ghost/core/client/controllers/modals/delete-post.js

var DeletePostController = Ember.Controller.extend({
    needs: 'posts/post',
    actions: {
        confirmAccept: function () {
            var self = this;

            this.get('model').destroyRecord().then(function () {
                self.notifications.showSuccess('Your post has been deleted.');
                self.transitionToRoute('posts.index');
            }, function () {
                self.notifications.showError('Your post could not be deleted. Please try again.');
            });

        },

        confirmReject: function () {
            return false;
        }
    },
    confirm: {
        accept: {
            text: 'Delete',
            buttonClass: 'button-delete'
        },
        reject: {
            text: 'Cancel',
            buttonClass: 'button'
        }
    }
});

export default DeletePostController;