1. /**
  2. * Merges multiple datasets for monitoring purposes with fallback logic.
  3. *
  4. * @param {...Array<Object>} datasets An array of datasets to merge. Each dataset is an array of objects.
  5. * @param {string} primaryKey The key to use as the primary key for merging.
  6. * @returns {Array<Object>} A merged dataset. Returns an empty array if no datasets are provided.
  7. */
  8. function mergeDatasets(datasets, primaryKey) {
  9. if (!datasets || datasets.length === 0) {
  10. return []; // Return empty array if no datasets are provided
  11. }
  13. const mergedDataset = [];
  15. for (const dataset of datasets) {
  16. if (!Array.isArray(dataset)) {
  17. console.warn("Skipping invalid dataset: Not an array.");
  18. continue; // Skip invalid datasets
  19. }
  21. for (const item of dataset) {
  22. if (typeof item !== 'object' || item === null) {
  23. console.warn("Skipping invalid item: Not an object.");
  24. continue; // Skip invalid items
  25. }
  26. if (!item.hasOwnProperty(primaryKey)) {
  27. console.warn(`Skipping item due to missing primary key: ${primaryKey}`);
  28. continue; // Skip items without the primary key
  29. }
  31. const key = item[primaryKey];
  32. let found = false;
  34. // Check if the item already exists in the merged dataset
  35. for (const existingItem of mergedDataset) {
  36. if (existingItem.hasOwnProperty(primaryKey) && existingItem[primaryKey] === key) {
  37. // Merge the items. Prioritize values from the later datasets.
  38. Object.assign(existingItem, item);
  39. found = true;
  40. break;
  41. }
  42. }
  44. if (!found) {
  45. mergedDataset.push(item);
  46. }
  47. }
  48. }
  50. return mergedDataset;
  51. }

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