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PlantyCompareHttpTrigger.cs
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PlantyCompareHttpTrigger.cs
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using System;
using System.IO;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using Google.Cloud.Dialogflow.V2;
using Google.Protobuf.WellKnownTypes;
using planty_compare_fulfillment.Models;
using System.Linq;
using Google.Protobuf;
using System.Net.Http;
namespace planty_compare_fulfillment.dotnet
{
public static class PlantyCompareHttpTrigger
{
private const string HELP_MESSAGE =
"You can ask, how much would you need to make in a given city to maintain a comparable lifestyle,"
+ " or, you can say exit... What can I help you with?";
private const string HELP_REPROMPT = "What can I help you with?";
private const string STOP_MESSAGE = "Goodbye!";
private static readonly string INTENT_MAIN = "actions.intent.MAIN";
private static readonly string INTENT_NOINPUT = "actions.intent.NO_INPUT";
internal enum PlantyRequestType
{
EquivalentIncomeEstimate,
Help,
Stop,
HealthCheck
}
private static readonly JsonParser jsonParser = new JsonParser(JsonParser.Settings.Default.WithIgnoreUnknownFields(true));
private static readonly HttpClient client = new HttpClient();
[FunctionName("PlantyCompareHttpTrigger")]
public static async Task<IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,
ILogger log)
{
log.LogInformation("C# HTTP trigger function processed a request.");
string name = req.Query["name"];
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
// dynamic data = JsonConvert.DeserializeObject(requestBody);
// name = name ?? data?.name;
// return name != null
// ? (ActionResult)new OkObjectResult($"Hello, {name}")
// : new BadRequestObjectResult("Please pass a name on the query string or in the request body");
string responseJson = null;
string userId = null;
WebhookRequest request = null;
PlantyRequestType requestType;
if (IsHealthCheck(requestBody, log)) {
requestType = PlantyRequestType.HealthCheck;
} else {
try
{
request = jsonParser.Parse<WebhookRequest>(requestBody);
}
catch (InvalidProtocolBufferException ex)
{
log.LogError(ex, "Web hook request could not be parsed.");
return new BadRequestObjectResult("Error deserializing Dialog flow request from message body");
}
userId = GetUserId(request);
string intent = request.QueryResult.Intent.DisplayName;
requestType = GetPlantyRequestType(intent);
}
WebhookResponse webHookResp = null;
switch (requestType)
{
case PlantyRequestType.EquivalentIncomeEstimate:
// TODO: Parameterize targetCurrency too
var targetCurrency = request.QueryResult.Parameters
// .Fields["targetCurrency"].StringValue;
.Fields["baseIncome"].StructValue.Fields["currency"].StringValue;
decimal incomeAmount = await GetEquivalentIncome(request);
string estimateText =
$"You'd need to earn {incomeAmount} {targetCurrency}s, to maintain a comparable lifestyle.";
webHookResp = GetDialogFlowResponse(userId, estimateText);
break;
case PlantyRequestType.Help:
webHookResp = GetDialogFlowResponse(userId, HELP_MESSAGE, HELP_REPROMPT);
break;
case PlantyRequestType.Stop:
webHookResp = GetDialogFlowResponse(userId, STOP_MESSAGE);
break;
case PlantyRequestType.HealthCheck:
webHookResp = GetDialogFlowResponse(userId, HELP_REPROMPT);
break;
}
responseJson = webHookResp?.ToString();
ContentResult contRes = new ContentResult()
{
Content = responseJson,
ContentType = "application/json",
StatusCode = 200
};
return contRes;
}
private static async Task<decimal> GetEquivalentIncome(WebhookRequest request)
{
var requestFields = request.QueryResult.Parameters.Fields;
var targetCity = requestFields["targetCity"].StringValue;
// var targetCurrency = requestFields["targetCurrency"].StringValue;
var baseCity = requestFields["baseCity"].StringValue;
var baseIncomeFields = requestFields["baseIncome"].StructValue.Fields;
var baseIncomeAmount = (int)baseIncomeFields["amount"].NumberValue;
var baseCurrency = baseIncomeFields["currency"].StringValue;
// TODO: Parameterize targetCurrency too
var targetCurrency = baseCurrency;
var response = await client.GetAsync(
// "http://localhost:5000/api/equivalent-income?"
"http://pc.planty-ideas.net:8080/api/equivalent-income?"
