featureserver
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*An open source implementation of the GeoServices specification*
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<h1><a href="../../../index.html">All files</a> / <a href="index.html">lib/helpers/fields</a> statistics-fields.js</h1>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">const { isDate } = require('../data-type-utils')
const { getEsriTypeFromDefinition } = require('./esri-type-utils')
const { ESRI_FIELD_TYPE_DATE } = require('./constants')
const {
StatisticField,
StatisticDateField,
FieldFromFieldDefinition,
FieldFromKeyValue
} = require('./field-classes')
class StatisticsFields {
static normalizeOptions (inputOptions = <span class="branch-0 cbranch-no" title="branch not covered" >{})</span> {
const {
statistics,
metadata: {
fields
} = {},
groupByFieldsForStatistics = [],
attributeSample,
...options
} = inputOptions
return {
statisticsSample: Array.isArray(statistics) ? statistics[0] : statistics,
fieldDefinitions: options.fieldDefinitions || options.fields || fields,
groupByFieldsForStatistics: Array.isArray(groupByFieldsForStatistics) ? groupByFieldsForStatistics : groupByFieldsForStatistics
.replace(/\s*,\s*/g, ',')
.replace(/^\s/, '')
.replace(/\s*$/, '')
.split(','),
...options
}
}
static create (inputOptions) {
const options = StatisticsFields.normalizeOptions(inputOptions)
return new StatisticsFields(options)
}
constructor (options = <span class="branch-0 cbranch-no" title="branch not covered" >{})</span> {
const {
statisticsSample,
groupByFieldsForStatistics = <span class="branch-0 cbranch-no" title="branch not covered" >[],</span>
fieldDefinitions = [],
outStatistics
} = options
const dateFieldRegexs = getDateFieldRegexs(fieldDefinitions, outStatistics)
this.fields = Object
.entries(statisticsSample)
.map(([key, value]) => {
if (groupByFieldsForStatistics.includes(key)) {
const fieldDefinition = fieldDefinitions.find(({ name }) => name === key)
<span class="missing-if-branch" title="if path not taken" >I</span>if (fieldDefinition) {
<span class="cstat-no" title="statement not covered" > return new FieldFromFieldDefinition(fieldDefinition)</span>
}
return new FieldFromKeyValue(key, value)
}
if (isDateField(dateFieldRegexs, key, value)) {
return new StatisticDateField(key)
}
return new StatisticField(key)
})
return this.fields
}
}
function isDateField (regexs, fieldName, value) {
return regexs.some(regex => {
return regex.test(fieldName)
}) || isDate(value)
}
function getDateFieldRegexs (fieldDefinitions = <span class="branch-0 cbranch-no" title="branch not covered" >[],</span> outStatistics = []) {
const dateFields = fieldDefinitions.filter(({ type }) => {
return getEsriTypeFromDefinition(type) === ESRI_FIELD_TYPE_DATE
}).map(({ name }) => name)
return outStatistics
.filter(({ onStatisticField }) => dateFields.includes(onStatisticField))
.map((statistic) => {
const {
onStatisticField,
outStatisticFieldName
} = statistic
const name = outStatisticFieldName || onStatisticField
const spaceEscapedName = name.replace(/\s/g, '_')
return new RegExp(`${spaceEscapedName}$`)
})
}
module.exports = StatisticsFields
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