internal async Task <int> fetchPostArtifacts()
{
// Hanu Epoch time.
DateTime lastSyncTime = new DateTime(2011, 11, 4);
DateTime now = DateTime.Now;
string post_id_list = "";
var localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
if (localSettings.Values["LastSyncTime"] != null)
{
// This is not the first use.
lastSyncTime = DateTime.Parse(localSettings.Values["LastSyncTime"].ToString());
}
var iid = localSettings.Values["InstanceID"];
TimeSpan interval = now.Subtract(lastSyncTime);
if (interval.Minutes < 5)
{
return(0);
}
// It has been more than 5 min since we checked, so we can check again.
var syncData = new JObject();
if (localSettings.Values["SyncCategory"] != null)
{
syncData.Add("category", localSettings.Values["SyncCategory"].ToString());
}
if (localSettings.Values["SyncTags"] != null)
{
syncData.Add("tag", localSettings.Values["SyncTags"].ToString());
}
string sync_params = JsonConvert.SerializeObject(syncData);
using (HttpClient hc = new HttpClient())
{
String url = HanuDowsApplication.getInstance().BlogURL + "/wp-content/plugins/hanu-droid/PostArtifacts.php";
Uri address = new Uri(url);
var values = new List <KeyValuePair <string, string> >
{
new KeyValuePair <string, string>("modified_time", lastSyncTime.ToString("yyyy-MM-dd HH:mm:ss")),
new KeyValuePair <string, string>("iid", iid.ToString()),
new KeyValuePair <string, string>("sync_params", sync_params)
};
HttpFormUrlEncodedContent postContent = new HttpFormUrlEncodedContent(values);
HttpResponseMessage response = await hc.PostAsync(address, postContent).AsTask();
string response_text = await response.Content.ReadAsStringAsync();
XDocument xdoc = XDocument.Parse(response_text);
foreach (XElement post_artifact in xdoc.Root.Elements("PostArtifcatData"))
{
PostArtifact pf = new PostArtifact();
pf.PostID = (int)post_artifact.Attribute("Id");
pf.PubDate = DateTime.Parse(post_artifact.Attribute("PublishDate").Value);
pf.ModDate = DateTime.Parse(post_artifact.Attribute("ModifiedDate").Value);
// Sometimes comment date may not be available.
try
{
pf.CommentDate = DateTime.Parse(post_artifact.Attribute("CommentDate").Value);
}
catch
{
pf.CommentDate = new DateTime(2011, 11, 4);
}
_postArtifacts.Add(pf);
post_id_list += pf.PostID + ",";
}
}
// Get DB Artifacts now
post_id_list = post_id_list.TrimEnd(',');
Dictionary <int, PostArtifact> dbPostArtifacts = DBHelper.getInstance().getDBPostArtifacts(post_id_list);;
// Filter Artifacts now
PostArtifact dbArtifact;
foreach (PostArtifact pf in _postArtifacts.ToList())
{
dbPostArtifacts.TryGetValue(pf.PostID, out dbArtifact);
if (dbArtifact != null)
{
// See if DB artifact is older or not
if (pf.PubDate.CompareTo(dbArtifact.PubDate) >= 0 ||
pf.ModDate.CompareTo(dbArtifact.ModDate) >= 0 ||
pf.CommentDate.CompareTo(dbArtifact.CommentDate) >= 0)
{
// Keep this
}
else
{
// Remove this
_postArtifacts.Remove(pf);
}
}
}
return(_postArtifacts.Count);
}
internal async Task <bool> downloadPosts()
{
if (_postArtifacts.Count > 0)
{
String url = HanuDowsApplication.getInstance().BlogURL + "/wp-content/plugins/hanu-droid/FetchPosts.php";
int batchSize = 5;
int size = _postArtifacts.Count;
int loops = size / batchSize;
int x = 0;
var localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
bool allGood = true;
// Now time
DateTime now = DateTime.UtcNow;
while (x <= loops)
{
IEnumerable <PostArtifact> pfList = _postArtifacts.Skip(x * batchSize).Take(batchSize);
if (pfList.Count() <= 0)
{
x++;
continue;
}
// Get Post IDs
string post_ids = "";
string response_text = "";
foreach (PostArtifact pf in pfList)
{
post_ids += pf.PostID + ",";
}
post_ids = post_ids.TrimEnd(',');
try
{
// Download
using (HttpClient hc = new HttpClient())
{
Uri address = new Uri(url);
var values = new List <KeyValuePair <string, string> >
{
new KeyValuePair <string, string>("post_id", post_ids)
};
HttpFormUrlEncodedContent postContent = new HttpFormUrlEncodedContent(values);
HttpResponseMessage response = await hc.PostAsync(address, postContent).AsTask();
var buffer = await response.Content.ReadAsBufferAsync();
var byteArray = buffer.ToArray();
response_text = Encoding.UTF8.GetString(byteArray, 0, byteArray.Length);
XDocument xdoc = XDocument.Parse(response_text);
DownloadedPostList = HanuDowsApplication.getInstance().parseXMLToPostList(xdoc);
}
bool success = await savePostsToDB();
if (!success)
{
allGood = false;
}
}
catch (Exception ex)
{
WebErrorStatus error = WebError.GetStatus(ex.GetBaseException().HResult);
System.Diagnostics.Debug.WriteLine(ex.Message);
System.Diagnostics.Debug.WriteLine(error.ToString());
}
x++;
}
if (allGood)
{
// Set Last sync time
localSettings.Values["LastSyncTime"] = now.ToString();
}
else
{
// Set last sync time to Hanu Epoch
localSettings.Values["LastSyncTime"] = (new DateTime(2011, 11, 4)).ToString();
}
}
return(true);
}
