generate-renderer create-symbol.js

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  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)
}