Boards - extract `Boards::UsersFinder`

ee/app/controllers/boards/users_controller.rb

@@ -5,10 +5,7 @@ module Boards
     # If board parent is a group it enumerates all members of current group,
     # ancestors, and descendants
     def index
-      user_ids = finder_service
-        .execute(include_descendants: true)
-        .non_invite
-        .select(:user_id)
+      user_ids = user_finder.execute.select(:user_id)
 
       users = User.where(id: user_ids)
 
@@ -17,13 +14,8 @@ module Boards
 
     private
 
-    def finder_service
-      @service ||=
-        if board_parent.is_a?(Group)
-          GroupMembersFinder.new(board_parent)
-        else
-          MembersFinder.new(board_parent, current_user)
-        end
+    def user_finder
+      @user_finder ||= Boards::UsersFinder.new(board, current_user)
     end
   end
 end

ee/app/finders/boards/users_finder.rb

+module Boards
+  class UsersFinder
+    def initialize(board, current_user = nil)
+      @board = board
+      @current_user = current_user
+    end
+
+    def execute
+      finder_service.execute(include_descendants: true).non_invite
+    end
+
+    private
+
+    def finder_service
+      @finder_service ||=
+        if @board.parent.is_a?(Group)
+          GroupMembersFinder.new(@board.parent)
+        else
+          MembersFinder.new(@board.parent, @current_user)
+        end
+    end
+  end
+end

ee/app/services/ee/boards/lists/create_service.rb

@@ -24,17 +24,12 @@ module EE
         end
 
         def find_user(board)
-          user_ids = user_finder(board).execute(include_descendants: true).non_invite.select(:user_id)
+          user_ids = user_finder(board).select(:user_id)
           ::User.where(id: user_ids).find(params[:assignee_id])
         end
 
         def user_finder(board)
-          @service ||=
-            if board.parent.is_a?(Group)
-              GroupMembersFinder.new(board.parent)
-            else
-              MembersFinder.new(board.parent, current_user)
-            end
+          @user_finder ||= Boards::UsersFinder.new(board, current_user)
         end
       end
     end

ee/spec/finders/boards/users_finder_spec.rb

+require 'spec_helper'
+
+describe Boards::UsersFinder do
+  describe '#execute' do
+    subject { described_class.new(board) }
+
+    context 'when parent is a project' do
+      let(:project) { create(:project) }
+      let(:board) { create(:board, project: project) }
+
+      it 'finds ProjectMembers with MemberFinder' do
+        results = subject.execute
+
+        expect(subject.instance_variable_get(:@finder_service)).to be_kind_of(MembersFinder)
+        expect(results.first).to be_kind_of(ProjectMember)
+      end
+    end
+
+    context 'when parent is a group' do
+      let(:group) { create(:group) }
+      let(:board) { create(:board, group: group) }
+      let(:user) { create(:user) }
+
+      before do
+        group.add_developer(user)
+      end
+
+      it 'finds GroupMembers with GroupMemberFinder' do
+        results = subject.execute
+
+        expect(subject.instance_variable_get(:@finder_service)).to be_kind_of(GroupMembersFinder)
+        expect(results.first).to be_kind_of(GroupMember)
+      end
+    end
+  end
+end