Resolve "GraphQL: Mutation for changing locked status of an issue"

app/graphql/mutations/issues/set_locked.rb

+# frozen_string_literal: true
+
+module Mutations
+  module Issues
+    class SetLocked < Base
+      graphql_name 'IssueSetLocked'
+
+      argument :locked,
+               GraphQL::BOOLEAN_TYPE,
+               required: true,
+               description: 'Whether or not to lock discussion on the issue'
+
+      def resolve(project_path:, iid:, locked:)
+        issue = authorized_find!(project_path: project_path, iid: iid)
+
+        ::Issues::UpdateService.new(issue.project, current_user, discussion_locked: locked)
+          .execute(issue)
+
+        {
+          issue: issue,
+          errors: errors_on_object(issue)
+        }
+      end
+    end
+  end
+end

app/graphql/types/mutation_type.rb

@@ -17,6 +17,7 @@ module Types
     mount_mutation Mutations::Commits::Create, calls_gitaly: true
     mount_mutation Mutations::Discussions::ToggleResolve
     mount_mutation Mutations::Issues::SetConfidential
+    mount_mutation Mutations::Issues::SetLocked
     mount_mutation Mutations::Issues::SetDueDate
     mount_mutation Mutations::Issues::Update
     mount_mutation Mutations::MergeRequests::Create

changelogs/unreleased/36319-graphql-mutation-for-changing-locked-status-of-an-issue.yml

+---
+title: 'GraphQL mutation for changing locked status of an issue'
+merge_request: 36866
+author:
+type: added

doc/api/graphql/reference/gitlab_schema.graphql

@@ -6178,6 +6178,51 @@ type IssueSetIterationPayload {
   issue: Issue
 }
 
+"""
+Autogenerated input type of IssueSetLocked
+"""
+input IssueSetLockedInput {
+  """
+  A unique identifier for the client performing the mutation.
+  """
+  clientMutationId: String
+
+  """
+  The iid of the issue to mutate
+  """
+  iid: String!
+
+  """
+  Whether or not to lock discussion on the issue
+  """
+  locked: Boolean!
+
+  """
+  The project the issue to mutate is in
+  """
+  projectPath: ID!
+}
+
+"""
+Autogenerated return type of IssueSetLocked
+"""
+type IssueSetLockedPayload {
+  """
+  A unique identifier for the client performing the mutation.
+  """
+  clientMutationId: String
+
+  """
+  Errors encountered during execution of the mutation.
+  """
+  errors: [String!]!
+
+  """
+  The issue after mutation
+  """
+  issue: Issue
+}
+
 """
 Autogenerated input type of IssueSetWeight
 """
@@ -8087,6 +8132,7 @@ type Mutation {
   issueSetConfidential(input: IssueSetConfidentialInput!): IssueSetConfidentialPayload
   issueSetDueDate(input: IssueSetDueDateInput!): IssueSetDueDatePayload
   issueSetIteration(input: IssueSetIterationInput!): IssueSetIterationPayload
+  issueSetLocked(input: IssueSetLockedInput!): IssueSetLockedPayload
   issueSetWeight(input: IssueSetWeightInput!): IssueSetWeightPayload
   jiraImportStart(input: JiraImportStartInput!): JiraImportStartPayload
   jiraImportUsers(input: JiraImportUsersInput!): JiraImportUsersPayload

doc/api/graphql/reference/gitlab_schema.json

@@ -17078,6 +17078,136 @@
           "enumValues": null,
           "possibleTypes": null
         },
+        {
+          "kind": "INPUT_OBJECT",
+          "name": "IssueSetLockedInput",
+          "description": "Autogenerated input type of IssueSetLocked",
+          "fields": null,
+          "inputFields": [
+            {
+              "name": "projectPath",
+              "description": "The project the issue to mutate is in",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "ID",
+                  "ofType": null
+                }
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "iid",
+              "description": "The iid of the issue to mutate",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                }
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "locked",
+              "description": "Whether or not to lock discussion on the issue",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "Boolean",
+                  "ofType": null
+                }
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "clientMutationId",
+              "description": "A unique identifier for the client performing the mutation.",
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "defaultValue": null
+            }
+          ],
+          "interfaces": null,
+          "enumValues": null,
+          "possibleTypes": null
+        },
+        {
+          "kind": "OBJECT",
+          "name": "IssueSetLockedPayload",
+          "description": "Autogenerated return type of IssueSetLocked",
+          "fields": [
+            {
+              "name": "clientMutationId",
+              "description": "A unique identifier for the client performing the mutation.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "errors",
+              "description": "Errors encountered during execution of the mutation.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "LIST",
+                  "name": null,
+                  "ofType": {
+                    "kind": "NON_NULL",
+                    "name": null,
+                    "ofType": {
+                      "kind": "SCALAR",
+                      "name": "String",
+                      "ofType": null
+                    }
+                  }
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "issue",
+              "description": "The issue after mutation",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "Issue",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "inputFields": null,
+          "interfaces": [
+
+          ],
+          "enumValues": null,
+          "possibleTypes": null
+        },
         {
           "kind": "INPUT_OBJECT",
           "name": "IssueSetWeightInput",
@@ -23457,6 +23587,33 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "issueSetLocked",
+              "description": null,
+              "args": [
+                {
+                  "name": "input",
+                  "description": null,
+                  "type": {
+                    "kind": "NON_NULL",
+                    "name": null,
+                    "ofType": {
+                      "kind": "INPUT_OBJECT",
+                      "name": "IssueSetLockedInput",
+                      "ofType": null
+                    }
+                  },
+                  "defaultValue": null
+                }
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "IssueSetLockedPayload",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "issueSetWeight",
               "description": null,

