public async Task CreateForecastingTaskMLModel(string entityName, LearningAlgorithm algorithm, bool isValidationNeeded = true)
{
entityName = entityName?.Trim();
if (isValidationNeeded)
{
if (!await DoesForecastingTaskEntityExist(entityName))
{
throw new DomainErrorException($"Forecasting task with name {entityName} doesn't exist!");
}
}
try
{
var taskEntity = await _forecastingTasksRepository.GetForecastingTaskEntity(entityName);
if (taskEntity.Records.Count == 0)
{
throw new DomainErrorException("There are no data in the database!");
}
var nonInformationFields = taskEntity.FieldsDeclaration.Where(x => x.Type != FieldType.InformationField).ToList();
var entity = new ClassBuilder(entityName, GetFieldsType(nonInformationFields));
var dataList = (IList)Activator.CreateInstance(typeof(List <>).MakeGenericType(entity.Type));
foreach (var fieldsValue in taskEntity.Records)
{
var myClassInstance = entity.CreateObject();
foreach (var fieldDeclaration in nonInformationFields)
{
var value = fieldsValue.FieldsValue.Single(x => x.FieldId == fieldDeclaration.Id).Value;
entity.SetPropertyValue(myClassInstance, fieldDeclaration.Name, float.Parse(value));
}
dataList.Add(myClassInstance);
}
var factors = nonInformationFields.Where(x => x.Type == FieldType.Factor).Select(x => x.Name);
var predictedValue = nonInformationFields.Single(x => x.Type == FieldType.PredictionField).Name;
ForecastingTaskModelBuilder.CreateModel(dataList, entityName, factors, predictedValue, algorithm);
}
catch (Exception)
{
throw;
}
}
public async Task <string> GenerateCsvString(string entityName)
{
entityName = entityName?.Trim();
if (!await DoesForecastingTaskEntityExist(entityName))
{
throw new DomainErrorException($"Forecasting task with name {entityName} doesn't exist!");
}
try
{
var taskEntity = await _forecastingTasksRepository.GetForecastingTaskEntity(entityName);
var result = new StringBuilder(string.Join(',', taskEntity.FieldsDeclaration.Select(x => x.Name)));
foreach (var fieldsValue in taskEntity.Records)
{
var tempStr = "\r\n";
foreach (var factorDeclaration in taskEntity.FieldsDeclaration)
{
var value = fieldsValue.FieldsValue.Single(x => x.FieldId == factorDeclaration.Id).Value;
tempStr += value + ',';
}
result.Append(tempStr[0..^ 1]);