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fix: 5554 - display of cached counts on user page (#5573)
New files: * `lazy_counter.dart`: Lazy Counter, with a cached value stored locally, and a call to the server. * `lazy_counter_widget.dart`: Widget displaying a Lazy Counter: cached value, refresh button, and loading. Impacted files: * `user_preferences.dart`: added methods about storing a lazy count value * `user_preferences_account.dart`: refactored the display of counts with the new `LazyCounter` and `LazyCounterWidget` classes
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93 changes: 93 additions & 0 deletions
93
packages/smooth_app/lib/pages/preferences/lazy_counter.dart
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| import 'package:flutter/foundation.dart'; | ||
| import 'package:openfoodfacts/openfoodfacts.dart'; | ||
| import 'package:smooth_app/data_models/preferences/user_preferences.dart'; | ||
| import 'package:smooth_app/query/paged_user_product_query.dart'; | ||
| import 'package:smooth_app/query/product_query.dart'; | ||
| import 'package:smooth_app/services/smooth_services.dart'; | ||
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| /// Lazy Counter, with a cached value stored locally, and a call to the server. | ||
| abstract class LazyCounter { | ||
| const LazyCounter(); | ||
|
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| /// Returns the value cached locally; | ||
| int? getLocalCount(final UserPreferences userPreferences) => | ||
| userPreferences.getLazyCount(getSuffixTag()); | ||
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| /// Sets the value cached locally; | ||
| Future<void> setLocalCount( | ||
| final int value, | ||
| final UserPreferences userPreferences, | ||
| ) => | ||
| userPreferences.setLazyCount(value, getSuffixTag()); | ||
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| /// Returns the suffix tag used to cache the value locally; | ||
| @protected | ||
| String getSuffixTag(); | ||
|
|
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| /// