rxdb/dist/esm/plugins/backup/file-util.js

A local-first realtime NoSQL Database for JavaScript applications - https://rxdb.info/

import * as fs from 'node:fs';
import * as path from 'node:path';
import { blobToString, now } from "../../plugins/utils/index.js";

/**
 * ensure that the given folder exists
 */
export function ensureFolderExists(folderPath) {
  if (!fs.existsSync(folderPath)) {
    fs.mkdirSync(folderPath, {
      recursive: true
    });
  }
}

/**
 * deletes and recreates the folder
 */
export function clearFolder(folderPath) {
  deleteFolder(folderPath);
  ensureFolderExists(folderPath);
}
export function deleteFolder(folderPath) {
  // only remove if exists to not raise warning
  if (fs.existsSync(folderPath)) {
    fs.rmdirSync(folderPath, {
      recursive: true
    });
  }
}
export function prepareFolders(database, options) {
  ensureFolderExists(options.directory);
  var metaLoc = metaFileLocation(options);
  if (!fs.existsSync(metaLoc)) {
    var currentTime = now();
    var metaData = {
      createdAt: currentTime,
      updatedAt: currentTime,
      collectionStates: {}
    };
    fs.writeFileSync(metaLoc, JSON.stringify(metaData), 'utf-8');
  }
  Object.keys(database.collections).forEach(collectionName => {
    ensureFolderExists(path.join(options.directory, collectionName));
  });
}
export async function writeToFile(location, data) {
  if (typeof data !== 'string') {
    data = await blobToString(data);
  }
  return new Promise(function (res, rej) {
    fs.writeFile(location, data, 'utf-8', err => {
      if (err) {
        rej(err);
      } else {
        res();
      }
    });
  });
}
export function writeJsonToFile(location, data) {
  return writeToFile(location, JSON.stringify(data));
}
export function metaFileLocation(options) {
  return path.join(options.directory, 'backup_meta.json');
}
export function getMeta(options) {
  var loc = metaFileLocation(options);
  return new Promise((res, rej) => {
    fs.readFile(loc, 'utf-8', (err, data) => {
      if (err) {
        rej(err);
      } else {
        var metaContent = JSON.parse(data);
        res(metaContent);
      }
    });
  });
}
export function setMeta(options, meta) {
  var loc = metaFileLocation(options);
  return writeJsonToFile(loc, meta);
}
export function documentFolder(options, docId) {
  return path.join(options.directory, docId);
}
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