/// <summary>
/// Get Ask Question Results from Video Indexer Search Result
/// </summary>
public static AskQuestionResult[] GetAskQuestionResults(VideoIndexerSearchResult searchResult)
{
List <AskQuestionResult> results = new List <AskQuestionResult>();
foreach (VideoIndexerResult videoResult in searchResult.Results.Take(SettingsUtility.MaxResultsCount))
{
AskQuestionResult result = new AskQuestionResult()
{
Title = videoResult.Name,
ImageUrl = videoResult.ThumbnailUrl,
Source = "Video Indexer",
Url = videoResult.VideoUrl,
UrlDisplayName = "Open Video"
};
if (videoResult.SearchMatches?.Count() > 0 == true)
{
VideoIndexerSearchMatch match =
videoResult.SearchMatches.FirstOrDefault(s => s.Type.Contains("Transcript") == true) ?? videoResult.SearchMatches.First();
result.Url += "?t=" + TimeSpan.Parse(match.StartTime).TotalSeconds.ToString();
result.Answer = match.text;
}
results.Add(result);
}
return(results.ToArray());
}
public async Task <VideoIndexerSearchResult> SearchAsync(string query = "", string face = "")
{
if (string.IsNullOrEmpty(query) == true && string.IsNullOrEmpty(face) == true)
{
return(default(VideoIndexerSearchResult));
}
Dictionary <string, string> queryParams = new Dictionary <string, string>()
{
{ "query", WebUtility.UrlEncode(query) },
{ "face", WebUtility.UrlEncode(face) },
};
IEnumerable <string> queryString = queryParams
.Where(p => string.IsNullOrEmpty(p.Value) == false)
.Select(p => p.Key + "=" + p.Value);
string searchQuery = queryString.Count() == 1 ? queryString.FirstOrDefault() : string.Join("&", queryString);
// Get request uri
string searchUrl = this.BaseServiceUrl + "?" + searchQuery;
Uri requestUri = new Uri(searchUrl);
// Get response
VideoIndexerSearchResult result = await HttpClientUtility.GetAsync <VideoIndexerSearchResult>(requestUri, this.RequestHeaders);
return(result);
}
public static async Task <AskQuestionResponse> AnswerQuestion(AskQuestionRequest request, ICollector <SessionTableEntity> sessionTable)
{
// Get unique identifier
string id = Guid.NewGuid().ToString();
DateTime timestampUtc = DateTime.UtcNow;
// Get key phrases extraction
request.Topics = await ServicesUtility.GetTopics(request.Question, request.Topics);
string queryWithTopics = request.Topics?.Count() > 0 ? string.Join(" ", request.Topics).Trim() : request.Question;
// Create video indexer task
VideoIndexerSearchResult videoIndexerResult = await ServicesUtility.VideoIndexer.SearchAsync(query : queryWithTopics);
// Process results
AskQuestionResponse response = new AskQuestionResponse()
{
Id = id,
Results = new AskQuestionResult[0]
};
if (videoIndexerResult.Results?.Count() > 0)
{
response.Results = ServicesUtility.GetAskQuestionResults(videoIndexerResult);
}
else
{
// Create Bing Search tasks
BingWebSearchResult bingWebSearchResult =
await ServicesUtility.BingSearch.SearchWebAsync(query : request.Question, count : SettingsUtility.MaxResultsCount);
// Process Bing search results
if (bingWebSearchResult.WebPagesResult?.Values?.Count() > 0)
{
response.Results = ServicesUtility.GetAskQuestionResults(bingWebSearchResult);
}
}
// Write to session table
sessionTable.Add(new SessionTableEntity(id, timestampUtc, "LearnMore", request, response));
// Return response
return(response);
}
