Add a minimal GraphQL API

1 files changed, 38 insertions, 0 deletions

diff --git a/app/graphql/types/query_type.rb b/app/graphql/types/query_type.rb
new file mode 100644
index 00000000000..029bbd098ad
--- /dev/null
+++ b/app/graphql/types/query_type.rb
@@ -0,0 +1,38 @@
+Types::QueryType = GraphQL::ObjectType.define do
+  name 'Query'
+
+  field :project, Types::ProjectType do
+    argument :full_path, !types.ID do
+      description 'The full path of the project, e.g., "gitlab-org/gitlab-ce"'
+    end
+
+    authorize :read_project
+
+    resolve Loaders::FullPathLoader[:project]
+  end
+
+  field :merge_request, Types::MergeRequestType do
+    argument :project, !types.ID do
+      description 'The full path of the target project, e.g., "gitlab-org/gitlab-ce"'
+    end
+
+    argument :iid, !types.ID do
+      description 'The IID of the merge request, e.g., "1"'
+    end
+
+    authorize :read_merge_request
+
+    resolve Loaders::IidLoader[:merge_request]
+  end
+
+  # Testing endpoint to validate the API with
+  field :echo, types.String do
+    argument :text, types.String
+
+    resolve -> (obj, args, ctx) do
+      username = ctx[:current_user]&.username
+
+      "#{username.inspect} says: #{args[:text]}"
+    end
+  end
+end