// process all tweets in tweetStringQueue
void Parse()
{
while ( true )
{
while ( !isParsingPaused && tweetStringQueue.Count > 0 )
{
string newTweetStr = tweetStringQueue.Dequeue();
try
{
JSONObject newObj = new JSONObject( newTweetStr );
if ( newObj.HasProperty( "text" ) )
{
Tweet newTweet = new Tweet( newObj );
tweets.Enqueue ( newTweet );
}
else if ( newObj.HasProperty ( "limit" ) )
curLimit = newObj.GetProperty( "limit" ).GetProperty ( "track" ).n;
else
Console.WriteLine ( "Unrecognised (valid) JSON object in stream" );
}
catch
{
Console.WriteLine( "Invalid object in json string" );
}
}
Thread.Sleep ( 100 );
}
}
// extract coords from location object
public static Coordinates[] GetLocationData( JSONObject locationObj )
{
try
{
if ( locationObj.HasProperty( "coordinates" ) )
{
List<JSONObject> coords = locationObj.GetProperty ( "coordinates" ).props;
if ( coords.Count % 2 != 0 )
throw new System.Exception( "Wrong coordinate setup?" );
Coordinates[] toRet = new Coordinates[ coords.Count / 2 ];
for ( int i = 0; i < coords.Count; i += 2 )
{
toRet[i] = new Coordinates( (float)coords[i+1].n, (float)coords[i].n );
}
return toRet;
}
throw new System.Exception( "wrong geo type" );
} catch ( System.Exception e )
{
Console.WriteLine( "Location error:" + e.Message );
return new Coordinates[2];
}
}
// Make tweet object from JSON
public Tweet( JSONObject jsonTweet )
{
if ( jsonTweet.type != JSONObject.Type.OBJECT )
throw new System.Exception( "Non-valid JSON object" );
status = jsonTweet.GetProperty ( "text" ).str;
user = jsonTweet.GetProperty ( "user" );
JSONObject name = user.GetProperty ( "screen_name" );
userName = name.str;
JSONObject fullNameObj = user.GetProperty ( "name" );
fullName = fullNameObj.str;
JSONObject avatarObj = user.GetProperty ( "profile_image_url" );
avatarURL = DecodeStream.CleanString ( avatarObj.str );
location = jsonTweet.GetProperty( "geo" );
if ( location.type == JSONObject.Type.NULL )
location = jsonTweet.GetProperty( "coordinates" );
// to add parsing for 'place' tagged tweets
if ( location.type != JSONObject.Type.NULL )
coords = GetLocationData( location );
entities = jsonTweet.GetProperty ( "entities" );
JSONObject hashtags = entities.GetProperty( "hashtags" );
if ( hashtags.type != JSONObject.Type.NULL && hashtags.props.Count > 0 )
{
tags = new string[ hashtags.props.Count ];
for ( int i = 0; i < tags.Length; i++ )
tags[i] = hashtags.props[i].GetProperty ( "text" ).str;
}
else
tags = new string [0];
}
