Add notification graphql fields to issue type

Add "emailsDiabled" field that indicates whether the project
associated with an issue has emails notifications enabled or not.

Add "subscribeDisabledDescription" field that contains the message
to display when the project associated with an issue has
emails notifications disabled.

app/graphql/types/issue_type.rb

@@ -73,6 +73,10 @@ module Types
 
     field :participants, Types::UserType.connection_type, null: true, complexity: 5,
           description: 'List of participants in the issue'
+    field :emails_disabled, GraphQL::BOOLEAN_TYPE, method: :project_emails_disabled?, null: false, complexity: 5,
+          description: 'Indicates if a project has email notifications disabled'
+    field :subscribe_disabled_description, GraphQL::STRING_TYPE, method: :subscribe_disabled_description, null: false,
+          description: 'The message to display when a project has emails notifications disabled'
     field :subscribed, GraphQL::BOOLEAN_TYPE, method: :subscribed?, null: false, complexity: 5,
           description: 'Indicates the currently logged in user is subscribed to the issue'
     field :time_estimate, GraphQL::INT_TYPE, null: false,

app/presenters/issue_presenter.rb

 # frozen_string_literal: true
 
 class IssuePresenter < Gitlab::View::Presenter::Delegated
+  include NotificationsHelper
+
   presents :issue
 
   def issue_path
@@ -10,6 +12,14 @@ class IssuePresenter < Gitlab::View::Presenter::Delegated
   def subscribed?
     issue.subscribed?(current_user, issue.project)
   end
+
+  def project_emails_disabled?
+    issue.project.emails_disabled?
+  end
+
+  def subscribe_disabled_description
+    notification_description(:owner_disabled)
+  end
 end
 
 IssuePresenter.prepend_if_ee('EE::IssuePresenter')

changelogs/unreleased/add-emails-disabled-field-to-project-type.yml

+---
+title: Add emailsDisabled and subscribeDisabledescription fields for issue type
+merge_request: 46947
+author:
+type: changed

doc/api/graphql/reference/gitlab_schema.graphql

@@ -7360,6 +7360,11 @@ type EpicIssue implements CurrentUserTodos & Noteable {
   """
   dueDate: Time
 
+  """
+  Indicates if a project has email notifications disabled
+  """
+  emailsDisabled: Boolean!
+
   """
   Epic to which this issue belongs
   """
@@ -7520,6 +7525,11 @@ type EpicIssue implements CurrentUserTodos & Noteable {
   """
   statusPagePublishedIncident: Boolean
 
+  """
+  The message to display when a project has emails notifications disabled
+  """
+  subscribeDisabledDescription: String!
+
   """
   Indicates the currently logged in user is subscribed to the issue
   """
@@ -9879,6 +9889,11 @@ type Issue implements CurrentUserTodos & Noteable {
   """
   dueDate: Time
 
+  """
+  Indicates if a project has email notifications disabled
+  """
+  emailsDisabled: Boolean!
+
   """
   Epic to which this issue belongs
   """
@@ -10029,6 +10044,11 @@ type Issue implements CurrentUserTodos & Noteable {
   """
   statusPagePublishedIncident: Boolean
 
+  """
+  The message to display when a project has emails notifications disabled
+  """
+  subscribeDisabledDescription: String!
+
   """
   Indicates the currently logged in user is subscribed to the issue
   """

doc/api/graphql/reference/gitlab_schema.json

@@ -20316,6 +20316,24 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "emailsDisabled",
+              "description": "Indicates if a project has email notifications disabled",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "Boolean",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "epic",
               "description": "Epic to which this issue belongs",
@@ -20728,6 +20746,24 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "subscribeDisabledDescription",
+              "description": "The message to display when a project has emails notifications disabled",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "subscribed",
               "description": "Indicates the currently logged in user is subscribed to the issue",
@@ -26955,6 +26991,24 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "emailsDisabled",
+              "description": "Indicates if a project has email notifications disabled",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "Boolean",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "epic",
               "description": "Epic to which this issue belongs",
@@ -27339,6 +27393,24 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "subscribeDisabledDescription",
+              "description": "The message to display when a project has emails notifications disabled",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "subscribed",
               "description": "Indicates the currently logged in user is subscribed to the issue",

