/
gatsby-node.js
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/
gatsby-node.js
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/**
* Implement Gatsby's Node APIs in this file.
*
* See: https://www.gatsbyjs.org/docs/node-apis/
*/
// eslint-disable-next-line @typescript-eslint/no-var-requires
const path = require("path");
// eslint-disable-next-line @typescript-eslint/no-var-requires
const { createFilePath } = require("gatsby-source-filesystem");
exports.onCreateNode = ({ node, actions, getNode }) => {
const { createNodeField } = actions;
if (node.internal.type === "Mdx") {
const value = createFilePath({ node, getNode });
createNodeField({
name: "slug",
node,
value,
});
}
};
function convertStringToSlug(s) {
return s.replace(" ", "-").toLowerCase();
}
exports.createPages = async ({ graphql, actions, reporter }) => {
const { createPage } = actions;
const result = await graphql(`
query {
allMdx {
edges {
node {
id
fileAbsolutePath
fields {
slug
}
frontmatter {
title
intro
tags
date
edit
}
body
tableOfContents
}
}
}
}
`);
if (result.errors) {
reporter.panicOnBuild('🚨 ERROR: Loading "createPages" query');
}
const pagesBlog = result.data.allMdx.edges;
const perPage = 10;
const numPages = Math.ceil(pagesBlog.length / perPage);
const tags = {};
pagesBlog.forEach(({ node }, index) => {
node.frontmatter.tags.forEach((t) => {
const slug = convertStringToSlug(t);
if (tags[slug]) {
tags[slug].count = tags[slug].count + 1;
tags[slug].posts = [...tags[slug].posts, node];
} else {
tags[slug] = {
count: 1,
posts: [node],
tag: t,
tagSlug: t,
};
}
});
createPage({
path: `/blog/post${node.fields.slug}`,
component: path.resolve(`./src/layouts/BlogDetail.tsx`),
context: {
id: node.id,
frontmatter: node.frontmatter,
mdxBody: node.body,
tableOfContents: node.tableOfContents,
},
});
});
Object.keys(tags).forEach((t) => {
const tagPages = Math.ceil(tags[t].count / perPage);
const tag = tags[t];
Array.from({ length: tagPages }).forEach((_, i) => {
createPage({
path: i === 0 ? `/blog/tag/${t}` : `/blog/tag/${t}/${i + 1}`,
component: path.resolve("./src/layouts/Blog.tsx"),
context: {
type: "tag",
tag: tag.tag,
tagSlug: tag.tagSlug,
limit: perPage,
skip: i * perPage,
numPages: Math.ceil(tags[t].count / perPage),
currentPage: i + 1,
},
});
});
});
Array.from({ length: numPages }).forEach((_, i) => {
createPage({
path: i === 0 ? `/blog` : `/blog/${i + 1}`,
component: path.resolve("./src/layouts/Blog.tsx"),
context: {
limit: perPage,
skip: i * perPage,
numPages,
currentPage: i + 1,
},
});
});
};