653 lines
20 KiB
JavaScript
653 lines
20 KiB
JavaScript
/** @format */
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/**
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* External dependencies
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*/
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import { findIndex, get } from 'lodash';
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import { max as d3Max } from 'd3-array';
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import { axisBottom as d3AxisBottom, axisLeft as d3AxisLeft } from 'd3-axis';
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import { format as d3Format } from 'd3-format';
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import {
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scaleBand as d3ScaleBand,
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scaleLinear as d3ScaleLinear,
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scaleTime as d3ScaleTime,
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} from 'd3-scale';
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import { event as d3Event, select as d3Select } from 'd3-selection';
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import { line as d3Line } from 'd3-shape';
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import { format as formatDate } from '@wordpress/date';
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/**
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* Internal dependencies
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*/
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import { formatCurrency } from 'lib/currency';
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/**
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* Describes `smallestFactor`
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* @param {number} inputNum - any double or integer
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* @returns {integer} smallest factor of num
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*/
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export const getFactors = inputNum => {
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const num_factors = [];
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for ( let i = 1; i <= Math.floor( Math.sqrt( inputNum ) ); i += 1 ) {
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if ( inputNum % i === 0 ) {
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num_factors.push( i );
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inputNum / i !== i && num_factors.push( inputNum / i );
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}
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}
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num_factors.sort( ( x, y ) => x - y ); // numeric sort
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return num_factors;
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};
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/**
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* Describes `getUniqueKeys`
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* @param {array} data - The chart component's `data` prop.
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* @returns {array} of unique category keys
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*/
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export const getUniqueKeys = data => {
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return [
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...new Set(
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data.reduce( ( accum, curr ) => {
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Object.keys( curr ).forEach( key => key !== 'date' && accum.push( key ) );
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return accum;
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}, [] )
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),
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];
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};
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/**
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* Describes `getOrderedKeys`
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* @param {array} data - The chart component's `data` prop.
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* @param {array} uniqueKeys - from `getUniqueKeys`.
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* @returns {array} of unique category keys ordered by cumulative total value
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*/
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export const getOrderedKeys = ( data, uniqueKeys ) =>
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uniqueKeys
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.map( key => ( {
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key,
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focus: true,
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total: data.reduce( ( a, c ) => a + c[ key ].value, 0 ),
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visible: true,
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} ) )
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.sort( ( a, b ) => b.total - a.total );
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/**
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* Describes `getLineData`
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* @param {array} data - The chart component's `data` prop.
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* @param {array} orderedKeys - from `getOrderedKeys`.
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* @returns {array} an array objects with a category `key` and an array of `values` with `date` and `value` properties
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*/
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export const getLineData = ( data, orderedKeys ) =>
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orderedKeys.map( row => ( {
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key: row.key,
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focus: row.focus,
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visible: row.visible,
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values: data.map( d => ( {
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date: d.date,
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focus: row.focus,
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label: get( d, [ row.key, 'label' ], '' ),
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value: get( d, [ row.key, 'value' ], 0 ),
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visible: row.visible,
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} ) ),
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} ) );
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/**
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* Describes `getUniqueDates`
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* @param {array} lineData - from `GetLineData`
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* @param {function} parseDate - D3 time format parser
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* @returns {array} an array of unique date values sorted from earliest to latest
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*/
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export const getUniqueDates = ( lineData, parseDate ) => {
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return [
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...new Set(
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lineData.reduce( ( accum, { values } ) => {
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values.forEach( ( { date } ) => accum.push( date ) );
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return accum;
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}, [] )
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),
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].sort( ( a, b ) => parseDate( a ) - parseDate( b ) );
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};
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export const getColor = ( key, params ) => {
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const smallColorScales = [
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[],
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[ 0.5 ],
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[ 0.333, 0.667 ],
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[ 0.2, 0.5, 0.8 ],
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[ 0.12, 0.375, 0.625, 0.88 ],
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];
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let keyValue = 0;
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const len = params.orderedKeys.length;
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const idx = findIndex( params.orderedKeys, d => d.key === key );
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if ( len < 5 ) {
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keyValue = smallColorScales[ len ][ idx ];
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} else {
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keyValue = idx / ( params.orderedKeys.length - 1 );
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}
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return params.colorScheme( keyValue );
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};
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/**
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* Describes getXScale
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* @param {array} uniqueDates - from `getUniqueDates`
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* @param {number} width - calculated width of the charting space
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* @returns {function} a D3 scale of the dates