doc/api/graphql/reference/index.md

@@ -1214,6 +1214,7 @@ Relationship between an epic and an issue.
 | `discussions` | DiscussionConnection! | All discussions on this noteable |
 | `downvotes` | Int! | Number of downvotes the issue has received |
 | `dueDate` | Time | Due date of the issue |
+| `emailsDisabled` | Boolean! | Indicates if a project has email notifications disabled |
 | `epic` | Epic | Epic to which this issue belongs |
 | `epicIssueId` | ID! | ID of the epic-issue relation |
 | `healthStatus` | HealthStatus | Current health status. Returns null if `save_issuable_health_status` feature flag is disabled. |
@@ -1233,6 +1234,7 @@ Relationship between an epic and an issue.
 | `slaDueAt` | Time | Timestamp of when the issue SLA expires. |
 | `state` | IssueState! | State of the issue |
 | `statusPagePublishedIncident` | Boolean | Indicates whether an issue is published to the status page |
+| `subscribeDisabledDescription` | String! | The message to display when a project has emails notifications disabled |
 | `subscribed` | Boolean! | Indicates the currently logged in user is subscribed to the issue |
 | `taskCompletionStatus` | TaskCompletionStatus! | Task completion status of the issue |
 | `timeEstimate` | Int! | Time estimate of the issue |
@@ -1480,6 +1482,7 @@ Represents a recorded measurement (object count) for the Admins.
 | `discussions` | DiscussionConnection! | All discussions on this noteable |
 | `downvotes` | Int! | Number of downvotes the issue has received |
 | `dueDate` | Time | Due date of the issue |
+| `emailsDisabled` | Boolean! | Indicates if a project has email notifications disabled |
 | `epic` | Epic | Epic to which this issue belongs |
 | `healthStatus` | HealthStatus | Current health status. Returns null if `save_issuable_health_status` feature flag is disabled. |
 | `humanTimeEstimate` | String | Human-readable time estimate of the issue |
@@ -1497,6 +1500,7 @@ Represents a recorded measurement (object count) for the Admins.
 | `slaDueAt` | Time | Timestamp of when the issue SLA expires. |
 | `state` | IssueState! | State of the issue |
 | `statusPagePublishedIncident` | Boolean | Indicates whether an issue is published to the status page |
+| `subscribeDisabledDescription` | String! | The message to display when a project has emails notifications disabled |
 | `subscribed` | Boolean! | Indicates the currently logged in user is subscribed to the issue |
 | `taskCompletionStatus` | TaskCompletionStatus! | Task completion status of the issue |
 | `timeEstimate` | Int! | Time estimate of the issue |

spec/graphql/types/issue_type_spec.rb

@@ -16,7 +16,7 @@ RSpec.describe GitlabSchema.types['Issue'] do
   it 'has specific fields' do
     fields = %i[id iid title description state reference author assignees updated_by participants labels milestone due_date
                 confidential discussion_locked upvotes downvotes user_notes_count user_discussions_count web_path web_url relative_position
-                subscribed time_estimate total_time_spent human_time_estimate human_total_time_spent closed_at created_at updated_at task_completion_status
+                emails_disabled subscribe_disabled_description subscribed time_estimate total_time_spent human_time_estimate human_total_time_spent closed_at created_at updated_at task_completion_status
                 designs design_collection alert_management_alert severity current_user_todos]
 
     fields.each do |field_name|

spec/presenters/issue_presenter_spec.rb

@@ -35,6 +35,31 @@ RSpec.describe IssuePresenter do
     end
   end
 
+  describe '#project_emails_disabled' do
+    subject { presenter.project_emails_disabled? }
+
+    it 'returns false when emails notifications is enabled for project' do
+      is_expected.to be(false)
+    end
+
+    context 'when emails notifications is disabled for project' do
+      before do
+        allow(project).to receive(:emails_disabled?).and_return(true)
+      end
+
+      it 'returns true' do
+        is_expected.to be(true)
+      end
+    end
+  end
+
+  describe '#subscribe_disabled_description' do
+    subject { presenter.subscribe_disabled_description }
+
+    it 'returns correct message' do
+      is_expected.to equal('Notifications have been disabled by the project or group owner')
+    end
+  end
   describe '#issue_path' do
     it 'returns correct path' do
       expect(presenter.issue_path).to eq("/#{group.name}/#{project.name}/-/issues/#{issue.iid}")