pg-rdf-to-json/dist/formatters/formatAgent.js

Transforms RDF files from rdf-files.tar.bz2 provided by Project Gutenberg into JS/JSON objects.

import { relators } from '../input-schemas/relators.js';
import formatObject from './formatObject.js';
import formatValue from './formatValue.js';
const sharedRelators = new WeakMap();
export default function formatAgent(key, value, path, original) {
    if (typeof value !== 'object') {
        throw new TypeError(`Expected object at ${path}`);
    }
    const keys = Object.keys(value);
    let formattedRelator;
    if (keys[0] === 'agent') {
        formattedRelator = formatValue(keys[0], value[keys[0]], `${path}.${keys[0]}`, original);
    }
    else if (keys.includes('resource')) {
        formattedRelator = formatObject(key, value, path, original);
    }
    else {
        return formatObject(key, value, path, original);
    }
    if (relators.has(key)) {
        formattedRelator.codes = [key];
    }
    else if (key.endsWith('creator')) {
        formattedRelator.codes = ['cre'];
    }
    if (sharedRelators.has(original)) {
        sharedRelators.get(original)?.push(formattedRelator);
    }
    else {
        sharedRelators.set(original, [formattedRelator]);
    }
    return formattedRelator;
}
export function postProcessRelators(newObject, original) {
    const relators = sharedRelators.get(original);
    newObject.rdf.ebook.relators = [];
    if (Array.isArray(relators)) {
        for (const relator of relators) {
            if (Array.isArray(relator.codes)) {
                const toDelete = relator.codes
                    .map((c) => c === 'cre' ? 'creator' : c);
                if (Object.hasOwn(relator, 'resource')) {
                    const original = relators.find((r) => {
                        return r.about === relator.resource;
                    });
                    if (original) {
                        original.codes.push(...relator.codes);
                    }
                }
                else {
                    newObject.rdf.ebook.relators.push(relator);
                }
                for (const code of toDelete) {
                    delete newObject.rdf.ebook[code];
                }
            }
        }
        sharedRelators.delete(original);
    }
}
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