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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "components/translate/core/browser/ranker_model.h" |
| 6 |
| 7 #include "base/memory/ptr_util.h" |
| 8 #include "base/time/time.h" |
| 9 #include "components/translate/core/browser/proto/ranker_model.pb.h" |
| 10 |
| 11 namespace chrome_intelligence { |
| 12 |
| 13 RankerModel::RankerModel() : proto_(base::MakeUnique<RankerModelProto>()) {} |
| 14 |
| 15 RankerModel::~RankerModel() {} |
| 16 |
| 17 // static |
| 18 std::unique_ptr<RankerModel> RankerModel::FromString(const std::string& data) { |
| 19 auto model = base::MakeUnique<RankerModel>(); |
| 20 if (!model->mutable_proto()->ParseFromString(data)) |
| 21 return nullptr; |
| 22 return model; |
| 23 } |
| 24 |
| 25 bool RankerModel::IsExpired() const { |
| 26 if (!proto().has_metadata()) |
| 27 return true; |
| 28 |
| 29 const auto& metadata = proto().metadata(); |
| 30 |
| 31 // If the age of the model cannot be determined, presume it to be expired. |
| 32 if (!metadata.has_last_modified_sec()) |
| 33 return true; |
| 34 |
| 35 // If the model has no set cache duration, then it never expires. |
| 36 if (!metadata.has_cache_duration_sec() || metadata.cache_duration_sec() == 0) |
| 37 return false; |
| 38 |
| 39 // Otherwise, a model is expired if its age exceeds the cache duration. |
| 40 base::Time last_modified = |
| 41 base::Time() + base::TimeDelta::FromSeconds(metadata.last_modified_sec()); |
| 42 base::TimeDelta age = base::Time::Now() - last_modified; |
| 43 return age > base::TimeDelta::FromSeconds(metadata.cache_duration_sec()); |
| 44 } |
| 45 |
| 46 const std::string& RankerModel::GetSourceURL() const { |
| 47 return proto_->metadata().source(); |
| 48 } |
| 49 |
| 50 std::string RankerModel::SerializeAsString() const { |
| 51 return proto_->SerializeAsString(); |
| 52 } |
| 53 |
| 54 } // namespace chrome_intelligence |
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