maputnik/src/components/map/FeaturePropertyPopup.jsx

import React from 'react'
import PropTypes from 'prop-types'
import InputBlock from '../inputs/InputBlock'
import StringInput from '../inputs/StringInput'

function displayValue(value) {
  if (typeof value === 'undefined' || value === null) return value;
  if (value instanceof Date) return value.toLocaleString();
  if (typeof value === 'object' ||
          typeof value === 'number' ||
          typeof value === 'string') return value.toString();
  return value;
}

function renderProperties(feature) {
  return Object.keys(feature.properties).map(propertyName => {
    const property = feature.properties[propertyName]
    return <InputBlock key={propertyName} label={propertyName}>
      <StringInput value={displayValue(property)} style={{backgroundColor: 'transparent'}}/>
    </InputBlock>
  })
}

function renderFeature(feature) {
  return <div key={`${feature.sourceLayer}-${feature.id}`}>
    <div className="maputnik-popup-layer-id">{feature.layer['source-layer']}{feature.inspectModeCounter && <span> × {feature.inspectModeCounter}</span>}</div>
    <InputBlock key={"property-type"} label={"$type"}>
      <StringInput value={feature.geometry.type} style={{backgroundColor: 'transparent'}} />
    </InputBlock>
    {renderProperties(feature)}
  </div>
}

function removeDuplicatedFeatures(features) {
  let uniqueFeatures = [];

  features.forEach(feature => {
    const featureIndex = uniqueFeatures.findIndex(feature2 => {
      return feature.layer['source-layer'] === feature2.layer['source-layer'] 
        && JSON.stringify(feature.properties) === JSON.stringify(feature2.properties)
    })

    if(featureIndex === -1) {
      uniqueFeatures.push(feature)
    } else {
      if(uniqueFeatures[featureIndex].hasOwnProperty('inspectModeCounter')) {
        uniqueFeatures[featureIndex].inspectModeCounter++
      } else {
        uniqueFeatures[featureIndex].inspectModeCounter = 2
      }
    }
  })

  return uniqueFeatures
}

class FeaturePropertyPopup extends React.Component {
  static propTypes = {
    features: PropTypes.array
  }

  render() {
    const features = removeDuplicatedFeatures(this.props.features)
    return <div className="maputnik-feature-property-popup">
      {features.map(renderFeature)}
    </div>
  }
}


export default FeaturePropertyPopup