/// <summary>
/// Gets the collection of terminal elements that can appear as the first element
/// after the dot in the given LR Item. If next element, named T, is a terminal, then First(item) = {T}
/// </summary>
/// <example>
/// With Grammar:
/// S -> A
/// A -> A + B
/// A -> a
/// B -> b
/// First(S -> •A): {'a'}
/// First(A -> •A + B): {'a'}
/// First(A -> A • + B): {'+'}
/// First(B -> b): {'b'}
/// </example>
/// <param name="item"></param>
/// <returns></returns>
public IEnumerable <Terminal <T> > First(LRItem <T> item)
{
//get the next element and evaluate if it is a terminal or non terminal
GrammarElement <T> nextElement = item.GetNextElement();
//if nextElement is a Terminal then return {T}
if (nextElement is Terminal <T> )
{
return new[] { (Terminal <T>)nextElement }
}
;
//otherwise find all of the productions that have nextElement on the LHS.
Production <T> production = Productions.First(p => p.NonTerminal == item.LeftHandSide && p.DerivedElements.SequenceEqual(item.ProductionElements));
var firstElements = new List <Terminal <T> >();
if (production.DerivedElements.Count > 0)
{
if (!production.DerivedElements[item.DotIndex].Equals(production.NonTerminal))
{
GrammarElement <T> productionItem = production.GetElement(item.DotIndex);
if (productionItem != null)
{
//if it is a Terminal add to first elements
if (productionItem is Terminal <T> )
{
firstElements.Add((Terminal <T>)productionItem);
}
//otherwise add First(new LRItem(production)) of all of the productions where the LHS == productionItem
else
{
foreach (LRItem <T> i in Productions.Where(p => p.NonTerminal.Equals(productionItem)).Select(p => new LRItem <T>(0, p)))
{
firstElements.AddRange(First(i));
}
}
}
}
}
return(firstElements.Distinct());
}
public static void LoadLogs()
{
var vidlog = new VideoLog();
dynamic productions = new Productions();
dynamic episodes = new Episodes();
dynamic orderItems = new OrderItems();
dynamic channels = new Channels();
var orders = new Orders();
var rand = new Random();
Console.WriteLine("Deleting logs...");
vidlog.Delete();
foreach (var order in orders.All())
{
//pull the orderItems
var items = orderItems.Find(OrderID: order.ID);
//loop the items
foreach (var item in items)
{
var slug = item.SKU;
if (slug == "yearly")
{
Console.WriteLine("Loading Productions and Episodes for Annual...");
//create a download log for each production and episode
foreach (var p in productions.All())
{
var eps = episodes.Find(ProductionID: p.ID);
foreach (var e in eps)
{
var log = new {
Slug = item.SKU,
EpisodeNumber = e.Number,
Email = order.Email,
//the download file for the episode
FileName = p.Slug + "_" + e.Number + ".zip",
FileSize = e.HDFileSize,
//1 day lag
LogDate = order.CreatedAt.AddDays(1),
OrderItemID = item.ID
};
vidlog.Insert(log);
}
}
}
else if (slug == "monthly")
{
//create a stream log for each production and episode
Console.WriteLine("Loading Productions and Episodes for Monthly...");
foreach (var p in productions.All())
{
var eps = episodes.Find(ProductionID: p.ID);
foreach (var e in eps)
{
var log = new {
Slug = item.SKU,
EpisodeNumber = e.Number,
Email = order.Email,
//the download file for the episode
FileName = p.Slug + "_" + e.Number + ".flv",
FileSize = e.StreamFileSize,
//1 day lag
LogDate = order.CreatedAt.AddDays(1),
OrderItemID = item.ID
};
vidlog.Insert(log);
}
}
}
else
{
var p = productions.First(Slug: item.SKU);
var eps = episodes.Find(ProductionID: p.ID);
Console.WriteLine("Loading log for {0}...", p.Slug);
foreach (var e in eps)
{
var log = new {
Slug = item.SKU,
EpisodeNumber = e.Number,
Email = order.Email,
//the download file for the episode
FileName = p.Slug + "_" + e.Number + ".zip",
FileSize = e.HDFileSize,
//1 day lag
LogDate = order.CreatedAt.AddDays(1),
OrderItemID = item.ID
};
vidlog.Insert(log);
}
}
}
}
}