added field for doi metadata in bibtex format

app/graphql/schema.graphql

@@ -49,6 +49,11 @@ type Affiliation {
 }
 
 type Audiovisual implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -480,6 +485,11 @@ type AudiovisualEdge {
 }
 
 type Collection implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -1135,6 +1145,11 @@ type DataCatalogEdge {
 }
 
 type DataPaper implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -1566,6 +1581,11 @@ type DataPaperEdge {
 }
 
 type Dataset implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -2111,6 +2131,11 @@ type Description {
 Information about DOIs
 """
 interface DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -2505,6 +2530,11 @@ interface DoiItem {
 }
 
 type Event implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -2921,6 +2951,11 @@ type EventConnection {
 }
 
 type EventData implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -3670,6 +3705,11 @@ type Identifier {
 }
 
 type Image implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -4101,6 +4141,11 @@ type ImageEdge {
 }
 
 type Instrument implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -4532,6 +4577,11 @@ type InstrumentEdge {
 }
 
 type InteractiveResource implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -5358,6 +5408,11 @@ type MemberPrefixEdge {
 }
 
 type Model implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -6009,6 +6064,11 @@ type OrganizationEdge {
 }
 
 type Other implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -6691,6 +6751,11 @@ type PersonEdge {
 }
 
 type PhysicalObject implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -7175,6 +7240,11 @@ type PrefixEdge {
 }
 
 type Publication implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -8778,6 +8848,11 @@ type Rights {
 }
 
 type Service implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -9209,6 +9284,11 @@ type ServiceEdge {
 }
 
 type Software implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -9672,6 +9752,11 @@ type SoftwareEdge {
 }
 
 type Sound implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -10158,6 +10243,11 @@ type TextRestriction {
 }
 
 type Thesis implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -10717,6 +10807,11 @@ type UsageReportEdge {
 }
 
 type Work implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """
@@ -11149,6 +11244,11 @@ type WorkEdge {
 }
 
 type Workflow implements DoiItem {
+  """
+  Metadata in bibtex format
+  """
+  bibtex: String
+
   """
   Total number of citations
   """

app/graphql/types/doi_item.rb

@@ -38,6 +38,7 @@ module DoiItem
     argument :style, String, required: false, default_value: "apa"
     argument :locale, String, required: false, default_value: "en-US"
   end
+  field :bibtex, String, null: true, description: "Metadata in bibtex format"
   field :reference_count, Int, null: true, description: "Total number of references"
   field :citation_count, Int, null: true, description: "Total number of citations"
   field :view_count, Int, null: true, description: "Total number of views"
@@ -186,6 +187,28 @@ def descriptions(first: nil)
     object.descriptions[0...first]
   end
 
+  def bibtex
+    pages = object.container.to_h["firstPage"].present? ? [object.container["firstPage"], object.container["lastPage"]].join("-") : nil
+
+    bib = {
+      bibtex_type: object.types["bibtex"].presence || "misc",
+      bibtex_key: normalize_doi(object.doi),
+      doi: object.doi,
+      url: object.url,
+      author: authors_as_string(object.creators),
+      keywords: object.subjects.present? ? Array.wrap(object.subjects).map { |k| parse_attributes(k, content: "subject", first: true) }.join(", ") : nil,
+      language: object.language,
+      title: parse_attributes(object.titles, content: "title", first: true),
+      journal: object.container && container["title"],
+      volume: object.container.to_h["volume"],
+      issue: object.container.to_h["issue"],
+      pages: pages,
+      publisher: object.publisher,
+      year: object.publication_year
+    }.compact
+    BibTeX::Entry.new(bib).to_s
+  end
+
   # defaults to style: apa and locale: en-US
   def formatted_citation(style: nil, locale: nil)
     cp = CiteProc::Processor.new(style: style || "apa", locale: locale || "en-US", format: "html")

spec/graphql/types/doi_item_spec.rb

@@ -26,6 +26,7 @@
     it { is_expected.to have_field(:member).of_type("Member") }
     it { is_expected.to have_field(:registrationAgency).of_type("String") }
     it { is_expected.to have_field(:formattedCitation).of_type("String") }
+    it { is_expected.to have_field(:bibtex).of_type("String") }
     it { is_expected.to have_field(:citationCount).of_type("Int") }
     it { is_expected.to have_field(:referenceCount).of_type("Int") }
     it { is_expected.to have_field(:viewCount).of_type("Int") }

spec/graphql/types/work_type_spec.rb

@@ -7,4 +7,34 @@
     it { is_expected.to have_field(:id).of_type(!types.ID) }
     it { is_expected.to have_field(:type).of_type("String!") }
   end
+
+  describe "find work", elasticsearch: true do
+    let!(:work) { create(:doi, aasm_state: "findable") }
+
+    before do
+      Doi.import
+      sleep 2
+    end
+
+    let(:query) do
+      %(query {
+        work(id: "https://doi.org/#{work.doi}") {
+          id
+          bibtex
+        }
+      })
+    end
+
+    it "returns work" do
+      response = LupoSchema.execute(query).as_json
+
+      expect(response.dig("data", "work", "id")).to eq("https://handle.test.datacite.org/#{work.doi.downcase}")
+      bibtex = BibTeX.parse(response.dig("data", "work", "bibtex")).to_a(quotes: '').first
+      expect(bibtex[:bibtex_type].to_s).to eq("misc")
+      expect(bibtex[:bibtex_key]).to eq("https://doi.org/#{work.doi.downcase}")
+      expect(bibtex[:author]).to eq("Ollomo, Benjamin and Durand, Patrick and Prugnolle, Franck and Douzery, Emmanuel J. P. and Arnathau, Céline and Nkoghe, Dieudonné and Leroy, Eric and Renaud, François")
+      expect(bibtex[:title]).to eq("Data from: A new malaria agent in African hominids.")
+      expect(bibtex[:year]).to eq("2011")
+    end
+  end
 end