Index: extensions/browser/api/lock_screen_data/data_item.h |
diff --git a/extensions/browser/api/lock_screen_data/data_item.h b/extensions/browser/api/lock_screen_data/data_item.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..482e8c536aace8ad53e78d7236226d163f036122 |
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+++ b/extensions/browser/api/lock_screen_data/data_item.h |
@@ -0,0 +1,110 @@ |
+// 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. |
+ |
+#ifndef EXTENSIONS_BROWSER_API_LOCK_SCREEN_DATA_DATA_ITEM_H_ |
+#define EXTENSIONS_BROWSER_API_LOCK_SCREEN_DATA_DATA_ITEM_H_ |
+ |
+#include <memory> |
+#include <string> |
+#include <vector> |
+ |
+#include "base/callback.h" |
+#include "base/files/file_path.h" |
+#include "base/memory/ref_counted.h" |
+#include "base/memory/weak_ptr.h" |
+ |
+namespace base { |
+class DictionaryValue; |
+class SequencedTaskRunner; |
+class Value; |
+} |
+ |
+namespace extensions { |
+namespace lock_screen_data { |
+ |
+enum class OperationResult; |
+ |
+// Wrapper around a file backed lock screen data item. |
+class DataItem { |
+ public: |
+ using WriteCallback = base::Callback<void(OperationResult result)>; |
+ using ReadCallback = |
+ base::Callback<void(OperationResult result, |
+ std::unique_ptr<std::vector<char>> data)>; |
+ using DeleteCallback = base::Callback<void(OperationResult result)>; |
+ |
+ explicit DataItem(const std::string& id); |
+ virtual ~DataItem(); |
+ |
+ // Converts the data item to a dictionary value. |
+ std::unique_ptr<base::DictionaryValue> ToValue(); |
+ |
+ // Initializes the data item from a value - value is expected to be a |
+ // dictionary value, with id property set to this DataItem's id. |
+ // Returns whether the item was successfully initialized. |
+ bool InitFromValue(const base::Value& value); |
+ |
+ // Encrypts |data| with |crypto_key| and writes is to the file backing this |
+ // data item - it will fail id |backing_file_| is empty. |
+ // Note - callback will be used only if the operation cannot be finished |
+ // synchronously, in which case the method returns OperationResult::kPending. |
+ virtual OperationResult Write( |
rkc
2017/06/22 18:35:47
Why return a value at all? Why not just directly c
tbarzic
2017/06/26 22:21:42
Done.
|
+ const std::vector<char>& data, |
+ const std::string& crypto_key, |
+ const scoped_refptr<base::SequencedTaskRunner>& task_runner, |
+ const WriteCallback& callback); |
+ |
+ // Reads data from the backing file and decrypts it using |crypto_key|. |
+ // It will fail if |backing_file_| is empty. |
+ // Note - callback will be used only if the operation cannot be finished |
+ // synchronously, in which case the method returns OperationResult::kPending. |
+ virtual OperationResult Read( |
+ const std::string& crypto_key, |
+ const scoped_refptr<base::SequencedTaskRunner>& task_runner, |
+ const ReadCallback& callback); |
+ |
+ // Resets this data item, and deletes the backing file. |
+ // Note - callback will be used only if the operation cannot be finished |
+ // synchronously, in which case the method returns OperationResult::kPending. |
+ virtual OperationResult Delete( |
+ const scoped_refptr<base::SequencedTaskRunner>& task_runner, |
+ const DeleteCallback& callback); |
+ |
+ const std::string& id() const { return id_; } |
+ |
+ const base::FilePath& backing_file() const { return backing_file_; } |
+ |
+ void set_backing_file(const base::FilePath& backing_file) { |
+ backing_file_ = backing_file; |
+ } |
+ |
+ private: |
+ // Internal callback for write operation - wraps |callback| to ensure |
+ // |callback| is not run after |this| has been destroyed. |
+ void OnWriteDone(const WriteCallback& callback, |
+ std::unique_ptr<OperationResult> result); |
+ |
+ // Internal callback for read operation - wraps |callback| to ensure |
+ // |callback| is not run after |this| has been destroyed. |
+ void OnReadDone(const ReadCallback& callback, |
+ std::unique_ptr<OperationResult> result, |
+ std::unique_ptr<std::vector<char>> data); |
+ |
+ // Internal callback for delete operation - wraps |callback| to ensure |
+ // |callback| is not run after |this| has been destroyed. |
+ void OnDeleteDone(const DeleteCallback& callback, |
+ std::unique_ptr<OperationResult> result); |
+ |
+ std::string id_; |
+ base::FilePath backing_file_; |
+ |
+ base::WeakPtrFactory<DataItem> weak_ptr_factory_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(DataItem); |
+}; |
+ |
+} // namespace lock_screen_data |
+} // namespace extensions |
+ |
+#endif // EXTENSIONS_BROWSER_API_LOCK_SCREEN_DATA_DATA_ITEM_H_ |