/// <inheritdoc />
public IEnumerable <IModListingGetter> Parse(Stream stream)
{
using var streamReader = new StreamReader(stream);
while (!streamReader.EndOfStream)
{
var str = streamReader.ReadLine().AsSpan();
var commentIndex = str.IndexOf('#');
if (commentIndex != -1)
{
str = str.Slice(0, commentIndex);
}
if (MemoryExtensions.IsWhiteSpace(str) || str.Length == 0)
{
continue;
}
yield return(_listingParser.FromString(str));
}
}
private static void BuildPart(string input, Span <char> output, ref int currentPosition)
{
var productLength = input?.Length ?? 0;
// check if empty string, if so, unknown
if (productLength == 0 || MemoryExtensions.IsWhiteSpace(input))
{
UnknownPart.CopyTo(output.Slice(currentPosition));
currentPosition += UnknownPart.Length;
}
else
{
// check valid
var isValid = true;
foreach (var c in input)
{
if (!char.IsLetterOrDigit(c) && c != ' ')
{
isValid = false;
break;
}
}
if (!isValid) // not valid
{
InvalidPart.CopyTo(output.Slice(currentPosition));
currentPosition += InvalidPart.Length;
}
else
{
// if valid, lowercase
MemoryExtensions.ToLowerInvariant(input, output.Slice(currentPosition));
currentPosition += productLength;
}
}
output[currentPosition++] = JoinChar;
}
