/**
  * Navigate to a particular discussion.
  *
  * @param {number} discussionUserId Discussion Id to load.
  * @param {number} [messageId]      Message to scroll after loading the discussion. Used when searching.
  */
 gotoDiscussion(discussionUserId: number, messageId?: number): void {
     const params = {
         userId: discussionUserId
     };
     if (messageId) {
         params['message'] = messageId;
     }
     this.splitviewCtrl.push('AddonMessagesDiscussionPage', params);
 }

    /**
     * View loaded.
     */
    ionViewDidLoad(): void {
        this.handlers = this.settingsDelegate.getHandlers();
        if (this.selectedPage) {
            this.openHandler(this.selectedPage);
        } else if (this.splitviewCtrl.isOn()) {
            this.openHandler('CoreSettingsGeneralPage');
        }

    }

 /**
  * Open a handler.
  *
  * @param {string} page Page to open.
  * @param {any} params Params of the page to open.
  */
 openHandler(page: string, params?: any): void {
     this.selectedPage = page;
     this.splitviewCtrl.push(page, params);
 }

 this.loadSplitViewObserver = eventsProvider.on(AddonMessagesProvider.SPLIT_VIEW_LOAD_EVENT, (data) => {
     if (data.discussion && (this.splitviewCtrl.isOn() || !data.onlyWithSplitView)) {
         this.gotoDiscussion(data.discussion, data.message);
     }
 }, this.siteId);