wikibase-cli/lib/get_sitelink_url.js

A command-line interface to Wikibase

import errors_ from '#lib/errors'
import { exitOnMissingInstance } from '#lib/exit_on_missing'
import { get } from '#lib/request'
import { getWbk } from '#lib/wbk'

export function getSitelinkUrlFactory (program) {
  exitOnMissingInstance(program.instance)
  const { getEntities } = getWbk(program)
  return async function (id, lang, sitelinkSuffix) {
    if (id[0] === 'P') {
      console.error("Wikibase properties don't have sitelinks")
      process.exit(1)
    }

    const url = getEntities({ ids: id, props: [ 'sitelinks' ] })

    const { entities } = await get(url)
    const entity = entities[id]
    if (!entity || entity.missing === '') throw errors_.new('entity not found', { id, lang, sitelinkSuffix })
    const sitelink = entity.sitelinks[`${lang}${sitelinkSuffix}`]
    if (!sitelink) throw errors_.new('sitelink not found', { id, lang, sitelinkSuffix })
    const domain = sitelinkDomain[sitelinkSuffix]
    const formattedTitle = formatTitle(sitelink.title)
    return `https://${lang}.${domain}/wiki/${formattedTitle}`
  }
}

const sitelinkDomain = {
  wiki: 'wikipedia.org',
}

const formatTitle = title => {
  title = title.replace(/\s/g, '_')
  return fixedEncodeURIComponent(title)
}

// encodeURIComponent ignores !, ', (, ), and *
// cf https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent#Description
const fixedEncodeURIComponent = str => {
  return encodeURIComponent(str).replace(/[!'()*]/g, encodeCharacter)
}

const encodeCharacter = c => '%' + c.charCodeAt(0).toString(16)