Snippets
Created by
Piotr Szrajber
last modified
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/**
* Stage summarizer creates a second crossfilter on the same data and allows
* to perform computations that are only partially dependent on current stage's filter
* without explicitly creating another stage in UI.
*
*/
var SummarizerStage = class {
constructor(stage, gvc) {
this.originalStage = stage;
this.data = this.prepareData(stage.rows(), stage);
this.gvc = gvc
this.dc = gvc.dc;
this.chartCounter = 0;
let myStage = this.summarizerStage = this.createSummarizerStage();
this.dimensions = this.summarizerStage.stageModel().fields.reduce((accumulation, field) => {
let dimension = myStage.facts().dimension(function(d){
return d[field.id];
});
accumulation[field.id] = dimension;
return accumulation;
}, {});
}
createSummarizerStage() {
let stageId = "summarizer",
summarizerStage = this.gvc.dataStage(stageId),
originalStageModel = this.originalStage.stageModel(),
stageModel = {
id: stageId,
fields: originalStageModel.fields,
values: originalStageModel.values
};
summarizerStage.stageModel(stageModel);
summarizerStage.table(this.data);
summarizerStage.emitTable(stageModel);
return summarizerStage;
}
// create copy of the data without fields and values of the other stage
prepareData (data, stage) {
let stageModel = stage.stageModel(),
dimensionIds = stageModel.fields.map(field => field.id),
measureIds = stageModel.values.map(value => value.id),
ret = data.map(row => {
return Object.keys(row).filter(key => {
if (dimensionIds.includes(key)) return false;
if (measureIds.includes(key)) return false;
if (/^\$/.test(key)) return false;
return true;
}).reduce((accumulation, key) => {
accumulation[key] = row[key];
return accumulation;
}, {});
});
return ret;
}
findDimensionByName(name) {
return this.originalStage.stageModel().fields.find(field => field.name === name);
}
findMeasureByName(name) {
return this.originalStage.stageModel().values.find(value => value.name === name);
}
createNumberDisplay(selector, config) {
let domElement = document.querySelector(selector);
if (!domElement) {
console.error(`No ${selector} in the DOM`);
return;
}
let measure = this.findMeasureByName(config.measure);
if (!measure) {
console.error(`No measure with name ${config.name}`);
return null;
}
let chart = this.gvc.chart.number(domElement);
this.summarizerStage.mountWidgets({
id: `chart_${this.chartCounter++}`,
chart: "number",
name: config.name,
values: measure,
number: {
html: config.html,
format: config.format
}
}, chart);
this.widgets = this.widgets || {};
this.widgets[selector] = chart;
return chart;
}
filter(filters) {
if (!filters) {
for (let dimensionName in this.dimensions) {
this.dimensions[dimensionName].filter(null);
}
}
for (let filterName in filters) {
let dimensionModel = this.findDimensionByName(filterName);
if (!dimensionModel) {
console.warn(`No dimension named ${filterName}`);
continue;
}
let dimensionObj = this.dimensions[dimensionModel.id];
let filter = filters[filterName];
if (Array.isArray(filter)) {
if (filter.length > 0) {
dimensionObj.filter(function (d) {
return filter.indexOf(d) > -1;
});
} else {
dimensionObj.filter(null);
}
} else {
dimensionObj.filter(filter);
}
}
for (let selector in this.widgets) {
this.widgets[selector].redraw();
}
}
};
let GLOBALS = {};
/**
* Function that waits till the charts are ready (they already have SVG element)
* @param {Function} fn callback
* @return {void}
*/
function chartsReady(fn) {
let observer = new MutationObserver(function(mutations, me) {
let chartWithSvg = document.querySelector(".widget-chart.dc-chart>svg");
if (chartWithSvg) {
fn();
me.disconnect();
}
});
