entity-manager: create power_status_monitor.cpp

These functions belong to PowerStatusMonitor class but were still in
utils.cpp.

Code was only moved and otherwise unchanged.

Tested: Inspection only.

Change-Id: I179eb53718df376116e056b1285f7d1eb4a0ec22
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/src/entity_manager/power_status_monitor.cpp b/src/entity_manager/power_status_monitor.cpp
new file mode 100644
index 0000000..cd8b9ca
--- /dev/null
+++ b/src/entity_manager/power_status_monitor.cpp
@@ -0,0 +1,61 @@
+#include "power_status_monitor.hpp"
+
+#include "utils.hpp"
+
+#include <boost/algorithm/string/predicate.hpp>
+#include <sdbusplus/bus/match.hpp>
+
+namespace power
+{
+
+const static constexpr char* busname = "xyz.openbmc_project.State.Host";
+const static constexpr char* interface = "xyz.openbmc_project.State.Host";
+const static constexpr char* path = "/xyz/openbmc_project/state/host0";
+const static constexpr char* property = "CurrentHostState";
+
+bool PowerStatusMonitor::isPowerOn()
+{
+    if (!powerMatch)
+    {
+        throw std::runtime_error("Power Match Not Created");
+    }
+    return powerStatusOn;
+}
+
+void PowerStatusMonitor::setupPowerMatch(
+    const std::shared_ptr<sdbusplus::asio::connection>& conn)
+{
+    powerMatch = std::make_unique<sdbusplus::bus::match_t>(
+        static_cast<sdbusplus::bus_t&>(*conn),
+        "type='signal',interface='" +
+            std::string(em_utils::properties::interface) + "',path='" +
+            std::string(power::path) + "',arg0='" +
+            std::string(power::interface) + "'",
+        [this](sdbusplus::message_t& message) {
+            std::string objectName;
+            boost::container::flat_map<std::string, std::variant<std::string>>
+                values;
+            message.read(objectName, values);
+            auto findState = values.find(power::property);
+            if (findState != values.end())
+            {
+                powerStatusOn = boost::ends_with(
+                    std::get<std::string>(findState->second), "Running");
+            }
+        });
+
+    conn->async_method_call(
+        [this](boost::system::error_code ec,
+               const std::variant<std::string>& state) {
+            if (ec)
+            {
+                return;
+            }
+            powerStatusOn =
+                boost::ends_with(std::get<std::string>(state), "Running");
+        },
+        power::busname, power::path, em_utils::properties::interface,
+        em_utils::properties::get, power::interface, power::property);
+}
+
+} // namespace power