@jupl/gatsby-source-kentico-cloud/decorators/languageVariantsDecorator.js

Gatsby source plugin for Kentico Cloud

"use strict";

const _ = require('lodash');

const validation = require('../validation');
/**
 * Add Gatsby relations from item nodes to its other language variants.
 * @param {Array} defaultCultureContentItemNodes
 *  Gatsby content item nodes in default culture.
 * @param {Map<String, Array>} nonDefaultLanguageItemNodes
 *  Non-default gatsby content item nodes stored under the culture key.
 */


const decorateItemsWithLanguageVariants = (defaultCultureContentItemNodes, nonDefaultLanguageItemNodes) => {
  for (const [languageCodename, currentLanguageNodes] of nonDefaultLanguageItemNodes) {
    defaultCultureContentItemNodes.forEach(contentItemNode => {
      try {
        decorateItemNodeWithLanguageVariantLink(contentItemNode, currentLanguageNodes);
      } catch (error) {
        console.error(error);
      }
    });

    for (const [otherLanguageCodename, otherLanguageNodes] of nonDefaultLanguageItemNodes) {
      if (otherLanguageCodename !== languageCodename) {
        currentLanguageNodes.forEach(contentItemNode => {
          try {
            decorateItemNodeWithLanguageVariantLink(contentItemNode, otherLanguageNodes);
            decorateItemNodeWithLanguageVariantLink(contentItemNode, defaultCultureContentItemNodes);
          } catch (error) {
            console.error(error);
          }
        });
      }
    }
  }
};
/**
 * Adds links between a Gatsby content item node and its
 *    language variant nodes (translations).
 * @param {object} itemNode - Gatsby content item node.
 * @param {array} allNodesOfAnotherLanguage - The whole set of Gatsby item nodes
 *    of another language.
 * @throws {Error}
 */


const decorateItemNodeWithLanguageVariantLink = (itemNode, allNodesOfAnotherLanguage) => {
  validation.checkItemsObjectStructure([itemNode]);
  validation.checkItemsObjectStructure(allNodesOfAnotherLanguage);
  const languageVariantNode = allNodesOfAnotherLanguage.find(nodeOfSpecificLanguage => itemNode.system.codename === nodeOfSpecificLanguage.system.codename && itemNode.system.type === nodeOfSpecificLanguage.system.type && itemNode.system.language !== nodeOfSpecificLanguage.system.language);
  const otherLanguageLink = languageVariantNode && itemNode.otherLanguages___NODE.find(otherLanguageId => otherLanguageId === languageVariantNode.id);

  if (!otherLanguageLink && _.get(languageVariantNode, 'id')) {
    itemNode.otherLanguages___NODE.push(languageVariantNode.id);
  }
};

module.exports = {
  decorateItemsWithLanguageVariants
};