Merge branch 'rc-improve-members-destroy-service' into 'master'

Improve `Members::DestroyService`

Part of #21979.

See merge request !6267

11 files changed, 140 insertions, 69 deletions

diff --git a/app/controllers/concerns/membership_actions.rb b/app/controllers/concerns/membership_actions.rb
index b8ed2c159a7..c13333641d3 100644
--- a/app/controllers/concerns/membership_actions.rb
+++ b/app/controllers/concerns/membership_actions.rb
@@ -15,18 +15,17 @@ module MembershipActions
   end
 
   def leave
-    @member = membershipable.members.find_by(user_id: current_user) ||
-      membershipable.requesters.find_by(user_id: current_user)
-    Members::DestroyService.new(@member, current_user).execute
+    member = Members::DestroyService.new(membershipable, current_user, user_id: current_user.id).
+      execute(:all)
 
-    source_type = @member.real_source_type.humanize(capitalize: false)
+    source_type = membershipable.class.to_s.humanize(capitalize: false)
     notice =
-      if @member.request?
+      if member.request?
         "Your access request to the #{source_type} has been withdrawn."
       else
-        "You left the \"#{@member.source.human_name}\" #{source_type}."
+        "You left the \"#{membershipable.human_name}\" #{source_type}."
       end
-    redirect_path = @member.request? ? @member.source : [:dashboard, @member.real_source_type.tableize]
+    redirect_path = member.request? ? member.source : [:dashboard, membershipable.class.to_s.tableize]
 
     redirect_to redirect_path, notice: notice
   end
diff --git a/app/controllers/groups/group_members_controller.rb b/app/controllers/groups/group_members_controller.rb
index 9c323d7705a..18cd800c619 100644
--- a/app/controllers/groups/group_members_controller.rb
+++ b/app/controllers/groups/group_members_controller.rb
@@ -40,10 +40,7 @@ class Groups::GroupMembersController < Groups::ApplicationController
   end
 
   def destroy
-    @group_member = @group.members.find_by(id: params[:id]) ||
-      @group.requesters.find_by(id: params[:id])
-
-    Members::DestroyService.new(@group_member, current_user).execute
+    Members::DestroyService.new(@group, current_user, id: params[:id]).execute(:all)
 
     respond_to do |format|
       format.html { redirect_to group_group_members_path(@group), notice: 'User was successfully removed from group.' }
diff --git a/app/controllers/projects/project_members_controller.rb b/app/controllers/projects/project_members_controller.rb
index 2343c7d20ec..f56b256984b 100644
--- a/app/controllers/projects/project_members_controller.rb
+++ b/app/controllers/projects/project_members_controller.rb
@@ -55,10 +55,8 @@ class Projects::ProjectMembersController < Projects::ApplicationController
   end
 
   def destroy
-    @project_member = @project.members.find_by(id: params[:id]) ||
-      @project.requesters.find_by(id: params[:id])
-
-    Members::DestroyService.new(@project_member, current_user).execute
+    Members::DestroyService.new(@project, current_user, params).
+      execute(:all)
 
     respond_to do |format|
       format.html do
diff --git a/app/services/members/authorized_destroy_service.rb b/app/services/members/authorized_destroy_service.rb
index ca9db59cac7..b7a244c2029 100644
--- a/app/services/members/authorized_destroy_service.rb
+++ b/app/services/members/authorized_destroy_service.rb
@@ -14,6 +14,8 @@ module Members
       if member.request? && member.user != user
         notification_service.decline_access_request(member)
       end
+
+      member
     end
   end
 end
diff --git a/app/services/members/destroy_service.rb b/app/services/members/destroy_service.rb
index 9a2bf82ef51..431da8372c9 100644
--- a/app/services/members/destroy_service.rb
+++ b/app/services/members/destroy_service.rb
@@ -1,17 +1,42 @@
 module Members
   class DestroyService < BaseService
-    attr_accessor :member, :current_user
+    include MembersHelper
 
-    def initialize(member, current_user)
-      @member = member
+    attr_accessor :source
+
+    ALLOWED_SCOPES = %i[members requesters all]
+
+    def initialize(source, current_user, params = {})
+      @source = source
       @current_user = current_user
+      @params = params
     end
 
