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import React, { Component } from 'react'
import csv from 'parse-csv'
import C3Chart from 'react-c3js'
import 'c3/c3.css'
import './chart.css'
import {
rainbow, bigRainbow, colorTable
} from './constants'
class SinglePieChart extends Component {
state = {
keys: [],
data: [],
}
componentDidMount() {
const { payload } = this.props
fetch(payload.url, { mode: 'cors' })
.then(r => r.text())
.then(text => {
try {
const keys = text.split('\n')[0].split(',').map(s => s.trim().replace(/"/, ''))
const data = csv.toJSON(text, { headers: { included: true } })
this.setState({ keys, data })
} catch (e) {
console.error("error making json:", payload.url)
console.error(e)
}
})
}
render() {
const { fields } = this.props.payload
const { keys, data } = this.state
// console.log(keys, data)
const [labelField, numberField] = keys
if (!data.length) return null
const rowsToDisplay = parseInt(fields.Top, 10)
const rows = data.map(row => {
const label = row[labelField]
const number = parseFloat(row[numberField])
return [label, number]
}).sort((a, b) => b[1] - a[1])
let chartRows = rows.slice(0, rowsToDisplay)
let otherCount = rows.slice(rowsToDisplay).reduce((a, b) => a + b[1], 0)
if (otherCount > 0) {
chartRows.push([fields.OtherLabel, otherCount])
}
const height = chartRows.length < 6 ? 316 :
chartRows.length < 10 ? 336 : 356
const pattern = colorTable[fields.Colors] || (chartRows.length < 10 ? rainbow : bigRainbow)
return (
<div className='chart'>
<div>
<C3Chart
data={{
columns: chartRows,
type: 'pie',
}}
color={{
pattern,
}}
tooltip={{
format: {
value: value => value,
}
}}
size={{
height,
}}
/>
<span className='chartCaption'>{fields.Caption}</span>
</div>
</div>
)
}
}
export default SinglePieChart
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