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gatsby-node.ts
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gatsby-node.ts
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import path from 'path';
import type { GatsbyNode } from 'gatsby';
export const createSchemaCustomization: GatsbyNode['createSchemaCustomization'] =
({ actions }) => {
actions.createTypes(`
type Site {
siteMetadata: SiteMetadata!
}
type SiteMetadata {
lang: String!
title: String!
titleTemplate: String!
description: String!
siteUrl: String!
image: String!
twitterUsername: String!
}
type ArticlePageQuery {
mdx: Mdx!
}
type Mdx {
frontmatter: Frontmatter!
}
type Frontmatter {
title: String!
posted_at: String!
updated_at: String!
}
`);
};
export const createPages: GatsbyNode['createPages'] = async ({
actions,
graphql,
reporter,
}) => {
const { createPage } = actions;
const articleListTemplate = path.resolve('src/templates/articleList.tsx');
const tagTemplate = path.resolve('src/templates/tagPages.tsx');
const result: { errors?: unknown; data?: Queries.GatsbyNodeQuery } =
await graphql(`
query GatsbyNode {
postRemark: allMdx {
nodes {
slug
frontmatter {
tags
}
}
}
tagsGroup: allMdx {
group(field: frontmatter___tags) {
fieldValue
totalCount
}
}
}
`);
// handle errors
if (result.errors) {
reporter.panicOnBuild('Error while running GraphQL query.');
return;
}
const postsPerPage = 10;
// Make article pages
const posts = result?.data?.postRemark.nodes;
const totalPageNum = Math.ceil(posts?.length ?? 1 / postsPerPage);
Array.from({ length: totalPageNum }).forEach((_, i) => {
createPage({
path: i === 0 ? `/` : `/article/${i + 1}`,
component: articleListTemplate,
context: {
limit: postsPerPage,
skip: i * postsPerPage,
totalPageNum: totalPageNum,
currentPage: i + 1,
},
});
});
// Make tag pages
const tags = result?.data?.tagsGroup.group;
tags?.forEach((tag) => {
const totalPageNum = Math.ceil(tag.totalCount / postsPerPage);
Array.from({ length: totalPageNum }).forEach((_, i) => {
createPage({
path:
i === 0
? `/tag/${tag?.fieldValue ?? 'default'}/`
: `/tag/${tag?.fieldValue ?? 'default'}/${i + 1}`,
component: tagTemplate,
context: {
limit: postsPerPage,
skip: i * postsPerPage,
tag: tag.fieldValue,
totalPageNum: totalPageNum,
currentPage: i + 1,
},
});
});
});
};