gab-social/app/javascript/gabsocial/features/compose/components/upload/upload.js

import ImmutablePropTypes from 'react-immutable-proptypes'
import ImmutablePureComponent from 'react-immutable-pure-component'
import { defineMessages, injectIntl } from 'react-intl'
import classNames from 'classnames'
import Button from '../../../../components/button'
import Image from '../../../../components/image'

const messages = defineMessages({
  description: { id: 'upload_form.description', defaultMessage: 'Describe for the visually impaired' },
  delete: { id: 'upload_form.undo', defaultMessage: 'Delete' },
})

export default
@injectIntl
class Upload extends ImmutablePureComponent {

  static contextTypes = {
    router: PropTypes.object,
  }

  static propTypes = {
    media: ImmutablePropTypes.map.isRequired,
    intl: PropTypes.object.isRequired,
    onUndo: PropTypes.func.isRequired,
    onDescriptionChange: PropTypes.func.isRequired,
    onSubmit: PropTypes.func.isRequired,
  }

  state = {
    hovered: false,
    focused: false,
    dirtyDescription: null,
  }

  handleKeyDown = (e) => {
    if (e.keyCode === 13 && (e.ctrlKey || e.metaKey)) {
      this.handleSubmit()
    }
  }

  handleSubmit = () => {
    this.handleInputBlur()
    this.props.onSubmit(this.context.router.history)
  }

  handleUndoClick = e => {
    e.stopPropagation()
    this.props.onUndo(this.props.media.get('id'))
  }

  handleInputChange = e => {
    this.setState({ dirtyDescription: e.target.value })
  }

  handleMouseEnter = () => {
    this.setState({ hovered: true })
  }

  handleMouseLeave = () => {
    this.setState({ hovered: false })
  }

  handleInputFocus = () => {
    this.setState({ focused: true })
  }

  handleClick = () => {
    this.setState({ focused: true })
  }

  handleInputBlur = () => {
    const { dirtyDescription } = this.state

    this.setState({
      focused: false,
      dirtyDescription: null,
    })

    if (dirtyDescription !== null) {
      this.props.onDescriptionChange(this.props.media.get('id'), dirtyDescription)
    }
  }

  render() {
    const { intl, media } = this.props
    const active = this.state.hovered || this.state.focused
    const description = this.state.dirtyDescription || (this.state.dirtyDescription !== '' && media.get('description')) || ''
    const focusX = media.getIn(['meta', 'focus', 'x'])
    const focusY = media.getIn(['meta', 'focus', 'y'])
    const x = ((focusX / 2) + .5) * 100
    const y = ((focusY / -2) + .5) * 100

    return (
      <div className='compose-form-upload' tabIndex='0' onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave} onClick={this.handleClick} role='button'>
        <div className='compose-form__upload-thumbnail' style={{ backgroundImage: `url(${media.get('preview_url')})`, backgroundPosition: `${x}% ${y}%` }}>
          <div className={classNames('compose-form__upload__actions', { active })}>
            <Button
              title={intl.formatMessage(messages.delete)}
              onClick={this.handleUndoClick}
              icon='cancel'
            />
          </div>

          <div className={classNames('compose-form-upload__description', { active })}>
            <label>
              <span style={{ display: 'none' }}>
                {intl.formatMessage(messages.description)}
              </span>

              <textarea
                placeholder={intl.formatMessage(messages.description)}
                value={description}
                maxLength={420}
                onFocus={this.handleInputFocus}
                onChange={this.handleInputChange}
                onBlur={this.handleInputBlur}
                onKeyDown={this.handleKeyDown}
              />
            </label>
          </div>
        </div>
      </div>
    )
  }

}