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 EnsureVocabImplAsync(VocabIdentifier vocabID, TimeSpan maxAge)
{
bool isStale = await IsStale(vocabID, maxAge);
if (isStale)
{
await DownloadVocabs(new[] { vocabID });
}
}
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());
}
private async Task EnsureVocabsImplAsync(IList <VocabIdentifier> vocabIDs, TimeSpan maxAge)
{
var staleVocabs = new LazyList <VocabIdentifier>();
for (int i = 0; i < vocabIDs.Count; ++i)
{
VocabIdentifier vocabID = vocabIDs[i];
if (await IsStale(vocabID, maxAge))
{
staleVocabs.Add(vocabID);
}
}
if (staleVocabs.Count > 0)
{
await DownloadVocabs(staleVocabs.Value);
}
}
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 <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());
}
