/// <summary>
/// Attempts to parse a container and validates it againsts its specification. A collection of <see cref="SegmentError"/> objects is returned
/// </summary>
/// <param name="container">Object to be validated</param>
/// <returns>Collection of Segment errors, if found</returns>
protected virtual IEnumerable <SegmentError> ValidateContainerAgainstSpec(ContainerInformation container)
{
var errors = new List <SegmentError>();
foreach (var segmentSpec in container.Spec.SegmentSpecifications.Where(ss => ss.Usage == Usage.Required))
{
if (!container.Segments.Exists(s => s.SegmentId == segmentSpec.SegmentId))
{
errors.Add(this.CreateSegmentError(
new SegmentInformation
{
SegmentId = segmentSpec.SegmentId,
LoopId = container.Spec.LoopId,
SegmentPosition = container.Segments.Count > 0 ? container.Segments.First().SegmentPosition : 0
},
"3"));
}
if (segmentSpec.Repeat > 0 && container.Segments.Count(s => s.SegmentId == segmentSpec.SegmentId) > segmentSpec.Repeat)
{
errors.Add(
this.CreateSegmentError(
container.Segments.Last(s => s.SegmentId == segmentSpec.SegmentId),
"5"));
}
}
foreach (var loopSpec in container.Spec.LoopSpecifications.Where(ls => ls.Usage == Usage.Required))
{
if (!container.Containers.Exists(c => c.Spec.LoopId == loopSpec.LoopId))
{
errors.Add(
this.CreateSegmentError(
new SegmentInformation
{
SegmentId = loopSpec.StartingSegment.SegmentId,
LoopId = container.Spec.LoopId,
SegmentPosition = container.Segments.Count > 0 ? container.Segments.Last().SegmentPosition : 0
},
"I7"));
}
if (loopSpec.LoopRepeat > 0 && container.Containers.Count(c => c.Spec.LoopId == loopSpec.LoopId) > loopSpec.LoopRepeat)
{
errors.Add(
this.CreateSegmentError(
container.Containers.Last(c => c.Spec.LoopId == loopSpec.LoopId).Segments.First(),
"4"));
}
}
foreach (var childContainer in container.Containers)
{
errors.AddRange(this.ValidateContainerAgainstSpec(childContainer));
}
return(errors);
}
/// <summary>
/// Builds a <see cref="TransactionSetResponse"/> object from the provided stream
/// </summary>
/// <param name="reader">Stream to pull transaction set data from</param>
/// <param name="functionalCode">Function group code to associate with transaction set</param>
/// <param name="versionIdentifierCode">Specification version code</param>
/// <param name="transaction">Transaction segment string to be parsed</param>
/// <returns>Transaction set response whether the set is valid, and the segment data</returns>
protected virtual TransactionSetResponse AcknowledgeTransaction(X12StreamReader reader, string functionalCode, string versionIdentifierCode, string transaction)
{
string[] transactionElements = reader.SplitSegment(transaction);
var response = new TransactionSetResponse
{
TransactionSetIdentifierCode = transactionElements[1],
TransactionSetControlNumber = transactionElements[2]
};
if (transactionElements.Length >= 4)
{
response.ImplementationConventionReference = transactionElements[3];
}
TransactionSpecification transactionSpec = this.specFinder.FindTransactionSpec(
functionalCode,
versionIdentifierCode,
response.TransactionSetIdentifierCode);
if (transactionSpec == null)
{
response.SyntaxErrorCodes.Add("1");
response.AcknowledgmentCode = AcknowledgmentCode.R_Rejected;
return(response);
}
var containers = new Stack <ContainerInformation>();
var transactionContainer = new ContainerInformation {
Spec = transactionSpec
};
containers.Push(transactionContainer);
var segmentInfos = new List <SegmentInformation>();
string[] segments = transaction.Split(new[] { reader.Delimiters.SegmentTerminator }, System.StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < segments.Length; i++)
{
string[] elements = segments[i].Split(reader.Delimiters.ElementSeparator);
var segmentInfo = new SegmentInformation {
SegmentId = elements[0], SegmentPosition = i + 1, Elements = elements
};
