Allow reading severity of Issuable

Issuable returns incident severity

app/graphql/types/issuable_severity_enum.rb

+# frozen_string_literal: true
+
+module Types
+  class IssuableSeverityEnum < BaseEnum
+    graphql_name 'IssuableSeverity'
+    description 'Incident severity'
+
+    ::IssuableSeverity.severities.keys.each do |severity|
+      value severity.upcase, value: severity, description: "#{severity.titleize} severity"
+    end
+  end
+end

app/graphql/types/issue_type.rb

@@ -106,6 +106,9 @@ module Types
           Types::AlertManagement::AlertType,
           null: true,
           description: 'Alert associated to this issue'
+
+    field :severity, Types::IssuableSeverityEnum, null: true,
+          description: 'Severity level of the incident'
   end
 end
 

app/models/concerns/issuable.rb

@@ -189,6 +189,12 @@ module Issuable
       is_a?(Issue) && super
     end
 
+    def severity
+      return IssuableSeverity::DEFAULT unless incident?
+
+      issuable_severity&.severity || IssuableSeverity::DEFAULT
+    end
+
     private
 
     def description_max_length_for_new_records_is_valid

app/models/issuable_severity.rb

 # frozen_string_literal: true
 
 class IssuableSeverity < ApplicationRecord
+  DEFAULT = 'unknown'
+
   belongs_to :issue
 
   validates :issue, presence: true, uniqueness: true

app/models/issue.rb

@@ -60,6 +60,7 @@ class Issue < ApplicationRecord
     end
   end
 
+  has_one :issuable_severity
   has_one :sentry_issue
   has_one :alert_management_alert, class_name: 'AlertManagement::Alert'
   has_and_belongs_to_many :self_managed_prometheus_alert_events, join_table: :issues_self_managed_prometheus_alert_events # rubocop: disable Rails/HasAndBelongsToMany

changelogs/unreleased/238568-add-incident-severity-to-issue-graphql-query.yml

+---
+title: Exposes Incident's severity via GraphQL
+merge_request: 40945
+author:
+type: added

doc/api/graphql/reference/gitlab_schema.graphql

@@ -5564,6 +5564,11 @@ type EpicIssue implements Noteable {
   """
   relativePosition: Int
 
+  """
+  Severity level of the incident
+  """
+  severity: IssuableSeverity
+
   """
   State of the issue
   """
@@ -7032,6 +7037,36 @@ type InstanceSecurityDashboard {
   ): VulnerabilityScannerConnection
 }
 
+"""
+Incident severity
+"""
+enum IssuableSeverity {
+  """
+  Critical severity
+  """
+  CRITICAL
+
+  """
+  High severity
+  """
+  HIGH
+
+  """
+  Low severity
+  """
+  LOW
+
+  """
+  Medium severity
+  """
+  MEDIUM
+
+  """
+  Unknown severity
+  """
+  UNKNOWN
+}
+
 """
 State of a GitLab issue or merge request
 """
@@ -7278,6 +7313,11 @@ type Issue implements Noteable {
   """
   relativePosition: Int
 
+  """
+  Severity level of the incident
+  """
+  severity: IssuableSeverity
+
   """
   State of the issue
   """

doc/api/graphql/reference/gitlab_schema.json

@@ -15512,6 +15512,20 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "severity",
+              "description": "Severity level of the incident",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "ENUM",
+                "name": "IssuableSeverity",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "state",
               "description": "State of the issue",
@@ -19423,6 +19437,47 @@
           "enumValues": null,
           "possibleTypes": null
         },
+        {
+          "kind": "ENUM",
+          "name": "IssuableSeverity",
+          "description": "Incident severity",
+          "fields": null,
+          "inputFields": null,
+          "interfaces": null,
+          "enumValues": [
+            {
+              "name": "UNKNOWN",
+              "description": "Unknown severity",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "LOW",
+              "description": "Low severity",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "MEDIUM",
+              "description": "Medium severity",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "HIGH",
+              "description": "High severity",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "CRITICAL",
+              "description": "Critical severity",
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "possibleTypes": null
+        },
         {
           "kind": "ENUM",
           "name": "IssuableState",
@@ -20075,6 +20130,20 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "severity",
+              "description": "Severity level of the incident",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "ENUM",
+                "name": "IssuableSeverity",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "state",
               "description": "State of the issue",

