File: phishing_model_setter_impl.cc

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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "components/safe_browsing/content/renderer/phishing_classifier/phishing_model_setter_impl.h"

#include "components/safe_browsing/content/renderer/phishing_classifier/scorer.h"
#include "third_party/blink/public/common/associated_interfaces/associated_interface_registry.h"

namespace safe_browsing {

std::unique_ptr<Scorer> CreateFlatBufferModelScorer(
    base::ReadOnlySharedMemoryRegion flatbuffer_region,
    base::File tflite_visual_model) {
  std::unique_ptr<Scorer> scorer;
  // An invalid region means we should disable client-side phishing detection.
  if (flatbuffer_region.IsValid()) {
    scorer = safe_browsing::Scorer::Create(std::move(flatbuffer_region),
                                           std::move(tflite_visual_model));
  }
  return scorer;
}

std::unique_ptr<Scorer> CreateScorerWithImageEmbeddingModel(
    base::ReadOnlySharedMemoryRegion flatbuffer_region,
    base::File tflite_visual_model,
    base::File image_embedding_model) {
  std::unique_ptr<Scorer> scorer;
  // An invalid region means we should disable client-side phishing detection.
  if (flatbuffer_region.IsValid()) {
    scorer = safe_browsing::Scorer::CreateScorerWithImageEmbeddingModel(
        std::move(flatbuffer_region), std::move(tflite_visual_model),
        std::move(image_embedding_model));
  }
  return scorer;
}

PhishingModelSetterImpl::PhishingModelSetterImpl() = default;
PhishingModelSetterImpl::~PhishingModelSetterImpl() = default;

void PhishingModelSetterImpl::RegisterMojoInterfaces(
    blink::AssociatedInterfaceRegistry* associated_interfaces) {
  associated_interfaces->AddInterface<mojom::PhishingModelSetter>(
      base::BindRepeating(&PhishingModelSetterImpl::OnRendererAssociatedRequest,
                          base::Unretained(this)));
}

void PhishingModelSetterImpl::UnregisterMojoInterfaces(
    blink::AssociatedInterfaceRegistry* associated_interfaces) {
  associated_interfaces->RemoveInterface(mojom::PhishingModelSetter::Name_);
}

void PhishingModelSetterImpl::SetImageEmbeddingAndPhishingFlatBufferModel(
    base::ReadOnlySharedMemoryRegion flatbuffer_region,
    base::File tflite_visual_model,
    base::File image_embedding_model) {
  std::unique_ptr<Scorer> scorer = CreateScorerWithImageEmbeddingModel(
      std::move(flatbuffer_region), std::move(tflite_visual_model),
      std::move(image_embedding_model));

  if (!scorer) {
    return;
  }
  ScorerStorage::GetInstance()->SetScorer(std::move(scorer));

  if (observer_for_testing_.is_bound()) {
    observer_for_testing_->PhishingModelUpdated();
  }
}

void PhishingModelSetterImpl::SetPhishingFlatBufferModel(
    base::ReadOnlySharedMemoryRegion flatbuffer_region,
    base::File tflite_visual_model) {
  std::unique_ptr<Scorer> scorer = CreateFlatBufferModelScorer(
      std::move(flatbuffer_region), std::move(tflite_visual_model));
  if (!scorer) {
    return;
  }
  ScorerStorage::GetInstance()->SetScorer(std::move(scorer));

  if (observer_for_testing_.is_bound()) {
    observer_for_testing_->PhishingModelUpdated();
  }
}

void PhishingModelSetterImpl::AttachImageEmbeddingModel(
    base::File image_embedding_model) {
  Scorer* scorer = ScorerStorage::GetInstance()->GetScorer();

  if (!scorer) {
    return;
  }

  scorer->AttachImageEmbeddingModel(std::move(image_embedding_model));
}

void PhishingModelSetterImpl::ClearScorer() {
  ScorerStorage::GetInstance()->ClearScorer();
}

void PhishingModelSetterImpl::SetTestObserver(
    mojo::PendingRemote<mojom::PhishingModelSetterTestObserver> observer,
    SetTestObserverCallback callback) {
  if (observer_for_testing_.is_bound())
    observer_for_testing_.reset();
  observer_for_testing_.Bind(std::move(observer));
  std::move(callback).Run();
}

void PhishingModelSetterImpl::OnRendererAssociatedRequest(
    mojo::PendingAssociatedReceiver<mojom::PhishingModelSetter> receiver) {
  receiver_.reset();
  receiver_.Bind(std::move(receiver));
}

}  // namespace safe_browsing