public virtual Tag[] SyncVotes(User user, Tag[] tags, ITagUsageFactory <T> tagUsageFactory,
bool onlyAdd = false)
{
var actualTags = tags.Distinct().ToArray();
var tagUsagesDiff = CollectionHelper.Diff(Usages, actualTags, (t1, t2) => t1.Tag.Equals(t2));
var modifiedTags = new List <Tag>(tagUsagesDiff.Added.Length + tagUsagesDiff.Removed.Length + tagUsagesDiff.Unchanged.Length);
foreach (var newUsageTag in tagUsagesDiff.Added)
{
var newUsage = tagUsageFactory.CreateTagUsage(newUsageTag);
Usages.Add(newUsage);
newUsage.CreateVote(user);
newUsageTag.UsageCount++;
modifiedTags.Add(newUsageTag);
}
if (!onlyAdd)
{
foreach (var removedTag in tagUsagesDiff.Removed)
{
removedTag.RemoveVote(user);
if (!removedTag.HasVotes)
{
removedTag.Tag.UsageCount--;
Usages.Remove(removedTag);
}
modifiedTags.Add(removedTag.Tag);
}
}
foreach (var updated in tagUsagesDiff.Unchanged)
{
updated.CreateVote(user);
modifiedTags.Add(updated.Tag);
}
return(modifiedTags.ToArray());
}
public virtual void SyncVotes(User user, string[] tagNames, Dictionary <string, Tag> allTags, ITagFactory tagFactory, ITagUsageFactory <T> tagUsageFactory,
bool onlyAdd = false)
{
var newTags = tagNames.Where(t => !allTags.ContainsKey(t));
foreach (var tag in newTags)
{
var newTag = tagFactory.CreateTag(tag);
allTags.Add(newTag.Name, newTag);
}
tagNames = tagNames.Select(t => allTags[t].ActualTag.Name).Distinct().ToArray();
var tagUsagesDiff = CollectionHelper.Diff(Usages, tagNames, (t1, t2) => t1.Tag.Name.Equals(t2, StringComparison.InvariantCultureIgnoreCase));
foreach (var newUsageName in tagUsagesDiff.Added)
{
var tag = allTags[newUsageName];
var newUsage = tagUsageFactory.CreateTagUsage(tag);
Usages.Add(newUsage);
newUsage.CreateVote(user);
}
if (!onlyAdd)
{
foreach (var removedTag in tagUsagesDiff.Removed)
{
removedTag.RemoveVote(user);
if (removedTag.Count <= 0)
{
Usages.Remove(removedTag);
}
}
}
foreach (var updated in tagUsagesDiff.Unchanged)
{
updated.CreateVote(user);
}
}