public static ISet <Yarn> ExtractYarnCounts(List <Customer> customers)
{
HashSet <Yarn> yarnTotal = new HashSet <Yarn>();
List <Yarn> combinedYarnOrders = extractListOfYarn(customers);
for (var i = 0; i < combinedYarnOrders.Count; i++)
{
var yarn1 = combinedYarnOrders[i];
for (var j = i + 1; j < combinedYarnOrders.Count; j++)
{
var yarn2 = combinedYarnOrders[j];
if (!ReferenceEquals(yarn1, yarn2))
{
if (Yarn.AreEquivalent(yarn1, yarn2))
{
yarn1 += yarn2;
combinedYarnOrders.RemoveAt(j);
}
}
}
yarnTotal.Add(yarn1);
}
return(yarnTotal);
}
public static bool AreEquivalent(Yarn yarn1, Yarn yarn2)
{
return(yarn1.IsMiniSkein == yarn2.IsMiniSkein &&
yarn1.YarnType == yarn2.YarnType &&
yarn1.YarnTypeDescription == yarn2.YarnTypeDescription &&
yarn1.Color == yarn2.Color);
}
public static Yarn operator +(Yarn yarn, Yarn addend)
{
if (AreEquivalent(yarn, addend))
{
double sum = yarn.NumberOfSkeins + addend.NumberOfSkeins;
Yarn newYarn = new Yarn()
{
NumberOfSkeins = sum, YarnType = yarn.YarnType, YarnTypeDescription = yarn.YarnTypeDescription, Color = yarn.Color
};
return(newYarn);
}
throw new ArgumentException("Yarn are different types");
}
public static (YarnType, double) ModifyValuesForMiniSkeins(string yarnDescription, double quantity,
YarnType yarnType)
{
if (Yarn.DetermineIfMiniSkein(yarnDescription))
{
double conversionConstant = yarnType.GetMiniConversionConstant();
quantity *= conversionConstant;
YarnType miniType = yarnType.GetCorrespondingMiniType();
return(miniType, quantity);
}
return(yarnType, quantity);
}
public static List <Customer> GenerateCustomers(Stream stream)
{
var customers = new List <Customer>();
using (var reader = new StreamReader(stream))
{
using (var csv = new CsvReader(reader))
{
bool yarnDataParsable = false;
Customer currentCustomer = null;
while (csv.Read())
{
String[] line = csv.Parser.Context.Record;
if (line.Contains("Quantity"))
{
csv.ReadHeader();
yarnDataParsable = true;
}
if (yarnDataParsable)
{
var firstEntryOfLine = csv.Parser.Context.Record[0];
if ((firstEntryOfLine != String.Empty) && (IsTotalLine(firstEntryOfLine) == false))
{
string customerName = firstEntryOfLine;
currentCustomer = new Customer()
{
Name = customerName
};
customers.Add(currentCustomer);
continue;
}
if (currentCustomer != null)
{
try
{
Yarn yarn = Yarn.CreateYarnFromCSV(csv);
currentCustomer.Order.Add(yarn);
}
catch (MissingFieldException) { }
}
}
}
}
}
return(customers);
}
public override bool Equals(object obj)
{
if ((obj == null) || this.GetType() != obj.GetType())
{
return(false);
}
else
{
Yarn yarn = (Yarn)obj;
return((this.YarnType == yarn.YarnType) &&
(this.Color == yarn.Color) &&
(this.YarnTypeDescription.Equals((yarn.YarnTypeDescription))) &&
(this.IsMiniSkein == yarn.IsMiniSkein));
}
}
public static Yarn CreateYarnFromText(CsvReader reader)
{
double quantity = reader.GetField <double>(1);
YarnType yarnType = YarnFactory.CreateYarnTypeFromText(reader.GetField <String>(2));
String yarnTypeDescription = reader.GetField <String>(3);
(yarnType, quantity) = YarnFactory.ModifyValuesForMiniSkeins(yarnTypeDescription, quantity, yarnType);
Yarn yarn = new Yarn(quantity, yarnType, yarnTypeDescription);
if (reader.TryGetField <String>(4, out String colorName))
{
yarn.Color = colorName;
}
return(yarn);
}
public static Yarn CreateYarnFromText(string inputText)
{
inputText = inputText.TrimStart(',');
String[] inputs = inputText.Split(',');
double quantity = double.Parse(inputs[0]);
YarnType yarnType = YarnFactory.CreateYarnTypeFromText(inputs[1]);
String yarnTypeDescription = inputs[2];
(yarnType, quantity) = YarnFactory.ModifyValuesForMiniSkeins(yarnTypeDescription, quantity, yarnType);
Yarn yarn = new Yarn(quantity, yarnType, yarnTypeDescription);
if (inputs.Length > 3)
{
yarn.Color = inputs[3];
}
return(yarn);
}
