public async Task <ActionResult> AddTagUse(string name)
{
SystemContract.RequireNotNullOrWhiteSpace(name, "name");
var user = GetUser();
var result = await _tagHandler.EnsureTagUseAsync(user.Id, name);
var tagUses = await _tagHandler.GetAllTagUsesAsync(user.Id);
var ret = Mapper.Map <ICollection <TagUseViewModel> >(tagUses);
return(JsonNet(ret));
}
private async Task <EntityIdentity> SetTagUsesAsync(RefList refList, IEnumerable <string> tagNames, bool isPublishingStatusChanged)
{
tagNames = tagNames ?? new string[0];
if (tagNames.Any(n => string.IsNullOrWhiteSpace(n)))
{
throw new ArgumentException();
}
refList.TagUses = refList.TagUses ?? new List <TagUse>();
var storedTagNames = refList.TagUses.Select(u => u.Name).ToArray();
/// どちらにも含まれているタグに対してやることはない
///var asIsTagUses = storedTagNames.Intersect(tagNames);
/// 削除分
var removedTagUseNames = storedTagNames.Except(tagNames);
var removedTagUses = removedTagUseNames.Select(n => refList.TagUses.Single(u => u.Name == n)).ToArray();
foreach (var removed in removedTagUses)
{
refList.TagUses.Remove(removed);
}
/// 追加分
var addedTagUseNames = tagNames.Except(storedTagNames);
var addedTagUses = new List <TagUse>();
foreach (var name in addedTagUseNames)
{
var tagUse = await _tagHandler.EnsureTagUseAsync(refList.AuthorId, name);
addedTagUses.Add(tagUse);
}
/// 下の書き方ではEnsureTagUseAsync()が同時に複数回呼ばれるため?例外が発生する。
/// ちゃんとawaitで待って同時には一回しか呼ばれないようにする。
///var addedTagUses = (await addedTagUseNames.Select(
/// async n => await _tagHandler.EnsureTagUseAsync(refList.AuthorId, n)
///).WhenAll()).ToArray();
foreach (var added in addedTagUses)
{
refList.TagUses.Add(added);
}
/// リストの更新
if (removedTagUseNames.Any() || addedTagUseNames.Any())
{
_refsContext.MarkAsModified(refList);
SendRefListUpdated(refList.Id);
}
await _refsContext.SaveChangesAsync();
/// update statistics
{
if (isPublishingStatusChanged)
{
var asIsTagUseNames = storedTagNames.Intersect(tagNames);
var asIsTagUses = asIsTagUseNames.Select(n => refList.TagUses.Single(u => u.Name == n)).ToArray();
foreach (var asIs in asIsTagUses)
{
asIs.Statistics.RefListCount = asIs.RefLists.Count();
asIs.Statistics.PublishedRefListCount =
asIs.RefLists.Where(l => l.PublishingStatus == PublishingStatusKind.Publish).Count();
}
}
foreach (var removed in removedTagUses)
{
removed.Statistics.RefListCount = removed.RefLists.Count();
removed.Statistics.PublishedRefListCount =
removed.RefLists.Where(l => l.PublishingStatus == PublishingStatusKind.Publish).Count();
}
foreach (var added in addedTagUses)
{
added.Statistics.RefListCount = added.RefLists.Count();
added.Statistics.PublishedRefListCount =
added.RefLists.Where(l => l.PublishingStatus == PublishingStatusKind.Publish).Count();
}
}
await _refsContext.SaveChangesAsync();
return(new EntityIdentity()
{
Id = refList.Id,
RowVersion = refList.RowVersion,
});
}