add gitlab project controller - still WIP

app/controllers/import/gitlab_project_controller.rb

+class Import::GitlabProjectController < Import::BaseController
+  before_action :verify_gitlab_project_import_enabled
+  before_action :gitlab_project_auth, except: :callback
+
+  rescue_from OAuth::Error, with: :gitlab_project_unauthorized
+
+  #TODO permissions stuff
+
+  def callback
+
+    redirect_to status_import_gitlab_project_url
+  end
+
+  def status
+    @repos = client.projects
+    @incompatible_repos = client.incompatible_projects
+
+    @already_added_projects = current_user.created_projects.where(import_type: "gitlab_project")
+    already_added_projects_names = @already_added_projects.pluck(:import_source)
+
+    @repos.to_a.reject!{ |repo| already_added_projects_names.include? "#{repo["owner"]}/#{repo["slug"]}" }
+  end
+
+  def jobs
+    jobs = current_user.created_projects.where(import_type: "gitlab_project").to_json(only: [:id, :import_status])
+    render json: jobs
+  end
+
+  def create
+    @file = params[:file]
+
+    repo_owner = current_user.username
+    @target_namespace = params[:new_namespace].presence || repo_owner
+
+    # namespace = get_or_create_namespace || (render and return)
+
+    @project = Gitlab::ImportExport::ImportService.execute(archive_file: file, owner: repo_owner)
+  end
+
+  private
+
+  def verify_gitlab_project_import_enabled
+    render_404 unless gitlab_project_import_enabled?
+  end
+end