public async Task <PaginatedItemsApiModel <MessageApiModel> > GetMessages(Guid userId, int pageIndex, int pageSize)
{
Expression <Func <Message, bool> > criteria = w => w.ReceiverId == userId || w.SenderId == userId;
var filterPaginatedSpecification = new MessageFilterPaginatedSpecification(pageSize * pageIndex, pageSize, criteria);
var itemsOnPage = await _repository.ListAsync(filterPaginatedSpecification);
var filterSpecification = new MessageFilterSpecification(criteria);
var totalItems = await _repository.CountAsync(filterSpecification);
var messages = itemsOnPage?.Select(w => new MessageApiModel()
{
Id = w.Id,
SenderId = w.SenderId,
ReceiverId = w.ReceiverId,
MessageText = w.MessageText,
MessageDate = w.MessageDate,
}) ?? new List <MessageApiModel>();
return(new PaginatedItemsApiModel <MessageApiModel>(pageIndex, pageSize, totalItems, messages));
}
private async Task <bool> MessageExistsAsync(Guid id)
{
return(await _repository.CountAsync(id) > 0);
}
