portal shit!

  // クリックされたアイテムが `this.state.disabled` 配列の中にすでに存在していれば除外し、
  // 存在してなければ追加する
  selectBar(event) {
    let dataKey = event.dataKey.trim()
    if (this.state.disabled.includes(dataKey)) {
      this.setState({ disabled: this.state.disabled.filter(item => item !== dataKey) })
    } else {
      this.setState({ disabled: this.state.disabled.concat([dataKey]) })
    }
  }

  render() {
    return (
      <ResponsiveContainer height={500}>
        <BarChart
          data={this.state.data}
          margin={{
            top: 20, right: 20, left: 0, bottom: 20,
          }}
          style={{ fontSize: '14px' }}
        >
          <CartesianGrid strokeDasharray="3 3" />
          <XAxis dataKey="year" />
          <YAxis />
          <Tooltip labelStyle={{ color: '#000', fontWeight: 'bold' }} itemStyle={{ margin: '0 2px 0 4px', padding: '0' }} />
          {// Legend クリック時のコールバックに `this.selectBar` を指定する }
          <Legend onClick={this.selectBar} />
          {/*
            `this.state.categories` 配列と `this.state.disabled` 配列の内容を比較し、
            `this.state.disabled` に追加済のカテゴリーは dataKey に空白を追加することで非表示に
          */}
          {this.state.categories.map((category, index) => {
            let dataKey = this.state.disabled.includes(category) ? category + " " : category
            let color = this.colors[index % this.colors.length]
            return(<Bar key={index} dataKey={dataKey} stackId="a" fill={color} />)
          })}
        </BarChart>
      </ResponsiveContainer>
    );
  }

import React, { Component } from 'react'
import ReactDOM from 'react-dom'
import Select from 'react-select'
import PropTypes from 'prop-types'
import { withRouter } from 'react-router-dom'

import history from './history'

class YearSelect extends Component {
  constructor(props) {
    super(props)
    this.state = {
      data: [],
      selectedOption: null
    }
    this.handleChange = this.handleChange.bind(this)
  }

  static propTypes = {
    match: PropTypes.object.isRequired,
    location: PropTypes.object.isRequired,
    history: PropTypes.object.isRequired
  }

  async loadYearSelectFromServer() {
    const request = await fetch('/archives/years.json')
    const response = await request.json()
    this.setState({ data: response })
  }

  componentDidMount() {
    this.loadYearSelectFromServer()
  }

  handleChange(selectedOption) {
    const year = selectedOption ? selectedOption.value : null
    if (year) {
      this.props.history.push(`/archives/${year}`)
    } else {
      this.props.history.push("/archives")
    }
    this.setState(
      { selectedOption },
      () => { this.props.update(year) }
    )
  }

  render() {
    const options = this.state.data.map(year => {
      return { value: year, label: year }
    })
    return (
      <div className="year-list">
        <Select
          value={this.state.selectedOption}
          onChange={this.handleChange}
          options={options}
          placeholder="Year"
          isClearable
        />
      </div>
    )
  }
}

const YearList = withRouter(YearSelect)

export default YearList

import React, { Component } from 'react'
import { BrowserRouter as Router, Switch, Route, Redirect } from 'react-router-dom'

import YearList from './YearList'
import CategoryList from './CategoryList'
import Archives from './Archives'

class App extends Component {
  constructor(props) {
    super(props)
    this.state = {
      category: null,
      year: null,
      length: 0
    }
    this.updateCategory = this.updateCategory.bind(this)
    this.updateYear = this.updateYear.bind(this)
    this.setLength = this.setLength.bind(this)
  }

  updateCategory(category) {
    this.setState({ category })
  }

  updateYear(year) {
    this.setState({ year })
  }

  setLength(length) {
    this.setState({ length })
  }

  render() {
    return(
      <Router history={history}>
        <div className="archive-filter">
          <YearList update={this.updateYear} />
          <CategoryList update={this.updateCategory} activeCategory={this.state.category} />
          <div className="entry-length"><p>{this.state.length} entries</p></div>
        </div>
        <Switch>
          <Route
            exact path="/archives"
            render={(props) =>
              <Archives
                category={this.state.category}
                setLength={this.setLength}
                {...props}
              />
            }
          />
          <Route
            path="/archives/:year(\d{4})"
            render={(props) =>
              <Archives
                category={this.state.category}
                setLength={this.setLength}
                year={this.state.year}
                {...props}
              />
            }
          />
        </Switch>
      </Router>
    )
  }
}

export default App