/// <summary>
/// Gets whether subscriptions exist in the Episerver Social subscription repository that match a filter.
/// </summary>
/// <param name="filter"></param>
/// <returns>Whether subscriptions exist.</returns>
/// <exception cref="SocialRepositoryException">Thrown if there are any issues sending the request to the
/// Episerver Social subscription repository.</exception>
public bool Exist(PageSubscriptionFilter filter)
{
var subscriptionFilter = AdaptSubscriptionFilter(filter);
try
{
return(this.subscriptionService.Get(
new Criteria <SubscriptionFilter>
{
PageInfo = new PageInfo
{
PageSize = 0
},
Filter = subscriptionFilter
}
).HasMore);
}
catch (SocialAuthenticationException ex)
{
throw new SocialRepositoryException("The application failed to authenticate with Episerver Social.", ex);
}
catch (MaximumDataSizeExceededException ex)
{
throw new SocialRepositoryException("The application request was deemed too large for Episerver Social.", ex);
}
catch (SocialCommunicationException ex)
{
throw new SocialRepositoryException("The application failed to communicate with Episerver Social.", ex);
}
catch (SocialException ex)
{
throw new SocialRepositoryException("Episerver Social failed to process the application request.", ex);
}
}
/// <summary>
/// Adapt a PageSubscriptionFilter to a SubscriptionFilter
/// </summary>
/// <param name="filter">The PageSubscriptionFilter </param>
/// <returns>The SubscriptionFilter</returns>
private SubscriptionFilter AdaptSubscriptionFilter(PageSubscriptionFilter filter)
{
return(new SubscriptionFilter
{
Subscriber = !string.IsNullOrWhiteSpace(filter.Subscriber) ? Reference.Create(filter.Subscriber) : Reference.Empty,
Target = !string.IsNullOrWhiteSpace(filter.Target) ? Reference.Create(filter.Target) : Reference.Empty,
});
}
/// <summary>
/// Set the block view model property indicating whether the current user is subscribed to the current page.
/// </summary>
/// <param name="blockViewModel">The subscription block view model.</param>
private void SetUserSubscribedToPage(SubscriptionBlockViewModel blockViewModel)
{
try
{
var filter = new PageSubscriptionFilter
{
Subscriber = _userRepository.GetUserId(User),
Target = _pageRepository.GetPageId(blockViewModel.CurrentLink)
};
if (_subscriptionRepository.Exist(filter))
{
blockViewModel.UserSubscribedToPage = true;
}
else
{
blockViewModel.UserSubscribedToPage = false;
}
}
catch (SocialRepositoryException ex)
{
blockViewModel.Messages.Add(new MessageViewModel(ex.Message, ErrorMessage));
}
}
