Add immutable configuration for metadata display fields

app/models/spotlight/blacklight_configuration.rb

@@ -96,6 +96,10 @@ def blacklight_config
           else
             set_index_field_defaults(v)
           end
+
+          v.immutable = Blacklight::OpenStructWithHashAccess.new(v.immutable)
+          v.merge! v.immutable.to_h.symbolize_keys
+
           v.upstream_if = v.if unless v.if.nil?
           v.if = :field_enabled? unless v.if == false
 
@@ -114,6 +118,9 @@ def blacklight_config
             set_show_field_defaults(v)
           end
 
+          v.immutable = Blacklight::OpenStructWithHashAccess.new(v.immutable)
+          v.merge! v.immutable.to_h.symbolize_keys
+
           v.upstream_if = v.if unless v.if.nil?
           v.if = :field_enabled? unless v.if == false
 

app/views/spotlight/metadata_configurations/_metadata_field.html.erb

@@ -8,9 +8,9 @@
         <%= field.hidden_field :label, value: index_field_label(nil, key), class: 'form-control input-sm', data: {:"edit-field-target" => 'true'} %>
        </div>
     </td>
-    <td class="checkbox-cell text-center"><%= field.check_box :show, inline: true, checked: config.show, label: "" %></td>
+    <td class="checkbox-cell text-center"><%= field.check_box :show, inline: true, checked: config.show, disabled: !config.immutable.show.nil?, label: "" %></td>
     <% available_view_fields.keys.each do |type| %>
-    <td class="checkbox-cell text-center"><%= field.check_box type, inline: true, checked: config.send(type), label: "" %></td>
+    <td class="checkbox-cell text-center"><%= field.check_box type, inline: true, checked: config.send(type), disabled: !config.immutable.send(type).nil?, label: "" %></td>
     <% end %>
   <% end %>
-</tr>
+</tr>

spec/models/spotlight/blacklight_configuration_spec.rb

@@ -183,10 +183,17 @@
       expect(subject.blacklight_config.index_fields['a'].list).to be_truthy
     end
 
+    it 'applies immutable values from the configuration' do
+      blacklight_config.add_index_field 'a', immutable: { something: 'set_in_configuration', another: 'immutable' }
+      subject.index_fields['a'] = { something: 'set_in_db' }
+      expect(subject.blacklight_config.index_fields['a'].something).to eq 'set_in_configuration'
+      expect(subject.blacklight_config.index_fields['a'].another).to eq 'immutable'
+    end
+
     context 'custom fields' do
       it 'includes any custom fields' do
         subject.index_fields['a'] = { enabled: true, list: true }
-        allow(subject).to receive_messages(custom_index_fields: { 'a' => double(if: nil, :if= => true, merge!: true, validate!: true, normalize!: true) })
+        allow(subject).to receive_messages(custom_index_fields: { 'a' => Blacklight::Configuration::IndexField.new(field: 'a') })
         expect(subject.blacklight_config.index_fields).to include('a')
       end
 
@@ -249,7 +256,7 @@
     it 'includes any custom fields' do
       subject.index_fields['a'] = { enabled: true, show: true }
 
-      allow(subject).to receive_messages(custom_index_fields: { 'a' => double(if: nil, :if= => true, merge!: true, validate!: true, normalize!: true) })
+      allow(subject).to receive_messages(custom_index_fields: { 'a' => Blacklight::Configuration::IndexField.new(field: 'a') })
 
       expect(subject.blacklight_config.show_fields).to include('a')
     end

spec/views/spotlight/metadata_configurations/_metadata_field.html.erb_spec.rb

@@ -12,12 +12,17 @@
     )
   end
 
-  let(:facet_field) { Blacklight::Configuration::FacetField.new }
+  let(:field) { Blacklight::Configuration::Field.new immutable: OpenStruct.new(another_view_type: false) }
   let(:builder) { ActionView::Helpers::FormBuilder.new 'z', nil, view, {} }
 
   it 'uses the index_field_label helper to render the label' do
     allow(view).to receive(:index_field_label).with(nil, 'some_key').and_return 'Some label'
-    render partial: p, locals: { key: 'some_key', config: facet_field, f: builder }
+    render partial: p, locals: { key: 'some_key', config: field, f: builder }
     expect(rendered).to have_selector '.field-label', text: 'Some label'
   end
+
+  it 'marks views as disabled if they are immutable' do
+    render partial: p, locals: { key: 'some_key', config: field, f: builder }
+    expect(rendered).to have_selector 'input[disabled][name="z[some_key][another_view_type]"]'
+  end
 end