content: import React from 'react';
  import PropTypes from 'prop-types';
  import { injectIntl, defineMessages } from 'react-intl';
  import IconButton from '../../../components/icon_button';
  import Overlay from 'react-overlays/lib/Overlay';
  import Motion from '../../ui/util/optional_motion';
  import spring from 'react-motion/lib/spring';
  import { supportsPassiveEvents } from 'detect-passive-events';
  import classNames from 'classnames';
  import Icon from 'mastodon/components/icon';
  
  const messages = defineMessages({
    public_short: { id: 'privacy.public.short', defaultMessage: 'Public' },
    public_long: { id: 'privacy.public.long', defaultMessage: 'Visible for all' },
    unlisted_short: { id: 'privacy.unlisted.short', defaultMessage: 'Unlisted' },
    unlisted_long: { id: 'privacy.unlisted.long', defaultMessage: 'Visible for all, but opted-out of discovery features' },
    private_short: { id: 'privacy.private.short', defaultMessage: 'Followers only' },
    private_long: { id: 'privacy.private.long', defaultMessage: 'Visible for followers only' },
    direct_short: { id: 'privacy.direct.short', defaultMessage: 'Mentioned people only' },
    direct_long: { id: 'privacy.direct.long', defaultMessage: 'Visible for mentioned users only' },
    change_privacy: { id: 'privacy.change', defaultMessage: 'Adjust status privacy' },
  });
  
  const listenerOptions = supportsPassiveEvents ? { passive: true } : false;
  
  class PrivacyDropdownMenu extends React.PureComponent {
  
    static propTypes = {
      style: PropTypes.object,
      items: PropTypes.array.isRequired,
      value: PropTypes.string.isRequired,
      placement: PropTypes.string.isRequired,
      onClose: PropTypes.func.isRequired,
      onChange: PropTypes.func.isRequired,
    };
  
    state = {
      mounted: false,
    };
  
    handleDocumentClick = e => {
      if (this.node && !this.node.contains(e.target)) {
        this.props.onClose();
      }
    }
  
    handleKeyDown = e => {
      const { items } = this.props;
      const value = e.currentTarget.getAttribute('data-index');
      const index = items.findIndex(item => {
        return (item.value === value);
      });
      let element = null;
  
      switch(e.key) {
      case 'Escape':
        this.props.onClose();
        break;
      case 'Enter':
        this.handleClick(e);
        break;
      case 'ArrowDown':
        element = this.node.childNodes[index + 1] || this.node.firstChild;
        break;
      case 'ArrowUp':
        element = this.node.childNodes[index - 1] || this.node.lastChild;
        break;
      case 'Tab':
        if (e.shiftKey) {
          element = this.node.childNodes[index - 1] || this.node.lastChild;
        } else {
          element = this.node.childNodes[index + 1] || this.node.firstChild;
        }
        break;
      case 'Home':
        element = this.node.firstChild;
        break;
      case 'End':
        element = this.node.lastChild;
        break;
      }
  
      if (element) {
        element.focus();
        this.props.onChange(element.getAttribute('data-index'));
        e.preventDefault();
        e.stopPropagation();
      }
    }
  
    handleClick = e => {
      const value = e.currentTarget.getAttribute('data-index');
  
      e.preventDefault();
  
      this.props.onClose();
      this.props.onChange(value);
    }
  
    componentDidMount () {
      document.addEventListener('click', this.handleDocumentClick, false);
      document.addEventListener('touchend', this.handleDocumentClick, listenerOptions);
      if (this.focusedItem) this.focusedItem.focus({ preventScroll: true });
      this.setState({ mounted: true });
    }
  
    componentWillUnmount () {
      document.removeEventListener('click', this.handleDocumentClick, false);
      document.removeEventListener('touchend', this.handleDocumentClick, listenerOptions);
    }
  
    setRef = c => {
      this.node = c;
    }
  
    setFocusRef = c => {
      this.focusedItem = c;
    }
  
    render () {
      const { mounted } = this.state;
      const { style, items, placement, value } = this.props;
  
      return (
        <Motion defaultStyle={{ opacity: 0, scaleX: 0.85, scaleY: 0.75 }} style={{ opacity: spring(1, { damping: 35, stiffness: 400 }), scaleX: spring(1, { damping: 35, stiffness: 400 }), scaleY: spring(1, { damping: 35, stiffness: 400 }) }}>
          {({ opacity, scaleX, scaleY }) => (
            // It should not be transformed when mounting because the resulting
            // size will be used to determine the coordinate of the menu by
            // react-overlays
            <div className={`privacy-dropdown__dropdown ${placement}`} style={{ ...style, opacity: opacity, transform: mounted ? `scale(${scaleX}, ${scaleY})` : null }} role='listbox' ref={this.setRef}>
              {items.map(item => (
                <div role='option' tabIndex='0' key={item.value} data-index={item.value} onKeyDown={this.handleKeyDown} onClick={this.handleClick} className={classNames('privacy-dropdown__option', { active: item.value === value })} aria-selected={item.value === value} ref={item.value === value ? this.setFocusRef : null}>
                  <div className='privacy-dropdown__option__icon'>
                    <Icon id={item.icon} fixedWidth />
                  </div>
  
