Index: components/offline_pages/core/prefetch/suggested_articles_observer.cc |
diff --git a/components/offline_pages/core/prefetch/suggested_articles_observer.cc b/components/offline_pages/core/prefetch/suggested_articles_observer.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..2a1990e6ed83686a4df5c19ca79b0a4847377896 |
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+++ b/components/offline_pages/core/prefetch/suggested_articles_observer.cc |
@@ -0,0 +1,115 @@ |
+// 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/offline_pages/core/prefetch/suggested_articles_observer.h" |
+ |
+#include <unordered_set> |
+ |
+#include "base/memory/ptr_util.h" |
+#include "components/ntp_snippets/category.h" |
+#include "components/ntp_snippets/category_status.h" |
+#include "components/offline_pages/core/client_namespace_constants.h" |
+#include "components/offline_pages/core/offline_page_feature.h" |
+#include "components/offline_pages/core/offline_page_item.h" |
+#include "components/offline_pages/core/prefetch/prefetch_dispatcher.h" |
+#include "components/offline_pages/core/prefetch/prefetch_service_impl.h" |
+ |
+using ntp_snippets::Category; |
+using ntp_snippets::ContentSuggestion; |
+ |
+namespace offline_pages { |
+ |
+namespace { |
+ |
+const ntp_snippets::Category& ArticlesCategory() { |
+ static ntp_snippets::Category articles = |
+ Category::FromKnownCategory(ntp_snippets::KnownCategories::ARTICLES); |
+ return articles; |
+} |
+ |
+ClientId CreateClientIDFromSuggestionId(const ContentSuggestion::ID& id) { |
+ return ClientId(kSuggestedArticlesNamespace, id.id_within_category()); |
+} |
+ |
+} // namespace |
+ |
+SuggestedArticlesObserver::SuggestedArticlesObserver( |
+ ntp_snippets::ContentSuggestionsService* content_suggestions_service, |
+ PrefetchService* prefetch_service) |
+ : content_suggestions_service_(content_suggestions_service), |
+ prefetch_service_(prefetch_service) { |
+ // The content suggestions service can be |nullptr| in tests. |
+ if (content_suggestions_service_) |
+ content_suggestions_service_->AddObserver(this); |
+} |
+ |
+SuggestedArticlesObserver::~SuggestedArticlesObserver() = default; |
+ |
+void SuggestedArticlesObserver::OnNewSuggestions(Category category) { |
+ // TODO(dewittj): Change this to check whether a given category is not |
+ // a _remote_ category. |
+ if (category != ArticlesCategory() || |
+ category_status_ != ntp_snippets::CategoryStatus::AVAILABLE) { |
+ return; |
+ } |
+ |
+ const std::vector<ContentSuggestion>& suggestions = |
+ test_articles_ ? *test_articles_ |
+ : content_suggestions_service_->GetSuggestionsForCategory( |
+ ArticlesCategory()); |
+ if (suggestions.empty()) |
+ return; |
+ |
+ std::vector<PrefetchDispatcher::PrefetchURL> prefetch_urls; |
+ for (const ContentSuggestion& suggestion : suggestions) { |
+ prefetch_urls.push_back( |
+ {CreateClientIDFromSuggestionId(suggestion.id()), suggestion.url()}); |
+ } |
+ |
+ prefetch_service_->GetDispatcher()->AddCandidatePrefetchURLs(prefetch_urls); |
+} |
+ |
+void SuggestedArticlesObserver::OnCategoryStatusChanged( |
+ Category category, |
+ ntp_snippets::CategoryStatus new_status) { |
+ if (category != ArticlesCategory() || category_status_ == new_status) |
+ return; |
+ |
+ category_status_ = new_status; |
+ |
+ if (category_status_ == |
+ ntp_snippets::CategoryStatus::CATEGORY_EXPLICITLY_DISABLED || |
+ category_status_ == |
+ ntp_snippets::CategoryStatus::ALL_SUGGESTIONS_EXPLICITLY_DISABLED) { |
+ prefetch_service_->GetDispatcher()->RemoveAllUnprocessedPrefetchURLs( |
+ kSuggestedArticlesNamespace); |
+ } |
+} |
+ |
+void SuggestedArticlesObserver::OnSuggestionInvalidated( |
+ const ContentSuggestion::ID& suggestion_id) { |
+ prefetch_service_->GetDispatcher()->RemovePrefetchURLsByClientId( |
+ CreateClientIDFromSuggestionId(suggestion_id)); |
+} |
+ |
+void SuggestedArticlesObserver::OnFullRefreshRequired() { |
+ prefetch_service_->GetDispatcher()->RemoveAllUnprocessedPrefetchURLs( |
+ kSuggestedArticlesNamespace); |
+ OnNewSuggestions(ArticlesCategory()); |
+} |
+ |
+void SuggestedArticlesObserver::ContentSuggestionsServiceShutdown() { |
+ // No need to do anything here, we will just stop getting events. |
+} |
+ |
+std::vector<ntp_snippets::ContentSuggestion>* |
+SuggestedArticlesObserver::GetTestingArticles() { |
+ if (!test_articles_) { |
+ test_articles_ = |
+ base::MakeUnique<std::vector<ntp_snippets::ContentSuggestion>>(); |
+ } |
+ return test_articles_.get(); |
+} |
+ |
+} // namespace offline_pages |