Fetch ARC Kiosk app name and icon from Android side.

chrome/browser/chromeos/app_mode/arc/arc_kiosk_app_data.cc

+// Copyright 2017 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/chromeos/app_mode/arc/arc_kiosk_app_data.h"
+
+#include <utility>
+
+#include "base/files/file_util.h"
+#include "base/path_service.h"
+#include "base/task_scheduler/post_task.h"
+#include "base/threading/sequenced_worker_pool.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/chromeos/app_mode/arc/arc_kiosk_app_manager.h"
+#include "chrome/common/chrome_paths.h"
+#include "components/prefs/pref_service.h"
+#include "components/prefs/scoped_user_pref_update.h"
+#include "content/public/browser/browser_thread.h"
+#include "ui/gfx/codec/png_codec.h"
+
+namespace chromeos {
+
+namespace {
+// Keys for local state data.
+constexpr char kKeyName[] = "name";
+constexpr char kKeyIcon[] = "icon";
+
+constexpr char kIconFileExtension[] = ".png";
+constexpr char kIconCacheDir[] = "arc-kiosk/icon";
+
+// Save |raw_icon| for given |app_id|.
+void SaveIconToLocalOnBlockingPool(
+    const base::FilePath& icon_path,
+    scoped_refptr<base::RefCountedString> raw_icon) {
+  DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
+
+  base::FilePath dir = icon_path.DirName();
+  if (!base::PathExists(dir))
+    CHECK(base::CreateDirectory(dir));
+
+  CHECK_EQ(
+      static_cast<int>(raw_icon->size()),
+      base::WriteFile(icon_path, raw_icon->data().c_str(), raw_icon->size()));
+}
+
+}  // namespace
+
+ArcKioskAppData::ArcKioskAppData(const std::string& app_id,
+                                 const AccountId& account_id,
+                                 const std::string& name)
+    : app_id_(app_id), account_id_(account_id), name_(name) {}
+
+ArcKioskAppData::~ArcKioskAppData() = default;
+
+bool ArcKioskAppData::operator==(const std::string& app_id) const {
+  return this->app_id_ == app_id;
+}
+
+bool ArcKioskAppData::LoadFromCache() {
+  const std::string app_key =
+      std::string(ArcKioskAppManager::kKeyApps) + '.' + app_id_;
+  const std::string name_key = app_key + '.' + kKeyName;
+  const std::string icon_path_key = app_key + '.' + kKeyIcon;
+
+  PrefService* local_state = g_browser_process->local_state();
+  const base::DictionaryValue* dict =
+      local_state->GetDictionary(ArcKioskAppManager::kArcKioskDictionaryName);
+
+  std::string icon_path_string;
+  if (!dict->GetString(name_key, &name_) ||
+      !dict->GetString(icon_path_key, &icon_path_string)) {
+    return false;
+  }
+  icon_path_ = base::FilePath(icon_path_string);
+
+  // KioskAppIconLoader deletes itself when done.
+  (new KioskAppIconLoader(AsWeakPtr(), icon_path_))->Start();
+  return true;
+}
+
+void ArcKioskAppData::SetCache(const std::string& name,
+                               const gfx::ImageSkia& icon) {
+  DCHECK(!name.empty());
+  DCHECK(!icon.isNull());
+  name_ = name;
+  icon_ = icon;
+
+  std::vector<unsigned char> image_data;
+  CHECK(gfx::PNGCodec::EncodeBGRASkBitmap(*icon.bitmap(), false, &image_data));
+  scoped_refptr<base::RefCountedString> raw_icon(new base::RefCountedString);
+  raw_icon->data().assign(image_data.begin(), image_data.end());
+
+  base::FilePath user_data_dir;
+  CHECK(PathService::Get(chrome::DIR_USER_DATA, &user_data_dir));
+  base::FilePath cache_dir = user_data_dir.AppendASCII(kIconCacheDir);
+  base::FilePath icon_path =
+      cache_dir.AppendASCII(app_id_).AddExtension(kIconFileExtension);
+  content::BrowserThread::GetBlockingPool()->PostTask(
+      FROM_HERE,
+      base::Bind(&SaveIconToLocalOnBlockingPool, icon_path, raw_icon));
+
+  icon_path_ = icon_path;
+
+  const std::string app_key =
+      std::string(ArcKioskAppManager::kKeyApps) + '.' + app_id_;
+  const std::string name_key = app_key + '.' + kKeyName;
+  const std::string icon_path_key = app_key + '.' + kKeyIcon;
+
+  PrefService* local_state = g_browser_process->local_state();
+  DictionaryPrefUpdate dict_update(local_state,
+                                   ArcKioskAppManager::kArcKioskDictionaryName);
+  dict_update->SetString(name_key, name);
+  dict_update->SetString(icon_path_key, icon_path.value());
+}
+
+void ArcKioskAppData::ClearCache() {
+  PrefService* local_state = g_browser_process->local_state();
+
+  DictionaryPrefUpdate dict_update(local_state,
+                                   ArcKioskAppManager::kArcKioskDictionaryName);
+
+  std::string app_key =
+      std::string(ArcKioskAppManager::kKeyApps) + '.' + app_id_;
+  dict_update->Remove(app_key, NULL);
+
+  if (!icon_path_.empty()) {
+    base::PostTaskWithTraits(
+        FROM_HERE,
+        base::TaskTraits().MayBlock().WithPriority(
+            base::TaskPriority::BACKGROUND),
+        base::Bind(base::IgnoreResult(&base::DeleteFile), icon_path_, false));
+  }
+}
+
+void ArcKioskAppData::OnIconLoadSuccess(const gfx::ImageSkia& icon) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  icon_ = icon;
+}
+
+void ArcKioskAppData::OnIconLoadFailure() {
+  LOG(ERROR) << "Icon Load Failure";
+  // Do nothing
+}
+
+}  // namespace chromeos