Netlify Custom Widget

control.js

import React from 'react';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';
import { Map } from 'immutable';
import CMS from 'netlify-cms';

export default class DynamicControl extends React.Component {
  constructor(props) {
    super(props);

    // this.props.value = Map({
    //   'slide': 'string',
    //   'slide_selected': 'Hey! Change me'
    // });

    const fieldValue = this.props.value && Map.isMap(this.props.value) ?
      this.props.value.get(this.props.field.get('name')) :
      '';

    if (!fieldValue) {
      this.state = {
        widget: null,
      };
    } else {
      this.state = {
        widget: CMS.getWidget(fieldValue),
      };
    }
  }

  handleChange = (e) => {
    this.props.onChange(Map().set(e.target.id, e.target.value));

    if (!e.target.value) {
      this.setState({
        widget: null,
      });
    } else {
      this.setState({
        widget: CMS.getWidget(e.target.value),
      });
    }
  };

  altChange = (target, val) => {
    this.props.onChange(this.props.value.set(target, val));
  }

  linkChange = (target, val) => {
    this.props.onChange(this.props.value.set(target, val));
  }

  render() {
    const { field, value, forID, onChange, onAddAsset, onRemoveAsset, getAsset } = this.props;
    const { widget } = this.state;

    const name = field.get('name');
    const selectedName = `${ field.get('name') }_selected`;
    const selectedNameAlt = `${ field.get('name') }_selected_alt`;
    const selectedNameLink = `${ field.get('name') }_selected_link`;

    const fieldValue = value && Map.isMap(value) ?
      value.get(name || '') :
      '';

    const fieldValueSelected = value && Map.isMap(value) ?
      value.get(selectedName || '') :
      '';

    const fieldValueSelectedAlt = value && Map.isMap(value) ?
      value.get(selectedNameAlt || '') :
      '';

    const fieldValueSelectedLink = value && Map.isMap(value) ?
      value.get(selectedNameLink || '') :
      '';

    let options = field.get('dynamicWidgets').map((option) => {
      if (typeof option === 'string') {
        return { label: option, value: option };
      }
      return option;
    });

    options = options.insert(0, {
      label: 'Please Select',
      value: '',
    });

    return (
      <div>
        <div>
          <select id={forID} value={fieldValue || ''} onChange={this.handleChange}>
            {options.map((option, idx) => <option key={idx} value={option.value}>
              {option.label}
            </option>)}
          </select>
        </div>
        <div>
          {
            widget ?
              <div key={selectedName}>
                <div key={selectedName}>
                  <label htmlFor={selectedName}>{`${ field.get('label') } Data`}</label>
                  {
                    React.createElement(widget.control, {
                      id: selectedName,
                      field,
                      value: '',
                      onChange: (val, metadata) => {
                        onChange((value || Map()).set(selectedName, val), metadata);
                      },
                      onAddAsset,
                      onRemoveAsset,
                      getAsset,
                      forID: selectedName,
                    })
                  }
                </div>
              </div>
            :
              ''
          }
        </div>
        <div>
          {
            fieldValue === 'image' ?
              <div key={selectedNameAlt}>
                <div key={selectedNameAlt}>
                  <label htmlFor={selectedNameAlt}>{`${ field.get('label') } Data Alt`}</label>
                  <input type="text" id={selectedNameAlt} value={fieldValueSelectedAlt || ''} onChange={(e) => { this.altChange(selectedNameAlt, e.target.value) }}/>
                </div>
              </div>
            :
              ''
          }
        </div>
        <div>
          {
            fieldValue === 'string' ?
              <div key={selectedNameLink}>
                <div key={selectedNameLink}>
                  <label htmlFor={selectedNameLink}>{`${field.get('label')} Data Link`}</label>
                  <input type="text" id={selectedNameLink} value={fieldValueSelectedLink || ''} onChange={(e) => { this.linkChange(selectedNameLink, e.target.value) }} />
                </div>
              </div>
              :
              ''
          }
        </div>
      </div>
    );
  }
}

DynamicControl.propTypes = {
  onChange: PropTypes.func.isRequired,
  onAddAsset: PropTypes.func.isRequired,
  onRemoveAsset: PropTypes.func.isRequired,
  getAsset: PropTypes.func.isRequired,
  value: PropTypes.oneOfType([
    PropTypes.node,
    PropTypes.object,
    PropTypes.bool,
  ]),
  field: PropTypes.object,
  forID: PropTypes.string,
  dynamicWidgets: PropTypes.object
};