                  <div className='privacy-dropdown__option__content'>
                    <strong>{item.text}</strong>
                    {item.meta}
                  </div>
                </div>
              ))}
            </div>
          )}
        </Motion>
      );
    }
  
  }
  
  export default @injectIntl
  class PrivacyDropdown extends React.PureComponent {
  
    static propTypes = {
      isUserTouching: PropTypes.func,
      onModalOpen: PropTypes.func,
      onModalClose: PropTypes.func,
      value: PropTypes.string.isRequired,
      onChange: PropTypes.func.isRequired,
      noDirect: PropTypes.bool,
      container: PropTypes.func,
      disabled: PropTypes.bool,
      intl: PropTypes.object.isRequired,
    };
  
    state = {
      open: false,
      placement: 'bottom',
    };
  
    handleToggle = ({ target }) => {
      if (this.props.isUserTouching && this.props.isUserTouching()) {
        if (this.state.open) {
          this.props.onModalClose();
        } else {
          this.props.onModalOpen({
            actions: this.options.map(option => ({ ...option, active: option.value === this.props.value })),
            onClick: this.handleModalActionClick,
          });
        }
      } else {
        const { top } = target.getBoundingClientRect();
        if (this.state.open && this.activeElement) {
          this.activeElement.focus({ preventScroll: true });
        }
        this.setState({ placement: top * 2 < innerHeight ? 'bottom' : 'top' });
        this.setState({ open: !this.state.open });
      }
    }
  
    handleModalActionClick = (e) => {
      e.preventDefault();
  
      const { value } = this.options[e.currentTarget.getAttribute('data-index')];
  
      this.props.onModalClose();
      this.props.onChange(value);
    }
  
    handleKeyDown = e => {
      switch(e.key) {
      case 'Escape':
        this.handleClose();
        break;
      }
    }
  
    handleMouseDown = () => {
      if (!this.state.open) {
        this.activeElement = document.activeElement;
      }
    }
  
    handleButtonKeyDown = (e) => {
      switch(e.key) {
      case ' ':
      case 'Enter':
        this.handleMouseDown();
        break;
      }
    }
  
    handleClose = () => {
      if (this.state.open && this.activeElement) {
        this.activeElement.focus({ preventScroll: true });
      }
      this.setState({ open: false });
    }
  
    handleChange = value => {
      this.props.onChange(value);
    }
  
    componentWillMount () {
      const { intl: { formatMessage } } = this.props;
  
      this.options = [
        { icon: 'globe', value: 'public', text: formatMessage(messages.public_short), meta: formatMessage(messages.public_long) },
        { icon: 'unlock', value: 'unlisted', text: formatMessage(messages.unlisted_short), meta: formatMessage(messages.unlisted_long) },
        { icon: 'lock', value: 'private', text: formatMessage(messages.private_short), meta: formatMessage(messages.private_long) },
      ];
  
      if (!this.props.noDirect) {
        this.options.push(
          { icon: 'at', value: 'direct', text: formatMessage(messages.direct_short), meta: formatMessage(messages.direct_long) },
        );
      }
    }
  
    render () {
      const { value, container, disabled, intl } = this.props;
      const { open, placement } = this.state;
  
      const valueOption = this.options.find(item => item.value === value);
  
      return (
        <div className={classNames('privacy-dropdown', placement, { active: open })} onKeyDown={this.handleKeyDown}>
          <div className={classNames('privacy-dropdown__value', { active: this.options.indexOf(valueOption) === (placement === 'bottom' ? 0 : (this.options.length - 1)) })}>
            <IconButton
              className='privacy-dropdown__value-icon'
              icon={valueOption.icon}
              title={intl.formatMessage(messages.change_privacy)}
              size={18}
              expanded={open}
              active={open}
              inverted
              onClick={this.handleToggle}
              onMouseDown={this.handleMouseDown}
              onKeyDown={this.handleButtonKeyDown}
              style={{ height: null, lineHeight: '27px' }}
              disabled={disabled}
            />
          </div>
  
          <Overlay show={open} placement={placement} target={this} container={container}>
            <PrivacyDropdownMenu
              items={this.options}
              value={value}
              onClose={this.handleClose}
              onChange={this.handleChange}
              placement={placement}
            />
          </Overlay>
        </div>
      );
    }
  
  }
  