private List<Result> Query(Query query, ITokenSource cancelToken)
{
if (query.KeywordComplete && query.HasArguments) {
// check the cache for a matching result
var cacheKey = query.Arguments;
var cachedSuggestions = MemoryCache.Default.Get(cacheKey) as List<string>;
// if cached result is found, return it.
if (cachedSuggestions != null) {
// convert the list of suggestion strings to a List<Result>
if (cachedSuggestions.Any()) {
var results = cachedSuggestions.Select(suggestion => new Result
{
Title = suggestion,
Icon = _icon,
SubTitle = "Search google for " + suggestion,
Launch = query1 =>
{
Process.Start($"http://google.co.uk/search?q={suggestion}");
AppCommands.HideWindow();
}
}).ToList();
return results;
}
// no suggestions were received from the server
return new List<Result>
{
new Result
{
Title = "No search suggestions found.",
Icon = _icon
}
};
}
// Cache miss, begin the background query to fill the cache
// create a local cancel token for passing to httpclient..
var cancellable = new CancellationToken();
cancellable.Register(() =>
{
cancelToken.Cancel();
cancelToken.Dispose();
});
var x = GetSuggestionsAsync(query.Arguments, cancellable);
return new List<Result>
{
new Result
{
Title = "Retrieving search suggestions...",
Icon = _icon
}
};
}
// otherwise the query has not been provided yet, running the action will autocomplete the query
return new List<Result>
{
new Result
{
Title = "Search Google",
SubTitle = "Search Google with Suggestions",
Icon = _icon,
Launch = query1 => AppCommands.RewriteQuery(Keyword + ' ')
}
};
}
