src/conversation.js

   1
   2 export default class {
   3   constructor(jid, backlog) {
   4     this.jid = jid;
   5     this.backlog = backlog;
   6     this.changeHandlers = [];
   7   }
   8
   9   addChangeHandler(handler) {
  10     this.changeHandlers.push(handler);
  11   }
  12
  13   removeChangeHandler(handler) {
  14     this.changeHandlers = this.changeHandlers.filter(
  15       (h) => h !== handler
  16     )
  17   }
  18
  19   received(message) {
  20     this.backlog.push(message);
  21     this.changed();
  22   }
  23
  24   sent(message) {
  25     this.backlog.push(message);
  26     this.changed();
  27   }
  28
  29   changed() {
  30     this.changeHandlers.forEach((handler) => handler());
  31   }
  32 }