public IActionResult GetDevicesTwinIds([FromBody] DeviceQueryRuleGroup where)
{
try
{
logger.LogInformation("Get DeviceTwin Ids Properties called");
IEnumerable <string> response = _deviceServiceDB.GetDevicesTwinIds(where);
return(Ok(response));
}
catch (Exception e)
{
logger.LogError(e, "Get DeviceTwin Ids Properties- Exception {message}", e.Message);
throw;
}
}
public IEnumerable <string> GetDevicesTwinIds(DeviceQueryRuleGroup where)
{
DevicesDBCache deviceDB = _Cache.DevicesDB;
if (!deviceDB.IsDevicesDBCacheInitialized)
{
return(new List <string>());
}
try
{
//Get cached devices
IEnumerable <DeviceTwinFlatModel> devices = deviceDB.Devices.Values;
return(InMemoryLinqDeviceQueryHelper.GetFilteredDevicesIds(devices, where));
}
catch (Exception e)
{
Log.Error("Get IoTHub Devices Twin Ids error {@error}", e.Message);
return(new List <string>());
}
}
private static Func <DeviceTwinFlatModel, bool> GetFilteredDevicesOr(IEnumerable <DeviceTwinFlatModel> devices, DeviceQueryRuleGroup filterGroup)
{
var predicate = PredicateBuilder.False <DeviceTwinFlatModel>();
if (filterGroup != null)
{
//First, dealing with groups
foreach (var subFilterGroup in filterGroup.Groups)
{
if (subFilterGroup == null || (subFilterGroup.Rules.Count == 0 && subFilterGroup.Groups.Count == 0))
{
continue;
}
if (subFilterGroup.Operator == LogicalOperators.And)
{
predicate = predicate.Or(GetFilteredDevicesAnd(devices, subFilterGroup));
}
else
{
predicate = predicate.Or(GetFilteredDevicesOr(devices, subFilterGroup));
}
}
foreach (DeviceQueryRule rule in filterGroup.Rules)
{
if (rule != null)
{
predicate = predicate.Or(GetFilteredDevices(devices, rule));
}
}
}
return(predicate);
}
public static IEnumerable <string> GetFilteredDevicesIds(IEnumerable <DeviceTwinFlatModel> devices, DeviceQueryRuleGroup filterGroup)
{
_StringFields = InMemoryLambdaExpressionsHelper.FieldsStringLambdas;
_IntegerFields = InMemoryLambdaExpressionsHelper.FieldsIntegerLambdas;
_DoubleFields = InMemoryLambdaExpressionsHelper.FieldsDoubleLambdas;
_DateFields = InMemoryLambdaExpressionsHelper.FieldsDateLambdas;
_BoolFields = InMemoryLambdaExpressionsHelper.FieldsBoolLambdas;
if (filterGroup.Operator == LogicalOperators.And)
{
return(devices.Where(GetFilteredDevicesAnd(devices, filterGroup)).Select(p => p.DeviceId));
}
return(devices.Where(GetFilteredDevicesOr(devices, filterGroup)).Select(p => p.DeviceId));
}
