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gatsby-node.js
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gatsby-node.js
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const path = require("path");
const { createFilePath } = require(`gatsby-source-filesystem`);
const { createRemoteFileNode } = require(`gatsby-source-filesystem`);
const wrapper = promise =>
promise
.then(result => {
if (result.errors) {
throw result.errors
}
return { result, error: null }
})
.catch(error => ({ error, result: null }))
exports.onCreateWebpackConfig = ({ stage, loaders, actions }) => {
actions.setWebpackConfig({
resolve: {
modules: [path.resolve(__dirname, "src"), "node_modules"]
}
});
if (stage === "build-html" || stage === "develop-html") {
actions.setWebpackConfig({
module: {
rules: [
{
test: /react-audio-waveform/,
use: loaders.null()
},
{
test: /tone/,
use: loaders.null()
}
]
}
});
}
};
exports.createPages = async ({ graphql, actions }) => {
const { createPage } = actions;
const fragments = require("./src/queries/createPages");
const { result } = await wrapper(graphql(fragments.pages));
if (result.errors) throw result.errors;
const pages = [
{
component: require.resolve("./src/templates/project.jsx"),
edges: result.data.projects.edges
},
{
component: require.resolve("./src/templates/project.jsx"),
edges: result.data.billets.edges
},
{
component: require.resolve("./src/templates/letter.jsx"),
edges: result.data.letters.edges
},
{
component: require.resolve("./src/templates/playlist.jsx"),
edges: result.data.almusiqa.edges
}
];
pages.forEach(({ component, edges }) =>
edges.forEach((edge, index) => {
const previous =
index === edges.length - 1 ? null : edges[index + 1].node;
const next = index === 0 ? null : edges[index - 1].node;
const mbid =
edge.node.frontmatter && edge.node.frontmatter.mbid
? edge.node.frontmatter.mbid
: null;
createPage({
path: edge.node.fields.slug,
component: component,
context: {
mbid: mbid,
slug: edge.node.fields.slug,
previous,
next
}
});
})
);
};
const {
default_musicBrainzReleaseFields,
queryMusicBrainzRelease
} = require("./src/queries/musicbrainz");
exports.onCreateNode = async ({
node,
actions,
getNode,
createNodeId,
store,
cache
}) => {
const { createNodeField, createNode } = actions;
switch (node.internal.type) {
case `JavascriptFrontmatter`:
case `Mdx`:
createNodeField({
name: `slug`,
node,
value: createFilePath({ node, getNode })
});
const fileNode = getNode(node.parent);
createNodeField({
name: "sourceInstanceName",
node,
value: fileNode.sourceInstanceName
});
let release_fields = [];
if (fileNode.sourceInstanceName == `almusiqa`) {
// Retrieve MusicBrainz Ids from frontmatter post
const mbids = Array.isArray(node.frontmatter.mbid)
? node.frontmatter.mbid
: [node.frontmatter.mbid];
// Query MusicBrainz API to source album information for each ID
await Promise.all(
mbids.map(async mbid => {
const { result } = await wrapper(queryMusicBrainzRelease(mbid));
// Download covers and create dedicated node
const coverFileNode = await createRemoteFileNode({
url: result.lookup.release.coverArtArchive.front,
store,
cache,
createNode,
createNodeId
});
if (coverFileNode) {
coverFileNode.parent = node.id;
actions.createParentChildLink({
parent: node,
child: coverFileNode
});
// Add results to a field of Mdx node + a link to cover file
release_fields.push({
...default_musicBrainzReleaseFields,
...result.lookup.release,
cover___NODE: coverFileNode.id
});
} else {
console.warn("Cover not downloaded");
release_fields.push({
...default_musicBrainzReleaseFields,
...result.lookup.release
});
}
})
).catch(err => {
console.log(err);
throw err;
});
}
// Add everything into a node field named graphbrainz__release
createNodeField({
name: "graphbrainz__release",
node,
value: release_fields
});
}
};