internal static List <BaseField> ParseFields(string value, Hl7Encoding encoding)
{
string name = GetSegmentName(value);
IEnumerable <string> allFields = EncodingHelper.Split(value, encoding.FieldDelimiter);
return(ParseFields(allFields, encoding, name == MSH));
}
internal static BaseComponent CreateComponent(Hl7Encoding encoding, string value)
{
if (value.Contains(encoding.SubComponentDelimiter.ToString()))
{
return(new ComplexComponent(EncodingHelper.Split(value, encoding.SubComponentDelimiter).ConvertAll(s => new SubComponent(encoding.Decode(s), encoding)), encoding));
}
return(new SimpleComponent(value, encoding));
}
internal static BaseField CreateField(Hl7Encoding encoding, string value)
{
if (value.Contains(encoding.RepeatDelimiter))
{
return(new RepetitionField(EncodingHelper.Split(value, encoding.RepeatDelimiter).ConvertAll(f => CreateField(encoding, f)), encoding));
}
if (value.Contains(encoding.ComponentDelimiter))
{
return(new ComponentField(EncodingHelper.Split(value, encoding.ComponentDelimiter).ConvertAll(c => CreateComponent(encoding, c)), encoding));
}
return(new ValueField(EncodingHelper.Decode(encoding, value), encoding));
}
internal static Result <ElementIndex> TryParseIndexesFromValueFormat(string format)
{
BaseSpecificElementIndex?fieldIndex = null, subFieldIndex = null, componentIndex = null;
int? subComponentIndex = null;
List <string> allComponents = EncodingHelper.Split(format, '.');
if (allComponents.Count > 4 || allComponents.Count == 0)
{
return(ErrorReturn <ElementIndex>($"Expected 1-4 values in the valueFormat field of ParseIndexesFromValueFormat, expected: SegmentName.FieldIndex.ComponentIndex.SubComponentIndex found {format}."));
}
if (!GetSegmentIndex(allComponents[0]).DecomposeResult(out var segmentIndex, out string?error))
{
return(ErrorReturn <ElementIndex>(error ?? "unknown error parsing segment name"));
}
if (allComponents.Count > 1)
{
string field = allComponents[1];
if (field.Contains('-'))
{
List <string> fieldParts = EncodingHelper.Split(field, '-');
if (fieldParts.Count != 2)
{
return(ErrorReturn <ElementIndex>($"Expected exactly 2 ints seperated by a dash in the field position found {field} instead"));
}
field = fieldParts[0];
if (!GetElementIndex(fieldParts[1]).DecomposeResult(out subFieldIndex, out error))
{
return(ErrorReturn <ElementIndex>(error ?? "unknown error parsing indexes for subfield"));
}
}
if (!GetElementIndex(field).DecomposeResult(out fieldIndex, out error))
{
return(ErrorReturn <ElementIndex>(error ?? "unknown error parsing indexes for field"));
}
if (allComponents.Count > 2)
{
if (!GetElementIndex(allComponents[2]).DecomposeResult(out componentIndex, out error))
{
return(ErrorReturn <ElementIndex>(error ?? "unknown error parsing indexes for component"));
}
subComponentIndex = ParseIntFromStringList(allComponents, 3);
}
}
return(new Result <ElementIndex>(new ElementIndex(segmentIndex, fieldIndex, subFieldIndex, componentIndex, subComponentIndex), null));
}
internal static Result <string> TryGetMessageFormat(this Message message)
{
if (message == null)
{
return(ErrorReturn <string>("Attempted to get MSH segment, but message is null"));
}
string?messageStructure = GetMessageType(message);
if (string.IsNullOrWhiteSpace(messageStructure))
{
return(ErrorReturn <string>("MSH 9.3 not found"));
}
List <string> structure = EncodingHelper.Split(messageStructure, message.Encoding.ComponentDelimiter);
if (structure.Count >= 3)
{
messageStructure = structure[2];
}
else if (structure[0] == MessageHelper.ACK)
{
messageStructure = structure[0];
}
else if (structure.Count == 2)
{
messageStructure = structure[0] + "_" + structure[1];
}
else
{
return(ErrorReturn <string>("Message Type & Trigger Event value not found in message"));
}
if (string.IsNullOrWhiteSpace(messageStructure))
{
return(ErrorReturn <string>("MSH 9.3 not properly formatted"));
}
return(new Result <string>(messageStructure !, null));
}
internal static Result <BaseSegmentIndex> GetSegmentIndex(string nameIn)
{
string?segIndex = null, colIndexStr = null;
if (nameIn.Contains('-'))
{
List <string> segmentParts = EncodingHelper.Split(nameIn, '-');
if (segmentParts.Count != 2)
{
return(ErrorReturn <BaseSegmentIndex>($"Expected only one dash in index similiar to x-y or x:y-z in the segmentName position found {nameIn} instead"));
}
segIndex = segmentParts[1];
}
List <string> multiSegmentParts = nameIn.Split(':', '-').ToList();
if (nameIn.Contains(':'))
{
if (nameIn.Contains('-') && multiSegmentParts.Count != 3)
{
return(ErrorReturn <BaseSegmentIndex>($"Expected exactly 3 values in the format x:y-z in the segementname position, found {nameIn} instead"));
}
if (!nameIn.Contains('-') && multiSegmentParts.Count != 2)
{
return(ErrorReturn <BaseSegmentIndex>($"Expected exactly 2 values in the format x:y in the segementname position, found {nameIn} instead"));
}
colIndexStr = multiSegmentParts[1];
}
int?colIndex = null;
if (!string.IsNullOrWhiteSpace(colIndexStr))
{
if (int.TryParse(colIndexStr, out int colIndexInt))
{
colIndex = colIndexInt;
}
else
{
return(ErrorReturn <BaseSegmentIndex>($"Could not parse segment collection index as int value {colIndexStr} from {nameIn}"));
}
}
if (int.TryParse(multiSegmentParts[0], out int segIntIndex))
{
if (segIndex != null)
{
return(ErrorReturn <BaseSegmentIndex>($"attempted to use a segment indexer ({segIndex}), with a segment ordinal ({segIntIndex}), you can't use a segment ordinal with a segment index"));
}
if (colIndexStr != null)
{
return(ErrorReturn <BaseSegmentIndex>($"attempted to use a multisegment ordinal ({segIndex}), with a segment ordinal ({segIntIndex}), you can't use a multisegment ordinal with a segment index"));
}
return(new Result <BaseSegmentIndex>(new SegmentOrdinalIndex(segIntIndex)));
}
if (segIndex != null)
{
if (int.TryParse(segIndex, out int index))
{
return(new Result <BaseSegmentIndex>(new SegmentNameAndOrdinalIndex(multiSegmentParts[0], index, colIndex)));
}
else
{
return(new Result <BaseSegmentIndex>(new SegmentNameAndIdIndex(multiSegmentParts[0], segIndex, colIndex)));
}
}
return(new Result <BaseSegmentIndex>(new SegmentNamedIndex(multiSegmentParts[0], colIndex)));
}