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*/
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export const getXScale = ( uniqueDates, width ) =>
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d3ScaleBand()
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.domain( uniqueDates )
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.rangeRound( [ 0, width ] )
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.paddingInner( 0.1 );
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/**
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* Describes getXGroupScale
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* @param {array} orderedKeys - from `getOrderedKeys`
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* @param {function} xScale - from `getXScale`
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* @returns {function} a D3 scale for each category within the xScale range
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*/
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export const getXGroupScale = ( orderedKeys, xScale ) =>
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d3ScaleBand()
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.domain( orderedKeys.filter( d => d.visible ).map( d => d.key ) )
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.rangeRound( [ 0, xScale.bandwidth() ] )
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.padding( 0.07 );
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/**
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* Describes getXLineScale
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* @param {array} uniqueDates - from `getUniqueDates`
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* @param {number} width - calculated width of the charting space
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* @returns {function} a D3 scaletime for each date
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*/
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export const getXLineScale = ( uniqueDates, width ) =>
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d3ScaleTime()
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.domain( [ new Date( uniqueDates[ 0 ] ), new Date( uniqueDates[ uniqueDates.length - 1 ] ) ] )
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.rangeRound( [ 0, width ] );
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/**
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* Describes and rounds the maximum y value to the nearest thousadn, ten-thousand, million etc.
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* @param {array} lineData - from `getLineData`
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* @returns {number} the maximum value in the timeseries multiplied by 4/3
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*/
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export const getYMax = lineData => {
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const yMax = 4 / 3 * d3Max( lineData, d => d3Max( d.values.map( date => date.value ) ) );
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const pow3Y = Math.pow( 10, ( ( Math.log( yMax ) * Math.LOG10E + 1 ) | 0 ) - 2 ) * 3;
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return Math.ceil( yMax / pow3Y ) * pow3Y;
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};
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/**
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* Describes getYScale
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* @param {number} height - calculated height of the charting space
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* @param {number} yMax - from `getYMax`
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* @returns {function} the D3 linear scale from 0 to the value from `getYMax`
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*/
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export const getYScale = ( height, yMax ) =>
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d3ScaleLinear()
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.domain( [ 0, yMax ] )
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.rangeRound( [ height, 0 ] );
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/**
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* Describes getyTickOffset
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* @param {number} height - calculated height of the charting space
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* @param {number} scale - ratio of the expected width to calculated width (given the viewbox)
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* @param {number} yMax - from `getYMax`
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* @returns {function} the D3 linear scale from 0 to the value from `getYMax`, offset by 12 pixels down
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*/
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export const getYTickOffset = ( height, scale, yMax ) =>
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d3ScaleLinear()
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.domain( [ 0, yMax ] )
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.rangeRound( [ height + scale * 12, scale * 12 ] );
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/**
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* Describes getyTickOffset
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* @param {function} xLineScale - from `getXLineScale`.
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* @param {function} yScale - from `getYScale`.
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* @returns {function} the D3 line function for plotting all category values
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*/
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export const getLine = ( xLineScale, yScale ) =>
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d3Line()
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.x( d => xLineScale( new Date( d.date ) ) )
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.y( d => yScale( d.value ) );
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/**
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* Describes getXTicks
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* @param {array} uniqueDates - all the unique dates from the input data for the chart
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* @param {integer} width - calculated page width
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* @param {string} layout - standard, comparison or compact chart types
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* @returns {integer} number of x-axis ticks based on width and chart layout
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*/
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export const getXTicks = ( uniqueDates, width, layout ) => {
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// caluclate the maximum number of ticks allowed in the x-axis based on the width
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// and layout of the chart
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let ticks = 16;
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if ( width < 783 ) {
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ticks = 7;
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} else if ( width >= 783 && width < 1129 ) {
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ticks = 12;
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} else if ( width >= 1130 && width < 1365 ) {
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if ( layout === 'standard' ) {
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ticks = 16;
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} else if ( layout === 'comparison' ) {
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ticks = 12;
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} else if ( layout === 'compact' ) {
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ticks = 7;
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}
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} else if ( width >= 1365 ) {
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if ( layout === 'standard' ) {
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ticks = 31;
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} else if ( layout === 'comparison' ) {
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ticks = 16;
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} else if ( layout === 'compact' ) {
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ticks = 12;
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}
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}
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if ( uniqueDates.length <= ticks ) {
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return uniqueDates;
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}
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let factors = [];
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let i = 0;
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// first we get all the factors of the length of the uniqieDates array
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// if the number is a prime number or near prime (with 3 factors) then we
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// step down by 1 integer and try again
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while ( factors.length <= 3 ) {
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factors = getFactors( uniqueDates.length - ( 1 + i ) );
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i += 1;
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}
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let newTicks = [];
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let factorIndex = 0;
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// newTicks is the first tick plus the smallest factor (initiallY) etc.
