wikidata-jskos/lib/queries/get-mappings-from.js

Access Wikidata in JSKOS format

import { httpRequest } from "../request.js"
import WDK from "../wdk.js"
import { mapLabels, mapMappingClaims } from "../mappers.js"
import { detectWikidataConcepts } from "../utils.js"

const { getEntities } = WDK

export default async function getMappingsFrom(args, schemes) {
  let { from, to, fromScheme, toScheme, languages } = args

  from = detectWikidataConcepts(from)
  if (!from.length) {
    return []
  }

  if (fromScheme && fromScheme !== "http://bartoc.org/en/node/1940") {
    return []
  }

  if (toScheme) {
    schemes = schemes.filter(scheme => scheme.uri === toScheme)
    if (schemes.isEmpty()) {
      return []
    }
  }

  const qids = from.map(concept => concept.notation[0])
  const props = languages.length ? ["claims", "labels"] : ["claims"]
  const url = getEntities({
    ids: qids,
    languages,
    props,
  })

  return httpRequest(url)
    .then(res => res.entities || [])
    .then(res => {
      const mappings = []

      from.forEach(fromConcept => {

        let entity = res[fromConcept.notation[0]]
        if (entity) {
          Object.assign(fromConcept, mapLabels(entity.labels))
          const claims = entity.claims || {}
          mappings.push(...mapMappingClaims(claims, { from: fromConcept, schemes, to }))
        }
      })

      return mappings
    })
}