Add bare bones storage move API

Minimum required to add a new API

changelogs/unreleased/storage_move_api.yml

+---
+title: Read only storage move API
+merge_request: 31285
+author:
+type: added

lib/api/api.rb

@@ -180,6 +180,7 @@ class API < Grape::API
       mount ::API::ProjectImport
       mount ::API::ProjectHooks
       mount ::API::ProjectMilestones
+      mount ::API::ProjectRepositoryStorageMoves
       mount ::API::Projects
       mount ::API::ProjectSnapshots
       mount ::API::ProjectSnippets

lib/api/project_repository_storage_moves.rb

+# frozen_string_literal: true
+
+module API
+  class ProjectRepositoryStorageMoves < Grape::API
+    include PaginationParams
+
+    before { authenticated_as_admin! }
+
+    resource :project_repository_storage_moves do
+      desc 'Get a list of all project repository storage moves' do
+        detail 'This feature was introduced in GitLab 13.0.'
+        success Entities::ProjectRepositoryStorageMove
+      end
+      params do
+        use :pagination
+      end
+      get do
+        storage_moves = ProjectRepositoryStorageMove.all
+
+        present paginate(storage_moves), with: Entities::ProjectRepositoryStorageMove, current_user: current_user
+      end
+
+      desc 'Get a project repository storage move' do
+        detail 'This feature was introduced in GitLab 13.0.'
+        success Entities::ProjectRepositoryStorageMove
+      end
+      get ':id' do
+        storage_move = ProjectRepositoryStorageMove.find(params[:id])
+
+        present storage_move, with: Entities::ProjectRepositoryStorageMove, current_user: current_user
+      end
+    end
+  end
+end

spec/requests/api/project_repository_storage_moves_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe API::ProjectRepositoryStorageMoves do
+  let(:user) { create(:admin) }
+  let!(:storage_move) { create(:project_repository_storage_move, :scheduled) }
+
+  describe 'GET /project_repository_storage_moves' do
+    def get_project_repository_storage_moves
+      get api('/project_repository_storage_moves', user)
+    end
+
+    it 'returns project repository storage moves' do
+      get_project_repository_storage_moves
+
+      expect(response).to have_gitlab_http_status(:ok)
+      expect(response).to include_pagination_headers
+      expect(json_response).to be_an Array
+      expect(json_response.size).to eq(1)
+      expect(json_response.first['id']).to eq(storage_move.id)
+      expect(json_response.first['state']).to eq(storage_move.human_state_name)
+    end
+
+    it 'avoids N+1 queries', :request_store do
+      control = ActiveRecord::QueryRecorder.new { get_project_repository_storage_moves }
+
+      create(:project_repository_storage_move, :scheduled)
+
+      expect { get_project_repository_storage_moves }.not_to exceed_query_limit(control)
+    end
+  end
+
+  describe 'GET /project_repository_storage_moves/:id' do
+    it 'returns a project repository storage move' do
+      get api("/project_repository_storage_moves/#{storage_move.id}", user)
+
+      expect(response).to have_gitlab_http_status(:ok)
+      expect(json_response).to be_a Hash
+      expect(json_response['id']).to eq(storage_move.id)
+      expect(json_response['state']).to eq(storage_move.human_state_name)
+    end
+  end
+end