[local-search-service] Implement LocalSearchServiceProvider for LSS

Implements LocalSearchServiceProvider and related classes for LSS.

Design doc: go/lss-sandboxing
Implementation plan: go/lss-sandboxing-impl

Bug: 1137560
Change-Id: I46b43dc5ac9453e3d6da8eceb24293aa19bb3d50
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2556888Reviewed-by: Jia Meng <jiameng@chromium.org>
Commit-Queue: Thanh Nguyen <thanhdng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#830909}

chrome/browser/BUILD.gn

-# Copyright 2014 The Chromium Authors.All rights reserved.
+# Copyright 2014 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.
 
@@ -2378,6 +2378,7 @@ static_library("browser") {
       "//chromeos/components/help_app_ui",
       "//chromeos/components/help_app_ui:mojo_bindings",
       "//chromeos/components/local_search_service",
+      "//chromeos/components/local_search_service/public/cpp:cpp",
       "//chromeos/components/local_search_service/public/mojom",
       "//chromeos/components/media_app_ui",
       "//chromeos/components/media_app_ui:mojo_bindings",

chromeos/components/local_search_service/BUILD.gn

@@ -53,6 +53,21 @@ source_set("local_search_service") {
   ]
 }
 
+source_set("local_search_service_provider") {
+  sources = [
+    "local_search_service_provider_for_testing.cc",
+    "local_search_service_provider_for_testing.h",
+    "oop_local_search_service_provider.cc",
+    "oop_local_search_service_provider.h",
+  ]
+
+  deps = [
+    "//chromeos/components/local_search_service:local_search_service",
+    "//chromeos/components/local_search_service/public/cpp:cpp",
+    "//content/public/browser:browser",
+  ]
+}
+
 source_set("local_search_service_proxy") {
   sources = [
     "index_sync_proxy.cc",
@@ -99,6 +114,7 @@ source_set("unit_tests") {
     "inverted_index_search_unittest.cc",
     "inverted_index_unittest.cc",
     "linear_map_search_unittest.cc",
+    "local_search_service_provider_unittest.cc",
     "local_search_service_sync_proxy_unittest.cc",
     "local_search_service_sync_unittest.cc",
     "local_search_service_unittest.cc",
@@ -109,6 +125,7 @@ source_set("unit_tests") {
 
   deps = [
     ":local_search_service",
+    ":local_search_service_provider",
     ":local_search_service_proxy",
     ":test_support",
     "//base/test:test_support",

chromeos/components/local_search_service/local_search_service_provider_for_testing.cc

+// Copyright 2020 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 "chromeos/components/local_search_service/local_search_service_provider_for_testing.h"
+
+#include <memory>
+
+namespace chromeos {
+namespace local_search_service {
+
+LocalSearchServiceProviderForTestting::LocalSearchServiceProviderForTestting() {
+  LocalSearchServiceProvider::Set(this);
+}
+
+LocalSearchServiceProviderForTestting::
+    ~LocalSearchServiceProviderForTestting() {
+  LocalSearchServiceProvider::Set(nullptr);
+}
+
+void LocalSearchServiceProviderForTestting::BindLocalSearchService(
+    mojo::PendingReceiver<mojom::LocalSearchService> receiver) {
+  service_ = std::make_unique<LocalSearchService>(std::move(receiver));
+}
+
+}  // namespace local_search_service
+}  // namespace chromeos

chromeos/components/local_search_service/local_search_service_provider_for_testing.h

+// Copyright 2020 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.
+
+#ifndef CHROMEOS_COMPONENTS_LOCAL_SEARCH_SERVICE_LOCAL_SEARCH_SERVICE_PROVIDER_FOR_TESTING_H_
+#define CHROMEOS_COMPONENTS_LOCAL_SEARCH_SERVICE_LOCAL_SEARCH_SERVICE_PROVIDER_FOR_TESTING_H_
+
+#include "chromeos/components/local_search_service/local_search_service.h"
+#include "chromeos/components/local_search_service/public/cpp/local_search_service_provider.h"
+
+namespace chromeos {
+namespace local_search_service {
+
+// An implementation that runs LocalSearchService in-process for testing
+// purpose.
+class LocalSearchServiceProviderForTestting
+    : public LocalSearchServiceProvider {
+ public:
+  LocalSearchServiceProviderForTestting();
+  ~LocalSearchServiceProviderForTestting() override;
+
+  // LocalSearchServiceProvider:
+  void BindLocalSearchService(
+      mojo::PendingReceiver<mojom::LocalSearchService> receiver) override;
+
+ private:
+  std::unique_ptr<LocalSearchService> service_;
+};
+
+}  // namespace local_search_service
+}  // namespace chromeos
+
+#endif  // CHROMEOS_COMPONENTS_LOCAL_SEARCH_SERVICE_LOCAL_SEARCH_SERVICE_PROVIDER_FOR_TESTING_H_

