Add graphql root types

app/graphql/api/v2/schema.rb

@@ -3,6 +3,9 @@ class Api::V2::Schema < GraphQL::Schema
   max_complexity 300
   max_depth 15
 
+  query Types::QueryType
+  mutation Types::MutationType
+
   def self.unauthorized_object(error)
     # Add a top-level error to the response instead of returning nil:
     raise GraphQL::ExecutionError.new("An object of type #{error.type.graphql_name} was hidden due to permissions", extensions: { code: :unauthorized })

app/graphql/types/mutation_type.rb

@@ -0,0 +1,4 @@
+module Types
+  class MutationType < Types::BaseObject
+  end
+end

app/graphql/types/query_type.rb

@@ -0,0 +1,27 @@
+module Types
+  class QueryType < Types::BaseObject
+    field :demarche, DemarcheType, null: false, description: "Informations concernant une démarche." do
+      argument :number, ID, "Numéro de la démarche.", required: true
+    end
+
+    field :dossier, DossierType, null: false, description: "Informations sur un dossier d'une démarche." do
+      argument :number, ID, "Numéro du dossier.", required: true
+    end
+
+    def demarche(number:)
+      Procedure.for_api_v2.find(number)
+    rescue => e
+      raise GraphQL::ExecutionError.new(e.message, extensions: { code: :not_found })
+    end
+
+    def dossier(number:)
+      Dossier.for_api_v2.find(number)
+    rescue => e
+      raise GraphQL::ExecutionError.new(e.message, extensions: { code: :not_found })
+    end
+
+    def self.accessible?(context)
+      context[:token] || context[:administrateur_id]
+    end
+  end
+end