tracim_v2/frontend_lib/src/component/PopinFixed/PopinFixedContent.jsx

import React from 'react'
import classnames from 'classnames'
import PropTypes from 'prop-types'

class PopinFixedContent extends React.Component {
  constructor (props) {
    super(props)
    this.state = {
      rightPartOpen: false
    }
  }

  componentDidMount () {
    if (this.props.showRightPartOnLoad) this.setState({rightPartOpen: true})
  }

  handleToggleRightPart = () => {
    this.setState(prev => ({rightPartOpen: !prev.rightPartOpen}))
  }

  render () {
    return this.props.children.length === 2
      ? (
        <div className={classnames(
          'wsContentGeneric__content',
          `${this.props.customClass}__content`,
          {'rightPartOpen': this.state.rightPartOpen, 'rightPartClose': !this.state.rightPartOpen}
        )}>
          <div className={classnames('wsContentGeneric__content__left', `${this.props.customClass}__content__left`)}>
            {this.props.children[0]}
          </div>

          <div className={classnames('wsContentGeneric__content__right', `${this.props.customClass}__content__right`)}>
            {React.cloneElement(this.props.children[1], {
              toggleRightPart: this.handleToggleRightPart,
              rightPartOpen: this.state.rightPartOpen
            })}
          </div>
        </div>
      )
      : (
        <div className={classnames('wsContentGeneric__content', `${this.props.customClass}__content`)}>
          {this.props.children}
        </div>
      )
  }
}

export default PopinFixedContent

PopinFixedContent.propTypes = {
  customClass: PropTypes.string,
  children: (props, propName, componentName) => {
    if (Array.isArray(props) && props.length !== 2) {
      return new Error(`PropType Error: ${componentName} must have 1 or 2 children.`)
    } else if (typeof props !== 'object') {
      return new Error(`PropType Error: childrens of ${componentName} must have 1 or 2 children.`)
    }
  }
}