1. /**
  2. * Nests log file structures with a timeout.
  3. *
  4. * @param {string} logFilePath - Path to the log file.
  5. * @param {number} timeout - Timeout in milliseconds.
  6. * @returns {Promise<object|null>} - A promise resolving to the nested structure, or null if timeout occurs.
  7. */
  8. async function nestLogFile(logFilePath, timeout) {
  9. return new Promise((resolve, reject) => {
  10. const startTime = Date.now();
  11. const fs = require('fs').promises; // Use promises-based fs module
  13. fs.readFile(logFilePath, 'utf8')
  14. .then(data => {
  15. // Simulate parsing and nesting (replace with actual parsing logic)
  16. const nestedData = parseLogData(data);
  17. resolve(nestedData);
  18. })
  19. .catch(err => {
  20. console.error("Error reading or parsing log file:", err);
  21. reject(err);
  22. })
  23. .finally(() => {
  24. if (Date.now() - startTime > timeout) {
  25. console.warn("Timeout occurred while processing log file.");
  26. resolve(null); // Resolve with null on timeout
  27. }
  28. });
  29. });
  30. }
  33. /**
  34. * Placeholder function for parsing log data into a nested structure.
  35. * Replace with your actual parsing logic.
  36. * @param {string} logData - The raw log data.
  37. * @returns {object} - The nested data structure.
  38. */
  39. function parseLogData(logData) {
  40. //Example: Simple parsing - splitting lines and creating an array of objects.
  41. const lines = logData.split('\n');
  42. const nestedArray = lines.map(line => {
  43. const [timestamp, message] = line.split(' | '); // Example split
  44. return {
  45. timestamp: timestamp,
  46. message: message
  47. };
  48. });
  49. return nestedArray;
  50. }
  55. //Example Usage (Uncomment to test)
  56. // nestLogFile('my_log_file.txt', 5000)
  57. // .then(nestedStructure => {
  58. // console.log('Nested Log Structure:', nestedStructure);
  59. // })
  60. // .catch(error => {
  61. // console.error('Error:', error);
  62. // });

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