public IAsyncAction RemoveAsync(VocabIdentifier vocabID)
{
if (vocabID == null)
{
throw new ArgumentNullException("vocabID");
}
return m_root.Store.DeleteAsync(vocabID.GetKey()).AsAsyncAction();
}
public IAsyncOperation<VocabCodeSet> GetAsync(VocabIdentifier vocabID)
{
if (vocabID == null)
{
throw new ArgumentNullException("vocabID");
}
return GetVocabAsync(vocabID).AsAsyncOperation();
}
public IAsyncAction PutAsync(VocabIdentifier vocabID, VocabCodeSet vocab)
{
if (vocabID == null)
{
throw new ArgumentNullException("vocabID");
}
if (vocab == null)
{
throw new ArgumentNullException("vocab");
}
string key = vocabID.GetKey();
return m_root.Store.PutAsync(key, vocab).AsAsyncAction();
}
public IAsyncOperation<VocabQueryResult> SearchAsync(VocabIdentifier vocab, string searchText)
{
vocab.ValidateRequired("vocab");
return AsyncInfo.Run(
async cancelToken =>
{
//VocabQuery query = new VocabQuery(vocab, searchText);
var query = new object[]
{
vocab,
new VocabSearch(searchText)
};
VocabQueryResults results =
await m_app.Client.ServiceMethods.SearchVocabulary<VocabQueryResults>(query, cancelToken);
return results.HasMatches ? results.Matches : null;
});
}
private async Task EnsureVocabImplAsync(VocabIdentifier vocabID, TimeSpan maxAge)
{
bool isStale = await IsStale(vocabID, maxAge);
if (isStale)
{
await DownloadVocabs(new[] {vocabID});
}
}
private async Task<bool> IsStale(VocabIdentifier vocabID, TimeSpan maxAge)
{
DateTimeOffset dt = await m_root.Store.GetUpdateDateAsync(vocabID.GetKey());
TimeSpan offset = DateTimeOffset.Now.Subtract(dt);
return (offset >= maxAge);
}
private async Task<VocabCodeSet> GetVocabAsync(VocabIdentifier vocabID)
{
string key = vocabID.GetKey();
return (VocabCodeSet) await m_root.Store.GetAsync(key, typeof (VocabCodeSet));
}
/// <summary>
/// If vocabs are not available, will kick off a fetch in the background
/// </summary>
public IAsyncAction EnsureVocabAsync(VocabIdentifier vocabID, int maxAgeSeconds)
{
return Task.Run(() => EnsureVocabImplAsync(vocabID, TimeSpan.FromSeconds(maxAgeSeconds))).AsAsyncAction();
}