chromeos/components/local_search_service/local_search_service_provider_unittest.cc

+// Copyright 2020 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 "chromeos/components/local_search_service/local_search_service_provider_for_testing.h"
+
+#include <memory>
+
+#include "base/test/task_environment.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+namespace local_search_service {
+
+class LocalSearchServiceProviderTest : public testing::Test {
+ public:
+  void SetUp() override {
+    provider_ = std::make_unique<LocalSearchServiceProviderForTestting>();
+  }
+
+ protected:
+  std::unique_ptr<LocalSearchServiceProvider> provider_;
+  base::test::TaskEnvironment task_environment_{
+      base::test::TaskEnvironment::MainThreadType::DEFAULT,
+      base::test::TaskEnvironment::ThreadPoolExecutionMode::QUEUED};
+};
+
+TEST_F(LocalSearchServiceProviderTest, SetUpAndRun) {
+  auto* provider = LocalSearchServiceProvider::Get();
+  mojo::Remote<mojom::LocalSearchService> service;
+  provider->BindLocalSearchService(service.BindNewPipeAndPassReceiver());
+  mojo::Remote<mojom::Index> index_remote;
+
+  // BindIndex
+  bool callback_done = false;
+  std::string error = "";
+  service->BindIndex(IndexId::kCrosSettings, Backend::kLinearMap,
+                     index_remote.BindNewPipeAndPassReceiver(),
+                     mojo::NullRemote(),
+                     base::BindOnce(
+                         [](bool* callback_done, std::string* error,
+                            const base::Optional<std::string>& error_callback) {
+                           *callback_done = true;
+                           if (error_callback)
+                             *error = error_callback.value();
+                         },
+                         &callback_done, &error));
+  task_environment_.RunUntilIdle();
+  ASSERT_TRUE(callback_done);
+  EXPECT_EQ(error, "");
+
+  // GetSize
+  callback_done = false;
+  uint32_t num_items = 0;
+  index_remote->GetSize(base::BindOnce(
+      [](bool* callback_done, uint32_t* num_items, uint64_t size) {
+        *callback_done = true;
+        *num_items = size;
+      },
+      &callback_done, &num_items));
+  task_environment_.RunUntilIdle();
+  ASSERT_TRUE(callback_done);
+  EXPECT_EQ(num_items, 0u);
+}
+
+}  // namespace local_search_service
+}  // namespace chromeos

chromeos/components/local_search_service/oop_local_search_service_provider.cc

+// Copyright 2020 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 "chromeos/components/local_search_service/oop_local_search_service_provider.h"
+#include "content/public/browser/service_process_host.h"
+
+namespace chromeos {
+namespace local_search_service {
+
+OopLocalSearchServiceProvider::OopLocalSearchServiceProvider() {
+  LocalSearchServiceProvider::Set(this);
+}
+
+OopLocalSearchServiceProvider::~OopLocalSearchServiceProvider() {
+  LocalSearchServiceProvider::Set(nullptr);
+}
+
+void OopLocalSearchServiceProvider::BindLocalSearchService(
+    mojo::PendingReceiver<mojom::LocalSearchService> receiver) {
+  content::ServiceProcessHost::Launch(
+      std::move(receiver), content::ServiceProcessHost::Options()
+                               .WithDisplayName("Local Search Service")
+                               .Pass());
+}
+
+}  // namespace local_search_service
+}  // namespace chromeos

