string& package_name,
+                          FileDownloader::Result result);
+
+  // Populates webapk::CreateWebApkRequest and returns it.
+  std::unique_ptr<webapk::CreateWebApkRequest> BuildCreateWebApkRequest();
+
+  // Called when the request to the WebAPK server times out or when the WebAPK
+  // download times out.
+  void OnTimeout();
+
+  // Called when the request to install the WebAPK is sent to Google Play.
+  void OnSuccess();
+
+  // Called if a WebAPK could not be created. WebApkBuilder only tracks the
+  // WebAPK creation and the WebAPK download. It does not track the
+  // WebAPK installation. OnFailure() is not called if the WebAPK could not be
+  // installed.
+  void OnFailure();
+
+  content::BrowserContext* browser_context_;
+  net::URLRequestContextGetter* request_context_getter_;
+
+  // Sends HTTP request to WebAPK server.
+  std::unique_ptr<net::URLFetcher> url_fetcher_;
+
+  // Downloads WebAPK.
+  std::unique_ptr<FileDownloader> downloader_;
+
+  // Fails WebApkBuilder if WebAPK server takes too long to respond or if the
+  // download takes too long.
+  base::OneShotTimer timer_;
+
+  // Callback to call once WebApkBuilder succeeds or fails.
+  FinishCallback finish_callback_;
+
+  // Web Manifest info.
+  const ShortcutInfo shortcut_info_;
+
+  // WebAPK app icon.
+  const SkBitmap shortcut_icon_;
+
+  // WebAPK server URL.
+  GURL server_url_;
+
+  // Used to get |weak_ptr_| on the IO thread.
+  base::WeakPtrFactory<WebApkBuilder> io_weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebApkBuilder);
+};
+
+#endif  // CHROME_BROWSER_ANDROID_WEBAPK_WEBAPK_BUILDER_H_