observer.observe(document, {
childList: true,
subtree: true
});
}
function findWidgetsByName(names, callback, errback) {
gsp.bi.stage.findWidgets({
descriptors: names.map(name => {
return {
chartM: {
name: name
}
};
})
}, function(widgets) {
if (!widgets) return errback();
callback.apply(null, widgets.map(widgetCollection => widgetCollection[0]));
});
}
function fixTimelineWidget(widget) {
let start = new Date(2012, 0, 1),
end = new Date(2017, 6, 14); //0 is January so 6 is July
widget.chart.xAxis().scale().domain([start, end]);
widget.chart.elasticY(false);
widget.chart.redraw();
}
function padTwo(num) {
let str = "" + num,
pad = "00",
ans = pad.substring(0, pad.length - str.length) + str;
return ans;
}
function setCurrentDate(year, month, day) {
let dateElement = document.querySelector(".summary4 .widget-chart"),
m = padTwo(month + 1),
d = padTwo(day);
if (dateElement) {
dateElement.innerHTML = `<div class="date-display"><span class="year">${year}</span>-<span class="month">${m}</span>-<span class="day">${d}</span></div>`;
}
}
function createNumberDisplays(importanceWidget, capacityWidget, timelinewidget) {
gsp.bi.stage.requireLibraries(function(gvc, dc) {
gsp.bi.stage.findStage(null, function(stage) {
let ss = new SummarizerStage(stage, gvc);
// initialize date filter
ss.filter({
DATE: Date(2017, 6, 14)
});
setCurrentDate(2017, 6, 14);
// synchronize date filter in the summarizer with the right date of the timeline
if (timelinewidget) {
timelinewidget.chart.on("filtered", (chart, range) => {
if (range && range[1]) {
let year = range[1].getFullYear(),
month = range[1].getMonth(), // month w javascripcie jest liczony od 0
day = range[1].getDate();
ss.filter({
DATE: new Date(year, month, day)
});
setCurrentDate(year, month, day);
}
});
}
//
if (capacityWidget) {
capacityWidget.chart.on("filtered", (chart, filter) => {
ss.filter({NAME: chart.filters()});
});
}
//
if (importanceWidget) {
importanceWidget.chart.on("filtered", (chart, filter) => {
ss.filter({IMPORTANCE: chart.filters()});
});
}
let summary1Selector = ".summary1 .widget-chart",
summary2Selector = ".summary2 .widget-chart",
summary3Selector = ".summary3 .widget-chart",
summary1,
summary2,
summary3;
if (summary1 = document.querySelector(summary1Selector)) {
summary1.innerHTML = "";
ss.createNumberDisplay(summary1Selector, {
measure: "STORAGE_Ml_pcent",
format: ".2f",
html: {
one: "Storage percentage: %number",
some: "Storage percentage: %number",
none: "Storage percentage: %number"
}
});
}
if (summary2 = document.querySelector(summary2Selector)) {
summary2.innerHTML = "";
ss.createNumberDisplay(summary2Selector, {
measure: "BULK_WATER_STORAGE_sum",
format: ".2f",
html: {
one: "Bulk water storage sum: %number",
some: "Bulk water storage sum: %number",
none: "Bulk water storage sum: %number"
}
});
}
if (summary3 = document.querySelector(summary3Selector)) {
summary3.innerHTML = "";
let nd = ss.createNumberDisplay(summary3Selector, {
measure: "DAY2DAY_LVL_CHANGE_avrg",
format: ".2f",
html: {
one: 'day to day average change: %number',
some: 'day to day average change: %number',
none: 'day to day average change: %number'
}
});
let classify = (x) => Math.abs(x) < 1e-6 ? "NO_CHANGE" : x < 0 ? "DECREASE" : "INCREASE";
nd.formatNumber(function (v){
return `<span class="${classify(v)}">${d3.format(".2f")(v)}</span>`;
});
}
});
});
}
chartsReady(function() {
findWidgetsByName(["Importance", "Dams Capacity", "Dam Storage Percentage in Time"], function(importanceWidget, capacityWidget, timelinewidget) {
fixTimelineWidget(timelinewidget);
createNumberDisplays(importanceWidget, capacityWidget, timelinewidget);
});
});
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