Add endpoint to move multiple issues

Add specs for new endpoint to move multiple issues.
Add changelog entry

Just check the first issue for the ability to move / update

Add specs for exceeding limits and malformed requests

Changed name of shared examples

Change title of changelog entry

Use %i instead of %w

Check permission to update issue on project instead of board

Use admin_issue permission to check for issue move ability

Changed variable name to avoid shadow issue_params method

Rename route to bulk_move

Change route definition

Check permissions for each issue

Combine methods for parameters permit check

Remove extra context

Change description of context

Check param for type Array

Add unit tests to MoveService

Use before_action for permission check

Use set instead of let!

Use let's instead of set

1 files changed, 32 insertions, 3 deletions

diff --git a/app/controllers/boards/issues_controller.rb b/app/controllers/boards/issues_controller.rb
index 0dd7500623d..353a9806fd1 100644
--- a/app/controllers/boards/issues_controller.rb
+++ b/app/controllers/boards/issues_controller.rb
@@ -2,16 +2,24 @@
 
 module Boards
   class IssuesController < Boards::ApplicationController
+    # This is the maximum amount of issues which can be moved by one request to
+    # bulk_move for now. This is temporary and might be removed in future by
+    # introducing an alternative (async?) approach.
+    # (related: https://gitlab.com/groups/gitlab-org/-/epics/382)
+    MAX_MOVE_ISSUES_COUNT = 50
+
     include BoardsResponses
     include ControllerWithCrossProjectAccessCheck
 
     requires_cross_project_access if: -> { board&.group_board? }
 
-    before_action :whitelist_query_limiting, only: [:index, :update]
+    before_action :whitelist_query_limiting, only: [:index, :update, :bulk_move]
     before_action :authorize_read_issue, only: [:index]
     before_action :authorize_create_issue, only: [:create]
     before_action :authorize_update_issue, only: [:update]
     skip_before_action :authenticate_user!, only: [:index]
+    before_action :validate_id_list, only: [:bulk_move]
+    before_action :can_move_issues?, only: [:bulk_move]
 
     # rubocop: disable CodeReuse/ActiveRecord
     def index
@@ -46,6 +54,17 @@ module Boards
       end
     end
 
+    def bulk_move
+      service = Boards::Issues::MoveService.new(board_parent, current_user, move_params(true))
+
+      issues = Issue.find(params[:ids])
+      if service.execute_multiple(issues)
+        head :ok
+      else
+        head :unprocessable_entity
+      end
+    end
+
     def update
       service = Boards::Issues::MoveService.new(board_parent, current_user, move_params)
 
@@ -58,6 +77,10 @@ module Boards
 
     private
 
+    def can_move_issues?
+      head(:forbidden) unless can?(current_user, :admin_issue, board)
+    end
+
     def render_issues(issues, metadata)
       data = { issues: serialize_as_json(issues) }
       data.merge!(metadata)
@@ -90,8 +113,9 @@ module Boards
                    end
     end
 
-    def move_params
-      params.permit(:board_id, :id, :from_list_id, :to_list_id, :move_before_id, :move_after_id)
+    def move_params(multiple = false)
+      id_param = multiple ? :ids : :id
+      params.permit(id_param, :board_id, :from_list_id, :to_list_id, :move_before_id, :move_after_id)
     end
 
     def issue_params
@@ -112,5 +136,10 @@ module Boards
       # Also see https://gitlab.com/gitlab-org/gitlab-ce/issues/42439
       Gitlab::QueryLimiting.whitelist('https://gitlab.com/gitlab-org/gitlab-ce/issues/42428')
     end
+
+    def validate_id_list
+      head(:bad_request) unless params[:ids].is_a?(Array)
+      head(:unprocessable_entity) if params[:ids].size > MAX_MOVE_ISSUES_COUNT
+    end
   end
 end