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const { filterAndTransform } = require('./filter-and-transform')
const { logWarnings } = require('./log-warnings')
const { renderFeaturesResponse } = require('./render-features')
const { renderStatisticsResponse } = require('./render-statistics')
const { renderPrecalculatedStatisticsResponse } = require('./render-precalculated-statistics')
const { renderCountAndExtentResponse } = require('./render-count-and-extent')
const { getGeometryTypeFromGeojson } = require('../helpers')
function query (json, requestParams = {}) {
const {
features,
filtersApplied: {
all: skipFiltering
} = {}
} = json
const { f: requestedFormat } = requestParams
if (shouldRenderPrecalculatedData(json, requestParams)) {
return renderPrecalculatedData(json, requestParams)
}
const data = (skipFiltering || !features) ? json : filterAndTransform(json, requestParams)
if (shouldLogWarnings()) {
logWarnings(data, requestParams.f)
}
if (requestedFormat === 'geojson') {
return {
type: 'FeatureCollection',
features: data.features
}
}
return renderGeoservicesResponse(data, {
...requestParams,
attributeSample: _.get(json, 'features[0].properties'),
geometryType: getGeometryTypeFromGeojson(json)
})
}
function shouldRenderPrecalculatedData ({ statistics, count, extent }, { returnCountOnly, returnExtentOnly }) {
if (statistics) {
return true
}
if (returnCountOnly === true && count !== undefined && returnExtentOnly === true && extent) {
return true
}
if (returnCountOnly === true && count !== undefined && !returnExtentOnly) {
return true
}
if (returnExtentOnly === true && extent && !returnCountOnly) {
return true
}
return false
}
function renderPrecalculatedData (data, {
returnCountOnly,
returnExtentOnly,
outStatistics,
groupByFieldsForStatistics
}) {
const { statistics, count, extent } = data
if (statistics) {
return renderPrecalculatedStatisticsResponse(data, { outStatistics, groupByFieldsForStatistics })
}
const retVal = {}
if (returnCountOnly) {
retVal.count = count
}
if (returnExtentOnly) {
retVal.extent = extent
}
return retVal
}
function shouldLogWarnings () {
return process.env.NODE_ENV !== 'production' && process.env.KOOP_WARNINGS !== 'suppress'
}
function renderGeoservicesResponse (data, params = {}) {
const {
returnCountOnly,
returnExtentOnly,
returnIdsOnly,
outSR
} = params
if (returnCountOnly || returnExtentOnly) {
return renderCountAndExtentResponse(data, {
returnCountOnly,
returnExtentOnly,
outSR
})
}
if (returnIdsOnly) {
return renderIdsOnlyResponse(data)
}
if (data.statistics) {
return renderStatisticsResponse(data, params)
}
return renderFeaturesResponse(data, params)
}
function renderIdsOnlyResponse ({ features = [], metadata = {} }) {
const objectIdFieldName = metadata.idField || 'OBJECTID'
const objectIds = features.map(({ attributes }) => {
return attributes[objectIdFieldName]
})
return {
objectIdFieldName,
objectIds
}
}
module.exports = query
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