featureserver/lib/generate-renderer/create-symbol.js

*An open source implementation of the GeoServices specification*

const {
  PointRenderer,
  LineRenderer,
  PolygonRenderer
} = require('../helpers')
const { CodedError } = require('../helpers/errors')

module.exports = { createSymbol }

function createSymbol (baseSymbol, color, geomType) {
  const symbol = baseSymbol || getDefaultSymbol(geomType)
  return { ...symbol, color }
}

function getDefaultSymbol (geomType) {
  const { symbol } = getSymbolRenderer(geomType)
  return symbol
}

function getSymbolRenderer (geomType) {
  if (geomType === 'esriGeometryPoint' || geomType === 'esriGeometryMultiPoint') {
    return new PointRenderer()
  }

  if (geomType === 'esriGeometryPolyline') {
    return new LineRenderer()
  }

  if (geomType === 'esriGeometryPolygon') {
    return new PolygonRenderer()
  }

  throw new CodedError('Dataset geometry type is not supported for renderers.', 400)
}