Initial chassis state management code

This is just the basics to get the generated code
compiling and to verify the basic dbus interfaces.

Change-Id: I335964da456d8173e2ce792c6614770da43303b4
Signed-off-by: Andrew Geissler <andrewg@us.ibm.com>
diff --git a/xyz/openbmc_project/State/Chassis/server.hpp b/xyz/openbmc_project/State/Chassis/server.hpp
new file mode 100644
index 0000000..b823b7f
--- /dev/null
+++ b/xyz/openbmc_project/State/Chassis/server.hpp
@@ -0,0 +1,132 @@
+#pragma once
+#include <tuple>
+#include <systemd/sd-bus.h>
+#include <sdbusplus/server.hpp>
+
+namespace sdbusplus
+{
+namespace xyz
+{
+namespace openbmc_project
+{
+namespace State
+{
+namespace server
+{
+
+class Chassis
+{
+    public:
+        /* Define all of the basic class operations:
+         *     Not allowed:
+         *         - Default constructor to avoid nullptrs.
+         *         - Copy operations due to internal unique_ptr.
+         *         - Move operations due to 'this' being registered as the
+         *           'context' with sdbus.
+         *     Allowed:
+         *         - Destructor.
+         */
+        Chassis() = delete;
+        Chassis(const Chassis&) = delete;
+        Chassis& operator=(const Chassis&) = delete;
+        Chassis(Chassis&&) = delete;
+        Chassis& operator=(Chassis&&) = delete;
+        virtual ~Chassis() = default;
+
+        /** @brief Constructor to put object onto bus at a dbus path.
+         *  @param[in] bus - Bus to attach to.
+         *  @param[in] path - Path to attach at.
+         */
+        Chassis(bus::bus& bus, const char* path);
+
+        enum class Transition
+        {
+            Off,
+            On,
+        };
+        enum class PowerState
+        {
+            Off,
+            On,
+        };
+
+
+
+        /** Get value of RequestedPowerTransition */
+        virtual Transition requestedPowerTransition() const;
+        /** Set value of RequestedPowerTransition */
+        virtual Transition requestedPowerTransition(Transition value);
+        /** Get value of CurrentPowerState */
+        virtual PowerState currentPowerState() const;
+        /** Set value of CurrentPowerState */
+        virtual PowerState currentPowerState(PowerState value);
+
+    /** @brief Convert a string to an appropriate enum value.
+     *  @param[in] s - The string to convert in the form of
+     *                 "xyz.openbmc_project.State.Chassis.<value name>"
+     *  @return - The enum value.
+     */
+    static Transition convertTransitionFromString(std::string& s);
+    /** @brief Convert a string to an appropriate enum value.
+     *  @param[in] s - The string to convert in the form of
+     *                 "xyz.openbmc_project.State.Chassis.<value name>"
+     *  @return - The enum value.
+     */
+    static PowerState convertPowerStateFromString(std::string& s);
+
+    private:
+
+        /** @brief sd-bus callback for get-property 'RequestedPowerTransition' */
+        static int _callback_get_RequestedPowerTransition(
+            sd_bus*, const char*, const char*, const char*,
+            sd_bus_message*, void*, sd_bus_error*);
+        /** @brief sd-bus callback for set-property 'RequestedPowerTransition' */
+        static int _callback_set_RequestedPowerTransition(
+            sd_bus*, const char*, const char*, const char*,
+            sd_bus_message*, void*, sd_bus_error*);
+
+        /** @brief sd-bus callback for get-property 'CurrentPowerState' */
+        static int _callback_get_CurrentPowerState(
+            sd_bus*, const char*, const char*, const char*,
+            sd_bus_message*, void*, sd_bus_error*);
+        /** @brief sd-bus callback for set-property 'CurrentPowerState' */
+        static int _callback_set_CurrentPowerState(
+            sd_bus*, const char*, const char*, const char*,
+            sd_bus_message*, void*, sd_bus_error*);
+
+
+        static constexpr auto _interface = "xyz.openbmc_project.State.Chassis";
+        static const vtable::vtable_t _vtable[];
+        sdbusplus::server::interface::interface
+                _xyz_openbmc_project_State_Chassis_interface;
+
+        Transition _requestedPowerTransition = Transition::Off;
+        PowerState _currentPowerState{};
+
+};
+
+/* Specialization of sdbusplus::server::bindings::details::convertForMessage
+ * for enum-type Chassis::Transition.
+ *
+ * This converts from the enum to a constant c-string representing the enum.
+ *
+ * @param[in] e - Enum value to convert.
+ * @return C-string representing the name for the enum value.
+ */
+std::string convertForMessage(Chassis::Transition e);
+/* Specialization of sdbusplus::server::bindings::details::convertForMessage
+ * for enum-type Chassis::PowerState.
+ *
+ * This converts from the enum to a constant c-string representing the enum.
+ *
+ * @param[in] e - Enum value to convert.
+ * @return C-string representing the name for the enum value.
+ */
+std::string convertForMessage(Chassis::PowerState e);
+
+} // namespace server
+} // namespace State
+} // namespace openbmc_project
+} // namespace xyz
+} // namespace sdbusplus
+