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gatsby-node.js
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gatsby-node.js
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const _ = require('lodash');
const path = require('path');
const { createFilePath } = require('gatsby-source-filesystem');
const { fmImagesToRelative } = require('gatsby-remark-relative-images');
const getFullSlug = (category, slug) => (category ? `${_.kebabCase(category)}${slug}` : slug);
exports.createPages = ({ actions, graphql }) => {
const { createPage } = actions;
return graphql(`
{
allMarkdownRemark(
limit: 1000
${
process.env.NODE_ENV === 'production'
? 'filter: {frontmatter: {draft: {ne: true}}}'
: ''
}
) {
edges {
node {
id
fields {
slug
fullTitle
}
frontmatter {
tags
category
templateKey
draft
}
}
}
}
}
`).then((result) => {
if (result.errors) {
result.errors.forEach((e) => console.error(e.toString()));
return Promise.reject(result.errors);
}
const posts = result.data.allMarkdownRemark.edges;
posts.forEach((edge) => {
const { id } = edge.node;
createPage({
path: edge.node.fields.slug,
tags: edge.node.frontmatter.tags,
component: path.resolve(
`src/templates/${String(edge.node.frontmatter.templateKey)}.js`,
),
// additional data can be passed via context
context: {
id,
},
});
});
// 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/${_.kebabCase(tag)}/`;
createPage({
path: tagPath,
component: path.resolve('src/templates/tags.js'),
context: {
tag,
},
});
});
createpageCateories(posts, createPage);
});
};
const createpageCateories = (posts, createPage) => {
// Tag pages:
let categories = [];
// Iterate through each post, putting all found tags into `tags`
posts.forEach((edge) => {
if (_.get(edge, 'node.frontmatter.category')) {
categories = categories.concat(edge.node.frontmatter.category);
}
});
// Eliminate duplicate tags
categories = _.uniq(categories);
// Make tag pages
categories.forEach((category) => {
const categoryPath = `/category/${_.kebabCase(category)}/`;
createPage({
path: categoryPath,
component: path.resolve('src/templates/category.js'),
context: {
category,
},
});
});
};
exports.onCreateNode = ({ node, actions, getNode }) => {
const { createNodeField } = actions;
fmImagesToRelative(node); // convert image paths for gatsby images
if (node.internal.type === 'MarkdownRemark') {
const category = _.get(getNode(node.id), ['frontmatter', 'category']);
const title = _.get(getNode(node.id), ['frontmatter', 'title']);
const titlePrefix = _.get(getNode(node.id), ['frontmatter', 'titlePrefix']);
const value = createFilePath({ node, getNode });
const fullSlug = getFullSlug(category, value);
createNodeField({
name: 'slug',
node,
value: fullSlug,
});
createNodeField({
name: 'fullTitle',
node,
value: titlePrefix ? `[${titlePrefix}] ${title}` : title,
});
}
};