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// however, if we still end up with too many ticks we look at the next factor
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// and try again unttil we have fewer ticks than the max
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while ( newTicks.length > ticks || newTicks.length === 0 ) {
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if ( newTicks.length > ticks ) {
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factorIndex += 1;
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newTicks = [];
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}
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for ( let idx = 0; idx < uniqueDates.length; idx = idx + factors[ factorIndex ] ) {
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newTicks.push( uniqueDates[ idx ] );
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}
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}
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// if, for some reason, the first or last date is missing from the newTicks array, add it back in
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if ( newTicks[ 0 ] !== uniqueDates[ 0 ] ) {
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newTicks.unshift( uniqueDates[ 0 ] );
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}
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if ( newTicks[ newTicks.length - 1 ] !== uniqueDates[ uniqueDates.length - 1 ] ) {
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newTicks.push( uniqueDates[ uniqueDates.length - 1 ] );
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}
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return newTicks;
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};
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/**
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* Describes getDateSpaces
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* @param {array} uniqueDates - from `getUniqueDates`
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* @param {number} width - calculated width of the charting space
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* @param {function} xLineScale - from `getXLineScale`
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* @returns {array} that icnludes the date, start (x position) and width to layout the mouseover rectangles
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*/
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export const getDateSpaces = ( uniqueDates, width, xLineScale ) =>
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uniqueDates.map( ( d, i ) => {
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const xNow = xLineScale( new Date( d ) );
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const xPrev =
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i >= 1
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? xLineScale( new Date( uniqueDates[ i - 1 ] ) )
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: xLineScale( new Date( uniqueDates[ 0 ] ) );
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const xNext =
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i < uniqueDates.length - 1
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? xLineScale( new Date( uniqueDates[ i + 1 ] ) )
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: xLineScale( new Date( uniqueDates[ uniqueDates.length - 1 ] ) );
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let xWidth = i === 0 ? xNext - xNow : xNow - xPrev;
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const xStart = i === 0 ? 0 : xNow - xWidth / 2;
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xWidth = i === 0 || i === uniqueDates.length - 1 ? xWidth / 2 : xWidth;
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return {
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date: d,
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start: uniqueDates.length > 1 ? xStart : 0,
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width: uniqueDates.length > 1 ? xWidth : width,
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};
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} );
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export const drawAxis = ( node, params ) => {
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const xScale = params.type === 'line' ? params.xLineScale : params.xScale;
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const yGrids = [];
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for ( let i = 0; i < 4; i++ ) {
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yGrids.push( i / 3 * params.yMax );
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}
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const ticks = params.xTicks.map( d => ( params.type === 'line' ? new Date( d ) : d ) );
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node
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.append( 'g' )
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.attr( 'class', 'axis' )
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.attr( 'aria-hidden', 'true' )
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.attr( 'transform', `translate(0,${ params.height })` )
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.call(
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d3AxisBottom( xScale )
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.tickValues( ticks )
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.tickFormat( d => params.xFormat( d instanceof Date ? d : new Date( d ) ) )
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);
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node
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.append( 'g' )
