/// <summary>
/// Gets all the users tweets.
/// </summary>
/// <returns></returns>
public IList<Tweet> GetAllTweets()
{
List<Tweet> tweets = new List<Tweet>();
TwitterService twitterService = new TwitterService(AuthenticationTokens.TwitterConsumerKey, AuthenticationTokens.TwitterConsumerSecret);
twitterService.AuthenticateWith(AuthenticationTokens.TwitterConsumerKey, AuthenticationTokens.TwitterConsumerSecret,
_authentication.AccessToken, _authentication.AccessTokenSecret);
TwitterUser twitterUser = twitterService.VerifyCredentials();
//ListTweetsOnHomeTimeline only returns 200 (or 800?) results each go. Need to send the requests a few times per hour
//with the paging/counts set?
IEnumerable<TwitterStatus> returnedTweets = null;
//try it a few times
int retryCount = 0;
while (returnedTweets == null)
{
returnedTweets = twitterService.ListTweetsOnHomeTimeline(200);
retryCount++;
//give up after 5 retries
if (retryCount == 5)
return tweets;
}
foreach (var returnedTweet in returnedTweets)
{
Tweet tweet = new Tweet();
TwitterStatus statusToExamine = returnedTweet;
if (returnedTweet.RetweetedStatus != null)
{
statusToExamine = returnedTweet.RetweetedStatus;
}
tweet.Author = new Linker() { Id = statusToExamine.Author.ScreenName, Name = statusToExamine.Author.ScreenName };
tweet.Content = statusToExamine.Text;
tweet.DatePosted = statusToExamine.CreatedDate;
tweet.TweetId = statusToExamine.Id;
tweet.ReTweetCount = GetRetweetCountFromRawData(statusToExamine.RawSource);
tweets.Add(tweet);
}
return tweets;
}
/// <summary>
/// Updates the date indexed to be now.
/// </summary>
public void UpdateDateIndexed(Tweet tweetToUpdate)
{
FSDirectory tweetDirectory = FSDirectory.Open(new DirectoryInfo(Settings.TWEET_INDEX_DIR));
IndexWriter tweetWriter = new IndexWriter(tweetDirectory, _analyzer, IndexWriter.MaxFieldLength.UNLIMITED);
//update the date indexed on the tweet
Document existingTweet = _searchengine.GetDocumentForTweetId(tweetToUpdate.TweetId);
//update the field when it was updated
Field dateUpdated = existingTweet.GetField(Settings.FIELD_TWEET_DATE_INDEXED);
dateUpdated.SetValue(DateTime.Now.ToString());
tweetWriter.UpdateDocument(new Term(Settings.FIELD_TWEET_ID, existingTweet.GetField(Settings.FIELD_TWEET_ID).StringValue()), existingTweet);
tweetWriter.Close();
}
/// <summary>
/// Indexes all the urls in the supplied tweet
/// </summary>
public void IndexUrlsInTweet(Tweet tweet, IList<string> indexes)
{
//find urls to index in the url index
foreach (Uri uri in tweet.GetUrlsFromTweet())
{
Console.WriteLine("URL" + uri);
//setup index writer
FSDirectory luceneDirectory = FSDirectory.Open(new DirectoryInfo(Settings.URL_INDEX_DIR));
IndexWriter writer = new IndexWriter(luceneDirectory, _analyzer, IndexWriter.MaxFieldLength.UNLIMITED);
//need to check if its not already indexed
//if it is already indexed, then just add a user to the index field in lucene
Document existingDoc = _searchengine.GetDocumentForUrl(uri.ToString());
if (existingDoc != null)
{
//document already exists, add a user to it.
Console.WriteLine("Already Exists");
bool wasUpdated = false;
wasUpdated |= UpdateIndexes(existingDoc, indexes);
wasUpdated |= UpdateTweets(existingDoc, tweet.TweetId);
//only update document if it was changed.
if (wasUpdated)
writer.UpdateDocument(new Term(Settings.FIELD_URL_ID, existingDoc.GetField(Settings.FIELD_URL_ID).StringValue()), existingDoc);
writer.Close();
continue;
}
Document luceneDocument = IndexUrl(uri, indexes, tweet.TweetId);
if (luceneDocument != null)
writer.AddDocument(luceneDocument);
writer.Optimize();
writer.Close();
}
//update the date indexed on the tweet
_tweetIndexer.UpdateDateIndexed(tweet);
}
/// <summary>
/// Indexes a tweet in the TweetIndex
/// Checks if it is new, if not, it will update the index list with the indexId
/// If it is new, it will set it as unprocessed so the UrlIndexer will read it
/// </summary>
public void IndexTweet(Tweet tweetToIndex, string indexId)
{
//setup index writing
FSDirectory tweetDirectory = FSDirectory.Open(new DirectoryInfo(Settings.TWEET_INDEX_DIR));
IndexWriter tweetWriter = new IndexWriter(tweetDirectory, _analyzer, IndexWriter.MaxFieldLength.UNLIMITED);
//check the tweet is not already indexed.
