Add UPRN Presenter

app/services/uprn_data_presenter.rb

@@ -0,0 +1,41 @@
+require "net/http"
+
+class UprnDataPresenter
+  attr_reader :data
+
+  def initialize(data)
+    @data = data
+  end
+
+  def postcode
+    data["POSTCODE"]
+  end
+
+  def address_line1
+    data.values_at(
+      "PO_BOX_NUMBER",
+      "ORGANISATION_NAME",
+      "DEPARTMENT_NAME",
+      "SUB_BUILDING_NAME",
+      "BUILDING_NAME",
+      "BUILDING_NUMBER",
+      "DEPENDENT_THOROUGHFARE_NAME",
+      "THOROUGHFARE_NAME",
+    ).compact
+     .join(", ")
+     .titleize
+  end
+
+  def address_line2
+    data.values_at(
+      "DOUBLE_DEPENDENT_LOCALITY", "DEPENDENT_LOCALITY"
+    ).compact
+     .join(", ")
+     .titleize
+     .presence
+  end
+
+  def town_or_city
+    data["POST_TOWN"].titleize
+  end
+end

spec/services/uprn_data_presenter_spec.rb

@@ -0,0 +1,66 @@
+require "rails_helper"
+
+describe UprnDataPresenter do
+  let(:data) do
+    JSON.parse(
+      '{
+        "UPRN": "UPRN",
+        "UDPRN": "UDPRN",
+        "ADDRESS": "full address",
+        "SUB_BUILDING_NAME": "0",
+        "BUILDING_NAME": "building name",
+        "THOROUGHFARE_NAME": "thoroughfare",
+        "POST_TOWN": "posttown",
+        "POSTCODE": "postcode",
+        "STATUS": "APPROVED",
+        "DOUBLE_DEPENDENT_LOCALITY": "double dependent locality",
+        "DEPENDENT_LOCALITY": "dependent locality",
+        "CLASSIFICATION_CODE": "classification code",
+        "LOCAL_CUSTODIAN_CODE_DESCRIPTION": "LONDON BOROUGH OF HARINGEY",
+        "BLPU_STATE_CODE": "2",
+        "BLPU_STATE_CODE_DESCRIPTION": "In use",
+        "LAST_UPDATE_DATE": "31/07/2020",
+        "ENTRY_DATE": "30/01/2015",
+        "BLPU_STATE_DATE": "30/01/2015",
+        "LANGUAGE": "EN",
+        "MATCH_DESCRIPTION": "EXACT"
+      }',
+    )
+  end
+
+  let(:presenter) { described_class.new(data) }
+
+  describe "#postcode" do
+    it "returns postcode" do
+      expect(presenter.postcode).to eq("postcode")
+    end
+  end
+
+  describe "#address_line1" do
+    it "returns address_line1" do
+      expect(presenter.address_line1).to eq("0, Building Name, Thoroughfare")
+    end
+  end
+
+  describe "#address_line2" do
+    it "returns address_line2" do
+      expect(presenter.address_line2).to eq("Double Dependent Locality, Dependent Locality")
+    end
+  end
+
+  describe "#town_or_city" do
+    it "returns town_or_city" do
+      expect(presenter.town_or_city).to eq("Posttown")
+    end
+  end
+
+  context "when address_line2 fields are missing" do
+    let(:data) { {} }
+
+    describe "#address_line2" do
+      it "returns nil" do
+        expect(presenter.address_line2).to be_nil
+      end
+    end
+  end
+end