discourse-custom-wizard/assets/javascripts/discourse/controllers/admin-wizards-submissions-show.js.es6

import Controller from "@ember/controller";
import { fmt } from "discourse/lib/computed";
import { empty } from '@ember/object/computed';
import CustomWizard from "../models/custom-wizard";

export default Controller.extend({
  downloadUrl: fmt("wizard.id", "/admin/wizards/submissions/%@/download"),
  noResults: empty('submissions'),
  page: 0,
  total: 0,

  loadMoreSubmissions() {
    const page = this.get('page');
    const wizardId = this.get('wizard.id');

    this.set('loadingMore', true);
    CustomWizard.submissions(wizardId, page).then(result => {
      if (result.submissions) {
        this.get('submissions').pushObjects(result.submissions);
      }
    }).finally(() => {
      this.set('loadingMore', false);
    });
  },

  actions: {
    loadMore() {
      if (!this.loadingMore && (this.submissions.length < this.total)) {
        this.set('page', this.get('page') + 1);
        this.loadMoreSubmissions();
      }
    }
  }
});