Document existingTweet = _searchengine.GetDocumentForTweetId(tweetToIndex.TweetId);
//if the tweet doens't exist, index it.
if (existingTweet == null)
{
Document tweetDocument = IndexTweetDetails(tweetToIndex, indexId);
tweetWriter.AddDocument(tweetDocument);
}
else
{
//update the index
UpdateIndexForDocument(indexId, existingTweet);
}
tweetWriter.Optimize();
tweetWriter.Close();
}
/// <summary>
/// Gets the lucene document for a certain tweet
/// </summary>
private Document IndexTweetDetails(Tweet tweet, string indexId)
{
Document luceneDocument = new Document();
Field textField = new Field(Settings.FIELD_TWEET_TEXT, tweet.Content, Field.Store.YES, Field.Index.ANALYZED);
Field idField = new Field(Settings.FIELD_TWEET_ID, tweet.TweetId.ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED);
Field linkerNameField = new Field(Settings.FIELD_TWEET_LINKER_ID, tweet.Author.Name, Field.Store.YES, Field.Index.NOT_ANALYZED);
Field linkerIdField = new Field(Settings.FIELD_TWEET_LINKER_NAME, tweet.Author.Id, Field.Store.YES, Field.Index.NOT_ANALYZED);
Field linkerRepField = new Field(Settings.FIELD_TWEET_LINKER_REP, tweet.Author.ReputationScore.ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED);
Field datePostedField = new Field(Settings.FIELD_TWEET_DATE_POSTED, tweet.DatePosted.ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED);
Field dateUpdatedField = new Field(Settings.FIELD_TWEET_DATE_INDEXED, "0", Field.Store.YES, Field.Index.NOT_ANALYZED);
Field indexField = new Field(Settings.FIELD_TWEET_INDEXES, indexId.ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED);
luceneDocument.Add(textField);
luceneDocument.Add(idField);
luceneDocument.Add(linkerNameField);
luceneDocument.Add(linkerRepField);
luceneDocument.Add(linkerIdField);
luceneDocument.Add(datePostedField);
luceneDocument.Add(dateUpdatedField);
luceneDocument.Add(indexField);
return luceneDocument;
}
/// <summary>
/// Parses the message.
/// </summary>
/// <param name="p">The p.</param>
private void ParseMessage(string p, string indexIdentifier )
{
// Console.WriteLine(p);
JObject obj = (JObject)JsonConvert.DeserializeObject(p);
//check its an update
var status = obj.SelectToken("user", false);
if (status != null)
{
var urls = obj.SelectToken("entities.urls", false);
if (urls.HasValues)
{
//it has a URL
Console.WriteLine(urls[0]["url"]);
Tweet tweet = new Tweet();
tweet.Author = new Linker()
{
Id = obj.SelectToken("user.id", false).ToString(),
Name = (string)obj.SelectToken("user.screen_name", false)
};
tweet.Content = (string)obj.SelectToken("text", false);
tweet.TweetId = (long) obj.SelectToken("id", false);
tweet.DatePosted = Tweet.GetDateTimeFromTwitterFormat((string)obj["created_at"]);
tweet.ReTweetCount = (int)obj.SelectToken("retweet_count", false);
System.Diagnostics.Debug.WriteLine(tweet.Content);
//get the index
//TODO: when site streaming activated updated it for this
//string indexIdentifier = (string) obj.SelectToken("for_user", false);
_tweetIndexer.IndexTweet(tweet, indexIdentifier);
}
}
System.Diagnostics.Debug.WriteLine("Message: {0}", new object[] { obj.ToString() });
}
/// <summary>
/// Extracts the tweet from the document fields
/// </summary>
private Tweet GetTweetFromDocument(Document tweetDoc)
{
Tweet tweet = new Tweet();
tweet.Content = tweetDoc.GetField(Settings.FIELD_TWEET_TEXT).StringValue();
tweet.TweetId = long.Parse(tweetDoc.GetField(Settings.FIELD_TWEET_ID).StringValue());
tweet.DatePosted = DateTime.Parse(tweetDoc.GetField(Settings.FIELD_TWEET_DATE_POSTED).StringValue());
tweet.Author = new Linker();
tweet.Author.Id = tweetDoc.GetField(Settings.FIELD_TWEET_LINKER_ID).StringValue();
tweet.Author.Name = tweetDoc.GetField(Settings.FIELD_TWEET_LINKER_NAME).StringValue();
tweet.Author.ReputationScore = double.Parse(tweetDoc.GetField(Settings.FIELD_TWEET_LINKER_REP).StringValue());
return tweet;
}