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.attr( 'class', 'axis axis-month' )
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.attr( 'aria-hidden', 'true' )
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.attr( 'transform', `translate(3, ${ params.height + 20 })` )
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.call(
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d3AxisBottom( xScale )
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.tickValues( ticks )
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.tickFormat( ( d, i ) => {
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const monthDate = d instanceof Date ? d : new Date( d );
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let prevMonth = i !== 0 ? ticks[ i - 1 ] : ticks[ i ];
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prevMonth = prevMonth instanceof Date ? prevMonth : new Date( prevMonth );
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return monthDate.getDate() === 1 ||
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i === 0 ||
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params.x2Format( monthDate ) !== params.x2Format( prevMonth )
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? params.x2Format( monthDate )
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: '';
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} )
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)
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.call( g => g.select( '.domain' ).remove() );
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node
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.selectAll( '.axis-month .tick text' )
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.style( 'font-size', `${ Math.round( params.scale * 10 ) }px` );
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node
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.append( 'g' )
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.attr( 'class', 'pipes' )
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.attr( 'transform', `translate(0, ${ params.height })` )
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.call(
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d3AxisBottom( xScale )
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.tickValues( ticks )
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.tickSize( 5 )
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.tickFormat( '' )
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);
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node
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.append( 'g' )
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.attr( 'class', 'grid' )
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.attr( 'transform', `translate(-${ params.margin.left },0)` )
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.call(
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d3AxisLeft( params.yScale )
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.tickValues( yGrids )
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.tickSize( -params.width - params.margin.left - params.margin.right )
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.tickFormat( '' )
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)
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.call( g => g.select( '.domain' ).remove() );
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node
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.append( 'g' )
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.attr( 'class', 'axis y-axis' )
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.attr( 'aria-hidden', 'true' )
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.attr( 'transform', 'translate(-50, 0)' )
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.attr( 'text-anchor', 'start' )
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.call(
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d3AxisLeft( params.yTickOffset )
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.tickValues( yGrids )
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.tickFormat( d => d3Format( params.yFormat )( d !== 0 ? d : 0 ) )
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);
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node
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.selectAll( '.y-axis .tick text' )
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.style( 'font-size', `${ Math.round( params.scale * 10 ) }px` );
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node.selectAll( '.domain' ).remove();
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node
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.selectAll( '.axis' )
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.selectAll( '.tick' )
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.select( 'line' )
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.remove();
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};
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const getTooltipRowLabel = ( d, row, params ) =>
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d[ row.key ].labelDate ? formatDate( params.pointLabelFormat, d[ row.key ].labelDate ) : row.key;
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const showTooltip = ( params, d, position ) => {
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const keys = params.orderedKeys.filter( row => row.visible ).map(
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row => `
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<li class="key-row">
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<div class="key-container">