-    def execute
-      unless member && can?(current_user, "destroy_#{member.type.underscore}".to_sym, member)
-        raise Gitlab::Access::AccessDeniedError
-      end
+    def execute(scope = :members)
+      raise "scope :#{scope} is not allowed!" unless ALLOWED_SCOPES.include?(scope)
+
+      member = find_member!(scope)
+
+      raise Gitlab::Access::AccessDeniedError unless can_destroy_member?(member)
+
       AuthorizedDestroyService.new(member, current_user).execute
     end
+
+    private
+
+    def find_member!(scope)
+      condition = params[:user_id] ? { user_id: params[:user_id] } : { id: params[:id] }
+      case scope
+      when :all
+        source.members.find_by(condition) ||
+          source.requesters.find_by!(condition)
+      else
+        source.public_send(scope).find_by!(condition)
+      end
+    end
+
+    def can_destroy_member?(member)
+      member && can?(current_user, action_member_permission(:destroy, member), member)
+    end
   end
 end
diff --git a/lib/api/access_requests.rb b/lib/api/access_requests.rb
index 7b9de7c9598..d3db7740830 100644
--- a/lib/api/access_requests.rb
+++ b/lib/api/access_requests.rb
@@ -75,9 +75,8 @@ module API
           required_attributes! [:user_id]
           source = find_source(source_type, params[:id])
 
-          access_requester = source.requesters.find_by!(user_id: params[:user_id])
-
-          ::Members::DestroyService.new(access_requester, current_user).execute
+          ::Members::DestroyService.new(source, current_user, params).
+            execute(:requesters)
         end
       end
     end
diff --git a/lib/api/members.rb b/lib/api/members.rb
index a18ce769e29..34df55fe192 100644
--- a/lib/api/members.rb
+++ b/lib/api/members.rb
@@ -134,7 +134,7 @@ module API
           if member.nil?
             { message: "Access revoked", id: params[:user_id].to_i }
           else
-            ::Members::DestroyService.new(member, current_user).execute
+            ::Members::DestroyService.new(source, current_user, params).execute
 
             present member.user, with: Entities::Member, member: member
           end
diff --git a/spec/controllers/groups/group_members_controller_spec.rb b/spec/controllers/groups/group_members_controller_spec.rb
index 92b97bf3d0c..a0870891cf4 100644
--- a/spec/controllers/groups/group_members_controller_spec.rb
+++ b/spec/controllers/groups/group_members_controller_spec.rb
@@ -87,10 +87,10 @@ describe Groups::GroupMembersController do
     context 'when member is not found' do
       before { sign_in(user) }
 
-      it 'returns 403' do
+      it 'returns 404' do
         delete :leave, group_id: group
 
-        expect(response).to have_http_status(403)
+        expect(response).to have_http_status(404)
       end
     end
 
diff --git a/spec/controllers/projects/project_members_controller_spec.rb b/spec/controllers/projects/project_members_controller_spec.rb
index 5e2a8cf3849..074f85157de 100644
--- a/spec/controllers/projects/project_members_controller_spec.rb
+++ b/spec/controllers/projects/project_members_controller_spec.rb
@@ -135,11 +135,11 @@ describe Projects::ProjectMembersController do
     context 'when member is not found' do
       before { sign_in(user) }
 
-      it 'returns 403' do
+      it 'returns 404' do
         delete :leave, namespace_id: project.namespace,
                        project_id: project
 
-        expect(response).to have_http_status(403)
+        expect(response).to have_http_status(404)
       end
     end
 
diff --git a/spec/requests/api/access_requests_spec.rb b/spec/requests/api/access_requests_spec.rb
index 905a7311372..b467890a403 100644
--- a/spec/requests/api/access_requests_spec.rb
+++ b/spec/requests/api/access_requests_spec.rb
@@ -195,7 +195,7 @@ describe API::AccessRequests, api: true  do
       end
 
       context 'when authenticated as the access requester' do
-        it 'returns 200' do
+        it 'deletes the access requester' do
           expect do
             delete api("/#{source_type.pluralize}/#{source.id}/access_requests/#{access_requester.id}", access_requester)
 
@@ -205,7 +205,7 @@ describe API::AccessRequests, api: true  do
       end
 
       context 'when authenticated as a master/owner' do
-        it 'returns 200' do
+        it 'deletes the access requester' do
           expect do
             delete api("/#{source_type.pluralize}/#{source.id}/access_requests/#{access_requester.id}", master)
 
@@ -213,6 +213,16 @@ describe API::AccessRequests, api: true  do
           end.to change { source.requesters.count }.by(-1)
         end
 
+        context 'user_id matches a member, not an access requester' do
+          it 'returns 404' do
+            expect do
+              delete api("/#{source_type.pluralize}/#{source.id}/access_requests/#{developer.id}", master)
+
+              expect(response).to have_http_status(404)
+            end.not_to change { source.requesters.count }
+          end
+        end
+
         context 'user_id does not match an existing access requester' do
           it 'returns 404' do
             expect do
diff --git a/spec/services/members/destroy_service_spec.rb b/spec/services/members/destroy_service_spec.rb
index 2395445e7fd..9995f3488af 100644
--- a/spec/services/members/destroy_service_spec.rb
+++ b/spec/services/members/destroy_service_spec.rb
@@ -2,70 +2,111 @@ require 'spec_helper'
 
 describe Members::DestroyService, services: true do
   let(:user) { create(:user) }
-  let(:project) { create(:project) }
-  let!(:member) { create(:project_member, source: project) }
+  let(:member_user) { create(:user) }
+  let(:project) { create(:project, :public) }
+  let(:group) { create(:group, :public) }
 
