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gatsby-node.js
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gatsby-node.js
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const path = require(`path`)
exports.onCreateNode = ({ node, getNode, actions }) => {
const { createNodeField } = actions
if (node.internal.type === `Mdx`) {
const parent = getNode(node.parent)
let value = parent.relativePath.replace(parent.ext, '')
if (value === 'index') {
value = ''
}
createNodeField({
node,
name: `slug`,
value: `/${value}`,
})
createNodeField({
node,
name: 'id',
value: node.id,
})
createNodeField({
node,
name: 'modSlug',
value: `/${value.replace('/index', '')}`,
})
}
}
exports.createPages = ({ graphql, actions }) => {
const { createPage, createRedirect } = actions
const getTitle = (frontmatter, lang, db) => {
let pageSeoTitle = frontmatter.metaTitle || frontmatter.title
if (lang || db) {
const queryParam = `${lang ? `${lang}${db ? '-' : ''}` : ''}${db ? `${db}` : ''}`
const titleEntry = frontmatter.techMetaTitles
? frontmatter.techMetaTitles.find(item => item.name === queryParam)
: null
pageSeoTitle = titleEntry ? titleEntry.value : pageSeoTitle
}
return pageSeoTitle
}
const getDesc = (frontmatter, lang, db) => {
let pageSeoDesc = frontmatter.metaDescription || frontmatter.title
if (lang || db) {
const queryParam = `${lang ? `${lang}${db ? '-' : ''}` : ''}${db ? `${db}` : ''}`
const descEntry = frontmatter.techMetaDescriptions
? frontmatter.techMetaDescriptions.find(item => item.name === queryParam)
: null
pageSeoDesc = descEntry ? descEntry.value : pageSeoDesc
}
return pageSeoDesc
}
return new Promise((resolve, reject) => {
graphql(`
{
allMdx {
edges {
node {
fields {
slug
id
modSlug
}
frontmatter {
title
metaTitle
metaDescription
langSwitcher
dbSwitcher
techMetaTitles {
name
value
}
techMetaDescriptions {
name
value
}
}
body
parent {
... on File {
relativePath
}
}
}
}
}
site {
siteMetadata {
redirects {
from
to
}
}
}
}
`).then(result => {
result.data.allMdx.edges.forEach(({ node }) => {
const { langSwitcher, dbSwitcher } = node.frontmatter
if (langSwitcher && dbSwitcher) {
langSwitcher.forEach(lang =>
dbSwitcher.forEach(db => {
createPage({
path: `${node.fields.modSlug.replace(/\d{2,}-/g, '')}-${lang}-${db}`,
component: path.resolve(`./src/layouts/articleLayout.tsx`),
context: {
id: node.fields.id,
seoTitle: getTitle(node.frontmatter, lang, db),
seoDescription: getDesc(node.frontmatter, lang, db),
},
})
})
)
} else if (langSwitcher && !dbSwitcher) {
langSwitcher.forEach(lang =>
createPage({
path: `${node.fields.modSlug.replace(/\d{2,}-/g, '')}-${lang}`,
component: path.resolve(`./src/layouts/articleLayout.tsx`),
context: {
id: node.fields.id,
seoTitle: getTitle(node.frontmatter, lang, null),
seoDescription: getDesc(node.frontmatter, lang, null),
},
})
)
} else if (!langSwitcher && dbSwitcher) {
node.frontmatter.dbSwitcher.forEach(db =>
createPage({
path: `${node.fields.modSlug.replace(/\d{2,}-/g, '')}-${db}`,
component: path.resolve(`./src/layouts/articleLayout.tsx`),
context: {
id: node.fields.id,
seoTitle: getTitle(node.frontmatter, null, db),
seoDescription: getDesc(node.frontmatter, null, db),
},
})
)
} else if (!langSwitcher && !dbSwitcher) {
createPage({
path: node.fields.modSlug ? node.fields.modSlug.replace(/\d{2,}-/g, '') : '/',
component: path.resolve(`./src/layouts/articleLayout.tsx`),
context: {
id: node.fields.id,
seoTitle: getTitle(node.frontmatter),
seoDescription: getDesc(node.frontmatter),
},
})
}
})
resolve()
const redirects = result.data.site.siteMetadata.redirects
redirects.map(redirect =>
createRedirect({
fromPath: redirect.from,
toPath: redirect.to,
statusCode: 301,
})
)
})
})
}
exports.onCreateWebpackConfig = ({ actions }) => {
actions.setWebpackConfig({
resolve: {
modules: [path.resolve(__dirname, 'src'), 'node_modules'],
alias: {
$components: path.resolve(__dirname, 'src/components'),
buble: '@philpl/buble', // to reduce bundle size
},
},
})
}