public async Task <List <Message> > GetAttachments(AttachmentKind kind, int conversationId, string whoAccessedId,
int offset, int count)
{
var conversation = await conversationRepository.GetByIdAsync(conversationId);
if (conversation == null)
{
throw new KeyNotFoundException("Wrong conversation to get attachments from.");
}
//only member of conversation could request messages of non-public conversation.
if (!await usersConversationsRepository.Exists(whoAccessedId, conversationId) && !conversation.IsPublic)
{
throw new UnauthorizedAccessException("You are unauthorized to do such an action.");
}
var deleted = await deletedMessages.AsQuerableAsync(
new GetDeletedMessagesOfUserSpec(whoAccessedId));
var messages = await messagesRepository.ListAsync(
new GetSpecificAttachmentsSpec
(deleted,
conversationId,
kind,
offset,
count));
return((from msg in messages
select msg.ToMessage()).ToList());
}