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<span class="key-color" style="background-color:${ getColor( row.key, params ) }"></span>
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<span class="key-key">${ getTooltipRowLabel( d, row, params ) }</span>
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</div>
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<span class="key-value">${ formatCurrency( d[ row.key ].value ) }</span>
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</li>
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`
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);
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const tooltipTitle = params.tooltipTitle
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? params.tooltipTitle
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: params.tooltipFormat( d.date instanceof Date ? d.date : new Date( d.date ) );
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params.tooltip
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.style( 'left', position.x + 'px' )
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.style( 'top', position.y + 'px' )
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.style( 'visibility', 'visible' ).html( `
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<div>
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<h4>${ tooltipTitle }</h4>
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<ul>
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${ keys.join( '' ) }
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</ul>
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</div>
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` );
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};
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const handleMouseOverBarChart = ( date, parentNode, node, data, params, position ) => {
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d3Select( parentNode )
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.select( '.barfocus' )
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.attr( 'opacity', '0.1' );
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showTooltip( params, data.find( e => e.date === date ), position );
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};
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const handleMouseOutBarChart = ( parentNode, params ) => {
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d3Select( parentNode )
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.select( '.barfocus' )
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.attr( 'opacity', '0' );
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params.tooltip.style( 'visibility', 'hidden' );
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};
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const handleMouseOverLineChart = ( date, parentNode, node, data, params, position ) => {
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d3Select( parentNode )
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.select( '.focus-grid' )
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.attr( 'opacity', '1' );
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showTooltip( params, data.find( e => e.date === date ), position );
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};
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const handleMouseOutLineChart = ( parentNode, params ) => {
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d3Select( parentNode )
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.select( '.focus-grid' )
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.attr( 'opacity', '0' );
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params.tooltip.style( 'visibility', 'hidden' );
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};
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const calculateTooltipPosition = ( element, chart, elementWidthRatio = 1 ) => {
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const elementCoords = element.getBoundingClientRect();
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const chartCoords = chart.getBoundingClientRect();
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const tooltipSize = d3Select( '.tooltip' )
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.node()
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.getBoundingClientRect();
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const tooltipMargin = 24;
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let xPosition =
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elementCoords.x + elementCoords.width * elementWidthRatio + tooltipMargin - chartCoords.x;
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let yPosition = elementCoords.y + tooltipMargin - chartCoords.y;
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if ( xPosition + tooltipSize.width + tooltipMargin > chartCoords.width ) {
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xPosition = Math.max(
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0,
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elementCoords.x +
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elementCoords.width * ( 1 - elementWidthRatio ) -
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tooltipSize.width -
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tooltipMargin -
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chartCoords.x
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);
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}
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if ( yPosition + tooltipSize.height + tooltipMargin > chartCoords.height ) {
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yPosition = Math.max( 0, elementCoords.y - tooltipSize.height - tooltipMargin - chartCoords.y );
