gatsby-node-copy-exmp.js

const _ = require("lodash");
const path = require("path");
const { createFilePath } = require("gatsby-source-filesystem");
const createPaginatedPages = require("gatsby-paginate");
const { fmImagesToRelative } = require("gatsby-remark-relative-images");

exports.createPages = ({ actions, graphql, arg }) => {
  const { createPage } = actions;

  return graphql(`
    {
      allMarkdownRemark(
        limit: 1000
        sort: { order: ASC, fields: [frontmatter___order] }
      ) {
        edges {
          node {
            excerpt(pruneLength: 60)
            id
            fields {
              slug
            }
            frontmatter {
              title
              templateKey
              hotProductsSelect
              tags
              categories
              cover {
                childImageSharp {
                  fluid(maxWidth: 233, maxHeight: 116, quality: 90) {
                    src
                    srcSet
                    sizes
                    base64
                    aspectRatio
                  }
                }
              }
              version {
                power
                price
              }
              vat
              date(formatString: "DD.MM.YYYY")
            }
          }
        }
      }
    }
  `).then(result => {
    if (result.errors) {
      result.errors.forEach(e => console.error(e.toString()));
      return Promise.reject(result.errors);
    }

    const posts = result.data.allMarkdownRemark.edges;
    const blogPosts = result.data.allMarkdownRemark.edges.filter(
      edge =>
        edge.node.frontmatter.templateKey === "article-page" ||
        edge.node.frontmatter.templateKey === "article-page2"
    );
    createPaginatedPages({
      edges: blogPosts,
      createPage: createPage,
      pageTemplate: "src/templates/blog.js",
      pageLength: 6, // This is optional and defaults to 10 if not used
      pathPrefix: "blog", // This is optional and defaults to an empty string if not used
      context: {}, // This is optional and defaults to an empty object if not used
    });

    const products = result.data.allMarkdownRemark.edges.filter(
      edge => edge.node.frontmatter.templateKey === "product-page"
    );
    createPaginatedPages({
      edges: products,
      createPage: createPage,
      pageTemplate: "src/templates/products.js",
      pageLength: 20, // This is optional and defaults to 10 if not used
      pathPrefix: "produkty", // This is optional and defaults to an empty string if not used
      context: {
        lastProducts: products.slice(0, 4),
        hotProducts: products
          .filter(
            product => product.node.frontmatter.hotProductsSelect === "tak"
          )
          .slice(0, 4),
      }, // This is optional and defaults to an empty object if not used
    });

    const productsByCategories = result.data.allMarkdownRemark.edges.filter(
      edge =>
        edge.node.frontmatter.templateKey === "product-page" &&
        edge.node.frontmatter.categories === "split"
    );
    createPaginatedPages({
      edges: productsByCategories,
      createPage: createPage,
      pageTemplate: "src/templates/categories.js",
      pageLength: 20, // This is optional and defaults to 10 if not used
      pathPrefix: "produkty/kategoria/split", // This is optional and defaults to an empty string if not used
      context: {
        lastProducts: products.slice(0, 4),
        hotProducts: products
          .filter(
            product => product.node.frontmatter.hotProductsSelect === "tak"
          )
          .slice(0, 4),
        test: arg,
      }, // This is optional and defaults to an empty object if not used
    });

    const multiSplitproducts = result.data.allMarkdownRemark.edges.filter(
      edge =>
        edge.node.frontmatter.templateKey === "product-page" &&
        edge.node.frontmatter.categories === "multi-split"
    );
    createPaginatedPages({
      edges: multiSplitproducts,
      createPage: createPage,
      pageTemplate: "src/templates/categories.js",
      pageLength: 20, // This is optional and defaults to 10 if not used
      pathPrefix: "produkty/kategoria/multi-split", // This is optional and defaults to an empty string if not used
      context: {
        lastProducts: products.slice(0, 4),
        hotProducts: products
          .filter(
            product => product.node.frontmatter.hotProductsSelect === "tak"
          )
          .slice(0, 4),
        test: arg,
      }, // This is optional and defaults to an empty object if not used
    });

    posts.forEach(edge => {
      // if (edge.node.frontmatter.templateKey === "products-page") {
      //   return;
      // }

      const id = edge.node.id;
      createPage({
        path: edge.node.fields.slug,
        tags: edge.node.frontmatter.tags,
        component: path.resolve(
          `src/templates/${String(edge.node.frontmatter.templateKey)}.js`
        ),
        // additional data can be passed via context
        context: {
          id,
          hotProducts: products
            .filter(
              product => product.node.frontmatter.hotProductsSelect === "tak"
            )
            .slice(0, 4),
          lastProducts: products.slice(0, 4),
          productCategories: products
            .filter(product => product.node.frontmatter.categories)
            .map((product, index) => product.node.frontmatter.categories)
            .reduce((a, b) => {
              if (a.indexOf(b) < 0) a.push(b);
              return a;
            }, []),
          poductsTitleList: products.map(
            product => product.node.frontmatter.title
          ),
        },
      });
    });

    // const productsPageContent = result.data.allMarkdownRemark.edges.filter(
    //   edge => edge.node.frontmatter.templateKey === "products-page"
    // );

    // productsPageContent.forEach(edge => {
    //   createPage({
    //     path: "/products",
    //     component: path.resolve(`src/templates/products-page.js`),
    //   });
    // });

    // Tag pages:
    let tags = [];
    // Iterate through each post, putting all found tags into `tags`
    posts.forEach(edge => {
      if (_.get(edge, `node.frontmatter.tags`)) {
        tags = tags.concat(edge.node.frontmatter.tags);
      }
    });
    // Eliminate duplicate tags
    tags = _.uniq(tags);

    // Make tag pages
    tags.forEach(tag => {
      const tagPath = `/tags/${_.kebabCase(tag)}/`;

      createPage({
        path: tagPath,
        component: path.resolve(`src/templates/tags.js`),
        context: {
          tag,
        },
      });
    });
  });
};

exports.onCreateNode = ({ node, actions, getNode }) => {
  const { createNodeField } = actions;
  fmImagesToRelative(node);
  if (node.internal.type === `MarkdownRemark`) {
    const value = createFilePath({ node, getNode });
    createNodeField({
      name: `slug`,
      node,
      value,
    });
  }
};