public async Task init(String tag, DateTime start)
{
hashtag = tag;
startTime = start;
twitter = new TwitterDataSource(tag, start);
await twitter.init();
// make sure we have a network connection and some data:
if ((noNetwork = twitter.noNetwork) || (noData = twitter.noData))
{
return;
}
// start timer:
timer = new TwitterTimer(start);
// start clock display:
dispatcherTimer = new DispatcherTimer();
dispatcherTimer.Tick += dispatcherTimer_Tick;
dispatcherTimer.Interval = new TimeSpan(0, 0, 1);
dispatcherTimer.Start();
listView.ItemsSource = twitter;
lastRefresh = DateTime.Now;
}
public async Task findStartID(DateTime date)
{
// var lowerBound = date.ToUniversalTime().Date;
// var upperBound = lowerBound.AddDays(1);
var upperBound = DateTime.UtcNow.Date;
var lowerBound = upperBound.AddDays(-1);
var dayStart = date.ToUniversalTime().Date;
var httpClient = new HttpClient(new HttpClientHandler
{
AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
});
// lower bound:
var request = new HttpRequestMessage(HttpMethod.Get, String.Format(
"https://api.twitter.com/1.1/search/tweets.json?q=a&count=1&until={0:yyyy-MM-dd}&include_entities=false", lowerBound));
request.Headers.Add("Authorization", "Bearer " + accessToken);
HttpResponseMessage response = await httpClient.SendAsync(request);
var json = await response.Content.ReadAsStringAsync();
var results = JsonConvert.DeserializeObject <TwitterSearchResults>(json);
var lowerBoundID = results.statuses[0].id;
DateTime lowerDate = DateTime.ParseExact(results.statuses[0].created_at, "ddd MMM dd HH:mm:ss zzz yyyy", CultureInfo.InvariantCulture);
// upper bound:
request = new HttpRequestMessage(HttpMethod.Get, String.Format(
"https://api.twitter.com/1.1/search/tweets.json?q=a&count=1&until={0:yyyy-MM-dd}&include_entities=false", upperBound));
request.Headers.Add("Authorization", "Bearer " + accessToken);
response = await httpClient.SendAsync(request);
json = await response.Content.ReadAsStringAsync();
results = JsonConvert.DeserializeObject <TwitterSearchResults>(json);
var upperBoundID = results.statuses[0].id;
DateTime upperDate = DateTime.ParseExact(results.statuses[0].created_at, "ddd MMM dd HH:mm:ss zzz yyyy", CultureInfo.InvariantCulture);
// calculate Tweet rate:
long seconds = (upperDate.Ticks - lowerDate.Ticks) / 10000000;
tweetRate = (upperBoundID - lowerBoundID) / seconds;
// start of day:
request = new HttpRequestMessage(HttpMethod.Get, String.Format(
"https://api.twitter.com/1.1/search/tweets.json?q=a&count=1&until={0:yyyy-MM-dd}&include_entities=false", dayStart));
request.Headers.Add("Authorization", "Bearer " + accessToken);
response = await httpClient.SendAsync(request);
json = await response.Content.ReadAsStringAsync();
results = JsonConvert.DeserializeObject <TwitterSearchResults>(json);
var dayStartID = results.statuses[0].id;
long offset = Convert.ToInt64(date.ToUniversalTime().TimeOfDay.TotalSeconds);
startID = dayStartID + (offset * tweetRate);
// start timer:
timer = new TwitterTimer(date);
}