|
|
}
|
|
|
|
return { x: xPosition, y: yPosition };
|
|
};
|
|
|
|
export const drawLines = ( node, data, params ) => {
|
|
const series = node
|
|
.append( 'g' )
|
|
.attr( 'class', 'lines' )
|
|
.selectAll( '.line-g' )
|
|
.data( params.lineData.filter( d => d.visible ).reverse() )
|
|
.enter()
|
|
.append( 'g' )
|
|
.attr( 'class', 'line-g' )
|
|
.attr( 'role', 'region' )
|
|
.attr( 'aria-label', d => d.key );
|
|
|
|
series
|
|
.append( 'path' )
|
|
.attr( 'fill', 'none' )
|
|
.attr( 'stroke-width', 3 )
|
|
.attr( 'stroke-linejoin', 'round' )
|
|
.attr( 'stroke-linecap', 'round' )
|
|
.attr( 'stroke', d => getColor( d.key, params ) )
|
|
.style( 'opacity', d => {
|
|
const opacity = d.focus ? 1 : 0.1;
|
|
return d.visible ? opacity : 0;
|
|
} )
|
|
.attr( 'd', d => params.line( d.values ) );
|
|
|
|
params.uniqueDates.length < 50 &&
|
|
series
|
|
.selectAll( 'circle' )
|
|
.data( ( d, i ) => d.values.map( row => ( { ...row, i, visible: d.visible, key: d.key } ) ) )
|
|
.enter()
|
|
.append( 'circle' )
|
|
.attr( 'r', 6 )
|
|
.attr( 'fill', d => getColor( d.key, params ) )
|
|
.attr( 'stroke', '#fff' )
|
|
.attr( 'stroke-width', 3 )
|
|
.style( 'opacity', d => {
|
|
const opacity = d.focus ? 1 : 0.1;
|
|
return d.visible ? opacity : 0;
|
|
} )
|
|
.attr( 'cx', d => params.xLineScale( new Date( d.date ) ) )
|
|
.attr( 'cy', d => params.yScale( d.value ) )
|
|
.attr( 'tabindex', '0' )
|
|
.attr( 'aria-label', d => {
|
|
const label = d.label
|
|
? d.label
|
|
: params.tooltipFormat( d.date instanceof Date ? d.date : new Date( d.date ) );
|
|
return `${ label } ${ formatCurrency( d.value ) }`;
|
|
} )
|
|
.on( 'focus', ( d, i, nodes ) => {
|
|
const position = calculateTooltipPosition( d3Event.target, node.node() );
|
|
handleMouseOverLineChart( d.date, nodes[ i ].parentNode, node, data, params, position );
|
|
} )
|
|
.on( 'blur', ( d, i, nodes ) => handleMouseOutLineChart( nodes[ i ].parentNode, params ) );
|
|
|
|
const focus = node
|
|
.append( 'g' )
|
|
.attr( 'class', 'focusspaces' )
|
|
.selectAll( '.focus' )
|
|
.data( params.dateSpaces )
|
|
.enter()
|
|
.append( 'g' )
|
|
.attr( 'class', 'focus' );
|
|
|
|
focus
|
|
.append( 'line' )
|
|
.attr( 'class', 'focus-grid' )
|
|
.attr( 'x1', d => params.xLineScale( new Date( d.date ) ) )
|
|
.attr( 'y1', 0 )
|
|
.attr( 'x2', d => params.xLineScale( new Date( d.date ) ) )
|
|
.attr( 'y2', params.height )
|
|
.attr( 'opacity', '0' );
|
|
|
|
focus
|
|
.append( 'rect' )
|
|
.attr( 'class', 'focus-g' )
|
|
.attr( 'x', d => d.start )
|
|
.attr( 'y', 0 )
|
|
.attr( 'width', d => d.width )
|
|
.attr( 'height', params.height )
|
|
.attr( 'opacity', 0 )
|
|
.on( 'mouseover', ( d, i, nodes ) => {
|
|
const elementWidthRatio = i === 0 || i === params.dateSpaces.length - 1 ? 0 : 0.5;
|
|
const position = calculateTooltipPosition( d3Event.target, node.node(), elementWidthRatio );
|
|
handleMouseOverLineChart( d.date, nodes[ i ].parentNode, node, data, params, position );
|
|
} )
|
|
.on( 'mouseout', ( d, i, nodes ) => handleMouseOutLineChart( nodes[ i ].parentNode, params ) );
|
|
};
|
|
|
|
export const drawBars = ( node, data, params ) => {
|
|
const barGroup = node
|
|
.append( 'g' )
|
|
.attr( 'class', 'bars' )
|
|
.selectAll( 'g' )
|
|
.data( data )
|
|
.enter()
|
|
.append( 'g' )
|
|
.attr( 'transform', d => `translate(${ params.xScale( d.date ) },0)` )
|
|
.attr( 'class', 'bargroup' )
|
|
.attr( 'role', 'region' )
|
|
.attr(
|
|
'aria-label',
|
|
d =>
|
|
params.mode === 'item-comparison'
|
|
? params.tooltipFormat( d.date instanceof Date ? d.date : new Date( d.date ) )
|
|
: null
|
|
);
|
|
|
|
barGroup
|
|
.append( 'rect' )
|
|
.attr( 'class', 'barfocus' )
|
|
.attr( 'x', 0 )
|
|
.attr( 'y', 0 )
|
|
.attr( 'width', params.xGroupScale.range()[ 1 ] )
|
|
.attr( 'height', params.height )
|
|
.attr( 'opacity', '0' );
|
|
|
|
barGroup
|
|
.selectAll( '.bar' )
|
|
.data( d =>
|
|
params.orderedKeys.filter( row => row.visible ).map( row => ( {
|
|
key: row.key,
|
|
focus: row.focus,
|
|
value: get( d, [ row.key, 'value' ], 0 ),
|
|
label: get( d, [ row.key, 'label' ], '' ),
|
|
visible: row.visible,
|
|
date: d.date,
|
|
} ) )
|
|
)
|
|
.enter()
|
|
.append( 'rect' )
|
|
.attr( 'class', 'bar' )
|
|
.attr( 'x', d => params.xGroupScale( d.key ) )
|
|
.attr( 'y', d => params.yScale( d.value ) )
|
|
.attr( 'width', params.xGroupScale.bandwidth() )
|
|
.attr( 'height', d => params.height - params.yScale( d.value ) )
|
|
.attr( 'fill', d => getColor( d.key, params ) )
|
|
.attr( 'tabindex', '0' )
|
|
.attr( 'aria-label', d => {
|
|
const label = params.mode === 'time-comparison' && d.label ? d.label : d.key;
|
|
return `${ label } ${ formatCurrency( d.value ) }`;
|
|
} )
|
|
.style( 'opacity', d => {
|
|
const opacity = d.focus ? 1 : 0.1;
|
|
return d.visible ? opacity : 0;
|
|
} )
|
|
.on( 'focus', ( d, i, nodes ) => {
|
|
const targetNode = d.value > 0 ? d3Event.target : d3Event.target.parentNode;
|
|
const position = calculateTooltipPosition( targetNode, node.node() );
|
|
handleMouseOverBarChart( d.date, nodes[ i ].parentNode, node, data, params, position );
|
|
} )
|
|
.on( 'blur', ( d, i, nodes ) => handleMouseOutBarChart( nodes[ i ].parentNode, params ) );
|
|
|
|
barGroup
|
|
.append( 'rect' )
|
|
.attr( 'class', 'barmouse' )
|
|
.attr( 'x', 0 )
|
|
.attr( 'y', 0 )
|
|
.attr( 'width', params.xGroupScale.range()[ 1 ] )
|
|
.attr( 'height', params.height )
|
|
.attr( 'opacity', '0' )
|
|
.on( 'mouseover', ( d, i, nodes ) => {
|
|
const position = calculateTooltipPosition( d3Event.target, node.node() );
|
|
handleMouseOverBarChart( d.date, nodes[ i ].parentNode, node, data, params, position );
|
|
} )
|
|
.on( 'mouseout', ( d, i, nodes ) => handleMouseOutBarChart( nodes[ i ].parentNode, params ) );
|
|
};
|