Merge pull request #3908 from alphagov/update-world-index-shape

Update GraphQL approach for world index

app/controllers/world_controller.rb

@@ -1,13 +1,14 @@
 class WorldController < ApplicationController
   def index
     if Features.graphql_feature_enabled? || params.include?(:graphql)
-      index = WorldIndexGraphql.find!("/world")
-      @presented_index = WorldIndexGraphqlPresenter.new(index)
+      world_index = Graphql::WorldIndex.find!(request.path)
+      content_item_data = world_index.content_item
     else
-      index = WorldIndex.find!("/world")
-      @presented_index = WorldIndexPresenter.new(index)
+      world_index = WorldIndex.find!(request.path)
+      content_item_data = world_index.content_item.content_item_data
     end
 
-    setup_content_item_and_navigation_helpers(index)
+    @presented_index = WorldIndexPresenter.new(content_item_data)
+    setup_content_item_and_navigation_helpers(world_index)
   end
 end

app/models/graphql/world_index.rb

@@ -0,0 +1,17 @@
+class Graphql::WorldIndex
+  attr_reader :content_item
+
+  def initialize(content_item)
+    @content_item = content_item
+  end
+
+  def self.find!(base_path)
+    query = Graphql::WorldIndexQuery.new(base_path).query
+
+    edition = Services.publishing_api.graphql_query(query)
+      .dig("data", "edition")
+      .deep_transform_keys(&:underscore)
+
+    new(edition)
+  end
+end

app/presenters/world_index_presenter.rb

@@ -4,22 +4,22 @@ class WorldIndexPresenter
   delegate :count, to: :world_locations, prefix: true
   delegate :count, to: :international_delegations, prefix: true
 
-  def initialize(world_index)
-    @world_index = world_index
+  def initialize(content_item_data)
+    @content_item_data = content_item_data
   end
 
   def title
-    @world_index.content_item.title
+    @content_item_data.fetch("title")
   end
 
   def grouped_world_locations
-    world_locations
+    @content_item_data.dig("details", "world_locations")
       .group_by { |location| location_group(location) }
       .sort
   end
 
   def international_delegations
-    details["international_delegations"]
+    @content_item_data.dig("details", "international_delegations")
   end
 
   def world_location_link(world_location)
@@ -45,10 +45,10 @@ def location_group(location)
   end
 
   def details
-    @world_index.content_item.details
+    @content_item_data.fetch("details")
   end
 
   def world_locations
-    details["world_locations"]
+    @content_item_data.dig("details", "world_locations")
   end
 end

app/queries/graphql/world_index_query.rb

@@ -16,12 +16,14 @@ def query
           ... on WorldIndex {
             title
 
-            worldLocations {
-              ...worldLocationInfo
-            }
+            details {
+              worldLocations {
+                ...worldLocationInfo
+              }
 
-            internationalDelegations {
-              ...worldLocationInfo
+              internationalDelegations {
+                ...worldLocationInfo
+              }
             }
           }
         }