|
| 1 | +import 'package:flutter_news_app_api_server_full_source_code/src/database/migration.dart'; |
| 2 | +import 'package:logging/logging.dart'; |
| 3 | +import 'package:mongo_dart/mongo_dart.dart'; |
| 4 | + |
| 5 | +/// Migration to add the `savedFiltersLimit` fields to existing |
| 6 | +/// `remote_configs` documents within the `userPreferenceConfig` sub-document. |
| 7 | +class AddSavedFiltersToRemoteConfig extends Migration { |
| 8 | + /// {@macro add_saved_filters_to_remote_config} |
| 9 | + AddSavedFiltersToRemoteConfig() |
| 10 | + : super( |
| 11 | + prDate: '20251013000057', |
| 12 | + prId: '57', |
| 13 | + prSummary: |
| 14 | + 'This pull request introduces the ability for users to save and manage custom filter combinations for news headlines. It achieves this by adding a new SavedFilter data model, integrating it into the existing user content preferences, and implementing configurable limits for these saved filters based on user tiers', |
| 15 | + ); |
| 16 | + |
| 17 | + @override |
| 18 | + Future<void> up(Db db, Logger log) async { |
| 19 | + final collection = db.collection('remote_configs'); |
| 20 | + final result = await collection.updateMany( |
| 21 | + // Filter for documents where 'userPreferenceConfig.guestSavedFiltersLimit' does not exist. |
| 22 | + // This assumes if one is missing, all are likely missing. |
| 23 | + where.notExists('userPreferenceConfig.guestSavedFiltersLimit'), |
| 24 | + // Set 'guestSavedFiltersLimit', 'authenticatedSavedFiltersLimit', |
| 25 | + // and 'premiumSavedFiltersLimit' to a default value. |
| 26 | + modify |
| 27 | + .set('userPreferenceConfig.guestSavedFiltersLimit', 3) |
| 28 | + .set('userPreferenceConfig.authenticatedSavedFiltersLimit', 10) |
| 29 | + .set('userPreferenceConfig.premiumSavedFiltersLimit', 25), |
| 30 | + ); |
| 31 | + log.info( |
| 32 | + 'Updated ${result.nModified} documents in remote_configs ' |
| 33 | + 'to include savedFiltersLimit fields.', |
| 34 | + ); |
| 35 | + } |
| 36 | + |
| 37 | + @override |
| 38 | + Future<void> down(Db db, Logger log) async { |
| 39 | + final collection = db.collection('remote_configs'); |
| 40 | + await collection.updateMany( |
| 41 | + where.exists('userPreferenceConfig.guestSavedFiltersLimit'), |
| 42 | + modify |
| 43 | + .unset('userPreferenceConfig.guestSavedFiltersLimit') |
| 44 | + .unset('userPreferenceConfig.authenticatedSavedFiltersLimit') |
| 45 | + .unset('userPreferenceConfig.premiumSavedFiltersLimit'), |
| 46 | + ); |
| 47 | + log.info( |
| 48 | + 'Removed "savedFiltersLimit" fields from remote_configs ' |
| 49 | + 'userPreferenceConfig sub-document.', |
| 50 | + ); |
| 51 | + } |
| 52 | +} |
0 commit comments