upload of modified open file WIP

src/public/app/services/file_watcher.js

@@ -0,0 +1,31 @@
+import ws from "./ws.js";
+import appContext from "./app_context.js";
+
+const fileModificationStatus = {};
+
+function getFileModificationStatus(noteId) {
+    return fileModificationStatus[noteId];
+}
+
+function fileModificationUploaded(noteId) {
+    delete fileModificationStatus[noteId];
+}
+
+ws.subscribeToMessages(async message => {
+    if (message.type !== 'openedFileUpdated') {
+        return;
+    }
+
+    fileModificationStatus[message.noteId] = message;
+
+    appContext.triggerEvent('openedFileUpdated', {
+        noteId: message.noteId,
+        lastModifiedMs: message.lastModifiedMs,
+        filePath: message.filePath
+    });
+});
+
+export default {
+    getFileModificationStatus,
+    fileModificationUploaded
+}