Add TraderProfile model

app/models/TraderProfile.scala

@@ -0,0 +1,34 @@
+package models
+
+import cats.data.{Ior, IorNec}
+import cats.implicits._
+import pages.{HasNiphlPage, HasNirmsPage, NiphlNumberPage, NirmsNumberPage, UkimsNumberPage}
+import queries.Query
+
+final case class TraderProfile(
+                                ukimsNumber: String,
+                                nirmsNumber: Option[String],
+                                niphlNumber: Option[String]
+                              )
+
+object TraderProfile {
+
+  def build(answers: UserAnswers): IorNec[Query, TraderProfile] =
+    (
+      answers.getIor(UkimsNumberPage),
+      getNirms(answers),
+      getNiphl(answers)
+    ).parMapN(TraderProfile.apply)
+
+  private def getNirms(answers: UserAnswers): IorNec[Query, Option[String]] =
+    answers.getIor(HasNirmsPage).flatMap {
+      case true  => answers.getIor(NirmsNumberPage).map(Some(_))
+      case false => Ior.Right(None)
+    }
+
+  private def getNiphl(answers: UserAnswers): IorNec[Query, Option[String]] =
+    answers.getIor(HasNiphlPage).flatMap {
+      case true  => answers.getIor(NiphlNumberPage).map(Some(_))
+      case false => Ior.Right(None)
+    }
+}

app/models/UserAnswers.scala

@@ -16,8 +16,10 @@
 
 package models
 
+import cats.data.{IorNec, NonEmptyChain}
+import cats.implicits._
 import play.api.libs.json._
-import queries.{Gettable, Settable}
+import queries.{Gettable, Query, Settable}
 import uk.gov.hmrc.mongo.play.json.formats.MongoJavatimeFormats
 
 import java.time.Instant
@@ -32,6 +34,9 @@ final case class UserAnswers(
   def get[A](page: Gettable[A])(implicit rds: Reads[A]): Option[A] =
     Reads.optionNoError(Reads.at(page.path)).reads(data).getOrElse(None)
 
+  def getIor[A](page: Gettable[A])(implicit rds: Reads[A]): IorNec[Query, A] =
+    get(page).toRightIor(NonEmptyChain.one(page))
+
   def set[A](page: Settable[A], value: A)(implicit writes: Writes[A]): Try[UserAnswers] = {
 
     val updatedData = data.setObject(page.path, Json.toJson(value)) match {

project/AppDependencies.scala

@@ -9,7 +9,8 @@ object AppDependencies {
     play.sbt.PlayImport.ws,
     "uk.gov.hmrc"       %% "play-frontend-hmrc-play-30"    % "9.5.0",
     "uk.gov.hmrc"       %% "bootstrap-frontend-play-30"    % bootstrapVersion,
-    "uk.gov.hmrc.mongo" %% "hmrc-mongo-play-30"            % hmrcMongoVersion
+    "uk.gov.hmrc.mongo" %% "hmrc-mongo-play-30"            % hmrcMongoVersion,
+    "org.typelevel"     %% "cats-core"                     % "2.3.0"
   )
 
   val test = Seq(

test/models/TraderProfileSpec.scala

@@ -0,0 +1,90 @@
+package models
+
+import org.scalatest.{OptionValues, TryValues}
+import org.scalatest.freespec.AnyFreeSpec
+import org.scalatest.matchers.must.Matchers
+import pages._
+
+class TraderProfileSpec extends AnyFreeSpec with Matchers with TryValues with OptionValues {
+
+  ".build" - {
+
+    "must return a TraderProfile when all mandatory questions are answered" - {
+
+      "and all optional data is present" in {
+
+        val answers =
+          UserAnswers("id")
+            .set(UkimsNumberPage, "1").success.value
+            .set(HasNirmsPage, true).success.value
+            .set(NirmsNumberPage, "2").success.value
+            .set(HasNiphlPage, true).success.value
+            .set(NiphlNumberPage, "3").success.value
+
+        val (errors, data) = TraderProfile.build(answers).pad
+
+        data.value mustEqual TraderProfile("1", Some("2"), Some("3"))
+        errors must not be defined
+      }
+
+      "and all optional data is missing" in {
+
+        val answers =
+          UserAnswers("id")
+            .set(UkimsNumberPage, "1").success.value
+            .set(HasNirmsPage, false).success.value
+            .set(HasNiphlPage, false).success.value
+
+        val (errors, data) = TraderProfile.build(answers).pad
+
+        data.value mustEqual TraderProfile("1", None, None)
+        errors must not be defined
+      }
+    }
+
+    "must return errors" - {
+
+      "when all mandatory answers are missing" in {
+
+        val answers = UserAnswers("id")
+
+        val (errors, data) = TraderProfile.build(answers).pad
+
+        data must not be defined
+        errors.value.toChain.toList must contain theSameElementsAs Seq(
+          UkimsNumberPage,
+          HasNirmsPage,
+          HasNiphlPage
+        )
+      }
+
+      "when the user said they have a Nirms number but it is missing" in {
+
+        val answers =
+          UserAnswers("id")
+            .set(UkimsNumberPage, "1").success.value
+            .set(HasNirmsPage, true).success.value
+            .set(HasNiphlPage, false).success.value
+
+        val (errors, data) = TraderProfile.build(answers).pad
+
+        data must not be defined
+        errors.value.toChain.toList must contain only NirmsNumberPage
+      }
+
+      "when the user said they have a Niphl number but it is missing" in {
+
+        val answers =
+          UserAnswers("id")
+            .set(UkimsNumberPage, "1").success.value
+            .set(HasNirmsPage, false).success.value
+            .set(HasNiphlPage, true).success.value
+
+        val (errors, data) = TraderProfile.build(answers).pad
+
+        data must not be defined
+        errors.value.toChain.toList must contain only NiphlNumberPage
+      }
+    }
+  }
+}