Function saveFile

src/shared/preferences/PreferencesFile.ts:89–123

(filePath: string, data: AppPreferencesData, state: BackState)

  }

  export async function saveFile(filePath: string, data: AppPreferencesData, state: BackState): Promise<void> {
    const json = stringifyJsonDataFile(data);
    if (json.length === 0) {
      log.error('PreferencesFile', 'Serialized preferences string is empty, skipping write.');
      return;
    }
    const temp = await getTempFilename();
    const encoded = new TextEncoder().encode(json);
    await fs.promises.writeFile(temp, encoded);
    // Check: was it written correctly?
    let stat = await fs.promises.stat(temp);
    let count = 0;
    while (stat.size !== encoded.length) {
      if (count > 3) {
        log.error('PreferencesFile', 'Repeated failure to write preferences.');
        return fs.promises.unlink(temp);
      }
      await fs.promises.writeFile(temp, json);
      stat = await fs.promises.stat(temp);
      count++;
    }
    try {
      await fs.promises.rename(temp, filePath);
    } catch {
      try {
        await fs.promises.copyFile(temp, filePath);
        await fs.promises.unlink(temp);
      } catch (err) {
        log.error('Launcher', 'PARTICULARLY BAD ERROR: Failed to save temp file for Prefs correctly, requeued');
        state.prefsQueue.push(() => {
          PreferencesFile.saveFile(path.join(state.config.flashpointPath, PREFERENCES_FILENAME), state.preferences, state);
        });
      }
    }
  }
}