[DLS-10533] migrating from http client to http client v2

app/uk/gov/hmrc/helptosave/actors/UCThresholdConnectorProxyActor.scala

@@ -34,40 +34,33 @@ class UCThresholdConnectorProxyActor(dESConnector: DESConnector, pagerDutyAlerti
 
   implicit val hc: HeaderCarrier = HeaderCarrier()
 
-  def getThreshold()(implicit hc: HeaderCarrier): Future[Either[String, Double]] =
-    dESConnector
-      .getThreshold()
-      .map[Either[String, Double]] { response =>
-        val additionalParams = "DesCorrelationId" -> response.correlationId
-
-        response.status match {
-          case Status.OK =>
-            val result = response.parseJson[UCThreshold]
-            result.fold(
-              { e =>
-                logger.warn(
-                  s"Could not parse JSON response from threshold, received 200 (OK): $e, with additionalParams: $additionalParams")
-                pagerDutyAlerting.alert("Could not parse JSON in UC threshold response")
-              },
-              _ =>
-                logger.debug(
-                  s"Call to threshold successful, received 200 (OK), with additionalParams: $additionalParams")
-            )
-            result.map(_.thresholdAmount)
-
-          case other =>
-            logger.warn(
-              s"Call to get threshold unsuccessful. Received unexpected status $other. " +
-                s"AdditionalParams: $additionalParams")
-            pagerDutyAlerting.alert("Received unexpected http status in response to get UC threshold from DES")
-            Left(s"Received unexpected status $other")
-        }
-      }
-      .recover {
-        case e =>
-          pagerDutyAlerting.alert("Failed to make call to get UC threshold from DES")
-          Left(s"Call to get threshold unsuccessful: ${e.getMessage}")
-      }
+  def getThreshold()(implicit hc: HeaderCarrier): Future[Either[String, Double]] = {
+         dESConnector.getThreshold()
+           .map(maybeThreshold => {
+               maybeThreshold.map(response => {
+                   val additionalParams = "DesCorrelationId" -> response.correlationId
+                   val result = response.parseJson[UCThreshold]
+                   result.fold(
+                       { e =>
+                           logger.warn(
+                               s"Could not parse JSON response from threshold, received 200 (OK): $e, with additionalParams: $additionalParams")
+                           pagerDutyAlerting.alert("Could not parse JSON in UC threshold response")
+                         },
+                       _ =>
+                       logger.debug(
+                           s"Call to threshold successful, received 200 (OK), with additionalParams: $additionalParams")
+                   )
+                   result.map(_.thresholdAmount)
+                 }).left.map(error => {
+                   val additionalParams = "DesCorrelationId" -> error.headers.getOrElse("CorrelationId", "-")
+                   logger.warn(
+                       s"Call to get threshold unsuccessful. Received unexpected status ${error.statusCode}. " +
+                           s"AdditionalParams: $additionalParams")
+                   pagerDutyAlerting.alert("Received unexpected http status in response to get UC threshold from DES")
+                   s"Received unexpected status ${error.statusCode}"
+                 })
+             }.flatten)
+       }
 
   override def receive: Receive = {
     case GetThresholdValue => getThreshold().map(GetThresholdValueResponse).pipeTo(sender())

app/uk/gov/hmrc/helptosave/config/AppConfig.scala

@@ -36,12 +36,12 @@ class AppConfig @Inject()(
 
   val appName: String = servicesConfig.getString("appName")
   val ifEnabled: Boolean = servicesConfig.getBoolean("feature.if.enabled")
-  val desHeaders: Map[String, String] = Map(
+  val desHeaders: Seq[(String, String)] = Seq(
     "Environment"   -> servicesConfig.getString("microservice.services.des.environment"),
     "Authorization" -> s"Bearer ${servicesConfig.getString("microservice.services.des.token")}"
   )
 
-  val ifHeaders: Map[String, String] = Map(
+  val ifHeaders: Seq[(String, String)] = Seq(
     "Environment"   -> servicesConfig.getString("microservice.services.if.environment"),
     "Authorization" -> s"Bearer ${servicesConfig.getString("microservice.services.if.token")}"
   )

app/uk/gov/hmrc/helptosave/connectors/BarsConnector.scala

@@ -19,13 +19,14 @@ package uk.gov.hmrc.helptosave.connectors
 import com.google.inject.{ImplementedBy, Inject, Singleton}
 import play.api.libs.json.{Format, Json}
 import uk.gov.hmrc.helptosave.config.AppConfig
-import uk.gov.hmrc.helptosave.http.HttpClient._
 import uk.gov.hmrc.helptosave.models.BankDetailsValidationRequest
 import uk.gov.hmrc.helptosave.util.Logging
-import uk.gov.hmrc.http.{HeaderCarrier, HttpClient, HttpResponse}
+import uk.gov.hmrc.http.{HeaderCarrier, HttpResponse, StringContextOps}
+import uk.gov.hmrc.http.client.HttpClientV2
 
 import java.util.UUID
 import scala.concurrent.{ExecutionContext, Future}
+import java.net.URL
 
