Index: components/translate/core/browser/ranker_model.cc |
diff --git a/components/translate/core/browser/ranker_model.cc b/components/translate/core/browser/ranker_model.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..de907f0a21d694752a38660f3561fefa5f11be41 |
--- /dev/null |
+++ b/components/translate/core/browser/ranker_model.cc |
@@ -0,0 +1,54 @@ |
+// Copyright 2016 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/translate/core/browser/ranker_model.h" |
+ |
+#include "base/memory/ptr_util.h" |
+#include "base/time/time.h" |
+#include "components/translate/core/browser/proto/ranker_model.pb.h" |
+ |
+namespace chrome_intelligence { |
+ |
+RankerModel::RankerModel() : proto_(base::MakeUnique<RankerModelProto>()) {} |
+ |
+RankerModel::~RankerModel() {} |
+ |
+// static |
+std::unique_ptr<RankerModel> RankerModel::FromString(const std::string& data) { |
+ auto model = base::MakeUnique<RankerModel>(); |
+ if (!model->mutable_proto()->ParseFromString(data)) |
+ return nullptr; |
+ return model; |
+} |
+ |
+bool RankerModel::IsExpired() const { |
+ if (!proto().has_metadata()) |
+ return true; |
+ |
+ const auto& metadata = proto().metadata(); |
+ |
+ // If the age of the model cannot be determined, presume it to be expired. |
+ if (!metadata.has_last_modified_sec()) |
+ return true; |
+ |
+ // If the model has no set cache duration, then it never expires. |
+ if (!metadata.has_cache_duration_sec() || metadata.cache_duration_sec() == 0) |
+ return false; |
+ |
+ // Otherwise, a model is expired if its age exceeds the cache duration. |
+ base::Time last_modified = |
+ base::Time() + base::TimeDelta::FromSeconds(metadata.last_modified_sec()); |
+ base::TimeDelta age = base::Time::Now() - last_modified; |
+ return age > base::TimeDelta::FromSeconds(metadata.cache_duration_sec()); |
+} |
+ |
+const std::string& RankerModel::GetSourceURL() const { |
+ return proto_->metadata().source(); |
+} |
+ |
+std::string RankerModel::SerializeAsString() const { |
+ return proto_->SerializeAsString(); |
+} |
+ |
+} // namespace chrome_intelligence |