support GetCompositeSched without Unit using the first allowed unit

Author: thom-gh

src/chargepoint/smartcharging/SmartChargingManager.cpp

@@ -356,9 +356,23 @@ bool SmartChargingManager::handleMessage(const ocpp::messages::GetCompositeSched
     (void)error_code;
     (void)error_message;
 
+    ocpp::types::ChargingRateUnitType charging_rate_unit;
+    if (!request.chargingRateUnit.isSet())
+    {
+        if (m_ocpp_config.chargingScheduleAllowedChargingRateUnit().find("Power") != std::string::npos)
+        {
+            charging_rate_unit = types::ChargingRateUnitType::W;
+        } else
+        {
+            charging_rate_unit = types::ChargingRateUnitType::A;
+        }
+    } else {
+        charging_rate_unit = request.chargingRateUnit.value();
+    }
+
     LOG_INFO << "GetCompositeSchedule requested : connectorId = " << request.connectorId << " - duration = " << request.duration
-             << " - chargingRateUnit = "
-             << (request.chargingRateUnit.isSet() ? ChargingRateUnitTypeHelper.toString(request.chargingRateUnit) : "not set");
+             << " - chargingRateUnit = " <<  ChargingRateUnitTypeHelper.toString(charging_rate_unit)
+             << (!request.chargingRateUnit.isSet() ? " (from allowed charging unit)" : "");
 
     // Lock profiles
     std::lock_guard<std::mutex> lock(m_mutex);
@@ -442,14 +456,8 @@ bool SmartChargingManager::handleMessage(const ocpp::messages::GetCompositeSched
 
             ChargingSchedule& schedule = response.chargingSchedule.value();
             schedule.duration          = 0;
-            if (request.chargingRateUnit.isSet())
-            {
-                schedule.chargingRateUnit = request.chargingRateUnit;
-            }
-            else
-            {
-                schedule.chargingRateUnit = ChargingRateUnitType::A;
-            }
+            schedule.chargingRateUnit  = charging_rate_unit;
+
             // Adjust start if needed since first period must start at 0
             time_t offset          = periods[0].start;
             schedule.startSchedule = DateTime(now.timestamp() + offset);