wikibase-edit/dist/src/lib/resolve_title.js

Edit Wikibase from NodeJS

// A module that turns entity ids into full mediawiki page titles, by checking
// the Wikibase custom namespace configuration
// ex: P1 => Property:P1, Q1 => Q1 OR Item:Q1
import { isEntityId } from 'wikibase-sdk';
import { newError } from './error.js';
import { getJson } from './request/get_json.js';
let prefixesMapPromise;
export async function resolveTitle(title, instanceApiEndpoint) {
    if (!isEntityId(title))
        throw newError('expected entity id as title');
    prefixesMapPromise = prefixesMapPromise || getPrefixesMap(instanceApiEndpoint);
    const prefixesMap = await prefixesMapPromise;
    const idFirstLetter = title[0];
    const prefix = prefixesMap[idFirstLetter];
    return (prefix === '' ? title : `${prefix}:${title}`);
}
async function getPrefixesMap(instanceApiEndpoint) {
    const infoUrl = `${instanceApiEndpoint}?action=query&meta=siteinfo&siprop=namespaces&format=json`;
    const res = await getJson(infoUrl);
    return parsePrefixesMap(res);
}
function parsePrefixesMap(res) {
    return Object.values(res.query.namespaces)
        .filter(namespace => namespace.defaultcontentmodel)
        .filter(namespace => namespace.defaultcontentmodel.startsWith('wikibase'))
        .reduce(aggregatePrefixes, {});
}
function aggregatePrefixes(prefixesMap, namespace) {
    const { defaultcontentmodel, '*': prefix } = namespace;
    const type = defaultcontentmodel.split('-')[1];
    const firstLetter = type === 'item' ? 'Q' : type[0].toUpperCase();
    prefixesMap[firstLetter] = prefix;
    return prefixesMap;
}
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