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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | 2x 2x 9x 9x 1x 8x 1x 7x 8x 8x 2x 6x 3x 6x 2x 4x 1x 6x 2x | const _ = require('lodash')
const esriExtent = require('esri-extent')
function renderCountAndExtentResponse (data, params) {
const {
returnCountOnly,
returnExtentOnly,
outSR
} = params
if (returnCountOnly && returnExtentOnly) {
return {
count: _.get(data, 'features.length', 0),
extent: getExtent(data, outSR)
}
}
if (returnCountOnly) {
return {
count: _.get(data, 'features.length', 0)
}
}
return {
extent: getExtent(data, outSR)
}
}
/**
* Get an extent object for passed GeoJSON
* @param {object} geojson
* @param {*} outSR Esri spatial reference object, or WKID integer
*/
function getExtent (geojson, outSR) {
// Calculate extent from features
const extent = esriExtent(geojson)
if (!outSR) {
return extent
}
// esri-extent assumes WGS84, but data passed in may have CRS.
// Math should be the same different CRS but we need to alter the spatial reference
if (_.isObject(outSR)) {
extent.spatialReference = outSR
}
if (Number.isInteger(Number(outSR))) {
extent.spatialReference = { wkid: Number(outSR) }
} else if (_.isString(outSR)) {
extent.spatialReference = { wkt: outSR }
}
return extent
}
module.exports = { renderCountAndExtentResponse }
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