-  context 'when member is nil' do
-    before do
-      project.team << [user, :developer]
+  shared_examples 'a service raising ActiveRecord::RecordNotFound' do
+    it 'raises ActiveRecord::RecordNotFound' do
+      expect { described_class.new(source, user, params).execute }.to raise_error(ActiveRecord::RecordNotFound)
     end
+  end
 
-    it 'does not destroy the member' do
-      expect { destroy_member(nil, user) }.to raise_error(Gitlab::Access::AccessDeniedError)
+  shared_examples 'a service raising Gitlab::Access::AccessDeniedError' do
+    it 'raises Gitlab::Access::AccessDeniedError' do
+      expect { described_class.new(source, user, params).execute }.to raise_error(Gitlab::Access::AccessDeniedError)
     end
   end
 
-  context 'when current user cannot destroy the given member' do
-    before do
-      project.team << [user, :developer]
+  shared_examples 'a service destroying a member' do
+    it 'destroys the member' do
+      expect { described_class.new(source, user, params).execute }.to change { source.members.count }.by(-1)
+    end
+
+    context 'when the given member is an access requester' do
+      before do
+        source.members.find_by(user_id: member_user).destroy
+        source.request_access(member_user)
+      end
+      let(:access_requester) { source.requesters.find_by(user_id: member_user) }
+
+      it_behaves_like 'a service raising ActiveRecord::RecordNotFound'
+
+      %i[requesters all].each do |scope|
+        context "and #{scope} scope is passed" do
+          it 'destroys the access requester' do
+            expect { described_class.new(source, user, params).execute(scope) }.to change { source.requesters.count }.by(-1)
+          end
+
+          it 'calls Member#after_decline_request' do
+            expect_any_instance_of(NotificationService).to receive(:decline_access_request).with(access_requester)
+
+            described_class.new(source, user, params).execute(scope)
+          end
+
+          context 'when current user is the member' do
+            it 'does not call Member#after_decline_request' do
+              expect_any_instance_of(NotificationService).not_to receive(:decline_access_request).with(access_requester)
+
+              described_class.new(source, member_user, params).execute(scope)
+            end
+          end
+        end
+      end
     end
+  end
+
+  context 'when no member are found' do
+    let(:params) { { user_id: 42 } }
 
-    it 'does not destroy the member' do
-      expect { destroy_member(member, user) }.to raise_error(Gitlab::Access::AccessDeniedError)
+    it_behaves_like 'a service raising ActiveRecord::RecordNotFound' do
+      let(:source) { project }
+    end
+
+    it_behaves_like 'a service raising ActiveRecord::RecordNotFound' do
+      let(:source) { group }
     end
   end
 
-  context 'when current user can destroy the given member' do
+  context 'when a member is found' do
     before do
-      project.team << [user, :master]
+      project.team << [member_user, :developer]
+      group.add_developer(member_user)
     end
+    let(:params) { { user_id: member_user.id } }
 
-    it 'destroys the member' do
-      destroy_member(member, user)
+    context 'when current user cannot destroy the given member' do
+      it_behaves_like 'a service raising Gitlab::Access::AccessDeniedError' do
+        let(:source) { project }
+      end
 
-      expect(member).to be_destroyed
+      it_behaves_like 'a service raising Gitlab::Access::AccessDeniedError' do
+        let(:source) { group }
+      end
     end
 
-    context 'when the given member is a requester' do
+    context 'when current user can destroy the given member' do
       before do
-        member.update_column(:requested_at, Time.now)
+        project.team << [user, :master]
+        group.add_owner(user)
       end
 
-      it 'calls Member#after_decline_request' do
-        expect_any_instance_of(NotificationService).to receive(:decline_access_request).with(member)
-
-        destroy_member(member, user)
+      it_behaves_like 'a service destroying a member' do
+        let(:source) { project }
       end
 
-      context 'when current user is the member' do
-        it 'does not call Member#after_decline_request' do
-          expect_any_instance_of(NotificationService).not_to receive(:decline_access_request).with(member)
-
-          destroy_member(member, member.user)
-        end
+      it_behaves_like 'a service destroying a member' do
+        let(:source) { group }
       end
 
-      context 'when current user is the member and ' do
-        it 'does not call Member#after_decline_request' do
-          expect_any_instance_of(NotificationService).not_to receive(:decline_access_request).with(member)
+      context 'when given a :id' do
+        let(:params) { { id: project.members.find_by!(user_id: user.id).id } }
 
-          destroy_member(member, member.user)
+        it 'destroys the member' do
+          expect { described_class.new(project, user, params).execute }.
+            to change { project.members.count }.by(-1)
         end
       end
     end
   end
-
-  def destroy_member(member, user)
-    Members::DestroyService.new(member, user).execute
-  end
 end