query-viewer.js
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	import { inject, computedFrom } from 'aurelia-framework';
	import { QueryViewerService } from 'views/query-viewer/query-viewer.service';
	import { I2B2Service } from 'common/i2b2.service.js';

	@inject(QueryViewerService, I2B2Service)
	export class QueryViewer {
	constructor(service, i2b2Svc) {

	// -- init -- //
	this.screenIndex = 0;
	this.showCircles = false;
	this.service = service;
	this.vertStyle = 'v-min';

	// -- fetch queries -- //
	const parseResultToScreens = result => this.service.getScreens(result.adapters, result.queryResults);
	const setVM = screens => {
	this.screens = screens;
	this.showCircles = this.screens.length > 1;
	};
	const refresh = () => this.service
	.fetchPreviousQueries()
	.then(parseResultToScreens)
	.then(setVM)
	.catch(error => console.log(error));

	// -- add i2b2 event listener -- //
	const isMinimized = e => e.action !== 'ADD';
	i2b2Svc.onResize((a, b) => this.vertStyle = b.find(isMinimized) ? 'v-min' : '');
	i2b2Svc.onHistory(refresh);

	// -- init -- //
	refresh();
	}
	}