doc/api/graphql/reference/index.md

@@ -932,6 +932,7 @@ Relationship between an epic and an issue
 | `reference` | String! | Internal reference of the issue. Returned in shortened format by default |
 | `relationPath` | String | URI path of the epic-issue relation |
 | `relativePosition` | Int | Relative position of the issue (used for positioning in epic tree and issue boards) |
+| `severity` | IssuableSeverity | Severity level of the incident |
 | `state` | IssueState! | State of the issue |
 | `statusPagePublishedIncident` | Boolean | Indicates whether an issue is published to the status page |
 | `subscribed` | Boolean! | Indicates the currently logged in user is subscribed to the issue |
@@ -1103,6 +1104,7 @@ Represents a Group Membership
 | `milestone` | Milestone | Milestone of the issue |
 | `reference` | String! | Internal reference of the issue. Returned in shortened format by default |
 | `relativePosition` | Int | Relative position of the issue (used for positioning in epic tree and issue boards) |
+| `severity` | IssuableSeverity | Severity level of the incident |
 | `state` | IssueState! | State of the issue |
 | `statusPagePublishedIncident` | Boolean | Indicates whether an issue is published to the status page |
 | `subscribed` | Boolean! | Indicates the currently logged in user is subscribed to the issue |

spec/graphql/types/issuable_severity_enum_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Types::IssuableSeverityEnum do
+  specify { expect(described_class.graphql_name).to eq('IssuableSeverity') }
+
+  it 'exposes all the existing issuable severity values' do
+    expect(described_class.values.keys).to contain_exactly(
+      *%w[UNKNOWN LOW MEDIUM HIGH CRITICAL]
+    )
+  end
+end

spec/graphql/types/issue_type_spec.rb

@@ -15,7 +15,7 @@ RSpec.describe GitlabSchema.types['Issue'] do
     fields = %i[id iid title description state reference author assignees participants labels milestone due_date
                 confidential discussion_locked upvotes downvotes user_notes_count web_path web_url relative_position
                 subscribed time_estimate total_time_spent closed_at created_at updated_at task_completion_status
-                designs design_collection alert_management_alert]
+                designs design_collection alert_management_alert severity]
 
     fields.each do |field_name|
       expect(described_class).to have_graphql_field(field_name)

spec/lib/gitlab/import_export/all_models.yml

@@ -15,6 +15,7 @@ issues:
 - resource_iteration_events
 - sent_notifications
 - sentry_issue
+- issuable_severity
 - label_links
 - labels
 - last_edited_by
@@ -649,6 +650,8 @@ zoom_meetings:
 - issue
 sentry_issue:
 - issue
+issuable_severity:
+- issue
 design_versions: *version
 epic:
 - subscriptions

spec/models/concerns/issuable_spec.rb

@@ -860,4 +860,41 @@ RSpec.describe Issuable do
       it { is_expected.to eq(incident) }
     end
   end
+
+  describe '#severity' do
+    subject { issuable.severity }
+
+    context 'when issuable is not an incident' do
+      using RSpec::Parameterized::TableSyntax
+
+      where(:issuable_type, :severity) do
+        :issue         | 'unknown'
+        :merge_request | 'unknown'
+      end
+
+      with_them do
+        let(:issuable) { build_stubbed(issuable_type) }
+
+        it { is_expected.to eq(severity) }
+      end
+    end
+
+    context 'when issuable type is an incident' do
+      let!(:issuable) { build_stubbed(:incident) }
+
+      context 'when incident does not have issuable_severity' do
+        it 'returns default serverity' do
+          is_expected.to eq(IssuableSeverity::DEFAULT)
+        end
+      end
+
+      context 'when incident has issuable_severity' do
+        let!(:issuable_severity) { build_stubbed(:issuable_severity, issue: issuable, severity: 'critical') }
+
+        it 'returns issuable serverity' do
+          is_expected.to eq('critical')
+        end
+      end
+    end
+  end
 end