// First-level query.
// English -> Chinese, supports fuzzy search.
private async Task <List <Result> > FirstLevelQueryAsync(Query query, CancellationToken token)
{
string queryWord = query.Search;
HashSet <Result> results = new HashSet <Result>(WordEqualityComparer.instance);
// Pull fully match first.
Word fullMatch = await ecdict.QueryAsync(query.Search, token).ConfigureAwait(false);
if (fullMatch != null)
{
results.Add(MakeWordResult(fullMatch));
}
token.ThrowIfCancellationRequested();
ResultsUpdated?.Invoke(this, new ResultUpdatedEventArgs {
Results = results.ToList(), Query = query
});
// Then fuzzy search results. (since it's usually only a few)
List <SymSpell.SuggestItem> suggestions = wordCorrection.Correct(queryWord);
token.ThrowIfCancellationRequested();
await foreach (var word in ecdict.QueryRange(suggestions.Select(x => x.term), token).Select(w => MakeWordResult(w)).ConfigureAwait(false))
{
results.Add(word);
}
token.ThrowIfCancellationRequested();
ResultsUpdated?.Invoke(this, new ResultUpdatedEventArgs {
Results = results.ToList(), Query = query
});
await foreach (var word in ecdict.QueryBeginningWith(queryWord, token).Select(w => MakeWordResult(w)).ConfigureAwait(false))
{
results.Add(word);
}
return(results.ToList());
}
// First-level query.
// English -> Chinese, supports fuzzy search.
private List <Result> FirstLevelQuery(Query query)
{
string queryWord = query.Search;
IEnumerable <Word> results = Enumerable.Empty <Word>();
// Pull fully match first.
Word fullMatch = ecdict.Query(query.Search);
if (fullMatch != null)
{
results = results.Append(fullMatch);
}
// Then fuzzy search results. (since it's usually only a few)
List <SymSpell.SuggestItem> suggestions = wordCorrection.Correct(queryWord);
return(results.Concat(ecdict.QueryRange(suggestions))
.Concat(ecdict.QueryBeginningWith(queryWord))
.Distinct()
.Select(w => MakeWordResult(w))
.ToList());
}