public async Task AddLinks <T>(
string sourceId,
Entities.EntityType sourceType,
Entities.LinkType linkType,
string partitionId,
IEnumerable <T> links) where T : Entities.Entry
{
Guard.AgainstNullOrWhitespace(nameof(sourceId), sourceId);
Guard.AgainstNullOrWhitespace(nameof(partitionId), partitionId);
await this.EnsureInitialized();
string collectionLink = UriFactory.CreateDocumentCollectionUri(this.databaseName, this.collectionName).ToString();
Entities.LinksCollection <T> result = this
.client
.CreateDocumentQuery <Entities.DefaultLinksCollection <T> >(
collectionLink,
new FeedOptions()
{
PartitionKey = new PartitionKey(partitionId)
})
.Where(item => item.SourceId == sourceId && item.LinkType == linkType && item.SourceType == sourceType && item.IsFull == false)
.ToList()
.FirstOrDefault();
if (result == null)
{
result = Entities.LinksCollection <T> .Create <T>(sourceId, partitionId, sourceType, linkType, links);
await this.Create(result);
return;
}
foreach (T link in links)
{
result.TargetEntities.Add(link);
}
await this.Update(result);
// TODO: Check if the current page collection has exceeded collection size and create a new collection accordingly.
}
public async Task RemoveLink <T>(
string sourceId,
Entities.EntityType sourceType,
Entities.LinkType linkType,
string partitionId,
T link) where T : Entities.Entry
{
Guard.AgainstNullOrWhitespace(nameof(sourceId), sourceId);
Guard.AgainstNullOrWhitespace(nameof(partitionId), partitionId);
await this.EnsureInitialized();
string collectionLink = UriFactory.CreateDocumentCollectionUri(this.databaseName, this.collectionName).ToString();
Entities.LinksCollection <T> result = this
.client
.CreateDocumentQuery <Entities.DefaultLinksCollection <T> >(
collectionLink,
new FeedOptions()
{
PartitionKey = new PartitionKey(partitionId)
})
.Where(item => item.SourceId == sourceId && item.LinkType == linkType && item.SourceType == sourceType && item.TargetEntities.Contains(link))
.ToList()
.FirstOrDefault();
if (result == null)
{
// No such link.
return;
}
T linkToRemove = result.TargetEntities.First(item => item.id == link.id);
result.TargetEntities.Remove(linkToRemove);
await this.Update(result);
}