/// <summary>
/// Регистрирует устройство на получение Push-уведомлений.
/// </summary>
public async Task RegisterDevice()
{
if (channel == null)
{
channel = await PushNotificationChannelManager.CreatePushNotificationChannelForApplicationAsync();
}
if (!String.IsNullOrEmpty(WNSChannelUri) && channel.Uri != WNSChannelUri)
{
await UnregisterDevice();
}
var parameters = new Dictionary <string, string>
{
["device_id"] = deviceInformationService.GetHardwareID(),
["token"] = channel.Uri,
["settings"] = "{\"msg\":\"on\",\"chat\":\"on\",\"friend\":\"on\",\"reply\":\"on\",\"mention\":\"on\"}"
};
var request = new Request <VKOperationIsSuccess>("account.registerDevice", parameters)
{
HttpMethod = HttpMethod.POST
};
var response = await vkService.ExecuteRequestAsync(request);
if (!response.IsSuccess)
{
throw new Exception("Не удалось зарегистрировать устройство");
}
WNSChannelUri = channel.Uri;
channel.PushNotificationReceived += Channel_PushNotificationReceived;
}
/// <summary>
/// Загрузить информацию о сообществе.
/// </summary>
private async Task LoadGroupInfo()
{
GroupName = "Загрузка";
var parameters = new Dictionary <string, string>
{
{ "group_id", groupID.ToString() },
{ "fields", "city,country,place,description,members_count,counters,start_date,finish_date,can_post,can_see_all_posts,activity,status,contacts,links,fixed_post,verified,site,ban_info" }
};
var request = new Request <List <VKGroupExtended> >("groups.getById", parameters);
var response = await vkService.ExecuteRequestAsync(request);
if (response.IsSuccess)
{
Group = response.Response[0];
GroupName = Group.Name;
JoinGroup.RaiseCanExecuteChanged();
ExitGroup.RaiseCanExecuteChanged();
}
}
/// <summary>
/// Загружает информацию о настройках.
/// </summary>
private async Task LoadSettings()
{
LoadingText = "Загрузка информации о настройках";
IsLoading = true;
var parameters = new Dictionary <string, string>
{
{ "group_id", Group.ID.ToString() }
};
var request = new Request <VKGroupSettings>("groups.getSettings", parameters);
var response = await vkService.ExecuteRequestAsync(request);
if (response.IsSuccess)
{
Settings = response.Response;
CurrentSubjectIndex = Settings.AvailableSubjects.FindIndex(s => s.ID == Settings.Subject);
}
else if (response.Error == VKErrors.AccessDenied)
{
var notification = new AppNotification
{
Type = AppNotificationType.Error,
Title = "Нет доступа к параметрам сообщества",
Content = "Не удалось получить текущие значения параметров",
ImageUrl = Group.Photo100
};
appNotificationsService.SendNotification(notification);
if (navigationService.CanGoBack())
{
navigationService.GoBack();
}
}
else
{
var notification = new AppNotification
{
Type = AppNotificationType.Error,
Title = "Не удалось получить текущие значения параметров",
Content = "Повторите попытку позднее",
ImageUrl = Group.Photo100
};
appNotificationsService.SendNotification(notification);
if (navigationService.CanGoBack())
{
navigationService.GoBack();
}
}
IsLoading = false;
}
/// <summary>
/// Возвращает данные для подключения к LongPoll серверу.
/// </summary>
private async Task <VKLongPollServerData> GetServerData()
{
appNotificationsService.SendNotification(new AppNotification
{
Type = AppNotificationType.Default,
Content = "Получение данных для подключения к серверу..."
});
byte currentRetry = 0;
while (currentRetry < MAX_RETRIES_NUMBER)
{
var request = new Request <VKLongPollServerData>("messages.getLongPollServer", token: cts.Token);
var response = await vkService.ExecuteRequestAsync(request);
if (response.IsSuccess)
{
return(response.Response);
}
else if (response.Error == VKErrors.ConnectionError)
{
if (++currentRetry < MAX_RETRIES_NUMBER)
{
int timeout = currentRetry * 5;
SendConnectionErrorPush(timeout);
await Task.Delay(timeout * 1000, cts.Token);
continue;
}
}
}
var notification = new AppNotification
{
Type = AppNotificationType.Error,
Title = "Не удалось получить данные для подключения",
Content = "Сервис мгновенных сообщений будет остановлен"
};
appNotificationsService.SendNotification(notification);
throw new Exception("Exit from GetServerData loop");
}
public async Task <IEnumerable <VKNewsfeedItem> > LoadMoreItems(uint page)
{
var parameters = new Dictionary <string, string>
{
{ "filters", "post" },
{ "count", "30" }
};
if (!String.IsNullOrEmpty(nextFrom))
{
parameters["start_from"] = nextFrom;
}
var request = new Request <VKNewsfeedGetResponse>("newsfeed.get", parameters);
var response = await vkService.ExecuteRequestAsync(request);
if (response.IsSuccess)
{
foreach (var item in response.Response.Items)
{
if (item.SourceID > 0)
{
item.Owner = response.Response.Profiles.FirstOrDefault(u => u.ID == item.SourceID);
}
else
{
item.Owner = response.Response.Groups.FirstOrDefault(g => g.ID == -item.SourceID);
}
}
nextFrom = response.Response.NextFrom;
return(response.Response.Items);
}
else
{
throw new Exception();
}
}