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import {Graph} from './graph';
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import {EmptyGraph} from "./emptygraph";
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import {SingleGraph} from "./singlegraph";
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import {MultiGraph} from "./multigraph";
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declare var require: any
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export class GraphLoader {
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/**
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* Loads graph with default interval value (e.g. for observation service)
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* @param sensors array of sensors to display
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* @param data source of values for vega graph
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* @param legendInfo source of legend info for graph (e.g. sensor phenomenon)
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* @param element name of html element for graph display
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* @param isAnalytics true/false analytics/observations
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*/
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static getGraph(sensors, data, legendInfo, element, isAnalytics) {
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this.getGraphWithInterval(sensors, data, 1800000, legendInfo, element, isAnalytics);
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}
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/**
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* Loads graph with specified interval (e.g. for analytics service)
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* @param sensors array of sensors to display
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* @param data source of values for vega graph
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* @param interval default graph interval used for different purposes (in milliseconds) (see timeWindow and maxTimeDifference in vega specification)
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* @param legendInfo source of legend info for graph (e.g. sensor phenomenon)
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* @param element name of html element for graph display
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* @param isAnalytics true/false analytics/observations
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*/
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static getGraphWithInterval(sensors, data, interval, legendInfo, element, isAnalytics) {
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//gets uses sensors array to get graph type
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//then gets configuration and specification from corresponding class
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let graph = this.getGraphType(sensors,data, interval, legendInfo, isAnalytics);
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let config = graph.getConfig();
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let spec = graph.getSpec();
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//then displays the graph
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this.showGraph(spec, config, element);
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}
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/**
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* Create graph of specific type according to selected sensors
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* @param sensors array of sensors to display
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* @param data source of values for vega graph
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* @param interval default graph interval used for different purposes (in milliseconds) (see timeWindow and maxTimeDifference in vega specification)
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* @param legendInfo source of legend info for graph (e.g. sensor phenomenon)
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* @param isAnalytics isAnalytics true/false analytics/observations
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*/
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static getGraphType(sensors, data, interval, legendInfo, isAnalytics): Graph {
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if (sensors == null) {
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return new EmptyGraph("No sensors selected.");
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} else if (Array.isArray(sensors)) {
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if (sensors.length == 0) {
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return new EmptyGraph("No sensors selected.");
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} else if (sensors.length == 1) {
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return new SingleGraph(sensors[0], isAnalytics, data, legendInfo,interval);
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} else {
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return new MultiGraph(isAnalytics, data, legendInfo,interval);
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}
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} else {
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return new SingleGraph(sensors, isAnalytics, data, legendInfo, interval);
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}
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}
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/**
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* Displays the graph
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* @param spec vega specification
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* @param config vega configuration
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* @param element name of html element for graph display
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*/
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static showGraph(spec, config, element) {
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const vega = require('vega');
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const vegaTooltip = require('vega-tooltip');
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const handler = new vegaTooltip.Handler();
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const view = new vega.View(vega.parse(spec, config))
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.tooltip(handler.call)
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.initialize(element)
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.hover()
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.runAsync();
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}
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}
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