/// <summary>
/// Filters the by criteria.
/// </summary>
/// <param name="collection">The collection.</param>
/// <param name="filter">The filter.</param>
/// <param name="orderBy">The order by.</param>
/// <returns></returns>
public TweetDataContract FilterByCriteria(
IQueryable <Tweet> collection,
System.Linq.Expressions.Expression <Func <Tweet, bool> > filter = null,
Func <IQueryable <Tweet>, IOrderedQueryable <Tweet> > orderBy = null)
{
IQueryable <Tweet> resultSet = collection;
TweetDataContract dataContract = new TweetDataContract();
if (filter != null)
{
resultSet = resultSet.Where(filter);
}
if (orderBy != null)
{
resultSet = orderBy(resultSet);
}
dataContract.TimeLine = resultSet;
// make sure Tweet Body is not empty
dataContract.TotalTweets = resultSet.Where(i => i.Text != string.Empty).GroupBy(i => i.User.ScreenName)
.Select(group => new
{
name = group.Key,
count = group.Count()
}).ToDictionary(key => key.name, value => value.count);
// make sure enitities -> userMentions are NOT empty
dataContract.UserMentions = resultSet.Where(i => i.Entities.UserMentions != null).GroupBy(i => i.User.ScreenName)
.Select(group => new
{
name = group.Key,
count = group.Sum(a => a.Entities.UserMentions.Count(w => w.ScreenName != @group.Key))
}).ToDictionary(key => key.name, value => value.count);
return(dataContract);
}
/// <summary>
/// Gets the aggregated results.
/// </summary>
/// <param name="accounts">The accounts.</param>
/// <returns></returns>
public TweetDataContract GetAggregatedResults(string[] accounts)
{
for (int i = 0; i < accounts.Length; i++)
{
if (string.IsNullOrWhiteSpace(accounts[i]))
{
throw new NoNullAllowedException("Not a valid account name");
}
}
List <IEnumerable <Tweet> > timeLineCollection = accounts.Select(this.GetTweets).ToList();
var mergedTimelines = this._twitterRepository.AggregateTimeLine(timeLineCollection);
var twoWeeksAgo = DateTime.Now.AddDays(-14);
// pass our conditions two weeks period and order by date
TweetDataContract results =
this._twitterRepository.FilterByCriteria(mergedTimelines,
a => a.CreatedAt >= twoWeeksAgo,
a => a.OrderByDescending(d => d.CreatedAt));
return(results);
}
public ActionResult RawData()
{
TweetDataContract contract = this._service.GetAggregatedResults(this._accounts);
return(Json(contract, JsonRequestBehavior.AllowGet));
}
// GET: /Home/
public ActionResult Index()
{
TweetDataContract contract = this._service.GetAggregatedResults(this._accounts);
return(View(contract));
}
