Implement as viewer instead of as partial addition

app/assets/javascripts/geoblacklight/viewers/oembed.js

@@ -0,0 +1,13 @@
+//= require geoblacklight/viewers/viewer
+
+GeoBlacklight.Viewer.Oembed = GeoBlacklight.Viewer.extend({
+  load: function() {
+    var $el = $(this.element);
+    $.getJSON(this.data.url, function(data){
+      if (data === null){
+        return;
+      }
+      $el.html(data.html);
+    });
+  },
+});

lib/generators/geoblacklight/templates/catalog_controller.rb

@@ -42,7 +42,6 @@ class CatalogController < ApplicationController
     # solr field configuration for document/show views
 
     config.show.display_type_field = 'format'
-    config.show.partials << 'show_default_oembed'
     config.show.partials << 'show_default_viewer_container'
     config.show.partials << 'show_default_attribute_table'
     config.show.partials << 'show_default_viewer_information'

lib/geoblacklight/item_viewer.rb

@@ -42,8 +42,12 @@ def index_map
       @references.index_map
     end
 
+    def oembed
+      @references.oembed
+    end
+
     def viewer_preference
-      [index_map, wms, iiif, tiled_map_layer, dynamic_map_layer,
+      [oembed, index_map, wms, iiif, tiled_map_layer, dynamic_map_layer,
        image_map_layer, feature_layer].compact.map(&:to_hash).first
     end
   end

spec/features/oembed_spec.rb

@@ -4,6 +4,6 @@
   scenario 'Should show oembed content and map' do
     visit solr_document_path('stanford-dc482zx1528')
     expect(page).to have_css '#map'
-    expect(page).to have_css '[data-embed-url]'
+    expect(page).to have_css '[data-protocol="Oembed"]'
   end
 end