/// <summary>
/// Sends a <see cref="DF2QueryInput"/> object as a HTTP request to the remote
/// chatbot.
/// </summary>
/// <param name="queryInput">The input request.</param>
/// <param name="session">The session ID, i.e., the ID of the user who talks to the chatbot.</param>
private IEnumerator DetectIntent(DF2QueryInput queryInput, string session)
{
// Gets the JWT access token.
string accessToken = string.Empty;
while (!JwtCache.TryGetToken(accessSettings.ServiceAccount, out accessToken))
{
yield return(JwtCache.GetToken(accessSettings.CredentialsFileName,
accessSettings.ServiceAccount));
}
// Prepares the HTTP request.
var settings = new JsonSerializerSettings();
settings.NullValueHandling = NullValueHandling.Ignore;
settings.ContractResolver = new CamelCasePropertyNamesContractResolver();
DF2Request request = new DF2Request(session, queryInput);
// Adds the input contexts and the entities.
request.QueryParams = new DF2QueryParams();
request.QueryParams.Contexts = inputContexts.ToArray();
inputContexts.Clear();
request.QueryParams.SessionEntityTypes = inputEntities.ToArray();
inputEntities.Clear();
string jsonInput = JsonConvert.SerializeObject(request, settings);
byte[] body = Encoding.UTF8.GetBytes(jsonInput);
string url = string.Format(PARAMETRIC_DETECT_INTENT_URL, accessSettings.ProjectId, session);
UnityWebRequest df2Request = new UnityWebRequest(url, "POST");
df2Request.SetRequestHeader("Authorization", "Bearer " + accessToken);
df2Request.SetRequestHeader("Content-Type", "application/json");
df2Request.uploadHandler = new UploadHandlerRaw(body);
df2Request.downloadHandler = new DownloadHandlerBuffer();
yield return(df2Request.SendWebRequest());
// Processes response.
if (df2Request.isNetworkError || df2Request.isHttpError)
{
DetectIntentError?.Invoke(JsonConvert.DeserializeObject <DF2ErrorResponse>(df2Request.downloadHandler.text));
}
else
{
string response = Encoding.UTF8.GetString(df2Request.downloadHandler.data);
DF2Response resp = JsonConvert.DeserializeObject <DF2Response>(response);
ChatbotResponded?.Invoke(resp);
for (int i = 0; i < resp.queryResult.outputContexts.Length; i++)
{
DF2Context context = resp.queryResult.outputContexts[i];
string[] cName = context.Name.ToLower().Split('/');
if (reactionContexts.ContainsKey(cName[cName.Length - 1]))
{
reactionContexts[cName[cName.Length - 1]](context);
}
}
}
}
/// <summary>
/// Adds an input context to the next request.
/// </summary>
/// <param name="inputContext">The input context to add.</param>
/// <param name="session">The current session ID.</param>
public void AddInputContext(DF2Context inputContext, string session)
{
if (!inputContext.Name.StartsWith("projects"))
{
inputContext.Name = string.Format(DF2Context.PARAMETRIC_CONTEXT_ID,
accessSettings.ProjectId, session, inputContext.Name);
}
inputContexts.Add(inputContext);
}