+ $"targetCity={targetCity}&targetCurrency={targetCurrency}"
+ $"&baseCity={baseCity}&baseIncomeAmount={baseIncomeAmount}&baseCurrency={baseCurrency}");
var incomeAmount = Decimal.Parse(await response.Content.ReadAsStringAsync());
return Math.Round(incomeAmount / 100) * 100;
}
private static WebhookResponse GetDialogFlowResponse(string userId, string message)
{
return GetDialogFlowResponse(userId, message, null);
}
private static WebhookResponse GetDialogFlowResponse(string userId, string message, string reprompt)
{
bool expectUserResp = !string.IsNullOrWhiteSpace(reprompt);
WebhookResponse webHookResp = InitializeResponse(expectUserResp, userId);
var fulfillmentMessage = webHookResp.FulfillmentMessages[0];
fulfillmentMessage.SimpleResponses = new Intent.Types.Message.Types.SimpleResponses();
var simpleResp = new Intent.Types.Message.Types.SimpleResponse();
simpleResp.Ssml = $"<speak>{message}</speak>";
fulfillmentMessage.SimpleResponses.SimpleResponses_.Add(simpleResp);
return webHookResp;
}
private static WebhookResponse InitializeResponse(bool expectUserInput, string userId)
{
WebhookResponse webResp = new WebhookResponse();
var message = new Intent.Types.Message();
webResp.FulfillmentMessages.Add(message);
message.Platform = Intent.Types.Message.Types.Platform.ActionsOnGoogle;
// var payload = Struct.Parser.ParseJson("{\"google\": { \"expectUserResponse\": true}} ");
//message.Payload = new
Value payloadVal = new Value();
payloadVal.StructValue = new Struct();
Value expectedUserResp = new Value();
expectedUserResp.BoolValue = expectUserInput;
payloadVal.StructValue.Fields.Add("expectUserResponse", expectedUserResp);
Value userStorageValue = new Value();
UserStorage userStorage = new UserStorage();
userStorage.UserId = userId;
userStorageValue.StringValue = JsonConvert.SerializeObject(userStorage);
payloadVal.StructValue.Fields.Add("userStorage", userStorageValue);
Struct payloadStruct = new Struct();
payloadStruct.Fields.Add("google", payloadVal);
webResp.Payload = payloadStruct;
return webResp;
}
private static PlantyRequestType GetPlantyRequestType(string intentName)
{
PlantyRequestType plantyReqType = PlantyRequestType.HealthCheck;
if(intentName.Equals("Default Welcome Intent", StringComparison.OrdinalIgnoreCase) ||
intentName.Equals("EquivalentIncomeEstimateIntent", StringComparison.OrdinalIgnoreCase))
{
plantyReqType = PlantyRequestType.EquivalentIncomeEstimate;
}
return plantyReqType;
}
internal static bool IsRepromptRequest(WebhookRequest request)
{
bool isRepromptRequest = false;
ListValue inputs = request.OriginalDetectIntentRequest.Payload?.Fields?["inputs"]?.ListValue;
if (inputs != null)
{
bool isIntentFound = false;
int valCount = 0;
while (!isIntentFound && valCount < inputs.Values.Count)
{
Value val = inputs.Values[valCount];
if (val.StructValue != null)
{
if (val.StructValue.Fields["intent"] != null)
{
string intentName = val.StructValue.Fields["intent"].StringValue;
isIntentFound = true;
if (intentName.Equals(INTENT_NOINPUT, StringComparison.OrdinalIgnoreCase))
{
isRepromptRequest = true;
}
}
}
valCount++;
}
}
return isRepromptRequest;
}
private static string GetUserId(WebhookRequest request)
{
string userId = null;
Struct intentRequestPayload = request.OriginalDetectIntentRequest?.Payload;
var userStruct = intentRequestPayload.Fields?["user"];
string userStorageText = null;
if ((userStruct?.StructValue?.Fields?.Keys.Contains("userStorage")).GetValueOrDefault(false))
{
userStorageText = userStruct?.StructValue?.Fields?["userStorage"]?.StringValue;
}
if (!string.IsNullOrWhiteSpace(userStorageText))
{
UserStorage userStore = JsonConvert.DeserializeObject<UserStorage>(userStorageText);
userId = userStore.UserId;
}
else
{
if ((userStruct?.StructValue?.Fields?.Keys.Contains("userId")).GetValueOrDefault(false))
{
userId = userStruct?.StructValue?.Fields?["userId"]?.StringValue;
}
if (string.IsNullOrWhiteSpace(userId))
{
// The user Id is not provided. Generate a new one and return it.
userId = Guid.NewGuid().ToString("N");
}
}
return userId;
}
public static bool IsHealthCheck(string requestBody, ILogger log)
{
bool isHealthCheck = false;
ConversationRequest convReq = null;
try
{
convReq = JsonConvert.DeserializeObject<ConversationRequest>(requestBody);
}
catch (Exception ex)
{
log.LogInformation(ex, "Web hook request is not a health check. Cannot deserialize request as a health check.");
}
var firstInput = convReq?.Inputs?.FirstOrDefault(x => (x.Intent?.Equals(INTENT_MAIN)).GetValueOrDefault(false));
if (firstInput != null)
{
var arg = firstInput.Arguments?.FirstOrDefault(x => (x.Name?.Equals("is_health_check")).GetValueOrDefault(false));
if (arg != null)
{
isHealthCheck = arg.BoolValue;
}
}
return isHealthCheck;
}
}
}