[NTP::Push] Adding BreakingNewsSuggestionsProvider

components/ntp_snippets/breaking_news/breaking_news_suggestions_provider.cc

+// 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.
+
+#include "components/ntp_snippets/breaking_news/breaking_news_suggestions_provider.h"
+
+#include "base/bind.h"
+#include "components/ntp_snippets/breaking_news/content_suggestions_gcm_app_handler.h"
+#include "components/ntp_snippets/category.h"
+#include "components/ntp_snippets/pref_names.h"
+#include "components/strings/grit/components_strings.h"
+
+namespace ntp_snippets {
+
+BreakingNewsSuggestionsProvider::BreakingNewsSuggestionsProvider(
+    ContentSuggestionsProvider::Observer* observer,
+    std::unique_ptr<ContentSuggestionsGCMAppHandler> gcm_app_handler)
+    : ContentSuggestionsProvider(observer),
+      gcm_app_handler_(std::move(gcm_app_handler)),
+      provided_category_(
+          Category::FromKnownCategory(KnownCategories::BREAKING_NEWS)),
+      category_status_(CategoryStatus::INITIALIZING) {}
+
+BreakingNewsSuggestionsProvider::~BreakingNewsSuggestionsProvider() {
+  gcm_app_handler_->StopListening();
+}
+
+void BreakingNewsSuggestionsProvider::Start() {
+  // Unretained because |this| owns |gcm_app_handler_|.
+  gcm_app_handler_->StartListening(
+      base::Bind(&BreakingNewsSuggestionsProvider::OnNewContentSuggestion,
+                 base::Unretained(this)));
+}
+
+void BreakingNewsSuggestionsProvider::OnNewContentSuggestion(
+    const base::Value& content) {}
+
+////////////////////////////////////////////////////////////////////////////////
+// Private methods
+
+CategoryStatus BreakingNewsSuggestionsProvider::GetCategoryStatus(
+    Category category) {
+  DCHECK_EQ(category, provided_category_);
+  return category_status_;
+}
+
+CategoryInfo BreakingNewsSuggestionsProvider::GetCategoryInfo(
+    Category category) {
+  // TODO(mamir): needs to be corrected, just a placeholer
+  return CategoryInfo(base::string16(),
+                      ContentSuggestionsCardLayout::MINIMAL_CARD,
+                      ContentSuggestionsAdditionalAction::VIEW_ALL,
+                      /*show_if_empty=*/false, base::string16());
+}
+
+void BreakingNewsSuggestionsProvider::DismissSuggestion(
+    const ContentSuggestion::ID& suggestion_id) {}
+
+void BreakingNewsSuggestionsProvider::FetchSuggestionImage(
+    const ContentSuggestion::ID& suggestion_id,
+    const ImageFetchedCallback& callback) {}
+
+void BreakingNewsSuggestionsProvider::Fetch(
+    const Category& category,
+    const std::set<std::string>& known_suggestion_ids,
+    const FetchDoneCallback& callback) {}
+
+void BreakingNewsSuggestionsProvider::ClearHistory(
+    base::Time begin,
+    base::Time end,
+    const base::Callback<bool(const GURL& url)>& filter) {
+  // TODO(mamir): clear the provider.
+}
+
+void BreakingNewsSuggestionsProvider::ClearCachedSuggestions(
+    Category category) {
+  DCHECK_EQ(category, provided_category_);
+  // TODO(mamir): clear the cached suggestions.
+}
+
+void BreakingNewsSuggestionsProvider::GetDismissedSuggestionsForDebugging(
+    Category category,
+    const DismissedSuggestionsCallback& callback) {}
+
+void BreakingNewsSuggestionsProvider::ClearDismissedSuggestionsForDebugging(
+    Category category) {}
+
+}  // namespace ntp_snippets