 @ImplementedBy(classOf[BarsConnectorImpl])
 trait BarsConnector {
@@ -36,18 +37,19 @@ trait BarsConnector {
 }
 
 @Singleton
-class BarsConnectorImpl @Inject()(http: HttpClient)(implicit appConfig: AppConfig) extends BarsConnector with Logging {
+class BarsConnectorImpl @Inject()(http: HttpClientV2)(implicit appConfig: AppConfig) extends BarsConnector with Logging {
 
   import uk.gov.hmrc.helptosave.connectors.BarsConnectorImpl._
 
-  private val barsEndpoint: String = s"${appConfig.barsUrl}/validate/bank-details"
+  private val barsEndpoint: URL = url"${appConfig.barsUrl}/validate/bank-details"
 
-  private val headers = Map("Content-Type" -> "application/json")
+  private val headers:(String, String) = "Content-Type" -> "application/json"
 
   override def validate(request: BankDetailsValidationRequest, trackingId: UUID)(
     implicit hc: HeaderCarrier,
-    ec: ExecutionContext): Future[HttpResponse] =
-    http.post(barsEndpoint, bodyJson(request), headers.+("X-Tracking-Id" -> trackingId.toString))
+    ec: ExecutionContext): Future[HttpResponse] = {
+    http.post(barsEndpoint).withBody(bodyJson(request)).transform(_.addHttpHeaders(headers, "X-Tracking-Id" -> trackingId.toString)).execute[HttpResponse]
+  }
 
   private def bodyJson(request: BankDetailsValidationRequest) =
     Json.toJson(BarsRequest(Account(request.sortCode, request.accountNumber)))

app/uk/gov/hmrc/helptosave/connectors/DESConnector.scala

@@ -19,14 +19,16 @@ package uk.gov.hmrc.helptosave.connectors
 import cats.Show
 import cats.syntax.show._
 import com.google.inject.{ImplementedBy, Inject, Singleton}
-import play.api.libs.json.{JsNull, JsValue, Writes}
+import play.api.libs.json.{JsNull, JsValue}
 import uk.gov.hmrc.helptosave.config.AppConfig
-import uk.gov.hmrc.helptosave.http.HttpClient.HttpClientOps
 import uk.gov.hmrc.helptosave.models.UCResponse
 import uk.gov.hmrc.helptosave.util.{Logging, NINO}
-import uk.gov.hmrc.http.{HeaderCarrier, HttpClient, HttpResponse}
+import uk.gov.hmrc.http.HttpReads.Implicits._
+import uk.gov.hmrc.http.client.HttpClientV2
+import uk.gov.hmrc.http.{HeaderCarrier, HttpResponse, StringContextOps, UpstreamErrorResponse}
 import uk.gov.hmrc.play.bootstrap.config.ServicesConfig
 
+import java.net.URL
 import scala.concurrent.{ExecutionContext, Future}
 
 @ImplementedBy(classOf[DESConnectorImpl])
@@ -39,17 +41,17 @@ trait DESConnector {
 
   def getPersonalDetails(nino: NINO)(implicit hc: HeaderCarrier, ec: ExecutionContext): Future[HttpResponse]
 
-  def getThreshold()(implicit hc: HeaderCarrier, ec: ExecutionContext): Future[HttpResponse]
+  def getThreshold()(implicit hc: HeaderCarrier, ec: ExecutionContext): Future[Either[UpstreamErrorResponse, HttpResponse]]
 }
 
 @Singleton
-class DESConnectorImpl @Inject()(http: HttpClient, servicesConfig: ServicesConfig)(implicit appConfig: AppConfig)
+class DESConnectorImpl @Inject()(http: HttpClientV2, servicesConfig: ServicesConfig)(implicit appConfig: AppConfig)
     extends DESConnector with Logging {
 
   val itmpECBaseURL: String = servicesConfig.baseUrl("itmp-eligibility-check")
   val itmpEnrolmentURL: String = servicesConfig.baseUrl("itmp-enrolment")
   val payeURL: String = servicesConfig.baseUrl("paye-personal-details")
-  val itmpThresholdURL: String = s"${servicesConfig.baseUrl("itmp-threshold")}/universal-credits/threshold-amount"
+  val itmpThresholdURL: URL = url"${servicesConfig.baseUrl("itmp-threshold")}/universal-credits/threshold-amount"
 
   implicit val booleanShow: Show[Boolean] = Show.show(if (_) "Y" else "N")
 
@@ -58,51 +60,61 @@ class DESConnectorImpl @Inject()(http: HttpClient, servicesConfig: ServicesConfi
   val originatorIdHeader: (String, String) = "Originator-Id" -> servicesConfig.getString(
     "microservice.services.paye-personal-details.originatorId")
 
-  def eligibilityCheckUrl(nino: String): String = s"$itmpECBaseURL/help-to-save/eligibility-check/$nino"
+  def eligibilityCheckUrl(nino: String): URL = url"$itmpECBaseURL/help-to-save/eligibility-check/$nino"
 
