add cnaf champ

app/models/champs/cnaf_champ.rb

@@ -0,0 +1,42 @@
+# == Schema Information
+#
+# Table name: champs
+#
+#  id                             :integer          not null, primary key
+#  data                           :jsonb
+#  fetch_external_data_exceptions :string           is an Array
+#  private                        :boolean          default(FALSE), not null
+#  row                            :integer
+#  type                           :string
+#  value                          :string
+#  value_json                     :jsonb
+#  created_at                     :datetime
+#  updated_at                     :datetime
+#  dossier_id                     :integer
+#  etablissement_id               :integer
+#  external_id                    :string
+#  parent_id                      :bigint
+#  type_de_champ_id               :integer
+#
+class Champs::CnafChamp < Champs::TextChamp
+  store_accessor :value_json, :numero_allocataire, :code_postal
+
+  def fetch_external_data?
+    true
+  end
+
+  def fetch_external_data
+    APIParticulier::CnafAdapter.new(
+      procedure.api_particulier_token,
+      numero_allocataire,
+      code_postal,
+      procedure.api_particulier_sources
+    ).to_params
+  end
+
+  def external_id
+    if numero_allocataire.present? && code_postal.present?
+      { code_postal: code_postal, numero_allocataire: numero_allocataire }.to_json
+    end
+  end
+end

spec/factories/champ.rb

@@ -185,6 +185,10 @@ FactoryBot.define do
       type_de_champ { association :type_de_champ_annuaire_education, procedure: dossier.procedure }
     end
 
+    factory :champ_cnaf, class: 'Champs::CnafChamp' do
+      type_de_champ { association :type_de_champ_cnaf, procedure: dossier.procedure }
+    end
+
     factory :champ_siret, class: 'Champs::SiretChamp' do
       association :type_de_champ, factory: [:type_de_champ_siret]
       association :etablissement, factory: [:etablissement]

spec/models/champs/cnaf_champ_spec.rb

@@ -0,0 +1,36 @@
+describe Champs::CnafChamp, type: :model do
+  let(:champ) { described_class.new }
+
+  describe 'numero_allocataire and code_postal' do
+    before do
+      champ.numero_allocataire = '1234567'
+      champ.code_postal = '12345'
+    end
+
+    it 'saves numero_allocataire and code_postal' do
+      expect(champ.numero_allocataire).to eq('1234567')
+      expect(champ.code_postal).to eq('12345')
+    end
+  end
+
+  describe 'external_id' do
+    context 'when only one data is given' do
+      before do
+        champ.numero_allocataire = '1234567'
+        champ.save
+      end
+
+      it { expect(champ.external_id).to be_nil }
+    end
+
+    context 'when all data required for an external fetch are given' do
+      before do
+        champ.numero_allocataire = '1234567'
+        champ.code_postal = '12345'
+        champ.save
+      end
+
+      it { expect(JSON.parse(champ.external_id)).to eq({ "code_postal" => "12345", "numero_allocataire" => "1234567" }) }
+    end
+  end
+end