/// <summary>
/// Given a file, parse the x12 into the hard coded defintion of a specific format T
/// </summary>
/// <typeparam name="T">specific format type to parse into</typeparam>
/// <param name="fullFilePath">location of the x12 file</param>
/// <returns>A list of X12 documents, each of which has a unique group of ISA/GS/ST/BHT, if a file has multiple of any of these, they will be rendered as a seperate X12Document</returns>
public static IEnumerable <X12Doc> ParseFile <T>(string fullFilePath) where T : X12Doc
{
X12Doc tempBuildingDoc = (T)Activator.CreateInstance(typeof(T), args: new object[] { true });
var newHeaderSection = false;
var newTrailerSection = false;
var parserState = new ParserStateMachine();
var retDocs = new List <X12Doc>();
var sStream = new SegmentStream(File.OpenRead(fullFilePath), ref tempBuildingDoc);
var lineContent = new BaseFieldValues(sStream.ReadNextLine(tempBuildingDoc.DocDelimiters));
List <string> headerSplit = HeaderSegments.Split(',').ToList();
List <string> trailerSplit = TrailerSegments.Split(',').ToList();
while (lineContent != null)
{
//is a head segment
if (headerSplit.Contains(lineContent[0]))
{
if (!newHeaderSection)
{
//copy the errors to date into the tempBuildingDoc so we can see if there are any errors
tempBuildingDoc.AddParsingErrors(parserState.Errors);
parserState.Errors.Clear();
//if we just had a trailer section, then we need to create a new tempBuildingDoc to start a new X12 document
if (newTrailerSection)
{
tempBuildingDoc = (T)Activator.CreateInstance(typeof(T), args: new object[] { true });
}
retDocs.Add(tempBuildingDoc);
newHeaderSection = true;
newTrailerSection = false;
}
if (tempBuildingDoc.BeginHierarchicalTransaction.IsQualified(lineContent))
{
tempBuildingDoc.BeginHierarchicalTransaction.Populate(lineContent);
}
else if (tempBuildingDoc.TransactionSetHeader.IsQualified(lineContent))
{
tempBuildingDoc.TransactionSetHeader.Populate(lineContent);
}
else if (tempBuildingDoc.InterchagneControlHeader.IsQualified(lineContent))
{
tempBuildingDoc.InterchagneControlHeader.Populate(lineContent);
}
else if (tempBuildingDoc.FunctionGroupHeader.IsQualified(lineContent))
{
tempBuildingDoc.FunctionGroupHeader.Populate(lineContent);
}
else //should never happen, but defensive
{
parserState.Errors.Add(
new ParserError("Header segment found no IsQualified handlers and failed to parse",
X12ErrorTypes.NotDefined, X12ErrorLevel.Segment, parserState.CurrentLoop, lineContent));
}
}
else if (trailerSplit.Contains(lineContent[0]))//is a trailer segment
{
newTrailerSection = true;
newHeaderSection = false;
if (tempBuildingDoc.TransactionSetTrailer.IsQualified(lineContent))
{
tempBuildingDoc.TransactionSetTrailer.Populate(lineContent);
}
else if (tempBuildingDoc.FunctionalGroupTrailer.IsQualified(lineContent))
{
tempBuildingDoc.FunctionalGroupTrailer.Populate(lineContent);
}
else if (tempBuildingDoc.InterchangeControlTrailer.IsQualified(lineContent))
{
tempBuildingDoc.InterchangeControlTrailer.Populate(lineContent);
}
else//should never happen, but defensive
{
parserState.Errors.Add(
new ParserError("Trailer segment found no IsQualified handlers and failed to parse",
X12ErrorTypes.NotDefined, X12ErrorLevel.Segment, parserState.CurrentLoop, lineContent));
}
}
else //has to be in the doc def
{
newHeaderSection = false;
newTrailerSection = false;
parserState = tempBuildingDoc.ParseLineSegment(parserState, lineContent);
}
lineContent = sStream.ReadNextLine(tempBuildingDoc.DocDelimiters);
}
return(retDocs);
}
