Search both datasets for UPRN

app/services/uprn_client.rb

@@ -20,7 +20,7 @@ class UprnClient
   end
 
   def result
-    @result ||= JSON.parse(response.body).dig("results", 0, "DPA")
+    @result ||= JSON.parse(response.body).dig("results", 0, "DPA") || JSON.parse(response.body).dig("results", 0, "LPI")
   end
 
 private
@@ -39,6 +39,7 @@ private
     params = {
       uprn:,
       key: ENV["OS_DATA_KEY"],
+      dataset: %w[DPA LPI].join(","),
     }
     uri.query = URI.encode_www_form(params)
     uri.to_s

spec/services/exports/lettings_log_export_service_spec.rb

@@ -181,7 +181,7 @@ RSpec.describe Exports::LettingsLogExportService do
       before do
         Timecop.freeze(Time.zone.local(2023, 4, 3))
         Singleton.__init__(FormHandler)
-        stub_request(:get, "https://api.os.uk/search/places/v1/uprn?key=OS_DATA_KEY&uprn=100023336956")
+        stub_request(:get, "https://api.os.uk/search/places/v1/uprn?dataset=DPA,LPI&key=OS_DATA_KEY&uprn=100023336956")
          .to_return(status: 200, body: '{"status":200,"results":[{"DPA":{
           "PO_BOX_NUMBER": "fake",
       "ORGANISATION_NAME": "org",

spec/services/uprn_client_spec.rb

@@ -8,7 +8,7 @@ describe UprnClient do
   end
 
   def stub_api_request(body:, status: 200)
-    stub_request(:get, "https://api.os.uk/search/places/v1/uprn?key=OS_DATA_KEY&uprn=123")
+    stub_request(:get, "https://api.os.uk/search/places/v1/uprn?dataset=DPA,LPI&key=OS_DATA_KEY&uprn=123")
     .to_return(status:, body:, headers: {})
   end
 
@@ -37,7 +37,28 @@ describe UprnClient do
       end
     end
 
-    context "when results empty" do
+    context "when DPA results empty" do
+      context "and LPI result is present" do
+        let(:valid_lpi_response) do
+          { results: [{ LPI: { postcode: "LPI postcode" } }] }.to_json
+        end
+
+        before do
+          stub_api_request(body: valid_lpi_response, status: 200)
+
+          client.call
+        end
+
+        it "returns result" do
+          expect(client.result).to eq({ "postcode" => "LPI postcode" })
+        end
+
+        it "returns no error" do
+          expect(client.error).to be_nil
+        end
+      end
+
+      context "and LPI results empty" do
         before do
           stub_api_request(body: {}.to_json)
 
@@ -48,6 +69,7 @@ describe UprnClient do
           expect(client.error).to eq("UPRN is not recognised. Check the number, or enter the address")
         end
       end
+    end
 
     context "with results" do
       before do