discourse/app/assets/javascripts/discourse/controllers/upload-selector.js.es6

import ModalFunctionality from 'discourse/mixins/modal-functionality';
import { default as computed, observes } from 'ember-addons/ember-computed-decorators';
import { allowsAttachments, authorizesAllExtensions, authorizedExtensions } from 'discourse/lib/utilities';

function uploadTranslate(key) {
  if (allowsAttachments()) { key += "_with_attachments"; }
  return `upload_selector.${key}`;
}

export default Ember.Controller.extend(ModalFunctionality, {
  showMore: false,
  imageUrl: null,
  imageLink: null,
  local: Ember.computed.equal('selection', 'local'),
  remote: Ember.computed.equal('selection', 'remote'),
  selection: 'local',

  @computed()
  uploadIcon: () => allowsAttachments() ? "upload" : "picture-o",

  @computed()
  title: () => uploadTranslate("title"),

  @computed('selection')
  tip(selection) {
    const authorized_extensions = authorizesAllExtensions() ? "" : `(${authorizedExtensions()})`;
    return I18n.t(uploadTranslate(`${selection}_tip`), { authorized_extensions });
  },

  @observes('selection')
  _selectionChanged() {
    if (this.get('local')) {
      this.set('showMore', false);
    }
  },

  actions: {
    upload() {
      if (this.get('local')) {
        $('.wmd-controls').fileupload('add', { fileInput: $('#filename-input') });
      } else {
        const imageUrl = this.get('imageUrl') || '';
        const imageLink = this.get('imageLink') || '';
        const toolbarEvent = this.get('toolbarEvent');

        if (this.get('showMore') && imageLink.length > 3) {
          toolbarEvent.addText(`[![](${imageUrl})](${imageLink})`);
        } else {
          toolbarEvent.addText(imageUrl);
        }
      }
      this.send('closeModal');
    },

    toggleShowMore() {
      this.toggleProperty("showMore");
    }
  }

});