-  def eligibilityCheckQueryParameters(ucResponse: Option[UCResponse]): Map[String, String] =
+  def eligibilityCheckQueryParameters(ucResponse: Option[UCResponse]) =
     ucResponse match {
-      case Some(UCResponse(a, Some(b))) => Map("universalCreditClaimant" -> a.show, "withinThreshold" -> b.show)
-      case Some(UCResponse(a, None))    => Map("universalCreditClaimant" -> a.show)
-      case _                            => Map()
+      case Some(UCResponse(a, Some(b))) => Seq("universalCreditClaimant" -> a.show, "withinThreshold" -> b.show)
+      case Some(UCResponse(a, None))    => Seq("universalCreditClaimant" -> a.show)
+      case _                            => Seq()
     }
 
-  def setFlagUrl(nino: NINO): String = s"$itmpEnrolmentURL/help-to-save/accounts/$nino"
+  def setFlagUrl(nino: NINO): URL = url"$itmpEnrolmentURL/help-to-save/accounts/$nino"
 
-  def payePersonalDetailsUrl(nino: String): String = s"$payeURL/pay-as-you-earn/02.00.00/individuals/$nino"
+  def payePersonalDetailsUrl(nino: String): URL = url"$payeURL/pay-as-you-earn/02.00.00/individuals/$nino"
 
   override def isEligible(nino: String, ucResponse: Option[UCResponse] = None)(
     implicit hc: HeaderCarrier,
     ec: ExecutionContext): Future[HttpResponse] = {
     logger.info(s"[DESConnector][isEligible] GET request: " +
       s" header - ${appConfig.desHeaders}" +
       s" eligibilityCheckUrl - ${eligibilityCheckUrl(nino)}")
-    http.get(eligibilityCheckUrl(nino), eligibilityCheckQueryParameters(ucResponse), appConfig.desHeaders)(
-      hc.copy(authorization = None),
-      ec)
+
+    http.get(eligibilityCheckUrl(nino))(hc.copy(authorization = None)).transform(_
+      .withQueryStringParameters(eligibilityCheckQueryParameters(ucResponse):_*)
+      .addHttpHeaders(appConfig.desHeaders:_*))
+      .execute[HttpResponse]
   }
 
   override def setFlag(nino: NINO)(implicit hc: HeaderCarrier, ec: ExecutionContext): Future[HttpResponse] = {
     logger.info(s"[DESConnector][setFlag] PUT request: " +
       s" header - ${appConfig.desHeaders} " +
       s" setFlagUrl - ${setFlagUrl(nino)}")
-    http.put(setFlagUrl(nino), body, appConfig.desHeaders)(Writes.jsValueWrites, hc.copy(authorization = None), ec)
+    http.put(setFlagUrl(nino))(hc.copy(authorization = None)).transform(_
+      .addHttpHeaders(appConfig.desHeaders: _*))
+      .withBody(body)
+      .execute[HttpResponse]
   }
 
   override def getPersonalDetails(nino: NINO)(implicit hc: HeaderCarrier, ec: ExecutionContext): Future[HttpResponse] = {
     logger.info(s"[DESConnector][getPersonalDetails] GET request: " +
-      s" header - ${appConfig.desHeaders+ originatorIdHeader}" +
+      s" header - ${appConfig.desHeaders:+ originatorIdHeader}" +
       s" payePersonalDetailsUrl - ${payePersonalDetailsUrl(nino)}")
-    http.get(payePersonalDetailsUrl(nino), headers = appConfig.desHeaders + originatorIdHeader)(
-      hc.copy(authorization = None),
-      ec)
+    http.get(payePersonalDetailsUrl(nino))(hc.copy(authorization = None)).transform(_
+      .addHttpHeaders(appConfig.desHeaders:+ originatorIdHeader:_*))
+      .execute[HttpResponse]
   }
 
-  override def getThreshold()(implicit hc: HeaderCarrier, ec: ExecutionContext): Future[HttpResponse] = {
+  override def getThreshold()(implicit hc: HeaderCarrier, ec: ExecutionContext): Future[Either[UpstreamErrorResponse, HttpResponse]] = {
     logger.info(s"[DESConnector][getThreshold] GET request: " +
       s"itmpThresholdURL - $itmpThresholdURL" +
-      s" header - ${appConfig.desHeaders + originatorIdHeader}")
-    http.get(itmpThresholdURL, headers = appConfig.desHeaders)(hc.copy(authorization = None), ec)
+      s" header - ${appConfig.desHeaders:+ originatorIdHeader}")
+    http.get(itmpThresholdURL)(hc.copy(authorization = None)).transform(_
+      .addHttpHeaders(appConfig.desHeaders:_*))
+      .execute[Either[UpstreamErrorResponse, HttpResponse]]
+      .map(_.fold(_ => Left(UpstreamErrorResponse("error occurred",500)),
+        _ => Right(HttpResponse(200)))
+      )
   }
 
 }