$(document).on('turbolinks:load', function () { if (window.location.pathname.includes('/implement')) { function generateUUID() { // We decided to use this function instead of crypto.randomUUID() because it also supports older browser versions // https://caniuse.com/?search=createObjectURL return URL.createObjectURL(new Blob()).slice(-36) } function is_other_user(user) { return !_.isEqual(current_user, user); } function is_other_session(other_session_id) { return session_id !== other_session_id; } const editor = $('#editor'); const exercise_id = editor.data('exercise-id'); const current_contributor_id = editor.data('contributor-id'); const session_id = generateUUID(); if ($.isController('exercises') && current_user.id !== current_contributor_id) { App.synchronized_editor = App.cable.subscriptions.create({ channel: "SynchronizedEditorChannel", exercise_id: exercise_id }, { connected() { // Called when the subscription is ready for use on the server }, disconnected() { // Called when the subscription has been terminated by the server }, received(data) { // Called when there's incoming data on the websocket for this channel switch (data.action) { case 'editor_change': if (is_other_session(data.session_id)) { CodeOceanEditor.applyChanges(data.delta, data.active_file); } break; case 'connection_change': if (is_other_user(data.user)) { CodeOceanEditor.showPartnersConnectionStatus(data.status, data.user.displayname); this.perform('connection_status'); } break; case 'connection_status': if (is_other_user(data.user)) { CodeOceanEditor.showPartnersConnectionStatus(data.status, data.user.displayname); } break; } }, editor_change(delta, active_file) { const message = {session_id: session_id, active_file: active_file, delta: delta.data} this.perform('editor_change', message); }, is_connected() { return App.cable.subscriptions.findAll(App.synchronized_editor.identifier).length > 0 }, disconnect() { if (this.is_connected()) { this.unsubscribe(); } } }); } } });