GraphQl: Allow filtering epics by negated parameters

Add negated params to epics resolver on GraphQL

doc/api/graphql/reference/index.md

@@ -7227,6 +7227,7 @@ four standard [pagination arguments](#connection-pagination-arguments):
 | <a id="boardepicchildrenlabelname"></a>`labelName` | [`[String!]`](#string) | Filter epics by labels. |
 | <a id="boardepicchildrenmilestonetitle"></a>`milestoneTitle` | [`String`](#string) | Filter epics by milestone title, computed from epic's issues. |
 | <a id="boardepicchildrenmyreactionemoji"></a>`myReactionEmoji` | [`String`](#string) | Filter by reaction emoji applied by the current user. |
+| <a id="boardepicchildrennot"></a>`not` | [`NegatedEpicFilterInput`](#negatedepicfilterinput) | Negated epic arguments. |
 | <a id="boardepicchildrensearch"></a>`search` | [`String`](#string) | Search query for epic title or description. |
 | <a id="boardepicchildrensort"></a>`sort` | [`EpicSort`](#epicsort) | List epics by sort order. |
 | <a id="boardepicchildrenstartdate"></a>`startDate` **{warning-solid}** | [`Time`](#time) | **Deprecated** in 13.5. Use timeframe.start. |
@@ -8382,6 +8383,7 @@ four standard [pagination arguments](#connection-pagination-arguments):
 | <a id="epicchildrenlabelname"></a>`labelName` | [`[String!]`](#string) | Filter epics by labels. |
 | <a id="epicchildrenmilestonetitle"></a>`milestoneTitle` | [`String`](#string) | Filter epics by milestone title, computed from epic's issues. |
 | <a id="epicchildrenmyreactionemoji"></a>`myReactionEmoji` | [`String`](#string) | Filter by reaction emoji applied by the current user. |
+| <a id="epicchildrennot"></a>`not` | [`NegatedEpicFilterInput`](#negatedepicfilterinput) | Negated epic arguments. |
 | <a id="epicchildrensearch"></a>`search` | [`String`](#string) | Search query for epic title or description. |
 | <a id="epicchildrensort"></a>`sort` | [`EpicSort`](#epicsort) | List epics by sort order. |
 | <a id="epicchildrenstartdate"></a>`startDate` **{warning-solid}** | [`Time`](#time) | **Deprecated** in 13.5. Use timeframe.start. |
@@ -8982,6 +8984,7 @@ Returns [`Epic`](#epic).
 | <a id="groupepiclabelname"></a>`labelName` | [`[String!]`](#string) | Filter epics by labels. |
 | <a id="groupepicmilestonetitle"></a>`milestoneTitle` | [`String`](#string) | Filter epics by milestone title, computed from epic's issues. |
 | <a id="groupepicmyreactionemoji"></a>`myReactionEmoji` | [`String`](#string) | Filter by reaction emoji applied by the current user. |
+| <a id="groupepicnot"></a>`not` | [`NegatedEpicFilterInput`](#negatedepicfilterinput) | Negated epic arguments. |
 | <a id="groupepicsearch"></a>`search` | [`String`](#string) | Search query for epic title or description. |
 | <a id="groupepicsort"></a>`sort` | [`EpicSort`](#epicsort) | List epics by sort order. |
 | <a id="groupepicstartdate"></a>`startDate` **{warning-solid}** | [`Time`](#time) | **Deprecated** in 13.5. Use timeframe.start. |
@@ -9024,6 +9027,7 @@ four standard [pagination arguments](#connection-pagination-arguments):
 | <a id="groupepicslabelname"></a>`labelName` | [`[String!]`](#string) | Filter epics by labels. |
 | <a id="groupepicsmilestonetitle"></a>`milestoneTitle` | [`String`](#string) | Filter epics by milestone title, computed from epic's issues. |
 | <a id="groupepicsmyreactionemoji"></a>`myReactionEmoji` | [`String`](#string) | Filter by reaction emoji applied by the current user. |
+| <a id="groupepicsnot"></a>`not` | [`NegatedEpicFilterInput`](#negatedepicfilterinput) | Negated epic arguments. |
 | <a id="groupepicssearch"></a>`search` | [`String`](#string) | Search query for epic title or description. |
 | <a id="groupepicssort"></a>`sort` | [`EpicSort`](#epicsort) | List epics by sort order. |
 | <a id="groupepicsstartdate"></a>`startDate` **{warning-solid}** | [`Time`](#time) | **Deprecated** in 13.5. Use timeframe.start. |
@@ -15971,6 +15975,16 @@ A node of an epic tree.
 | <a id="negatedepicboardissueinputlabelname"></a>`labelName` | [`[String]`](#string) | Filter by label name. |
 | <a id="negatedepicboardissueinputmyreactionemoji"></a>`myReactionEmoji` | [`String`](#string) | Filter by reaction emoji applied by the current user. |
 
