[Merge-M54] arc: Add support of default and OEM apps.

chrome/browser/ui/app_list/arc/arc_default_app_list.cc

+// 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 "chrome/browser/ui/app_list/arc/arc_default_app_list.h"
+
+#include "base/files/file_enumerator.h"
+#include "base/json/json_file_value_serializer.h"
+#include "base/path_service.h"
+#include "base/task_runner_util.h"
+#include "chrome/browser/ui/app_list/arc/arc_app_list_prefs.h"
+#include "chrome/common/chrome_paths.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace {
+
+const char kActivity[] = "activity";
+const char kAppPath[] = "app_path";
+const char kName[] = "name";
+const char kOem[] = "oem";
+const char kPackageName[] = "package_name";
+
+// Sub-directory wher Arc apps forward declarations are stored.
+const base::FilePath::CharType kArcDirectory[] = FILE_PATH_LITERAL("arc");
+const base::FilePath::CharType kArcTestDirectory[] =
+    FILE_PATH_LITERAL("arc_default_apps");
+
+bool use_test_apps_directory = false;
+
+std::unique_ptr<ArcDefaultAppList::AppInfoMap>
+ReadAppsFromFileThread() {
+  DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
+
+  std::unique_ptr<ArcDefaultAppList::AppInfoMap> apps(
+      new ArcDefaultAppList::AppInfoMap);
+
+  base::FilePath base_path;
+  if (!use_test_apps_directory) {
+    if (!base::PathService::Get(chrome::DIR_STANDALONE_EXTERNAL_EXTENSIONS,
+                                &base_path))
+      return apps;
+    base_path = base_path.Append(kArcDirectory);
+  } else {
+    if (!base::PathService::Get(chrome::DIR_TEST_DATA, &base_path))
+      return apps;
+    base_path = base_path.AppendASCII(kArcTestDirectory);
+  }
+
+  base::FilePath::StringType extension(".json");
+  base::FileEnumerator json_files(
+      base_path,
+      false,  // Recursive.
+      base::FileEnumerator::FILES);
+
+  for (base::FilePath file = json_files.Next(); !file.empty();
+      file = json_files.Next()) {
+
+    if (file.MatchesExtension(extension)) {
+      JSONFileValueDeserializer deserializer(file);
+      std::string error_msg;
+      std::unique_ptr<base::Value> app_info =
+          deserializer.Deserialize(nullptr, &error_msg);
+      if (!app_info) {
+        VLOG(2) << "Unable to deserialize json data: " << error_msg
+                << " in file " << file.value() << ".";
+        continue;
+      }
+
+      std::unique_ptr<base::DictionaryValue> app_info_dictionary =
+          base::DictionaryValue::From(std::move(app_info));
+      CHECK(app_info_dictionary);
+
+      std::string name;
+      std::string package_name;
+      std::string activity;
+      std::string app_path;
+      bool oem = false;
+
+      app_info_dictionary->GetString(kName, &name);
+      app_info_dictionary->GetString(kPackageName, &package_name);
+      app_info_dictionary->GetString(kActivity, &activity);
+      app_info_dictionary->GetString(kAppPath, &app_path);
+      app_info_dictionary->GetBoolean(kOem, &oem);
+
+      if (name.empty() ||
+          package_name.empty() ||
+          activity.empty() ||
+          app_path.empty()) {
+        VLOG(2) << "Arc app declaration is incomplete in file "
+                << file.value() << ".";
+        continue;
+      }
+
+      const std::string app_id = ArcAppListPrefs::GetAppId(
+          package_name, activity);
+      std::unique_ptr<ArcDefaultAppList::AppInfo> app(
+          new ArcDefaultAppList::AppInfo(name,
+                                         package_name,
+                                         activity,
+                                         oem,
+                                         base_path.Append(app_path)));
+      apps.get()->insert(
+          std::pair<std::string,
+                    std::unique_ptr<ArcDefaultAppList::AppInfo>>(
+                        app_id, std::move(app)));
+    } else {
+      DVLOG(1) << "Not considering: " << file.LossyDisplayName()
+               << " (does not have a .json extension)";
+    }
+  }
+
+  return apps;
+}
+
+}  // namespace
+
+// static
+void ArcDefaultAppList::UseTestAppsDirectory() {
+  use_test_apps_directory = true;
+}
+
+ArcDefaultAppList::ArcDefaultAppList(Delegate* delegate)
+    : delegate_(delegate), weak_ptr_factory_(this) {
+  CHECK(delegate_);
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+
+  // Once ready OnAppsReady is called.
+  base::PostTaskAndReplyWithResult(
+      content::BrowserThread::GetBlockingPool(), FROM_HERE,
+      base::Bind(&ReadAppsFromFileThread),
+      base::Bind(&ArcDefaultAppList::OnAppsReady,
+          weak_ptr_factory_.GetWeakPtr()));
+}
+
+ArcDefaultAppList::~ArcDefaultAppList() {}
+
+void ArcDefaultAppList::OnAppsReady(std::unique_ptr<AppInfoMap> apps) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+
+  apps_.swap(*apps.get());
+
+  // Initially consider packages are installed.
+  for (const auto& app : apps_)
+    packages_[app.second->package_name] = false;
+
+  delegate_->OnDefaultAppsReady();
+}
+
+const ArcDefaultAppList::AppInfo* ArcDefaultAppList::GetApp(
+    const std::string& app_id) const {
+  const auto it = apps_.find(app_id);
+  if (it == apps_.end())
+    return nullptr;
+  // Check if its package was uninstalled.
+  const auto it_package = packages_.find(it->second->package_name);
+  DCHECK(it_package != packages_.end());
+  if (it_package->second)
+    return nullptr;
+  return it->second.get();
+}
+
+bool ArcDefaultAppList::HasApp(const std::string& app_id) const {
+  return GetApp(app_id) != nullptr;
+}
+
+bool ArcDefaultAppList::HasPackage(const std::string& package_name) const {
+  return packages_.count(package_name);
+}
+
+void ArcDefaultAppList::MaybeMarkPackageUninstalled(
+    const std::string& package_name, bool uninstalled) {
+  auto it = packages_.find(package_name);
+  if (it == packages_.end())
+    return;
+  it->second = uninstalled;
+}
+
+ArcDefaultAppList::AppInfo::AppInfo(const std::string& name,
+                                    const std::string& package_name,
+                                    const std::string& activity,
+                                    bool oem,
+                                    const base::FilePath app_path)
+    : name(name),
+      package_name(package_name),
+      activity(activity),
+      oem(oem),
+      app_path(app_path) {}
+
+ArcDefaultAppList::AppInfo::~AppInfo() {}