Index: chrome/browser/android/offline_pages/suggested_articles_observer.cc |
diff --git a/chrome/browser/android/offline_pages/suggested_articles_observer.cc b/chrome/browser/android/offline_pages/suggested_articles_observer.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..a2e840e0938266590b19eb13a78d817187e10b4b |
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+++ b/chrome/browser/android/offline_pages/suggested_articles_observer.cc |
@@ -0,0 +1,145 @@ |
+// 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 "chrome/browser/android/offline_pages/suggested_articles_observer.h" |
+ |
+#include <unordered_set> |
+ |
+#include "base/memory/ptr_util.h" |
+#include "base/threading/thread_task_runner_handle.h" |
+#include "chrome/browser/android/offline_pages/prefetch_service_factory.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/prefetch/prefetch_service_impl.h" |
+ |
+using ntp_snippets::Category; |
+using ntp_snippets::ContentSuggestion; |
+ |
+namespace offline_pages { |
+ |
+namespace { |
+ |
+int kOfflinePageSuggestedArticlesObserverUserDataKey; |
+ |
+ClientId CreateClientIDFromSuggestionId(const ContentSuggestion::ID& id) { |
+ return ClientId(kSuggestedArticlesNamespace, id.id_within_category()); |
+} |
+ |
+// The default delegate that contains external dependencies for the Offline Page |
+// Suggestions Observer. This is unused in tests, which implement their own |
+// Delegate. |
+class DefaultDelegate : public SuggestedArticlesObserver::Delegate { |
+ public: |
+ explicit DefaultDelegate(ntp_snippets::ContentSuggestionsService* service); |
+ ~DefaultDelegate() override = default; |
+ |
+ const std::vector<ContentSuggestion>& GetSuggestions( |
+ const Category& category) override; |
+ PrefetchService* GetPrefetchService( |
+ content::BrowserContext* context) override; |
+ |
+ private: |
+ ntp_snippets::ContentSuggestionsService* service_; |
+}; |
+ |
+DefaultDelegate::DefaultDelegate( |
+ ntp_snippets::ContentSuggestionsService* service) |
+ : service_(service) {} |
+ |
+const std::vector<ContentSuggestion>& DefaultDelegate::GetSuggestions( |
+ const Category& category) { |
+ return service_->GetSuggestionsForCategory(category); |
+} |
+ |
+PrefetchService* DefaultDelegate::GetPrefetchService( |
+ content::BrowserContext* context) { |
+ return PrefetchServiceFactory::GetForBrowserContext(context); |
+} |
+ |
+} // namespace |
+ |
+// static |
+void SuggestedArticlesObserver::ObserveContentSuggestionsService( |
+ content::BrowserContext* browser_context, |
+ ntp_snippets::ContentSuggestionsService* service) { |
+ if (!offline_pages::IsPrefetchingOfflinePagesEnabled()) |
+ return; |
+ |
+ SuggestedArticlesObserver* suggestions_observer = |
+ new SuggestedArticlesObserver(browser_context, |
+ base::MakeUnique<DefaultDelegate>(service)); |
+ service->AddObserver(suggestions_observer); |
+ service->SetUserData( |
+ &kOfflinePageSuggestedArticlesObserverUserDataKey, |
+ base::WrapUnique<base::SupportsUserData::Data>(suggestions_observer)); |
carlosk
2017/04/18 20:17:23
nit: this looks worse than what it was before (esp
dewittj
2017/04/21 21:59:04
Done.
|
+} |
+ |
+SuggestedArticlesObserver::SuggestedArticlesObserver( |
+ content::BrowserContext* browser_context, |
+ std::unique_ptr<Delegate> delegate) |
+ : browser_context_(browser_context), |
+ category_( |
+ Category::FromKnownCategory(ntp_snippets::KnownCategories::ARTICLES)), |
+ delegate_(std::move(delegate)) {} |
+ |
+SuggestedArticlesObserver::~SuggestedArticlesObserver() = default; |
+ |
+void SuggestedArticlesObserver::OnNewSuggestions(Category category) { |
+ if (category != category_ || |
+ category_status_ != ntp_snippets::CategoryStatus::AVAILABLE) { |
+ return; |
+ } |
+ |
+ const std::vector<ContentSuggestion>& suggestions = |
+ delegate_->GetSuggestions(category_); |
+ if (suggestions.empty()) |
+ return; |
+ |
+ std::vector<PrefetchService::PrefetchURL> prefetch_urls; |
+ for (const ContentSuggestion& suggestion : suggestions) { |
+ prefetch_urls.push_back( |
+ {CreateClientIDFromSuggestionId(suggestion.id()), suggestion.url()}); |
+ } |
+ |
+ PrefetchService* service = delegate_->GetPrefetchService(browser_context_); |
+ service->AddCandidatePrefetchURLs(prefetch_urls); |
+} |
+ |
+void SuggestedArticlesObserver::OnCategoryStatusChanged( |
+ Category category, |
+ ntp_snippets::CategoryStatus new_status) { |
+ if (category != category_ || 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) { |
+ PrefetchService* service = delegate_->GetPrefetchService(browser_context_); |
+ service->RemoveAllUnprocessedPrefetchURLs(kSuggestedArticlesNamespace); |
+ } |
+} |
+ |
+void SuggestedArticlesObserver::OnSuggestionInvalidated( |
+ const ContentSuggestion::ID& suggestion_id) { |
+ PrefetchService* service = delegate_->GetPrefetchService(browser_context_); |
+ service->RemovePrefetchURLsByClientId( |
+ CreateClientIDFromSuggestionId(suggestion_id)); |
+} |
+ |
+void SuggestedArticlesObserver::OnFullRefreshRequired() { |
+ PrefetchService* service = delegate_->GetPrefetchService(browser_context_); |
+ service->RemoveAllUnprocessedPrefetchURLs(kSuggestedArticlesNamespace); |
+ OnNewSuggestions(category_); |
+} |
+ |
+void SuggestedArticlesObserver::ContentSuggestionsServiceShutdown() { |
+ // No need to do anything here, we will just stop getting events. |
+} |
+ |
+} // namespace offline_pages |