Show PDF.js viewer when PDF.js FlipFlop is true

This is a workaround to unblock Mobius ingests. If the feature flipper to display PDF.js is true, we will display that viewer regardless of the property values of :show_pdf_viewer and :show_pdf_download_button.

We will revisit valkyrizing this feature fully in the future, when we start the iiif x valkyrie epic.

Issue:
- scientist-softserv/hykuup_knapsack#185

Co-Authored-By: Kirk Wang <k3wang@gmail.com>

app/forms/generic_work_resource_form.rb

@@ -10,5 +10,6 @@ class GenericWorkResourceForm < Hyrax::Forms::ResourceForm(GenericWorkResource)
   include Hyrax::FormFields(:generic_work_resource)
   include Hyrax::FormFields(:with_pdf_viewer)
   include Hyrax::FormFields(:with_video_embed)
+  include PdfBehavior
   include VideoEmbedBehavior::Validation
 end

app/forms/image_resource_form.rb

@@ -10,5 +10,6 @@ class ImageResourceForm < Hyrax::Forms::ResourceForm(ImageResource)
   include Hyrax::FormFields(:image_resource)
   include Hyrax::FormFields(:with_pdf_viewer)
   include Hyrax::FormFields(:with_video_embed)
+  include PdfBehavior
   include VideoEmbedBehavior::Validation
 end

app/helpers/pdf_js_helper.rb

@@ -21,12 +21,16 @@ def query_param
   end
 
   def render_show_pdf_behavior_checkbox?
-    return unless Flipflop.default_pdf_viewer?
-    return if params[:id].nil?
+    # we are showing PDF.js based on the FlipFlop value
+    # instead of checking for the property value.
+    # TODO: Valkyrize PDF.js feature
+    false
+    # return unless Flipflop.default_pdf_viewer?
+    # return if params[:id].nil?
 
-    doc = SolrDocument.find params[:id]
+    # doc = SolrDocument.find params[:id]
 
-    presenter = @_controller.show_presenter.new(doc, current_ability)
-    presenter.file_set_presenters.any?(&:pdf?)
+    # presenter = @_controller.show_presenter.new(doc, current_ability)
+    # presenter.file_set_presenters.any?(&:pdf?)
   end
 end

app/models/concerns/pdf_behavior.rb

@@ -12,19 +12,20 @@ class CustomShowPdfDownloadButtonTerm < Vocabulary('http://id.loc.gov/vocabulary
 
 module PdfBehavior
   extend ActiveSupport::Concern
+  # TODO: Valkyrize PDF.js feature
 
   included do
     property :show_pdf_viewer, predicate: RDF::CustomShowPdfViewerTerm.show_pdf_viewer, multiple: false do |index|
-      index.as :stored_searchable
+      # index.as :stored_searchable
     end
 
     # rubocop:disable Metrics/LineLength
     property :show_pdf_download_button, predicate: RDF::CustomShowPdfDownloadButtonTerm.show_pdf_download_button, multiple: false do |index|
-      index.as :stored_searchable
+      # index.as :stored_searchable
     end
     # rubocop:enable Metrics/LineLength
 
-    after_initialize :set_default_show_pdf_viewer, :set_default_show_pdf_download_button
+    # after_initialize :set_default_show_pdf_viewer, :set_default_show_pdf_download_button
   end
 
   private

app/presenters/hyku/work_show_presenter.rb

@@ -74,11 +74,13 @@ def user_can_feature_collection?
     # End Featured Collections Methods
 
     def show_pdf_viewer?
-      return unless Flipflop.default_pdf_viewer?
-      return unless show_pdf_viewer
-      return unless file_set_presenters.any?(&:pdf?)
+      Flipflop.default_pdf_viewer?
+      # TODO: Valkyrize PDF.js feature
+      # return unless Flipflop.default_pdf_viewer?
+      # return unless show_pdf_viewer
+      # return unless file_set_presenters.any?(&:pdf?)
 
-      show_pdf_viewer.first.to_i.positive?
+      # show_pdf_viewer.first.to_i.positive?
     end
 
     def show_pdf_download_button?

app/views/hyrax/base/_pdf_js.erb

@@ -1,7 +1,11 @@
 <div class="viewer-wrapper">
-  <iframe id="pdf-viewer" aria-label="image view"
-    src="<%= pdf_js_url(hyrax.download_path(file_set_presenter.id)) %>"
-    allowfullscreen="true"
-    frameborder="0"
-  ></iframe>
+  <% if file_set_presenter %>
+    <iframe id="pdf-viewer" aria-label="image view"
+      src="<%= pdf_js_url(hyrax.download_path(file_set_presenter.id)) %>"
+      allowfullscreen="true"
+      frameborder="0"
+    ></iframe>
+  <% else %>
+    <%# TODO: ....%>
+  <% end %>
 </div>