const path = require(`path`)
const { createFilePath } = require(`gatsby-source-filesystem`)

var XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest;
global.XMLHttpRequest = XMLHttpRequest;

exports.onCreateNode = ({ node, getNode, actions }) => {
  const { createNodeField } = actions
  if (node.internal.type === 'MarkdownRemark') {
    const slug = createFilePath({ node, getNode, basePath: 'pages/posts' })
    createNodeField({
      node,
      name: 'slug',
      value: slug,
    });
  }
}

exports.createPages = ({ graphql, actions }) => {
  const { createPage } = actions
  return new Promise((resolve, reject) => {
    graphql(`
    {
      allMarkdownRemark {
        edges {
          node {
            fields {
              slug
            }
          }
        }
      }
    }
   `).then(result => {
      result.data.allMarkdownRemark.edges.forEach(({ node }) => {
        createPage({
          path: node.fields.slug,
          component: path.resolve(`./src/templates/blog-post.js`),
          context: {
            slug: node.fields.slug,
          },
        })
      })
      resolve()
    })
  })
}