gatsby-node.js

/* eslint-env node */
const DEFAULT_LANG_KEY = 'en'

function getLangKey(node) {
  const matches = node.fileAbsolutePath.match(/\.([a-z]{2})\.md/)
  if (!matches) return DEFAULT_LANG_KEY
  return matches[1]
}

function getPath(node) {
  if (node.fields.langKey === DEFAULT_LANG_KEY)
    return `/blog/${node.frontmatter.slug}`
  return `/${node.fields.langKey}/blog/${node.frontmatter.slug}`
}

exports.onCreateNode = ({ node, actions }) => {
  const { createNodeField } = actions
  if (node.internal.type === 'Mdx') {
    const langKey = getLangKey(node)
    createNodeField({
      node,
      name: `langKey`,
      value: langKey,
    })
    createNodeField({
      node,
      name: `slug`,
      value: node.frontmatter.slug,
    })
    createNodeField({
      node,
      name: `link`,
      value: getPath({ ...node, fields: { langKey } }),
    })
    createNodeField({
      node,
      name: `editLink`,
      value: `https://github.com/gregberge/gregberge.com/edit/master${node.fileAbsolutePath.replace(
        __dirname,
        '',
      )}`,
    })
  }
}

exports.createPages = async ({ graphql, actions }) => {
  const { createPage } = actions
  const result = await graphql(
    `
      {
        allMdx {
          edges {
            node {
              id
              fileAbsolutePath
              fields {
                langKey
              }
              frontmatter {
                slug
              }
            }
          }
        }
      }
    `,
  )

  if (result.errors) {
    console.log(result.errors) // eslint-disable-line no-console
    throw new Error('Error during page creation')
  }

  // Create blog posts pages.
  result.data.allMdx.edges.forEach(({ node }) => {
    createPage({
      path: getPath(node),
      component: require.resolve('./src/templates/post.js'),
      context: {
        id: node.id,
        slug: node.frontmatter.slug,
        langKey: node.fields.langKey,
      },
    })
  })
}

// exports.sourceNodes = ({ actions }) => {
//   const { createTypes } = actions
//   const typeDefs = `
//     type MdxFrontmatter {
//       banner: File
//     }
//   `
//   createTypes(typeDefs)
// }