chromeos/components/local_search_service/oop_local_search_service_provider.h

+// Copyright 2020 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.
+
+#ifndef CHROMEOS_COMPONENTS_LOCAL_SEARCH_SERVICE_OOP_LOCAL_SEARCH_SERVICE_PROVIDER_H_
+#define CHROMEOS_COMPONENTS_LOCAL_SEARCH_SERVICE_OOP_LOCAL_SEARCH_SERVICE_PROVIDER_H_
+
+#include "chromeos/components/local_search_service/public/cpp/local_search_service_provider.h"
+
+namespace chromeos {
+namespace local_search_service {
+
+// An implementation that runs LocalSearchService in the LSS service
+// process.
+class OopLocalSearchServiceProvider : public LocalSearchServiceProvider {
+ public:
+  OopLocalSearchServiceProvider();
+  ~OopLocalSearchServiceProvider() override;
+
+  // LocalSearchServiceProvider:
+  void BindLocalSearchService(
+      mojo::PendingReceiver<mojom::LocalSearchService> receiver) override;
+};
+
+}  // namespace local_search_service
+}  // namespace chromeos
+
+#endif  // CHROMEOS_COMPONENTS_LOCAL_SEARCH_SERVICE_OOP_LOCAL_SEARCH_SERVICE_PROVIDER_H_

chromeos/components/local_search_service/public/cpp/BUILD.gn

+# Copyright 2020 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.
+
+assert(is_chromeos, "Non-ChromeOS builds cannot depend on //chromeos")
+
+source_set("cpp") {
+  sources = [
+    "local_search_service_provider.cc",
+    "local_search_service_provider.h",
+  ]
+
+  deps = [
+    "//chromeos/components/local_search_service:local_search_service",
+    "//chromeos/components/local_search_service/public/mojom",
+  ]
+}

chromeos/components/local_search_service/public/cpp/local_search_service_provider.cc

+// Copyright 2020 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 "chromeos/components/local_search_service/public/cpp/local_search_service_provider.h"
+
+#include "chromeos/components/local_search_service/local_search_service.h"
+
+namespace chromeos {
+namespace local_search_service {
+
+namespace {
+
+LocalSearchServiceProvider* g_provider = nullptr;
+
+}  // namespace
+
+void LocalSearchServiceProvider::Set(LocalSearchServiceProvider* provider) {
+  g_provider = provider;
+}
+
+LocalSearchServiceProvider* LocalSearchServiceProvider::Get() {
+  return g_provider;
+}
+
+}  // namespace local_search_service
+}  // namespace chromeos

chromeos/components/local_search_service/public/cpp/local_search_service_provider.h

+// Copyright 2020 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.
+
+#ifndef CHROMEOS_COMPONENTS_LOCAL_SEARCH_SERVICE_PUBLIC_CPP_LOCAL_SEARCH_SERVICE_PROVIDER_H_
+#define CHROMEOS_COMPONENTS_LOCAL_SEARCH_SERVICE_PUBLIC_CPP_LOCAL_SEARCH_SERVICE_PROVIDER_H_
+
+#include "chromeos/components/local_search_service/public/mojom/local_search_service.mojom.h"
+#include "mojo/public/cpp/bindings/remote_set.h"
+
+namespace chromeos {
+namespace local_search_service {
+
+// LocalSearchServiceProvider creates an instance of LocalSearchService
+// and runs in LSS service process or in process (depending on the
+// implementation).
+class LocalSearchServiceProvider {
+ public:
+  virtual ~LocalSearchServiceProvider() {}
+
+  // Sets the global LocalSearchServiceProvider instance.
+  // Specifically, there will be a global |g_provider| in this class' .cpp file
+  // and in the anonymous namespace. The Set function will set |g_provider| to
+  // the input |provider|.
+  // This function must be called before the service is requested.
+  static void Set(LocalSearchServiceProvider* provider);
+  static LocalSearchServiceProvider* Get();
+
+  // Binds |receiver| to an instance of the LocalSearchService.
+  // Each call to this method will request a new instance of the service.
+  virtual void BindLocalSearchService(
+      mojo::PendingReceiver<mojom::LocalSearchService> receiver) = 0;
+};
+
+}  // namespace local_search_service
+}  // namespace chromeos
+
+#endif  // CHROMEOS_COMPONENTS_LOCAL_SEARCH_SERVICE_PUBLIC_CPP_LOCAL_SEARCH_SERVICE_PROVIDER_H_