Extract some view logic into the presenter

app/components/blacklight_range_limit/range_facet_component.html.erb

@@ -10,7 +10,7 @@
       <% end %>
 
       <!-- no results profile if missing is selected -->
-      <% if @facet_field.missing_selected? %>
+      <% unless @facet_field.missing_selected? %>
         <!-- you can hide this if you want, but it has to be on page if you want
              JS slider and calculated facets to show up, JS sniffs it. -->
         <div class="profile">

app/presenters/blacklight_range_limit/facet_field_presenter.rb

@@ -35,8 +35,23 @@ def selected_range
       search_state.filter(key).values.first
     end
 
-    def missing
-      stats_for_field.fetch('missing', 0)
+    def selected_range_facet_item
+      return unless selected_range
+
+      Blacklight::Solr::Response::Facets::FacetItem.new(value: selected_range, hits: response.total)
+    end
+
+    def missing_facet_item
+      return unless missing.positive?
+
+      Blacklight::Solr::Response::Facets::FacetItem.new(
+        value: Blacklight::SearchState::FilterField::MISSING,
+        hits: missing
+      )
+    end
+
+    def missing_selected?
+      selected_range == Blacklight::SearchState::FilterField::MISSING
     end
 
     def range_config
@@ -45,6 +60,10 @@ def range_config
 
     private
 
+    def missing
+      stats_for_field.fetch('missing', 0)
+    end
+
     def stats_for_field
       response.dig('stats', 'stats_fields', facet_field.field) || {}
     end

spec/components/range_facet_component_spec.rb

@@ -21,11 +21,13 @@
       in_modal?: false,
       label: 'My facet field',
       selected_range: nil,
+      selected_range_facet_item: nil,
+      missing_facet_item: nil,
+      missing_selected?: false,
       min: nil,
       max: nil,
       search_state: Blacklight::SearchState.new({}, nil),
       range_config: {},
-      missing: 0,
       modal_path: nil,
       facet_field: facet_config,
       **facet_field_params
@@ -93,7 +95,13 @@
   end
 
   context 'with missing documents' do
-    let(:facet_field_params) { { missing: 50 } }
+    let(:facet_field_params) { { missing_facet_item: facet_item } }
+    let(:facet_item) do
+      Blacklight::Solr::Response::Facets::FacetItem.new(
+        value: Blacklight::SearchState::FilterField::MISSING,
+        hits: 50
+      )
+    end
 
     it 'renders a facet value for the documents that are missing the field data' do
       expected_facet_query_param = Regexp.new(Regexp.escape({ f: { '-key': ['[* TO *]'] } }.to_param))

spec/presenters/facet_field_presenter_spec.rb

@@ -116,15 +116,15 @@
     end
   end
 
-  describe '#missing' do
+  describe '#missing_facet_item' do
     let(:some_field_stats) do
       {
         missing: 5
       }
     end
 
     it 'extracts the missing stat' do
-      expect(presenter.missing).to eq 5
+      expect(presenter.missing_facet_item.hits).to eq 5
     end
   end