Expo Config Plugin for bundling Realm DB file to iOS and Android

expo-realm-asset.js

/* eslint-disable @typescript-eslint/no-var-requires */
const path = require('path');
const fs = require('fs');
const {
  withXcodeProject,
  IOSConfig,
  withDangerousMod,
} = require('expo/config-plugins');

function withRealmAssetIos(config, fileArray) {
  return withXcodeProject(config, async (config) => {
    if (!Array.isArray(fileArray)) {
      fileArray = [fileArray];
    }
    for (const file of fileArray) {
      config.modResults = await setFileInXcodeProjectAsync({
        file,
        projectName: config.modRequest.projectName,
        project: config.modResults,
      });
    }
    return config;
  });
}

async function setFileInXcodeProjectAsync({ file, projectName, project }) {
  // Resource path relative to Xcode project root
  const filepath = path.join('../', file);
  if (!project.hasFile(filepath)) {
    // eslint-disable-next-line no-console
    console.log(`✔ [Realm-iOS] Adding ${filepath} as Resource`);

    IOSConfig.XcodeUtils.addResourceFileToGroup({
      filepath,
      groupName: projectName,
      project,
      isBuildFile: true,
    });
  }

  return project;
}

const androidFolderPath = 'app/src/main/assets';

const withRealmAssetAndroid = (expoConfig, fileArray) =>
  withDangerousMod(expoConfig, [
    'android',
    (modConfig) => {
      if (modConfig.modRequest.platform === 'android') {
        const androidAssetsPath = path.join(
          modConfig.modRequest.platformProjectRoot,
          androidFolderPath
        );
        if (!Array.isArray(fileArray)) {
          fileArray = [fileArray];
        }

        fileArray.forEach((file) => {
          const filepath = path.join(androidAssetsPath, path.basename(file));
          // eslint-disable-next-line no-console
          console.log(`✔ [Realm-Android] Adding ${file} to assets folder`);

          if (!fs.existsSync(path.dirname(filepath))) {
            fs.mkdirSync(path.dirname(filepath), { recursive: true });
          }

          fs.copyFileSync(file, filepath);
        });
      }
      return modConfig;
    },
  ]);

const withRealmAsset = (config, props) => {
  config = withRealmAssetIos(config, props);
  config = withRealmAssetAndroid(config, props);
  return config;
};

module.exports = withRealmAsset;