public static void Handle(FileReaderWriterParameters parameters)
{
EnsureInputFileExists(parameters.InputPath);
var fileLines = File.ReadLines(parameters.InputPath);
var fileLinesAmount = fileLines.Count();
var expectedLinesAmount = parameters.Lines.Max();
EnsureMaxLineNumberInFileIsGreaterThanExpected(fileLinesAmount, expectedLinesAmount);
WriteLinesInOutput(parameters, fileLines);
}
private static void WriteLinesInOutput(FileReaderWriterParameters parameters, IEnumerable <string> inputFileLines)
{
using StreamWriter streamWriter = new StreamWriter(parameters.OutputPath);
var index = 1;
foreach (var line in inputFileLines)
{
if (parameters.Lines.Contains(index))
{
var numberOfRepetitions = parameters.Lines.Count(numberOfLine => numberOfLine == index);
var linesToWrite = RepeatLine(line, numberOfRepetitions);
streamWriter.WriteLine(linesToWrite);
}
index++;
}
}