public virtual void ProcessRecord(TDomain domain, ImportValueDictionary <TDomain> values, bool isNew)
{
List <Exception> exceptions = new List <Exception>();
foreach (var prop in Properties.Where(x => !x.IsIgnoredFor(domain)))
{
if (prop != _idProperty && (prop.Update || isNew))
{
try
{
prop.SetValue(domain, isNew, values.Get(prop), Context, values);
}
catch (Exception ex)
{
exceptions.Add(ex);
}
}
}
if (exceptions.Any())
{
throw new AggregateException(exceptions);
}
}
public abstract void SetValue(TDomain record, bool isNew, object value, TContext context, ImportValueDictionary <TDomain> values);
public virtual TDomain CreateRecord(ImportValueDictionary <TDomain> values)
{
return(Activator.CreateInstance <TDomain>());
}
public void ImportFromDataTable(ImportType importType, DataTable dt, bool isFromExcel)
{
var import = this;
Func <DataRow, IImportProperty, string> formatRowNumber = (dr, prop) =>
{
if (import.ByCellReference)
{
return(prop?.Description == null ? null : (" for '" + prop.Description + "'"));
}
else
{
int row = import.RowStart + dt.Rows.IndexOf(dr) + 1;
if (isFromExcel)
{
row++; //Account for header row
}
if (import is IHasMetadataRow <TDomain> )
{
row++;
}
return($" for {(isFromExcel ? "row" : "record")} {row}");
}
};
List <DataRow> rows = import.Sort(dt).ToList();
Dictionary <DataRow, ImportValueDictionary <TDomain> > valuesDict = new Dictionary <DataRow, ImportValueDictionary <TDomain> >();
//Parse the values
foreach (DataRow dr in rows)
{
var values = new ImportValueDictionary <TDomain>();
foreach (var prop in import.Properties)
{
object val = dr[prop.FieldName];
if (val == DBNull.Value)
{
val = null;
}
//Data table stores nullable Enum as int. Have to convert it to the underlying enum type
if (Nullable.GetUnderlyingType(prop.PropertyType)?.IsEnum == true && val != null)
{
val = Enum.ToObject(Nullable.GetUnderlyingType(prop.PropertyType), val);
}
values[prop.ExpressionKey] = prop.Parse(val);
}
valuesDict[dr] = values;
}
import.BeforeImport(valuesDict.Values);
var exceptions = new List <Exception>();
var importedRecords = new List <ImportedRecord <TDomain> >();
foreach (DataRow dr in rows)
{
//skip rows that are all null
if (dr.Table.Columns.OfType <DataColumn>().All(c => dr.IsNull(c)))
{
continue;
}
try
{
var values = valuesDict[dr];
TId id = import.CanUpdate ? values.Get(IdExpression) : default(TId);
bool idIsNull = EqualityComparer <TId> .Default.Equals(id, default(TId));
//Validate the import type
if (idIsNull && importType == ImportType.Update)
{
exceptions.Add(new Exception($"Valiation failed{formatRowNumber(dr, null)}: Attempting to update a non-existing record."));
}
else if (!idIsNull && importType == ImportType.Create)
{
exceptions.Add(new Exception($"Valiation failed{formatRowNumber(dr, null)}: Attempting to create an existing record."));
}
//Don't continue to validate this record if there are errors at this point.
if (exceptions.Any())
{
continue;
}
//Get the domain object
TDomain domain = null;
if (!idIsNull)
{
domain = FindById(id);
}
else
{
domain = import.CreateRecord(values);
}
bool isNew = EqualityComparer <TId> .Default.Equals(GetId(domain), default(TId));
//Validate required properties
foreach (var prop in import.Properties.Where(x => !x.IsIgnoredFor(domain)))
{
if (prop.Update || isNew) //Do not validate properties if they will not be updated and this is an update import
{
if (prop.Required && values.Get(prop) == null)
{
exceptions.Add(new Exception($"Validation failed{formatRowNumber(dr, prop)}: {prop.FieldName} is missing."));
}
}
}
//Validate Regex
foreach (var prop in import.Properties.Where(x => x.ValidateRegex != null && !x.IsIgnoredFor(domain)))
{
string str = values.Get(prop)?.ToString();
if (str != null)
{
if (!prop.ValidateRegex.IsMatch(str))
{
exceptions.Add(new Exception($"Validation failed{formatRowNumber(dr, prop)}: {prop.FieldName} must match /{prop.ValidateRegex}/"));
}
}
}
//Don't process this record if there are validation errors at this point.
if (exceptions.Any())
{
continue;
}
BeforeProcessRecord(domain);
//Process the row
import.ProcessRecord(domain, values, isNew);
//Validate the resulting record
try
{
//Validate conditionally required properties
foreach (var prop in import.Properties.Where(x => x.RequiredIf != null && !x.IsIgnoredFor(domain)))
{
if (prop.RequiredIf(domain) && values.Get(prop) == null)
{
exceptions.Add(new Exception($"Validation failed{formatRowNumber(dr, prop)}: {prop.FieldName} is missing."));
}
}
import.ValidateRecord(domain);
}
catch (Exception ex)
{
exceptions.Add(new Exception($"Validation failed{formatRowNumber(dr, null)}: {ex.Message}", ex));
}
importedRecords.Add(new ImportedRecord <TDomain>()
{
Record = domain, Values = values, IsNew = isNew
});
}
catch (Exception ex)
{
string messages = ex.Message;
if (ex is AggregateException ae)
{
messages = string.Join("; ", ae.InnerExceptions.Select(x => x.Message));
}
exceptions.Add(new Exception($"Import failed{formatRowNumber(dr, null)}: {messages}", ex));
}
}
if (exceptions.Any())
{
throw new AggregateException(exceptions);
}
import.AfterImport(new AfterImportArgs <TDomain>(importedRecords, importType));
}