Filter out unhealthy lead images from presenters payload

app/models/edition/lead_image.rb

@@ -28,6 +28,12 @@ def lead_image_caption
     end
   end
 
+  def lead_image_has_all_assets?
+    return true unless image_data.respond_to?(:all_asset_variants_uploaded?)
+
+    image_data.all_asset_variants_uploaded?
+  end
+
 private
 
   def placeholder_image_url

app/presenters/publishing_api/case_study_presenter.rb

@@ -54,7 +54,7 @@ def details
         first_public_at:,
         format_display_type: item.display_type_key,
       }
-      details_hash[:image] = if image_available? && image_required?
+      details_hash[:image] = if image_available? && image_required? && item.lead_image_has_all_assets?
                                image_details
                              else
                                { url: "", caption: nil, alt_text: "" }

app/presenters/publishing_api/news_article_presenter.rb

@@ -122,7 +122,7 @@ def initialize(news_article)
       end
 
       def call
-        return {} unless news_article.has_lead_image?
+        return {} unless news_article.has_lead_image? && news_article.lead_image_has_all_assets?
 
         {
           image: {

test/unit/app/models/edition/lead_image_test.rb

@@ -40,4 +40,31 @@ class Edition::LeadImageTest < ActiveSupport::TestCase
     assert_equal "url", model.lead_image_url
     assert_equal "alt_text", model.lead_image_alt_text
   end
+
+  test "#lead_image_has_all_assets? returns false if the lead image (ImageData) has missing assets" do
+    image_with_missing_assets = build(:image)
+    image_with_missing_assets.image_data.use_non_legacy_endpoints = true
+    image_with_missing_assets.image_data.assets << [build(:asset)]
+
+    model = stub("Target", { images: [image_with_missing_assets] }).extend(Edition::LeadImage)
+
+    assert_not model.lead_image_has_all_assets?
+  end
+
+  test "#lead_image_has_all_assets? returns true if the lead image (ImageData) has all assets" do
+    image_with_missing_assets = build(:image_with_assets)
+
+    model = stub("Target", { images: [image_with_missing_assets] }).extend(Edition::LeadImage)
+
+    assert model.lead_image_has_all_assets?
+  end
+
+  test "#lead_image_has_all_assets? returns true if the lead image data doesn't implement all_asset_variants_uploaded?" do
+    # e.g. DefaultNewsOrganisationImageData doesn't yet implement all_asset_variants_uploaded?
+    image = build(:default_news_organisation_image_data)
+    organisation = build(:organisation, default_news_image: image)
+    model = stub("Target", { images: [], lead_organisations: [], organisations: [organisation] }).extend(Edition::LeadImage)
+
+    assert model.lead_image_has_all_assets?
+  end
 end

test/unit/app/presenters/publishing_api/news_article_presenter_test.rb

@@ -237,6 +237,7 @@ class NewsArticleWithImage < TestCase
         high_resolution_lead_image_url: "/foo-large",
         lead_image_alt_text: "Bar",
         lead_image_caption: "Baz",
+        images: [build(:image)],
       )
     end