[NTP::Push] Adding Breaking News Subscription Manager

components/ntp_snippets/breaking_news/subscription_manager.h

Index: components/ntp_snippets/breaking_news/subscription_manager.h
diff --git a/components/ntp_snippets/breaking_news/subscription_manager.h b/components/ntp_snippets/breaking_news/subscription_manager.h
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+// Copyright 2017 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 COMPONENTS_NTP_SNIPPETS_BREAKING_NEWS_SUBSCRIPTION_MANAGER_H_
+#define COMPONENTS_NTP_SNIPPETS_BREAKING_NEWS_SUBSCRIPTION_MANAGER_H_
+
+#include "components/ntp_snippets/breaking_news/subscription_json_request.h"
+#include "net/url_request/url_request_context_getter.h"
+#include "url/gurl.h"
+
+namespace ntp_snippets {
+
+class SubscriptionManager {
+ public:
+  SubscriptionManager(
+      scoped_refptr<net::URLRequestContextGetter> url_request_context_getter,
+      PrefService* pref_service);
+
+  ~SubscriptionManager();
+
+  void Subscribe(const std::string& token);
+  void Unsubscribe(const std::string& token);
+
+ private:
+  // Holds the URL request context.
+  scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_;
+
+  std::unique_ptr<internal::SubscriptionJsonRequest> subscription_request_;
+
+  // API endpoint for subscribing.
+  // TODO(mamir): retrieve the correct fetch point
+  // See:
+  // components/ntp_snippets/remote/remote_suggestions_fetcher.cc?type=cs&l=175
+  const GURL subscribe_url_{"http://valid-url.test"};
+
+  std::string subscription_token_;
+  PrefService* pref_service_;
+
+  void DidSubscribe(const ntp_snippets::Status& status);
+
+  DISALLOW_COPY_AND_ASSIGN(SubscriptionManager);
+};
+}
+#endif  // COMPONENTS_NTP_SNIPPETS_BREAKING_NEWS_SUBSCRIPTION_MANAGER_H_