Redirect on success for standalone compose (#35763)

app/javascript/mastodon/actions/compose.js

@@ -183,7 +183,7 @@ export function directCompose(account) {
   };
 }
 
-export function submitCompose() {
+export function submitCompose(successCallback) {
   return function (dispatch, getState) {
     const status   = getState().getIn(['compose', 'text'], '');
     const media    = getState().getIn(['compose', 'media_attachments']);
@@ -239,6 +239,9 @@ export function submitCompose() {
 
       dispatch(insertIntoTagHistory(response.data.tags, status));
       dispatch(submitComposeSuccess({ ...response.data }));
+      if (typeof successCallback === 'function') {
+        successCallback(response.data);
+      }
 
       // To make the app more responsive, immediately push the status
       // into the columns

app/javascript/mastodon/features/compose/components/compose_form.jsx

@@ -73,6 +73,7 @@ class ComposeForm extends ImmutablePureComponent {
     singleColumn: PropTypes.bool,
     lang: PropTypes.string,
     maxChars: PropTypes.number,
+    redirectOnSuccess: PropTypes.bool,
   };
 
   static defaultProps = {
@@ -310,7 +311,7 @@ class ComposeForm extends ImmutablePureComponent {
                 >
                   {intl.formatMessage(
                     this.props.isEditing ?
-                      messages.saveChanges : 
+                      messages.saveChanges :
                       (this.props.isInReply ? messages.reply : messages.publish)
                   )}
                 </Button>

app/javascript/mastodon/features/compose/containers/compose_form_container.js

@@ -34,7 +34,7 @@ const mapStateToProps = state => ({
   maxChars: state.getIn(['server', 'server', 'configuration', 'statuses', 'max_characters'], 500),
 });
 
-const mapDispatchToProps = (dispatch) => ({
+const mapDispatchToProps = (dispatch, props) => ({
 
   onChange (text) {
     dispatch(changeCompose(text));
@@ -47,7 +47,11 @@ const mapDispatchToProps = (dispatch) => ({
         modalProps: {},
       }));
     } else {
-      dispatch(submitCompose());
+      dispatch(submitCompose((status) => {
+        if (props.redirectOnSuccess) {
+          window.location.assign(status.url);
+        }
+      }));
     }
   },
 

app/javascript/mastodon/features/standalone/compose/index.jsx

@@ -5,7 +5,7 @@ import ModalContainer from 'mastodon/features/ui/containers/modal_container';
 
 const Compose = () => (
   <>
-    <ComposeFormContainer autoFocus withoutNavigation />
+    <ComposeFormContainer autoFocus withoutNavigation redirectOnSuccess />
     <AlertsController />
     <ModalContainer />
     <LoadingBarContainer className='loading-bar' />

spec/system/share_entrypoint_spec.rb

@@ -23,7 +23,7 @@ RSpec.describe 'Share page', :js, :streaming do
     fill_in_form
 
     expect(page)
-      .to have_css('.notification-bar-message', text: frontend_translations('compose.published.body'))
+      .to have_current_path(%r{/@bob/[0-9]+})
   end
 
   def fill_in_form