Add special alert for throttled requests (#11677)

* Add special alert for throttled requests

* Use an extra attribute instead of an array

app/javascript/mastodon/actions/alerts.js

@@ -3,6 +3,8 @@ import { defineMessages } from 'react-intl';
 const messages = defineMessages({
   unexpectedTitle: { id: 'alert.unexpected.title', defaultMessage: 'Oops!' },
   unexpectedMessage: { id: 'alert.unexpected.message', defaultMessage: 'An unexpected error occurred.' },
+  rateLimitedTitle: { id: 'alert.rate_limited.title', defaultMessage: 'Rate limited' },
+  rateLimitedMessage: { id: 'alert.rate_limited.message', defaultMessage: 'Please retry after {retry_time, time, medium}.' },
 });
 
 export const ALERT_SHOW    = 'ALERT_SHOW';
@@ -23,23 +25,29 @@ export function clearAlert() {
   };
 };
 
-export function showAlert(title = messages.unexpectedTitle, message = messages.unexpectedMessage) {
+export function showAlert(title = messages.unexpectedTitle, message = messages.unexpectedMessage, message_values = undefined) {
   return {
     type: ALERT_SHOW,
     title,
     message,
+    message_values,
   };
 };
 
 export function showAlertForError(error) {
   if (error.response) {
-    const { data, status, statusText } = error.response;
+    const { data, status, statusText, headers } = error.response;
 
     if (status === 404 || status === 410) {
       // Skip these errors as they are reflected in the UI
       return { type: ALERT_NOOP };
     }
 
+    if (status === 429 && headers['x-ratelimit-reset']) {
+      const reset_date = new Date(headers['x-ratelimit-reset']);
+      return showAlert(messages.rateLimitedTitle, messages.rateLimitedMessage, { 'retry_time': reset_date });
+    }
+
     let message = statusText;
     let title   = `${status}`;
 

app/javascript/mastodon/features/ui/containers/notifications_container.js

@@ -11,7 +11,7 @@ const mapStateToProps = (state, { intl }) => {
     const value = notification[key];
 
     if (typeof value === 'object') {
-      notification[key] = intl.formatMessage(value);
+      notification[key] = intl.formatMessage(value, notification[`${key}_values`]);
     }
   }));
 

app/javascript/mastodon/reducers/alerts.js

@@ -14,6 +14,7 @@ export default function alerts(state = initialState, action) {
       key: state.size > 0 ? state.last().get('key') + 1 : 0,
       title: action.title,
       message: action.message,
+      message_values: action.message_values,
     }));
   case ALERT_DISMISS:
     return state.filterNot(item => item.get('key') === action.alert.key);

app/javascript/mastodon/selectors/index.js

@@ -128,6 +128,7 @@ export const getAlerts = createSelector([getAlertsBase], (base) => {
   base.forEach(item => {
     arr.push({
       message: item.get('message'),
+      message_values: item.get('message_values'),
       title: item.get('title'),
       key: item.get('key'),
       dismissAfter: 5000,