doc/api/graphql/reference/index.md

@@ -928,6 +928,16 @@ Autogenerated return type of IssueSetIteration
 | `errors` | String! => Array | Errors encountered during execution of the mutation. |
 | `issue` | Issue | The issue after mutation |
 
+## IssueSetLockedPayload
+
+Autogenerated return type of IssueSetLocked
+
+| Name  | Type  | Description |
+| ---   |  ---- | ----------  |
+| `clientMutationId` | String | A unique identifier for the client performing the mutation. |
+| `errors` | String! => Array | Errors encountered during execution of the mutation. |
+| `issue` | Issue | The issue after mutation |
+
 ## IssueSetWeightPayload
 
 Autogenerated return type of IssueSetWeight

spec/graphql/mutations/issues/set_locked_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::Issues::SetLocked do
+  let_it_be(:issue) { create(:issue) }
+  let_it_be(:user) { create(:user) }
+
+  subject(:mutation) { described_class.new(object: nil, context: { current_user: user }, field: nil) }
+
+  specify { expect(described_class).to require_graphql_authorizations(:update_issue) }
+
+  describe '#resolve' do
+    let(:locked) { true }
+
+    subject { mutation.resolve(project_path: issue.project.full_path, iid: issue.iid, locked: locked) }
+
+    it 'raises an error if the resource is not accessible to the user' do
+      expect { subject }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
+    end
+
+    context 'when the user can update the issue' do
+      let(:mutated_issue) { subject[:issue] }
+
+      before do
+        issue.project.add_developer(user)
+      end
+
+      it 'returns the issue as discussion locked' do
+        expect(mutated_issue).to eq(issue)
+        expect(mutated_issue).to be_discussion_locked
+        expect(subject[:errors]).to be_empty
+      end
+
+      context 'when passing locked as false' do
+        let(:locked) { false }
+
+        it 'unlocks the discussion' do
+          issue.update!(discussion_locked: true)
+
+          expect(mutated_issue).not_to be_discussion_locked
+        end
+      end
+    end
+  end
+end

spec/requests/api/graphql/mutations/issues/set_locked_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Setting an issue as locked' do
+  include GraphqlHelpers
+
+  let_it_be(:current_user) { create(:user) }
+  let_it_be(:issue) { create(:issue) }
+  let_it_be(:project) { issue.project }
+  let(:input) { { locked: true } }
+
+  let(:mutation) do
+    variables = {
+      project_path: project.full_path,
+      iid: issue.iid.to_s
+    }
+    graphql_mutation(:issue_set_locked, variables.merge(input),
+                     <<-QL.strip_heredoc
+                       clientMutationId
+                       errors
+                       issue {
+                         iid
+                         discussionLocked
+                       }
+                     QL
+    )
+  end
+
+  def mutation_response
+    graphql_mutation_response(:issue_set_locked)
+  end
+
+  context 'when the user is not allowed to update the issue' do
+    it 'returns an error' do
+      error = "The resource that you are attempting to access does not exist or you don't have permission to perform this action"
+      post_graphql_mutation(mutation, current_user: current_user)
+
+      expect(graphql_errors).to include(a_hash_including('message' => error))
+    end
+  end
+
+  context 'when user is allowed to update the issue' do
+    before do
+      project.add_developer(current_user)
+    end
+
+    it 'updates the issue locked status' do
+      post_graphql_mutation(mutation, current_user: current_user)
+
+      expect(response).to have_gitlab_http_status(:success)
+      expect(mutation_response['issue']['discussionLocked']).to be_truthy
+    end
+  end
+end