content: // Copyright (c) 2016 Yusuke Nunokawa (https://ynunokawa.github.io)
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  
  import React from 'react';
  import PointLegend from './PointLegend';
  import PolylineLegend from './PolylineLegend';
  import PolygonLegend from './PolygonLegend';
  
  class Legend extends React.Component {
    constructor (props) {
        super(props);
        this.layer = null;
    }
  
    shouldComponentUpdate (nextProps, nextState) {
      if (nextProps.layer.layer !== undefined) {
        return true;
      } else {
        return false;
      }
    }
  
    render () {
      if (this.props.layer.layer !== undefined) {
        if (this.props.layer.layer._cache !== undefined) {
          this.layer = this.props.layer.layer;
        } else {
          Object.keys(this.props.layer.layer._layers).map(function (k) {
            if (this.props.layer.layer._layers[k]._cache !== undefined) {
              this.layer = this.props.layer.layer._layers[k];
            }
          }.bind(this));
        }
        
        const renderer = this.layer.options.drawingInfo.renderer;
        let symbol;
  
        switch (renderer.type) {
          case 'classBreaks':
            symbol = renderer.classBreakInfos[0].symbol;
            break;
          case 'uniqueValue':
            symbol = renderer.uniqueValueInfos[0].symbol;
            break;
          default:
            symbol = renderer.symbol;
        }
  
        if (symbol.type === 'esriSMS' || symbol.type === 'esriPMS') {
          return (
            <PointLegend layer={this.props.layer} />
          );
        } else if (symbol.type === 'esriSLS') {
          return (
            <PolylineLegend layer={this.props.layer} />
          );
        } else if (symbol.type === 'esriSFS') {
          return (
            <PolygonLegend layer={this.props.layer} />
          );
        }
      } else {
        return false;
      }
    }
  }
  
  Legend.propTypes = {
    layer: React.PropTypes.object
  };
  
  Legend.displayName = 'Legend';
  
  export default Legend;
  