public void AssertSubscriber(string userName, IEnumerable <Uri> topicsOfInterest)
{
try {
var ctx = new EventFeedContext(_connectionString);
// check if we have one
if (ctx.Subscribers.Where(s => s.UserName.Equals(userName)).Count() > 0)
{
return;
}
var subscriber = ctx.Subscribers.Create();
subscriber.UserName = userName;
var topics = new List <ITopic>();
foreach (var topicId in topicsOfInterest)
{
var topic = ctx.Topics.Where(t => t.Id.Equals(topicId)).ToList().FirstOrDefault();
if (topic != null)
{
topics.Add(topic);
}
}
subscriber.Topics = topics;
ctx.SaveChanges();
}
catch (Exception ex)
{
throw new Exception("Error in RegisterSubscriber", ex);
}
}
public void AssertTopic(Uri topicId, string label, string description)
{
try {
var ctx = new EventFeedContext(_connectionString);
var topic = ctx.Topics.Where(t => t.Id.Equals(topicId)).ToList().FirstOrDefault();
if (topic != null)
{
// if the topic already exists but we dont have or have different
// labels and desc then update them.
if (!topic.Label.Equals(label)) topic.Label = label;
if (!topic.Description.Equals(description)) topic.Description = description;
if (((BrightstarEntityObject)topic).IsModified)
{
ctx.SaveChanges();
}
}
else
{
// create a new one
var newTopic = new Topic {Id = topicId.ToString(), Description = description, Label = label};
ctx.Topics.Add(newTopic);
ctx.SaveChanges();
}
} catch (Exception ex){
throw new Exception("Error in AssertTopic", ex);
}
}
public void AssertSubscriber(string userName, IEnumerable<Uri> topicsOfInterest)
{
try {
var ctx = new EventFeedContext(_connectionString);
// check if we have one
if (ctx.Subscribers.Where(s => s.UserName.Equals(userName)).Count() > 0)
{
return;
}
var subscriber = ctx.Subscribers.Create();
subscriber.UserName = userName;
var topics = new List<ITopic>();
foreach (var topicId in topicsOfInterest)
{
var topic = ctx.Topics.Where(t => t.Id.Equals(topicId)).ToList().FirstOrDefault();
if (topic != null)
{
topics.Add(topic);
}
}
subscriber.Topics = topics;
ctx.SaveChanges();
}
catch (Exception ex)
{
throw new Exception("Error in RegisterSubscriber", ex);
}
}
/// <summary>
/// Gets all the events on the subscriber timeline. Optional parameters are since and also how many
/// </summary>
/// <param name="userName">Gets timeline for user</param>
/// <param name="since">Events since this data should be included</param>
/// <returns>Enumeration of events</returns>
public IEnumerable <IEvent> GetSubscriberTimeline(string userName, DateTime since)
{
try
{
var ctx = new EventFeedContext(_connectionString);
var sub = ctx.Subscribers.Where(s => s.UserName.Equals(userName)).ToList().FirstOrDefault();
if (sub == null)
{
throw new Exception("Subscriber does not exist");
}
return(sub.Events.Where(e => e.Occurred > since).OrderBy(e => e.Occurred));
} catch (Exception ex) {
throw new Exception("Error in GetSubscriberTimeline", ex);
}
}
public IEnumerable <IEvent> GetTopicTimeline(string topicId, DateTime since)
{
try
{
var ctx = new EventFeedContext(_connectionString);
var topic = ctx.Topics.Where(t => t.Id.Equals(topicId)).ToList().FirstOrDefault();
if (topic == null)
{
return(new List <IEvent>());
}
return(topic.Events.Where(e => e.Occurred > since).OrderBy(e => e.Occurred));
}
catch (Exception ex)
{
throw new Exception("Error in GetTopicTimeline", ex);
}
}
/// <summary>
/// Creates a new event and also connects it to all users that are subscribed to any of the topics it is classified by.
/// </summary>
/// <param name="description">Event description</param>
/// <param name="when">Date when the event occured</param>
/// <param name="topicIds">A list of the topic ids that classify this event</param>
/// <param name="eventProperties">A name value collection of all event properties</param>
/// <returns></returns>
public void RaiseEvent(string description, DateTime when, IEnumerable <string> topicIds, Dictionary <string, object> eventProperties = null)
{
try {
// create a new event
var ctx = new EventFeedContext(_connectionString);
var e = ctx.Events.Create();
e.Description = description;
e.Occurred = when;
var topics = new List <ITopic>();
foreach (var topicId in topicIds)
{
var topic = ctx.Topics.Where(t => t.Id.Equals(topicId)).ToList().FirstOrDefault();
if (topic != null)
{
topics.Add(topic);
// get all the subscribers
foreach (var subscriber in topic.Subscribers)
{
subscriber.Events.Add(e);
}
}
}
e.Topics = topics;
ctx.SaveChanges();
if (eventProperties != null)
{
// use a dynamic object to store all the other properties
var dynaStore = GetDynaStore();
var dynaEvent = dynaStore.GetDataObject(e.Id);
foreach (var key in eventProperties.Keys)
{
dynaEvent[key] = eventProperties[key];
}
dynaStore.SaveChanges();
}
}
catch (Exception ex)
{
throw new Exception("Error in RasieEvent", ex);
}
}
public void RemoveInterest(string userName, string topicId)
{
var ctx = new EventFeedContext(_connectionString);
var topic = ctx.Topics.Where(t => t.Id.Equals(topicId)).ToList().FirstOrDefault();
var subscriber = ctx.Subscribers.Where(s => s.UserName.Equals(userName)).ToList().FirstOrDefault();
if (topic == null)
{
throw new Exception("No topic with id");
}
if (subscriber == null)
{
throw new Exception("No subscriber with name provided");
}
subscriber.Topics.Remove(topic);
ctx.SaveChanges();
}
public void AssertTopic(Uri topicId, string label, string description)
{
try {
var ctx = new EventFeedContext(_connectionString);
var topic = ctx.Topics.Where(t => t.Id.Equals(topicId)).ToList().FirstOrDefault();
if (topic != null)
{
// if the topic already exists but we dont have or have different
// labels and desc then update them.
