private void buildIndexTables(IEnumerable<ITag> originalRootTags, TagUserAuthorizations auths)
{
//Search for visible tags and authorized photos
Dictionary<string, IPhoto> authorizedPhotos = new Dictionary<string, IPhoto>();
List<ITag> authorizedTags = getAuthorizedTags(originalRootTags, auths).ToList();
HashSet<ITag> visibleTags = new HashSet<ITag>();
foreach (var tag in authorizedTags)
{
foreach (var photo in tag.Photos)
{
//even not directly authorized tags can be traversed or can reference authorized photo.
//We register them, but not theirs photos.
photo.Tags
.ForEach(t => getTagsHierarchy(t)
.ForEach(t2 => visibleTags.Add(t2)));
//Register photos from a directly authorized tag.
authorizedPhotos[photo.Id] = photo;
}
}
//root tags
this.rootTags = (from rootTag in originalRootTags.Intersect(visibleTags)
select new InternalTag(rootTag, authorizedTags, visibleTags, null)).ToList();
//tag index
tags = new Dictionary<string, InternalTag>();
foreach (var rootTag in rootTags)
{
tags[rootTag.Id] = rootTag;
foreach(var subTag in rootTag.AllTags)
tags[subTag.Id] = subTag;
}
//Order photo in a timeline list.
var tempTimeline = new List<IPhoto>(authorizedPhotos.Values);
tempTimeline.Sort((p1, p2) => p2.Date.CompareTo(p1.Date));
timelinePhotos = new LinkedList<IPhoto>(tempTimeline);
//day index for timeline.
photosByDays = new Dictionary<DateTime, LinkedListNode<IPhoto>>();
for (var item = timelinePhotos.First; item != null; item = item.Next)
if (item == timelinePhotos.First || item.Previous.Value.Date.Date != item.Value.Date.Date)
photosByDays[item.Value.Date.Date] = item;
//photo ids index for timeline.
photosByIds = new Dictionary<string, LinkedListNode<IPhoto>>();
for (var item = timelinePhotos.First; item != null; item = item.Next)
photosByIds[item.Value.Id] = item;
}
private IEnumerable<ITag> getAuthorizedTags(IEnumerable<ITag> originalRootTags, TagUserAuthorizations auths)
{
return from tagId in auths.GetTags(user)
select getTagById(originalRootTags, tagId);
}
public UserPhotoLibrary(string user, IEnumerable<ITag> originalRootTags, TagUserAuthorizations auths)
{
this.user = user;
buildIndexTables(originalRootTags, auths);
}
private void initAuthorizations()
{
var allTags = getAllTags(rootTags).ToList();
Func<string, bool> tagExists = (id) => allTags.Any(t => t.Id == id);
var oldData = ConfigurationClient.Get<TagUserAuthorizations>(
confNamespace, confTagUserAuthorizationsKey, null);
tagUserAuthorizations = new TagUserAuthorizations(oldData, tagExists);
//save it again : can be updated regarding current provider and available tags.
saveAuthorizations();
}