content: import React from 'react';
  import { Consumer } from '@storybook/api';
  import { Provider } from '@storybook/ui';
  import createChannel from '@storybook/channel-websocket';
  import addons from '@storybook/addons';
  import Events from '@storybook/core-events';
  import uuid from 'uuid';
  import PreviewHelp from './components/PreviewHelp';
  
  const mapper = ({ state, api }) => ({
    api,
    storiesHash: state.storiesHash,
    storyId: state.storyId,
    viewMode: state.viewMode,
  });
  
  export default class ReactProvider extends Provider {
    constructor({ url: domain, options }) {
      super();
  
      const { secured, host, port } = options;
      const websocketType = secured ? 'wss' : 'ws';
      let url = `${websocketType}://${domain}`;
  
      if (options.manualId) {
        this.pairedId = uuid();
        url += `/pairedId=${this.pairedId}`;
      }
  
      const channel = this.channel || createChannel({ url });
  
      addons.setChannel(channel);
      channel.emit(Events.CHANNEL_CREATED, {
        host,
        pairedId: this.pairedId,
        port,
        secured,
      });
  
      this.addons = addons;
      this.channel = channel;
      this.options = options;
    }
  
    getElements(type) {
      return addons.getElements(type);
    }
  
    getConfig() {
      return this.addons.getConfig();
    }
  
    renderPreview() {
      return (
        <Consumer filter={mapper} pure>
          {({ storiesHash, storyId, api, viewMode }) => {
            if (storiesHash[storyId]) {
              api.emit(Events.SET_CURRENT_STORY, { storyId });
            }
            return viewMode === 'story' ? <PreviewHelp /> : null;
          }}
        </Consumer>
      );
    }
  
    handleAPI(api) {
      addons.loadAddons(api);
      api.emit(Events.GET_STORIES);
    }
  }
  