public async Task <List <SearchResult> > GetWebResults(MainViewModel model)
{
List <List <SearchResult> > searchResults = new List <List <SearchResult> >();
List <SearchEngine> engines = model.Context.Engines.ToList();
Task <List <SearchResult> >[] tasks = new Task <List <SearchResult> > [engines.Count];
int taskNum = 0;
try
{
foreach (SearchEngine engine in engines)
{
switch (engine.EngineId)
{
case (int)EnginesEnum.Google:
WebSearch GSearch = new Google(model, engine);
tasks[taskNum] = Task.Run(() => GSearch.GetResultsAsync());
break;
case (int)EnginesEnum.Yandex:
WebSearch YSearch = new Yandex(model, engine);
tasks[taskNum] = Task.Run(() => YSearch.GetResultsAsync());
break;
case (int)EnginesEnum.Bing:
WebSearch BSearch = new Bing(model, engine);
tasks[taskNum] = Task.Run(() => BSearch.GetResultsAsync());
break;
default:
return(new List <SearchResult>());
}
}
}
catch (Exception ex)
{
await model.Context.Logs.AddAsync(new Log
{
EngineId = 0,
DateStamp = DateTime.Now.ToString(),
Message = $"Data search error. Message: {ex.Message}"
});
}
var firstResult = await Task.WhenAny(tasks.Where(t => t != null)).Result;
await Task.WhenAll(tasks.Where(t => t != null).ToArray());
return(firstResult);
}