segmentInfo.Spec = this.specFinder.FindSegmentSpec(versionIdentifierCode, segmentInfo.SegmentId);
segmentInfos.Add(segmentInfo);
ContainerInformation currentContainer = containers.Peek();
switch (segmentInfo.SegmentId)
{
case "ST":
case "SE":
segmentInfo.LoopId = string.Empty;
transactionContainer.Segments.Add(segmentInfo);
break;
case "HL":
string hloopNumber = segmentInfo.Elements[1];
string hloopParentNumber = segmentInfo.Elements[2];
string hloopLevelCode = segmentInfo.Elements[3];
HierarchicalLoopSpecification hloopSpec = transactionSpec.HierarchicalLoopSpecifications.FirstOrDefault(hls => hls.LevelCode == hloopLevelCode);
if (hloopSpec != null)
{
while (!(containers.Peek().Spec is TransactionSpecification))
{
if (containers.Peek().HLoopNumber == hloopParentNumber)
{
break;
}
containers.Pop();
}
segmentInfo.LoopId = hloopSpec.LoopId;
var hloopContainer = new ContainerInformation {
Spec = hloopSpec, HLoopNumber = hloopNumber
};
hloopContainer.Segments.Add(segmentInfo);
containers.Peek().Containers.Add(hloopContainer);
containers.Push(hloopContainer);
}
else
{
response.SegmentErrors.Add(this.CreateDataElementError(segmentInfo, 3, "I6", hloopLevelCode));
response.AcknowledgmentCode = AcknowledgmentCode.X_Rejected_ContentCouldNotBeAnalyzed;
}
break;
default:
bool matchFound = false;
do
{
var matchingLoopSpecs = currentContainer.Spec.LoopSpecifications.Where(ls => ls.StartingSegment.SegmentId == segmentInfo.SegmentId).ToList();
if (matchingLoopSpecs.Count > 0)
{
IContainerSpecification matchingLoopSpec;
if (matchingLoopSpecs.Count == 1)
{
matchingLoopSpec = matchingLoopSpecs.First();
}
else
{
string entityCode = elements[1];
matchingLoopSpec = matchingLoopSpecs.FirstOrDefault(ls => ls.StartingSegment.EntityIdentifiers.Exists(ei => ei.Code == entityCode));
}
if (matchingLoopSpec != null)
{
segmentInfo.LoopId = matchingLoopSpec.LoopId;
var loopContainer = new ContainerInformation {
Spec = matchingLoopSpec
};
loopContainer.Segments.Add(segmentInfo);
containers.Peek().Containers.Add(loopContainer);
containers.Push(loopContainer);
matchFound = true;
}
else
{
response.SegmentErrors.Add(this.CreateSegmentError(segmentInfo, "6"));
response.AcknowledgmentCode = AcknowledgmentCode.X_Rejected_ContentCouldNotBeAnalyzed;
return(response);
}
}
else if (currentContainer.Spec.SegmentSpecifications.Exists(ss => ss.SegmentId == segmentInfo.SegmentId))
{
segmentInfo.LoopId = currentContainer.Spec.LoopId;
currentContainer.Segments.Add(segmentInfo);
matchFound = true;
}
else
{
if (currentContainer.Spec is TransactionSpecification)
{
response.SegmentErrors.Add(this.CreateSegmentError(segmentInfo, "2"));
response.AcknowledgmentCode = AcknowledgmentCode.X_Rejected_ContentCouldNotBeAnalyzed;
return(response);
}
containers.Pop();
currentContainer = containers.Peek();
}
}while (!matchFound);
break;
}
response.SegmentErrors.AddRange(this.ValidateSegmentAgainstSpec(segmentInfo));
}
response.SegmentErrors.AddRange(this.ValidateContainerAgainstSpec(transactionContainer));
var trailerSegment = segmentInfos.FirstOrDefault(si => si.SegmentId == "SE");
if (trailerSegment == null)
{
response.SyntaxErrorCodes.Add("2");
}
else
{
if (trailerSegment.Elements.Length <= 2 || trailerSegment.Elements[2] != response.TransactionSetControlNumber)
{
response.SyntaxErrorCodes.Add("3");
}
if (trailerSegment.Elements.Length >= 2)
{
int segmentCount;
int.TryParse(trailerSegment.Elements[1], out segmentCount);
if (segmentCount != segmentInfos.Count)
{
response.SyntaxErrorCodes.Add("4");
}
}
else
{
response.SyntaxErrorCodes.Add("4");
}
}
if (response.SegmentErrors.Count > 0 || response.SyntaxErrorCodes.Count > 0)
{
if (response.SegmentErrors.Count > 0)
{
response.SyntaxErrorCodes.Add("5");
}
if (response.AcknowledgmentCode == AcknowledgmentCode.A_Accepted)
{
response.AcknowledgmentCode = AcknowledgmentCode.E_Accepted_ButErrorsWereNoted;
}
}
return(response);
}
