Define the Settings interface for a CrashReportDatabase and provide a Mac implementation.

client/settings.h

Index: client/settings.h
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+// Copyright 2015 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef CRASHPAD_CLIENT_SETTINGS_H_
+#define CRASHPAD_CLIENT_SETTINGS_H_
+
+#include <time.h>
+
+#include <string>
+
+#include "base/basictypes.h"
+
+namespace crashpad {
+
+//! \brief An interface for accessing and modifying the settings of a
+//!     CrashReportDatabase.
+//!
+//! This class cannot be instantiated directly, but rather an instance of it
+//! should be retrieved via CrashReportDatabase::GetSettings().
+class Settings {
+ public:
+  //! \brief Retrieves the immutable identifier for this client, which is used
+  //!     to locate all crash reports from a specific Crashpad database.
+  //!
+  //! This is automatically initialized when the database is created.
+  //!
+  //! \param[out] client_id The unique client identifier.
+  //!
+  //! \return On success, returns `true`, otherwise returns `false` with an
+  //!     error logged.
+  virtual bool GetClientID(std::string* client_id) = 0;
+
+  //! \brief Retrieves the user’s preference for submitting crash reports to a
+  //!     collection server.
+  //!
+  //! The default value is `false`.
+  //!
+  //! \param[out] enabled Whether crash reports should be uploaded.
+  //!
+  //! \return On success, returns `true`, otherwise returns `false` with an
+  //!     error logged.
+  virtual bool GetUploadsEnabled(bool* enabled) = 0;
+
+  //! \brief Sets the user’s preference for submitting crash reports to a
+  //!     collection server.
+  //!
+  //! \param[in] enabled Whether crash reports should be uploaded.
+  //!
+  //! \return On success, returns `true`, otherwise returns `false` with an
+  //!     error logged.
+  virtual bool SetUploadsEnabled(bool enabled) = 0;
+
+  //! \brief Retrieves the last time at which a report was attempted to be
+  //!     uploaded.
+  //!
+  //! The default value is `0` if it has never been set before.
+  //!
+  //! \param[out] time The last time at which a report was uploaded.
+  //!
+  //! \return On success, returns `true`, otherwise returns `false` with an
+  //!     error logged.
+  virtual bool GetLastUploadAttemptTime(time_t* time) = 0;
+
+  //! \brief Sets the last time at which a report was attempted to be uploaded.
+  //!
+  //! This is only meant to be used internally by the CrashReportDatabase.
+  //!
+  //! \param[in] time The last time at which a report was uploaded.
+  //!
+  //! \return On success, returns `true`, otherwise returns `false` with an
+  //!     error logged.
+  virtual bool SetLastUploadAttemptTime(time_t time) = 0;
+
+ protected:
+  Settings() {}
+  virtual ~Settings() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(Settings);
+};
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_CLIENT_SETTINGS_H_