Show correct warning on issue when project is archived

When viewing an issue in an archived project show
corresponding warning message.

app/assets/javascripts/notes/components/discussion_locked_widget.vue

@@ -12,6 +12,9 @@ export default {
   },
   mixins: [Issuable, issuableStateMixin],
   computed: {
+    projectArchivedWarning() {
+      return __('This project is archived and cannot be commented on.');
+    },
     lockedIssueWarning() {
       return sprintf(
         __('This %{issuableDisplayName} is locked. Only project members can comment.'),
@@ -26,9 +29,15 @@ export default {
   <div class="disabled-comment text-center">
     <span class="issuable-note-warning inline">
       <icon :size="16" name="lock" class="icon" />
-      <span>
-        {{ lockedIssueWarning }}
+      <span v-if="isProjectArchived">
+        {{ projectArchivedWarning }}
+        <gl-link :href="archivedProjectDocsPath" target="_blank" class="learn-more">
+          {{ __('Learn more') }}
+        </gl-link>
+      </span>
 
+      <span v-else>
+        {{ lockedIssueWarning }}
         <gl-link :href="lockedIssueDocsPath" target="_blank" class="learn-more">
           {{ __('Learn more') }}
         </gl-link>

app/assets/javascripts/notes/mixins/issuable_state.js

@@ -3,6 +3,12 @@ import { mapGetters } from 'vuex';
 export default {
   computed: {
     ...mapGetters(['getNoteableDataByProp']),
+    isProjectArchived() {
+      return this.getNoteableDataByProp('is_project_archived');
+    },
+    archivedProjectDocsPath() {
+      return this.getNoteableDataByProp('archived_project_docs_path');
+    },
     lockedIssueDocsPath() {
       return this.getNoteableDataByProp('locked_discussion_docs_path');
     },

app/serializers/issue_entity.rb

@@ -64,4 +64,12 @@ class IssueEntity < IssuableEntity
   expose :locked_discussion_docs_path, if: -> (issue) { issue.discussion_locked? } do |issue|
     help_page_path('user/discussions/index.md', anchor: 'lock-discussions')
   end
+
+  expose :is_project_archived do |issue|
+    issue.project.archived?
+  end
+
+  expose :archived_project_docs_path, if: -> (issue) { issue.project.archived? } do |issue|
+    help_page_path('user/project/settings/index.md', anchor: 'archiving-a-project')
+  end
 end

app/serializers/merge_request_noteable_entity.rb

@@ -42,6 +42,18 @@ class MergeRequestNoteableEntity < IssuableEntity
     end
   end
 
+  expose :locked_discussion_docs_path, if: -> (merge_request) { merge_request.discussion_locked? } do |merge_request|
+    help_page_path('user/discussions/index.md', anchor: 'lock-discussions')
+  end
+
+  expose :is_project_archived do |merge_request|
+    merge_request.project.archived?
+  end
+
+  expose :archived_project_docs_path, if: -> (merge_request) { merge_request.project.archived? } do |merge_request|
+    help_page_path('user/project/settings/index.md', anchor: 'archiving-a-project')
+  end
+
   private
 
   delegate :current_user, to: :request

changelogs/unreleased/24190-archived-project-warning-message.yml

+---
+title: Show correct warning on issue when project is archived
+merge_request: 20078
+author:
+type: fixed

locale/gitlab.pot

@@ -18256,6 +18256,9 @@ msgstr ""
 msgid "This project does not have billing enabled. To create a cluster, <a href=%{linkToBilling} target=\"_blank\" rel=\"noopener noreferrer\">enable billing <i class=\"fa fa-external-link\" aria-hidden=\"true\"></i></a> and try again."
 msgstr ""
 
+msgid "This project is archived and cannot be commented on."
+msgstr ""
+
 msgid "This project path either does not exist or is private."
 msgstr ""
 

spec/fixtures/api/schemas/entities/merge_request_noteable.json

 {
   "type": "object",
-  "properties" : {
+  "required": ["id", "iid", "title", "description", "merge_params", "state", "source_branch", "target_branch",
+    "diff_head_sha", "create_note_path", "preview_note_path", "can_receive_suggestion", "create_issue_to_resolve_discussions_path",
+    "new_blob_path", "current_user", "is_project_archived"],
+  "properties": {
     "id": { "type": "integer" },
     "iid": { "type": "integer" },
     "title": { "type": "string" },
@@ -26,7 +29,10 @@
         "can_update": { "type": "boolean" }
       },
       "additionalProperties": false
-    }
+    },
+    "is_project_archived": { "type":  "boolean" },
+    "locked_discussion_docs_path": { "type":  "string" },
+    "archived_project_docs_path": { "type":  "string" }
   },
   "additionalProperties": false
 }

spec/serializers/issue_entity_spec.rb

@@ -92,4 +92,36 @@ describe IssueEntity do
       end
     end
   end
+
+  context 'when issuable in active or archived project' do
+    before do
+      project.add_developer(user)
+    end
+
+    context 'when project is active' do
+      it 'returns archived false' do
+        expect(subject[:is_project_archived]).to eq(false)
+      end
+
+      it 'returns nil for archived project doc' do
+        response = described_class.new(resource, request: request).as_json
+
+        expect(response[:archived_project_docs_path]).to be nil
+      end
+    end
+
+    context 'when project is archived' do
+      before do
+        project.update(archived: true)
+      end
+
+      it 'returns archived true' do
+        expect(subject[:is_project_archived]).to eq(true)
+      end
+
+      it 'returns archived project doc' do
+        expect(subject[:archived_project_docs_path]).to eq('/help/user/project/settings/index.md#archiving-a-project')
+      end
+    end
+  end
 end

spec/serializers/merge_request_serializer_spec.rb

@@ -48,7 +48,24 @@ describe MergeRequestSerializer do
     let(:serializer) { 'noteable' }
 
     it 'matches noteable merge request json schema' do
-      expect(json_entity).to match_schema('entities/merge_request_noteable', strict: true)
+      expect(json_entity).to match_schema('entities/merge_request_noteable')
+    end
+
+    context 'when merge_request is locked' do
+      let(:resource) { create(:merge_request, :locked, description: "Description") }
+
+      it 'matches noteable merge request json schema' do
+        expect(json_entity).to match_schema('entities/merge_request_noteable')
+      end
+    end
+
+    context 'when project is archived' do
+      let(:project) { create(:project, :archived, :repository) }
+      let(:resource) { create(:merge_request, source_project: project, target_project: project, description: "Description") }
+
+      it 'matches noteable merge request json schema' do
+        expect(json_entity).to match_schema('entities/merge_request_noteable')
+      end
     end
   end