+### `NegatedEpicFilterInput`
+
+#### Arguments
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="negatedepicfilterinputauthorusername"></a>`authorUsername` | [`String`](#string) | Filter by author username. |
+| <a id="negatedepicfilterinputlabelname"></a>`labelName` | [`[String]`](#string) | Filter by label name. |
+| <a id="negatedepicfilterinputmyreactionemoji"></a>`myReactionEmoji` | [`String`](#string) | Filter by reaction emoji applied by the current user. |
+
 ### `NegatedIssueFilterInput`
 
 #### Arguments

ee/app/graphql/resolvers/epics_resolver.rb

@@ -54,6 +54,10 @@ module Resolvers
              required: false,
              description: 'Filter by reaction emoji applied by the current user.'
 
+    argument :not, ::Types::Epics::NegatedEpicFilterInputType,
+             required: false,
+             description: 'Negated epic arguments.'
+
     type Types::EpicType, null: true
 
     def ready?(**args)

ee/app/graphql/types/epic_type.rb

@@ -177,7 +177,7 @@ module Types
     end
 
     def health_status
-      Epics::DescendantCountService.new(object, context[:current_user])
+      ::Epics::DescendantCountService.new(object, context[:current_user])
     end
   end
 end

ee/app/graphql/types/epics/negated_epic_filter_input_type.rb

+# frozen_string_literal: true
+
+module Types
+  module Epics
+    class NegatedEpicFilterInputType < BaseInputObject
+      argument :label_name, [GraphQL::STRING_TYPE, null: true],
+               required: false,
+               description: 'Filter by label name.'
+
+      argument :author_username, GraphQL::STRING_TYPE,
+               required: false,
+               description: 'Filter by author username.'
+
+      argument :my_reaction_emoji, GraphQL::STRING_TYPE,
+               required: false,
+               description: 'Filter by reaction emoji applied by the current user.'
+    end
+  end
+end

ee/changelogs/unreleased/issue_273459.yml

+---
+title: 'GraphQL: Allow filtering epics by negated parameters'
+merge_request: 61823
+author:
+type: added

ee/spec/graphql/resolvers/epics_resolver_spec.rb

@@ -263,6 +263,36 @@ RSpec.describe Resolvers::EpicsResolver do
         end
       end
     end
+
+    context 'with negated filters' do
+      let_it_be(:group) { create(:group) }
+      let_it_be(:author) { create(:user) }
+      let_it_be(:label) { create(:label) }
+      let_it_be(:epic_1) { create(:labeled_epic, group: group, labels: [label]) }
+      let_it_be(:epic_2) { create(:epic, group: group, author: author) }
+      let_it_be(:epic_3) { create(:epic, group: group) }
+      let_it_be(:awarded_emoji) { create(:award_emoji, name: 'thumbsup', awardable: epic_3, user: current_user) }
+
+      subject(:results) { resolve_epics(args) }
+
+      context 'for label' do
+        let(:args) { { not: { label_name: [label.title] } } }
+
+        it { is_expected.to contain_exactly(epic_2, epic_3) }
+      end
+
+      context 'for author' do
+        let(:args) { { not: { author_username: author.username } } }
+
+        it { is_expected.to contain_exactly(epic_1, epic_3) }
+      end
+
+      context 'for emoji' do
+        let(:args) { { not: { my_reaction_emoji: awarded_emoji.name } } }
+
+        it { is_expected.to contain_exactly(epic_1, epic_2) }
+      end
+    end
   end
 
   context "when passing a non existent, batch loaded group" do

ee/spec/requests/api/graphql/group/epics_spec.rb

@@ -200,6 +200,17 @@ RSpec.describe 'Epics through GroupQuery' do
           end.not_to exceed_all_query_limit(control_count + 5)
         end
       end
+
+      context 'with negated filters' do
+        it 'returns only matching epics' do
+          filter_params = { not: { author_username: user2.username } }
+          graphql_query = query(filter_params)
+
+          post_graphql(graphql_query, current_user: user)
+
+          expect_array_response([epic.to_global_id.to_s])
+        end
+      end
     end
 
     context 'when error requests' do