113 lines
2.8 KiB
JavaScript
113 lines
2.8 KiB
JavaScript
const path = require(`path`)
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const _ = require('lodash')
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const { createFilePath } = require(`gatsby-source-filesystem`)
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exports.createPages = ({ graphql, actions }) => {
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const { createPage } = actions
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const blogPost = path.resolve(`./src/templates/blog-post.js`)
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const tagTemplate = path.resolve(`./src/templates/tags.js`)
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return graphql(
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`
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{
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allMarkdownRemark(
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sort: { fields: [frontmatter___date], order: DESC }
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limit: 1000
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) {
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edges {
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node {
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fields {
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slug
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}
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frontmatter {
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title
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tags
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img {
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childImageSharp {
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gatsbyImageData(placeholder: BLURRED, layout: FULL_WIDTH)
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}
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}
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}
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}
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}
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}
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}
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`
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).then((result) => {
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if (result.errors) {
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throw result.errors
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}
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// Create blog posts pages.
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const posts = result.data.allMarkdownRemark.edges
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posts.forEach((post, index) => {
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const previous = index === posts.length - 1 ? null : posts[index + 1].node
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const next = index === 0 ? null : posts[index - 1].node
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createPage({
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path: post.node.fields.slug,
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component: blogPost,
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context: {
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slug: post.node.fields.slug,
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previous,
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next,
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},
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})
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})
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// Create blog post list pages
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const postsPerPage = 10
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const numPages = Math.ceil(posts.length / postsPerPage)
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Array.from({ length: numPages }).forEach((_, i) => {
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createPage({
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path: i === 0 ? `/` : `/${i + 1}`,
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component: path.resolve('./src/templates/blog-list.js'),
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context: {
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limit: postsPerPage,
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skip: i * postsPerPage,
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numPages,
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currentPage: i + 1,
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},
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})
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})
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// create Tags pages
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// pulled directly from https://www.gatsbyjs.org/docs/adding-tags-and-categories-to-blog-posts/#add-tags-to-your-markdown-files
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let tags = []
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// Iterate through each post, putting all found tags into `tags`
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_.each(posts, (edge) => {
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if (_.get(edge, 'node.frontmatter.tags')) {
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tags = tags.concat(edge.node.frontmatter.tags)
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}
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})
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// Eliminate duplicate tags
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tags = _.uniq(tags)
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// Make tag pages
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tags.forEach((tag) => {
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createPage({
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path: `/tags/${_.kebabCase(tag)}/`,
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component: tagTemplate,
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context: {
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tag,
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},
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})
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})
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})
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}
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exports.onCreateNode = ({ node, actions, getNode }) => {
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const { createNodeField } = actions
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if (node.internal.type === `MarkdownRemark`) {
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const value = createFilePath({ node, getNode })
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createNodeField({
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name: `slug`,
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node,
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value,
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})
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}
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}
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