/// <summary>
/// Calculate how much is saved for a Grocery Item
/// </summary>
/// <param name="numPurchased"></param>
/// <param name="gli"></param>
/// <param name="compoundSavings"></param>
/// <returns></returns>
public decimal CalculateAmountSaved(int numPurchased, GroceryListItem gli, bool compoundSavings)
{
return gli.CalculateSavings(numPurchased, compoundSavings);
}
/// <summary>
/// Calculate initial price for Grocery Item
/// </summary>
/// <param name="itemName"></param>
/// <param name="numItemsPurchased"></param>
/// <param name="gli"></param>
/// <returns></returns>
public decimal CalculatePrice(string itemName, int numItemsPurchased, GroceryListItem gli)
{
return numItemsPurchased * gli.Price;
}
public Dictionary<string, GroceryListItem> ReadRules(string fileName)
{
var itemList = new Dictionary<string, GroceryListItem>();
var rootFolder = AppDomain.CurrentDomain.BaseDirectory;
if (!rootFolder.EndsWith("\\")) rootFolder += "\\";
var filePath = string.Format("{0}AppData\\{1}", rootFolder, fileName);
WriteDebug("FilePath: " + filePath);
if (!File.Exists(filePath))
{
WriteDebug("File not found: " + filePath);
return null;
}
var lines = File.ReadLines(filePath);
foreach (var line in lines)
{
//skip lines commented out
if (line.StartsWith("%") || string.IsNullOrWhiteSpace(line))
continue;
var rules = line.Split(';');
if (rules.Length <= 0) continue;
//first word in line of rules must be item name
var rule = rules[0];
var words = rule.Split(' ');
var currentItem = words[0];
var dollars = Regex.Match(rule, @"\d*\.?\d+").Value;
decimal price;
//check to see if the price is in a string
if (string.IsNullOrWhiteSpace(dollars))
{
long value;
//couldn't get a value for the price
if (!rule.TryParseLong(out value))
{
WriteDebug("No dollar amount was found for " + currentItem);
continue;
}
price = Convert.ToDecimal(value);
}
else if (!decimal.TryParse(dollars, out price))
{
WriteDebug(string.Format("There was an error parsing {0} to decimal!", dollars));
continue;
}
if (rule.Contains("cents") && price > 0)
price = price/100;
var gli = new GroceryListItem(currentItem, price);
//get all pricing rules for list item
for (var i = 1; i < rules.Length; i++)
{
var pricingRule = GetPricingRule(rules[i]);
if (pricingRule == null) continue;
gli.PricingRules.Add(pricingRule);
}
//store item in dictionary with lower case singular name
var listNameForItem = currentItem.Singularize();
itemList[listNameForItem.ToLower()] = gli;
}
return itemList;
}