[Glitch] Add confirmation modal when closing media edit modal with unsaved changes

Port a8a7066e97 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/actions/compose.js

@@ -10,6 +10,7 @@ import { importFetchedAccounts } from './importer';
 import { updateTimeline } from './timelines';
 import { showAlertForError } from './alerts';
 import { showAlert } from './alerts';
+import { openModal } from './modal';
 import { defineMessages } from 'react-intl';
 
 let cancelFetchComposeSuggestionsAccounts, cancelFetchComposeSuggestionsTags;
@@ -68,6 +69,11 @@ export const COMPOSE_POLL_OPTION_CHANGE   = 'COMPOSE_POLL_OPTION_CHANGE';
 export const COMPOSE_POLL_OPTION_REMOVE   = 'COMPOSE_POLL_OPTION_REMOVE';
 export const COMPOSE_POLL_SETTINGS_CHANGE = 'COMPOSE_POLL_SETTINGS_CHANGE';
 
+export const INIT_MEDIA_EDIT_MODAL = 'INIT_MEDIA_EDIT_MODAL';
+
+export const COMPOSE_CHANGE_MEDIA_DESCRIPTION = 'COMPOSE_CHANGE_MEDIA_DESCRIPTION';
+export const COMPOSE_CHANGE_MEDIA_FOCUS       = 'COMPOSE_CHANGE_MEDIA_FOCUS';
+
 const messages = defineMessages({
   uploadErrorLimit: { id: 'upload_error.limit', defaultMessage: 'File upload limit exceeded.' },
   uploadErrorPoll:  { id: 'upload_error.poll', defaultMessage: 'File upload not allowed with polls.' },
@@ -339,6 +345,32 @@ export const uploadThumbnailFail = error => ({
   skipLoading: true,
 });
 
+export function initMediaEditModal(id) {
+  return dispatch => {
+    dispatch({
+      type: INIT_MEDIA_EDIT_MODAL,
+      id,
+    });
+
+    dispatch(openModal('FOCAL_POINT', { id }));
+  };
+};
+
+export function onChangeMediaDescription(description) {
+  return {
+    type: COMPOSE_CHANGE_MEDIA_DESCRIPTION,
+    description,
+  };
+};
+
+export function onChangeMediaFocus(focusX, focusY) {
+  return {
+    type: COMPOSE_CHANGE_MEDIA_FOCUS,
+    focusX,
+    focusY,
+  };
+};
+
 export function changeUploadCompose(id, params) {
   return (dispatch, getState) => {
     dispatch(changeUploadComposeRequest());