Popular sites on the NTP

chrome/browser/android/popular_sites.h

+// 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.
+
+#ifndef CHROME_BROWSER_ANDROID_POPULAR_SITES_H_
+#define CHROME_BROWSER_ANDROID_POPULAR_SITES_H_
+
+#include <string>
+#include <vector>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+
+namespace base {
+class FilePath;
+}
+
+namespace net {
+class URLRequestContextGetter;
+}
+
+class FileDownloader;
+
+class PopularSites {

[Bernhard Bauer, 2015/08/03 17:04:51]

Document this class?

[Marc Treib, 2015/08/04 08:16:42]

Done.

+ public:
+  struct Site {
+    Site(const std::string& title, const std::string& url);
+
+    std::string title;

[Bernhard Bauer, 2015/08/03 17:04:51]

Can this be a base::string16?

[Marc Treib, 2015/08/04 08:16:42]

It could, but why? We're getting UTF8 from the json.

[Bernhard Bauer, 2015/08/04 08:30:02]

It's a user-visible string, and we tend to store these as base::string16 (see
also the std::vector<base::string16> they end up in). DictionaryValue::GetString
also has an overload for base::string16*, so you don't even need to do the
conversion yourself.

[Marc Treib, 2015/08/04 08:58:42]

Alright, done.

+    std::string url;

[Bernhard Bauer, 2015/08/03 17:04:51]

And this a GURL?

[Marc Treib, 2015/08/04 08:16:42]

Hm, yeah, I guess that makes for a somewhat cleaner interface. Done.

+  };
+
+  using FinishedCallback = base::Callback<void(bool /* success */)>;
+
+  PopularSites(net::URLRequestContextGetter* request_context,
+               const FinishedCallback& callback);
+  ~PopularSites();
+
+  const std::vector<Site>& sites() const { return sites_; }
+
+ private:
+  void OnDownloadDone(const base::FilePath& path, bool success);
+  void OnJsonParsed(scoped_ptr<std::vector<Site>> sites);
+
+  FinishedCallback callback_;
+  scoped_ptr<FileDownloader> downloader_;
+  std::vector<Site> sites_;
+
+  base::WeakPtrFactory<PopularSites> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PopularSites);
+};
+
+#endif  // CHROME_BROWSER_ANDROID_POPULAR_SITES_H_