public void DoSyncAsync(bool force = false)
{
Task.Factory.StartNew(() =>
{
using (ReadWriteLock.UpgradeableReadLock())
{
var settings = new JsonSerializerSettings()
{
MissingMemberHandling = MissingMemberHandling.Ignore
};
Dictionary <long, Work> items;
Dictionary <long, Work> current;
long time;
long old_sync;
Task <HttpResponseMessage> responseTask;
HttpResponseMessage response;
Task <string> contentTask;
string content;
using (ReadWriteLock.WriteLock())
{
if (serversync == SyncState.Disabled)
{
EndSyncEvent?.Invoke(this, new EventArgs <bool>(false));
//console.warn("dosync: FAILED. No credentials");
return;
}
// if we have waiting readers do it now
if (ReadWriteLock.WaitingReadCount > 0)
{
force = true;
}
// Enforce 5 minutes gap between server sync. Don't want to hammer the server while scrolling through a fic
var now = DateTime.UtcNow.Ticks / 10000;
if (!force && now < no_sync_until)
{
//console.log("dosync: have to wait %i for timeout", no_sync_until - now);
DelayedSyncAsync((int)(no_sync_until - now));
return;
}
serversync = SyncState.Syncing; // set to syncing!
if (DelayedSyncCTS != null)
{
DelayedSyncCTS.Cancel();
DelayedSyncCTS = null;
}
no_sync_until = now + 5 * 60 * 1000;
BeginSyncEvent?.Invoke(this, EventArgs.Empty);
//console.log("dosync: sending GET request");
responseTask = HttpClient.GetAsync(new Uri(url_base, "Values?after=" + last_sync));
responseTask.TryWait();
response = responseTask.IsFaulted ? null : responseTask.Result;
if (response == null || !response.IsSuccessStatusCode)
{
using (ReadWriteLock.WriteLock())
{
//console.error("dosync: FAILED %s", response.ReasonPhrase);
if (response != null && response.StatusCode == HttpStatusCode.Forbidden)
{
serversync = SyncState.Disabled;
}
else
{
serversync = SyncState.Ready;
}
EndSyncEvent?.Invoke(this, new EventArgs <bool>(false));
return;
}
}
contentTask = response.Content.ReadAsStringAsync();
contentTask.Wait();
content = contentTask.Result;
old_sync = last_sync;
try
{
items = JsonConvert.DeserializeObject <Dictionary <long, Work> >(content, settings);
}
catch (Exception e)
{
App.Log(e);
serversync = SyncState.Disabled;
EndSyncEvent?.Invoke(this, new EventArgs <bool>(false));
return;
}
Dictionary <long, Work> newitems = new Dictionary <long, Work>();
foreach (var item in items)
{
item.Value.workid = item.Key;
// Highest time value of incoming item is our new sync time
if (item.Value.Timestamp > last_sync)
{
last_sync = item.Value.Timestamp;
}
Work old = null;
if (!storage.ContainsKey(item.Key) || (old = storage[item.Key]).LessThanOrEqual(item.Value))
{
// Remove from unsynced list (if it exists)
if (unsynced.ContainsKey(item.Key))
{
unsynced.Remove(item.Key);
}
// Grab the new details
newitems[item.Key] = storage[item.Key] = item.Value;
if (old == null || item.Value.location == null || item.Value.location == 0 || (old != null && item.Value.number > old.number))
{
WorkEvents.TryGetEvent(item.Key)?.OnChapterNumChanged(this, item.Value);
}
else
{
WorkEvents.TryGetEvent(item.Key)?.OnLocationChanged(this, item.Value);
}
}
// This kinda shouldn't happen, but apparently it did... we can deal with it though
else
{
// Update the timestamp to newer than newest
if (storage[item.Key].Timestamp <= item.Value.Timestamp)
{
storage[item.Key].Timestamp = item.Value.Timestamp + 1;
}
else
{
item.Value.Timestamp += 1;
}
// set as unsynced
unsynced[item.Key] = storage[item.Key];
}
}
App.Database.SaveItems(newitems.Values.ToReadOnly());
current = unsynced;
unsynced = new Dictionary <long, Work>();
time = last_sync;
if (current.Count == 0)
{
App.Database.SaveVariable("last_sync", last_sync);
serversync = SyncState.Ready;
EndSyncEvent?.Invoke(this, new EventArgs <bool>(true));
return;
}
}
foreach (var item in current.Values)
{
if (item.Timestamp > time)
{
time = item.Timestamp;
}
}
var json = JsonConvert.SerializeObject(current);
var postBody = new StringContent(json, System.Text.Encoding.UTF8, "application/json");
responseTask = HttpClient.PostAsync(new Uri(url_base, "Values"), postBody);
responseTask.TryWait();
response = responseTask.IsFaulted ? null : responseTask.Result;
if (response == null || !response.IsSuccessStatusCode)
{
using (ReadWriteLock.WriteLock())
{
//console.error("dosync: FAILED %s", response.ReasonPhrase);
if (response != null && response.StatusCode == HttpStatusCode.Forbidden)
{
last_sync = 0;
serversync = SyncState.Disabled;
}
else
{
last_sync = old_sync;
serversync = SyncState.Ready;
unsynced = current;
}
App.Database.SaveVariable("last_sync", last_sync);
EndSyncEvent?.Invoke(this, new EventArgs <bool>(false));
return;
}
}
contentTask = response.Content.ReadAsStringAsync();
contentTask.Wait();
content = contentTask.Result;
try
{
items = JsonConvert.DeserializeObject <Dictionary <long, Work> >(content, settings);
}
catch (Exception e)
{
App.Log(e);
using (ReadWriteLock.WriteLock())
{
serversync = SyncState.Disabled;
App.Database.SaveVariable("last_sync", 0L);
last_sync = 0;
EndSyncEvent?.Invoke(this, new EventArgs <bool>(false));
return;
}
}
//console.log("dosync: SUCCESS. %i conflicted items", Object.keys(items).length);
using (ReadWriteLock.WriteLock())
{
if (items.Count > 0)
{
App.Database.SaveVariable("last_sync", 0L);
last_sync = 0;
DoSyncAsync(true);
return;
}
if (time > last_sync)
{
last_sync = time;
App.Database.SaveVariable("last_sync", time);
}
if (unsynced.Count > 0)
{
DoSyncAsync(true);
}
else
{
serversync = SyncState.Ready;
EndSyncEvent?.Invoke(this, new EventArgs <bool>(true));
}
}
}
}, TaskCreationOptions.PreferFairness | TaskCreationOptions.LongRunning);
}