gatsby-node.js

const { tags, countries, devices, normalizeTag } = require('./src/util/stats');
const people = require('./src/data.js');

function unique(arr) {
  return Array.from(new Set(arr));
}

function sourceNodes({ actions, createNodeId, createContentDigest }) {
  const normalizedTagMap = tags().reduce((acc, tag) => {
    const normalizedTag = normalizeTag(tag.name);
    acc[normalizedTag] = tag.name;
    return acc;
  }, {});
  // Add People to the GraphQL API, we randomize the data on each build so no one gets their feelings hurt
  people
    .sort(() => Math.random() - 0.5)
    .forEach((person) => {
      const normalizedPerson = {
        ...person,
        // Clean out people that added basically the same tags twice
        tags: unique(
          person.tags.map((tag) => normalizedTagMap[normalizeTag(tag)] || tag)
        ),
      };
      const nodeMeta = {
        id: createNodeId(`person-${normalizedPerson.name}`),
        parent: null,
        children: [],
        internal: {
          type: `Person`,
          mediaType: `text/html`,
          content: JSON.stringify(normalizedPerson),
          contentDigest: createContentDigest(normalizedPerson),
        },
      };

      actions.createNode({ ...normalizedPerson, ...nodeMeta });
    });

  // Add tags to GraphQL API
  tags().forEach((tag) => {
    const nodeMeta = {
      id: createNodeId(`tag-${tag.name}`),
      parent: null,
      children: [],
      internal: {
        type: `Tag`,
        mediaType: `text/html`,
        content: JSON.stringify(tag),
        contentDigest: createContentDigest(tag),
      },
    };

    actions.createNode({ ...tag, ...nodeMeta });
  });

  // Add Countries to GraphQL API
  countries().forEach((country) => {
    const nodeMeta = {
      id: createNodeId(`country-${country.name}`),
      parent: null,
      children: [],
      internal: {
        type: `Country`,
        mediaType: `text/html`,
        content: JSON.stringify(country),
        contentDigest: createContentDigest(country),
      },
    };

    actions.createNode({ ...country, ...nodeMeta });
  });

  // Add Devices to GraphQL API
  devices().forEach((device) => {
    const nodeMeta = {
      id: createNodeId(`device-${device.name}`),
      parent: null,
      children: [],
      internal: {
        type: `device`,
        mediaType: `text/html`,
        content: JSON.stringify(device),
        contentDigest: createContentDigest(device),
      },
    };
    actions.createNode({ ...device, ...nodeMeta });
  });
}

exports.sourceNodes = sourceNodes;