public static IItem Parse(string[] input)
{
Dictionary<string, string> keyValuePairs = new Dictionary<string, string>();
for (int index = 3; index < input.Length; index++)
{
string[] splittedParams = input[index].Split('=');
keyValuePairs[splittedParams[0]] = splittedParams[1];
}
string id = keyValuePairs["id"];
string title = keyValuePairs["title"];
decimal price = Decimal.Parse(keyValuePairs["price"]);
string genre = keyValuePairs["genre"];
IItem item;
switch (input[1])
{
case "book":
string author = keyValuePairs["author"];
item = new Book(id, title, price, author, genre);
break;
case "movie":
int length = int.Parse(keyValuePairs["length"]);
item = new Movie(id, title, price, length, genre);
break;
case "game":
if (keyValuePairs.ContainsKey("ageRestriction"))
{
AgeRestriction restriction = (AgeRestriction)Enum.Parse(typeof(AgeRestriction), keyValuePairs["ageRestriction"]);
item = new Game(id, title, price, genre, restriction);
}
else
{
item = new Game(id, title, price, genre);
}
break;
default:
throw new ArgumentException("There is no such item");
}
return item;
}
private void ExecuteSupplyCommand(string itemType, string paramsString, int quantity)
{
var itemParams = GetItemParams(paramsString);
switch (itemType)
{
case "book":
{
string id = itemParams["id"];
string title = itemParams["title"];
string author = itemParams["author"];
decimal price = decimal.Parse(itemParams["price"]);
string genre = itemParams["genre"];
var book = new Book(id, title, price, author, genre);
this.AddToSupplies(book, quantity);
break;
}
case "video":
{
string id = itemParams["id"];
string title = itemParams["title"];
decimal price = decimal.Parse(itemParams["price"]);
string genre = itemParams["genre"];
int length = int.Parse(itemParams["length"]);
var video = new Video(id, title, price, length, genre);
this.AddToSupplies(video, quantity);
break;
}
case "game":
{
string id = itemParams["id"];
string title = itemParams["title"];
decimal price = decimal.Parse(itemParams["price"]);
string genre = itemParams["genre"];
AgeRestriction ageRestriction = ToEnum(itemParams["ageRestriction"]);
var game = new Game(id, title, price, genre, ageRestriction);
this.AddToSupplies(game, quantity);
break;
}
default:
throw new ArgumentException("Invalid item type.");
}
}