if (!topic.Label.Equals(label))
{
topic.Label = label;
}
if (!topic.Description.Equals(description))
{
topic.Description = description;
}
if (((BrightstarEntityObject)topic).IsModified)
{
ctx.SaveChanges();
}
}
else
{
// create a new one
var newTopic = new Topic {
Id = topicId.ToString(), Description = description, Label = label
};
ctx.Topics.Add(newTopic);
ctx.SaveChanges();
}
} catch (Exception ex) {
throw new Exception("Error in AssertTopic", ex);
}
}
public void RemoveInterest(string userName, string topicId)
{
var ctx = new EventFeedContext(_connectionString);
var topic = ctx.Topics.Where(t => t.Id.Equals(topicId)).ToList().FirstOrDefault();
var subscriber = ctx.Subscribers.Where(s => s.UserName.Equals(userName)).ToList().FirstOrDefault();
if (topic == null) { throw new Exception("No topic with id"); }
if (subscriber == null) throw new Exception("No subscriber with name provided");
subscriber.Topics.Remove(topic);
ctx.SaveChanges();
}
/// <summary>
/// Creates a new event and also connects it to all users that are subscribed to any of the topics it is classified by.
/// </summary>
/// <param name="description">Event description</param>
/// <param name="when">Date when the event occured</param>
/// <param name="topicIds">A list of the topic ids that classify this event</param>
/// <param name="eventProperties">A name value collection of all event properties</param>
/// <returns></returns>
public void RaiseEvent(string description, DateTime when, IEnumerable<string> topicIds, Dictionary<string, object> eventProperties = null)
{
try {
// create a new event
var ctx = new EventFeedContext(_connectionString);
var e = ctx.Events.Create();
e.Description = description;
e.Occurred = when;
var topics = new List<ITopic>();
foreach (var topicId in topicIds)
{
var topic = ctx.Topics.Where(t => t.Id.Equals(topicId)).ToList().FirstOrDefault();
if (topic != null)
{
topics.Add(topic);
// get all the subscribers
foreach (var subscriber in topic.Subscribers)
{
subscriber.Events.Add(e);
}
}
}
e.Topics = topics;
ctx.SaveChanges();
if (eventProperties != null)
{
// use a dynamic object to store all the other properties
var dynaStore = GetDynaStore();
var dynaEvent = dynaStore.GetDataObject(e.Id);
foreach (var key in eventProperties.Keys)
{
dynaEvent[key] = eventProperties[key];
}
dynaStore.SaveChanges();
}
}
catch (Exception ex)
{
throw new Exception("Error in RasieEvent", ex);
}
}
public IEnumerable<IEvent> GetTopicTimeline(string topicId, DateTime since)
{
try
{
var ctx = new EventFeedContext(_connectionString);
var topic = ctx.Topics.Where(t => t.Id.Equals(topicId)).ToList().FirstOrDefault();
if (topic == null) return new List<IEvent>();
return topic.Events.Where(e => e.Occurred > since).OrderBy(e => e.Occurred);
}
catch (Exception ex)
{
throw new Exception("Error in GetTopicTimeline", ex);
}
}
/// <summary>
/// Gets all the events on the subscriber timeline. Optional parameters are since and also how many
/// </summary>
/// <param name="userName">Gets timeline for user</param>
/// <param name="since">Events since this data should be included</param>
/// <returns>Enumeration of events</returns>
public IEnumerable<IEvent> GetSubscriberTimeline(string userName, DateTime since)
{
try
{
var ctx = new EventFeedContext(_connectionString);
var sub = ctx.Subscribers.Where(s => s.UserName.Equals(userName)).ToList().FirstOrDefault();
if (sub == null) throw new Exception("Subscriber does not exist");
return sub.Events.Where(e => e.Occurred > since).OrderBy(e => e.Occurred);
} catch (Exception ex){
throw new Exception("Error in GetSubscriberTimeline", ex);
}
}
