impress-2020/scripts/build-cached-data.js

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// We run this on build to cache some stable database tables into the JS
// bundle!
const fs = require("fs").promises;
const path = require("path");
const connectToDb = require("../src/server/db");
const { normalizeRow } = require("../src/server/util");
const cachedDataPath = path.join(__dirname, "..", "src", "app", "cached-data");
async function buildZonesCache(db) {
const [rows] = await db.query(
`SELECT z.id, z.depth, zt.label FROM zones z ` +
`INNER JOIN zone_translations zt ON z.id = zt.zone_id ` +
`WHERE locale = "en" ORDER BY z.id;`
);
const entities = rows.map(normalizeRow);
const filePath = path.join(cachedDataPath, "zones.json");
fs.writeFile(filePath, JSON.stringify(entities, null, 4), "utf8");
console.log(`📚 Wrote zones to ${path.relative(process.cwd(), filePath)}`);
}
async function main() {
const db = await connectToDb();
await fs.mkdir(cachedDataPath, { recursive: true });
try {
await buildZonesCache(db);
} catch (e) {
db.close();
throw e;
}
db.close();
}
main().catch((e) => {
console.error(e);
process.exitCode = 1;
});