Ghost/ghost/admin/app/routes/offer.js

// import AdminRoute from 'ghost-admin/routes/admin';
// import ConfirmUnsavedChangesModal from '../components/modals/confirm-unsaved-changes';
// import {action} from '@ember/object';
// import {inject as service} from '@ember/service';

// export default class OffersRoute extends AdminRoute {
//     @service modals;
//     @service router;

//     _requiresBackgroundRefresh = true;

//     model(params) {
//         this._requiresBackgroundRefresh = false;

//         if (params.offer_id) {
//             return this.store.queryRecord('offer', {id: params.offer_id});
//         } else {
//             return this.store.createRecord('offer');
//         }
//     }

//     setupController(controller, offer) {
//         super.setupController(...arguments);

//         if (this._requiresBackgroundRefresh) {
//             controller.fetchOfferTask.perform(offer.id);
//         }
//     }

//     deactivate() {
//         // clean up newly created records and revert unsaved changes to existing
//         this.controller.offer.rollbackAttributes();
//         this._requiresBackgroundRefresh = true;
//     }

//     @action
//     async willTransition(transition) {
//         if (this.hasConfirmed) {
//             return true;
//         }

//         transition.abort();

//         // wait for any existing confirm modal to be closed before allowing transition
//         if (this.confirmModal) {
//             return;
//         }

//         const shouldLeave = await this.confirmUnsavedChanges();

//         if (shouldLeave) {
//             this.controller.model.rollbackAttributes();
//             this.hasConfirmed = true;
//             return transition.retry();
//         }
//     }

//     async confirmUnsavedChanges() {
//         if (this.controller.model?.hasDirtyAttributes) {
//             this.confirmModal = this.modals
//                 .open(ConfirmUnsavedChangesModal)
//                 .finally(() => {
//                     this.confirmModal = null;
//                 });

//             return this.confirmModal;
//         }

//         return true;
//     }

//     @action
//     save() {
//         this.controller.save();
//     }

//     titleToken() {
//         return this.controller.offer.name;
//     }
// }