@jsxc/jsxc/src/connection/services/PEP.ts

Real-time XMPP chat application with video calls, file transfer and encrypted communication

import AbstractService from './AbstractService';
import { $iq } from '../../vendor/Strophe';

export default class PEP extends AbstractService {
   public subscribe(node: string, handler: (stanza: string) => boolean, force: boolean = false) {
      this.account.getDiscoInfo().addFeature(node);
      this.account.getDiscoInfo().addFeature(`${node}+notify`);

      this.connection.registerHandler(handler, 'http://jabber.org/protocol/pubsub#event', 'message', null, null, null);

      if (force) {
         return this.connection.sendPresence();
      }
   }

   public unsubscribe(node: string, force: boolean = false) {
      this.account.getDiscoInfo().removeFeature(node);
      this.account.getDiscoInfo().removeFeature(`${node}+notify`);

      if (force) {
         return this.connection.sendPresence();
      }
   }

   public publish(node: string, element: Element, id?: string): Promise<Element> {
      let iqStanza = $iq({
         type: 'set',
      })
         .c('pubsub', {
            xmlns: 'http://jabber.org/protocol/pubsub',
         })
         .c('publish', {
            node,
         })
         .c('item', {
            id,
         })
         .cnode(element);

      return this.sendIQ(iqStanza);
   }

   public delete(node: string): Promise<Element> {
      let iqStanza = $iq({
         type: 'set',
      })
         .c('pubsub', {
            xmlns: 'http://jabber.org/protocol/pubsub#owner',
         })
         .c('delete', {
            node,
         });

      return this.sendIQ(iqStanza);
   }

   public retrieveItems(node: string, jid?: string, id?: string) {
      let iq = $iq({
         to: jid,
         type: 'get',
      });

      iq.c('pubsub', {
         xmlns: 'http://jabber.org/protocol/pubsub',
      });
      iq.c('items', {
         node,
      });

      if (id) {
         iq.c('item', {
            id,
         });
      }

      return this.sendIQ(iq);
   }
}