Add fake index query in production only suitable for preview apps

Author: KludgeKML

Diff for: app/controllers/api/local_authority_controller.rb

@@ -1,6 +1,8 @@
 module Api
   class LocalAuthorityController < Api::BaseController
     def index
+      return fake_index if Rails.env.production?
+
       postcode_lookup = PostcodeLookup.new(postcode)
 
       if postcode_lookup.local_custodian_codes.count == 1
@@ -15,8 +17,30 @@ def index
       render json: { errors: { "postcode": [e.message] } }, status:
     end
 
+    FAKE_ADDRESS_LIST = [
+      { address: "PEARDOWN HOUSE, FENAPPLE CLOSE, BREAM ROAD, WEST THYME, APPLETON, SW1A 2BB", slug: "dorset", name: "Dorset Council" },
+      { address: "STRAWBERRY COTTAGE, FENAPPLE CLOSE, BREAM ROAD, WEST THYME, APPLETON, SW1A 2BB", slug: "westminster", name: "City of Westminster" },
+    ].freeze
+
+    def fake_index
+      case postcode
+      when "BAD"
+        render json: { errors: { "postcode": I18n.t(LocationError.new("invalidPostcodeFormat").message) } }, status: :bad_request
+      when "SW1A 2AA"
+        redirect_to "/api/local-authority/westminster"
+      when "SW1A 2BB"
+        render json: { addresses: FAKE_ADDRESS_LIST }
+      else
+        render json: { errors: { "postcode": I18n.t(LocationError.new("noLaMatch").message) } }, status: :not_found
+      end
+    end
+
     def show
-      @local_authority = LocalAuthority.from_slug(params[:authority_slug])
+      @local_authority = if Rails.env.production?
+                           LocalAuthority.new({ "slug" => params[:authority_slug], "name" => params[:authority_slug].gsub("-", " ").titleize, "tier" => "unitary", "homepage_url" => "https://www.gov.uk" })
+                         else
+                           LocalAuthority.from_slug(params[:authority_slug])
+                         end
 
       render json: { local_authority: @local_authority.to_h }
     rescue GdsApi::HTTPNotFound