gatsby/dist/utils/page-data.js

"use strict";

const fs = require(`fs-extra`);

const path = require(`path`);

const {
  store
} = require(`../redux`);

const getFilePath = ({
  publicDir
}, pagePath) => {
  const fixedPagePath = pagePath === `/` ? `index` : pagePath;
  return path.join(publicDir, `page-data`, fixedPagePath, `page-data.json`);
};

const read = async ({
  publicDir
}, pagePath) => {
  const filePath = getFilePath({
    publicDir
  }, pagePath);
  const rawPageData = await fs.readFile(filePath, `utf-8`);
  return JSON.parse(rawPageData);
};

const write = async ({
  publicDir
}, page, result) => {
  const filePath = getFilePath({
    publicDir
  }, page.path);
  const body = {
    componentChunkName: page.componentChunkName,
    path: page.path,
    matchPath: page.matchPath,
    result
  };
  const bodyStr = JSON.stringify(body); // transform asset size to kB (from bytes) to fit 64 bit to numbers

  const pageDataSize = Buffer.byteLength(bodyStr) / 1000;
  store.dispatch({
    type: `ADD_PAGE_DATA_STATS`,
    payload: {
      filePath,
      size: pageDataSize
    }
  });
  await fs.outputFile(filePath, bodyStr);
};

module.exports = {
  read,
  write
};
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