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gatsby-node.ts
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gatsby-node.ts
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import { GatsbyNode } from "gatsby";
import path from "path";
// Add custom fields.slug
// Use file name as slug's value, for nav list
export const onCreateNode: GatsbyNode["onCreateNode"] = ({
node,
actions,
getNode,
}) => {
const { createNodeField } = actions;
if (node.internal.type === "MarkdownRemark" && node.parent) {
const fileNode = getNode(node.parent);
if (fileNode) {
const name = fileNode.name as string;
createNodeField({
node,
name: "slug",
value: name == "index" ? "" : `${name}`,
});
}
}
};
interface MarkdownRemark {
id: string;
fields: {
slug: string;
};
frontmatter: {
title: string | null;
desc: string | null;
author: string | null;
};
html: string;
rawMarkdownBody: string;
}
interface MdxNode {
id: string;
fields: {
slug: string;
};
}
export const createPages: GatsbyNode["createPages"] = async ({
graphql,
actions,
}) => {
const { createPage } = actions;
const result = await graphql<{
allMarkdownRemark: { nodes: MarkdownRemark[] };
}>(
`
query AllMarkdownRemark {
allMarkdownRemark {
nodes {
id
frontmatter {
title
desc
author
}
html
rawMarkdownBody
fields {
slug
}
}
}
}
`
);
if (result.errors) {
throw result.errors;
}
// Collect nav data for display
const navList: {
route: string;
name: string;
target?: string;
}[] = [];
result.data?.allMarkdownRemark.nodes.forEach((v) => {
const route = !!v.fields.slug ? v.fields.slug : "/";
if (route == "/") {
navList.unshift({
route: "/",
name: "home",
});
} else {
navList.push({
route: `/${v.fields.slug}`,
name: route,
});
}
});
// Generate pages
result.data?.allMarkdownRemark.nodes.forEach((node) => {
const { fields } = node;
createPage({
path: !!fields.slug ? `/${fields.slug}` : "/",
// Custom pages' template
component: path.resolve("./src/templates/index.tsx"),
// pageContext
context: {
...node,
navList: navList,
redirect: false,
route: false,
},
});
});
};
interface CreatePageContext extends MarkdownRemark {
language: string;
i18n: {
language: string;
languages: string[];
defaultLanguage: string;
originalPath: string;
path: string;
};
}