public RowEnumerator(ReadOnlySpan <char> str, ParseRowFunc <T> parseRowFunc, char rowSeparator = '\n', char columnSeparator = ',')
{
rowsEnumerator = str.FastSplit(rowSeparator);
this.parseRowFunc = parseRowFunc;
this.columnSeparator = columnSeparator;
Current = default;
rowIndex = 0;
}
public void Execute(ParseRowFunc parserFunc)
{
// validate parameters
if (String.IsNullOrWhiteSpace(this.Shoulder))
throw new NullReferenceException("Shoulder must not be null");
if (String.IsNullOrWhiteSpace(this.CsvFilePath))
throw new NullReferenceException("CSVFilePath must not be null");
if (this.Authentication == null)
throw new NullReferenceException("Authentication must not be null");
// open csv file for reading
using (var csvFileStream = File.Open(this.CsvFilePath, FileMode.Open, FileAccess.Read))
{
var csvFileReader = new StreamReader(csvFileStream, UTF8Encoding.UTF8, true);
// open result file for writing
var resultFile = this.ResultFile;
if(resultFile == null)
resultFile = String.Format("{0}.result.csv", Path.GetFileNameWithoutExtension(this.CsvFilePath));
using (var resultFileStream = File.Open(resultFile, FileMode.Append, FileAccess.Write))
{
var resultFileWriter = new StreamWriter(resultFileStream, UTF8Encoding.UTF8);
// read all lines for until line limit it hit
int count = 0;
while (!csvFileReader.EndOfStream && (count < this.Limit || this.Limit == LimitAll))
{
string line = null;
try
{
// parse the line
line = csvFileReader.ReadLine();
var metadata = parserFunc(line);
// make the request
var request = new MintRequest(this.Shoulder, metadata, this.Authentication);
var response = request.ExecuteRequest();
// ensure the response is valid
if (String.IsNullOrWhiteSpace(response))
throw new Exception("No identifier returned");
// write response to result file
resultFileWriter.WriteLine(String.Format("{0},{1}", line, response));
}
catch (Exception e)
{
// something happened, track it in result file
if (line == null)
{
resultFileWriter.WriteLine(String.Format(e.Message));
}
else
{
resultFileWriter.WriteLine(String.Format("{0},{1}", line, e.Message));
}
}
finally
{
count++;
}
}
csvFileReader.Close();
resultFileWriter.Close();
}
}
}
public static RowEnumerator <T> ParseCsv <T>(this ReadOnlySpan <char> csvSpan, ParseRowFunc <T> parseRowAction, char rowSeparator = '\n', char columnSeparator = ',') where T : new()
{
return(new RowEnumerator <T>(csvSpan, parseRowAction, rowSeparator, columnSeparator));
}
public static RowEnumerator <T> ParseCsv <T>(this string csvString, ParseRowFunc <T> parseRowAction, char rowSeparator = '\n', char columnSeparator = ',') where T : new()
{
return(new RowEnumerator <T>(csvString, parseRowAction, rowSeparator, columnSeparator));
}
