public static void AddUser <T>(UrlSubscription <T> user)
{
//attempt to get type subscription
SubscriptionsByType subscriptionsByUser;
SubscriptionsByType.TryGetValue(typeof(T), out subscriptionsByUser);
//if unable to get attempt to add
if (subscriptionsByUser == null)
{
subscriptionsByUser = new SubscriptionsByType()
{
SubscriptionType = typeof(T)
};
//add new type subscription
var wasAdded = SubscriptionsByType.TryAdd(typeof(T), subscriptionsByUser);
//if add failed then likely another thread was adding at the same time, try again
if (!wasAdded)
{
AddUser <T>(user);
return;
}
}
//attempt to get user subscription
SubscriptionsByUser subscriptionsByUrl;
subscriptionsByUser.SubscriptionsByUser.TryGetValue(user.ConnectionId, out subscriptionsByUrl);
//if unable to get attempt to add
if (subscriptionsByUrl == null)
{
subscriptionsByUrl = new SubscriptionsByUser()
{
SubscriptionType = typeof(T)
};
//add new type subscription
var wasAdded = subscriptionsByUser.SubscriptionsByUser.TryAdd(user.ConnectionId, subscriptionsByUrl);
//if add failed then likely another thread was adding at the same time, try again
if (!wasAdded)
{
AddUser <T>(user);
return;
}
}
//add or update value with new value
subscriptionsByUrl.SubscriptionsByUrl.AddOrUpdate(user.Url, user, (key, oldValue) => oldValue = user);
}
// DO NOT REMOVE, ACCESSED BY STRING, I KNOW IT'S NASTY
public static List <UserSubscriptionResult> GetSubscribed <T>(SubscriptionsByType subscriptionsByUser, List <ChangedObject> values)
{
var results = new List <UserSubscriptionResult>();
foreach (var user in subscriptionsByUser.SubscriptionsByUser)
{
if (user.Value == null)
{
continue;
}
var userResults = new UserSubscriptionResult
{
ConnectionId = user.Key
};
foreach (var url in user.Value.SubscriptionsByUrl)
{
if (url.Value == null)
{
continue;
}
IURLSubscription interfaceSubscription = url.Value;
UrlSubscription <T> typedSubscription = (UrlSubscription <T>)interfaceSubscription;
foreach (var value in values)
{
var typedObject = (T)value.Object;
if (typedSubscription.Query == null || typedSubscription.Query.Invoke(typedObject))
{
var newUrl = new UrlSubscriptionResults
{
Url = url.Key
};
newUrl.Data.Add(value);
userResults.Urls.Add(newUrl);
}
}
}
if (userResults.Urls.Any())
{
results.Add(userResults);
}
}
return(results);
}
