private async Task UpdateRating(UpdatingOperation updatingInfo,
VoteChangeViewModel voteChange)
{
var votesAmountToAdd = GetVotesAmountToAdd(voteChange);
await Collection.UpdateOneAsync(updatingInfo.Filter,
UpdateBuilder.Inc(updatingInfo.ModelHierarchy + "." + nameof(IVotable.Rating).ToLower(),
votesAmountToAdd),
updatingInfo.Options);
}
private async Task UpdateUserInVotersLists(UpdatingOperation updatingInfo,
VoteChangeViewModel voteChange)
{
await Collection.UpdateOneAsync(updatingInfo.Filter,
UpdateBuilder.Pull(updatingInfo.ModelHierarchy + "." + nameof(IVotable.Upvoters).ToLower(), UserId),
updatingInfo.Options);
await Collection.UpdateOneAsync(updatingInfo.Filter,
UpdateBuilder.Pull(updatingInfo.ModelHierarchy + "." + nameof(IVotable.Downvoters).ToLower(), UserId),
updatingInfo.Options);
if (voteChange.NewDirection != voteChange.PreviousDirection)
{
await Collection.UpdateOneAsync(updatingInfo.Filter,
UpdateBuilder.AddToSet(updatingInfo.ModelHierarchy + "." + GetVotersListName(voteChange.NewDirection).ToLower(), UserId),
updatingInfo.Options);
}
}
private int GetVotesAmountToAdd(VoteChangeViewModel voteChange)
{
return(voteChange.NewDirection == voteChange.PreviousDirection
? (int)voteChange.NewDirection * -1
: voteChange.NewDirection - voteChange.PreviousDirection);
}
