public static DaysWeather ParseFileDataToWeatherData(string weatherFileData)
{
DaysWeather weatherData = new DaysWeather();
List <string> split = weatherFileData.Split().Where(s => !string.IsNullOrWhiteSpace(s)).ToList();
weatherData.DayOfMonth = Convert.ToInt16(split[Utilities.dayOfMonthIndex]);
weatherData.DayOfWeek = split[Utilities.dayOfWeekIndex].Trim();
weatherData.HighCelcius = Convert.ToDouble(split[Utilities.highCelciusIndex]);
weatherData.LowCelsius = Convert.ToDouble(split[Utilities.lowCelciusIndex]);
weatherData.ChanceOfPrecipitation = Convert.ToInt16(split[Utilities.chanceOfPrecipitationIndex]);
return(weatherData);
}
public List <String> GetPicnicPlan(int?numberOfDays = null)
{
List <DaysWeather> normalizedDaysWeather = new List <DaysWeather>();
List <String> picnicPlanDays = new List <string>();
DateTime datevalue;
if (_filename != null && File.Exists(_filename))
{
try
{
List <String> lines = File.ReadLines(_filename).ToList();
string headerLine = lines.FirstOrDefault();
if (headerLine != null && headerLine.Contains(Utilities.dayOfMonth))
{
List <string> header = headerLine.Split().Where(s => !string.IsNullOrWhiteSpace(s)).ToList();
Utilities.highCelciusIndex = header.IndexOf(Utilities.highCelcius);
Utilities.lowCelciusIndex = header.IndexOf(Utilities.lowCelcius);
Utilities.chanceOfPrecipitationIndex = header.IndexOf(Utilities.chanceOfPrecipitation);
Utilities.dayOfMonthIndex = header.IndexOf(Utilities.dayOfMonth);
Utilities.dayOfWeekIndex = header.IndexOf(Utilities.dayOfWeek);
foreach (var line in lines.Skip(1))
{
DaysWeather dayWeather = Utilities.ParseFileDataToWeatherData(line);
if ((dayWeather.HighCelcius >= _lowTemperatureInC) && (dayWeather.HighCelcius <= _highTemperatureInC) &&
(dayWeather.LowCelsius >= _lowTemperatureInC) && (dayWeather.LowCelsius <= _highTemperatureInC))
{
normalizedDaysWeather.Add(dayWeather);
datevalue = new DateTime(2017, 11, normalizedDaysWeather.FirstOrDefault().DayOfMonth);
}
}
if (normalizedDaysWeather?.Count > 0)
{
List <DaysWeather> bestDaysWeather = new List <DaysWeather>();
if (numberOfDays.HasValue && numberOfDays > 0)
{
bestDaysWeather = PickBestNDaysWeather(normalizedDaysWeather, numberOfDays.GetValueOrDefault());
}
else
{
var groupedDaysWeather = normalizedDaysWeather.OrderBy(x => x.ChanceOfPrecipitation)
.GroupBy(x => x.ChanceOfPrecipitation)
.Select(grp => grp.ToList())
.ToList();
bestDaysWeather = groupedDaysWeather.FirstOrDefault();
}
foreach (DaysWeather dw in bestDaysWeather)
{
datevalue = new DateTime(2017, 11, dw.DayOfMonth);
picnicPlanDays.Add($"{datevalue.ToString("dddd")} the {dw.DayOfMonth}th day of the month is the best day for a picnic.");
}
}
}
else
{
Console.WriteLine($"File header format is not correct to parse the file : {_filename}");
}
}
catch (Exception ex)
{
Console.WriteLine($"Error occured while planning the Picnic Plan : {ex.Message} \r\n {ex.InnerException}");
}
}
else
{
Console.WriteLine(_filename == null ? "File path is missing in the Config" : $"File does not exist in the path {_filename}");
}
return(picnicPlanDays);
}