Google Scholar (#2452)

* Google Scholar

* Fix

* Fix

* Memoize

* Better

* Lighter

app/models/research/journal/paper/localization.rb

@@ -69,6 +69,17 @@ class Research::Journal::Paper::Localization < ApplicationRecord
     contents_dependencies
   end
 
+  # TODO manage real authors (through people)
+  def authors_l10n_array
+    return [] if authors_list.blank?
+    @authors_l10n_array ||= authors_list.gsub(' & ', ',')
+                                        .gsub(' and ', ',')
+                                        .gsub(' et ', ',')
+                                        .split(',')
+                                        .collect(&:strip)
+                                        .compact_blank
+  end
+
   def journal_l10n
     paper.journal.localization_for(language)
   end

app/views/admin/research/journals/papers/static.html.erb

@@ -9,6 +9,25 @@ language = @l10n.language
             l10n: @l10n,
             full_width: false,
             toc_offcanvas: false %>
+metadata:
+  - name: "citation_title"
+    content: "<%= prepare_text_for_static @l10n.title %>"
+<% @l10n.authors_l10n_array.each do |author| %>
+  - name: "citation_author"
+    content: "<%= prepare_text_for_static author %>"
+<% end %>
+  - name: "citation_publication_date"
+    content: "<%= @l10n.published_at.strftime("%Y/%m/%d") %>"
+  - name: "citation_journal_title"
+    content: "<%= prepare_text_for_static paper.journal.to_s_in(language) %>"
+<% if @l10n.pdf.attached? %>
+  - name: "citation_pdf_url"
+    content: "<%= @l10n.pdf.blob_id %>"
+<% end %>
+<% if @l10n.volume_l10n %>
+  - name: "citation_volume"
+    content: "<%= prepare_text_for_static @l10n.volume_l10n.to_s %>"
+<% end %>
 <% if paper.kind %>
 paper_kind: "<%= prepare_text_for_static paper.kind %>"
 <% end %>