Initial phosphor-state-manager commit

Still a lot of work to come with this one but this is the
initial makefile and building of a basic application
that provides dbus introspection and properties of
the xyz/openbmc_project/State/Host.interface.yaml

Change-Id: I406fafa6a50721b2f28ab6df03ef98a940e2db6e
Signed-off-by: Andrew Geissler <andrewg@us.ibm.com>
diff --git a/xyz/openbmc_project/State/Host/server.hpp b/xyz/openbmc_project/State/Host/server.hpp
new file mode 100644
index 0000000..149baa0
--- /dev/null
+++ b/xyz/openbmc_project/State/Host/server.hpp
@@ -0,0 +1,133 @@
+#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 Host
+{
+    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.
+         */
+        Host() = delete;
+        Host(const Host&) = delete;
+        Host& operator=(const Host&) = delete;
+        Host(Host&&) = delete;
+        Host& operator=(Host&&) = delete;
+        virtual ~Host() = 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.
+         */
+        Host(bus::bus& bus, const char* path);
+
+        enum class Transition
+        {
+            Off,
+            On,
+            Reboot,
+        };
+        enum class HostState
+        {
+            Off,
+            Running,
+        };
+
+
+
+        /** Get value of RequestedHostTransition */
+        virtual Transition requestedHostTransition() const;
+        /** Set value of RequestedHostTransition */
+        virtual Transition requestedHostTransition(Transition value);
+        /** Get value of CurrentHostState */
+        virtual HostState currentHostState() const;
+        /** Set value of CurrentHostState */
+        virtual HostState currentHostState(HostState 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.Host.<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.Host.<value name>"
+     *  @return - The enum value.
+     */
+    static HostState convertHostStateFromString(std::string& s);
+
+    private:
+
+        /** @brief sd-bus callback for get-property 'RequestedHostTransition' */
+        static int _callback_get_RequestedHostTransition(
+            sd_bus*, const char*, const char*, const char*,
+            sd_bus_message*, void*, sd_bus_error*);
+        /** @brief sd-bus callback for set-property 'RequestedHostTransition' */
+        static int _callback_set_RequestedHostTransition(
+            sd_bus*, const char*, const char*, const char*,
+            sd_bus_message*, void*, sd_bus_error*);
+
+        /** @brief sd-bus callback for get-property 'CurrentHostState' */
+        static int _callback_get_CurrentHostState(
+            sd_bus*, const char*, const char*, const char*,
+            sd_bus_message*, void*, sd_bus_error*);
+        /** @brief sd-bus callback for set-property 'CurrentHostState' */
+        static int _callback_set_CurrentHostState(
+            sd_bus*, const char*, const char*, const char*,
+            sd_bus_message*, void*, sd_bus_error*);
+
+
+        static constexpr auto _interface = "xyz.openbmc_project.State.Host";
+        static const vtable::vtable_t _vtable[];
+        sdbusplus::server::interface::interface
+                _xyz_openbmc_project_State_Host_interface;
+
+        Transition _requestedHostTransition = Transition::Off;
+        HostState _currentHostState{};
+
+};
+
+/* Specialization of sdbusplus::server::bindings::details::convertForMessage
+ * for enum-type Host::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(Host::Transition e);
+/* Specialization of sdbusplus::server::bindings::details::convertForMessage
+ * for enum-type Host::HostState.
+ *
+ * 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(Host::HostState e);
+
+} // namespace server
+} // namespace State
+} // namespace openbmc_project
+} // namespace xyz
+} // namespace sdbusplus
+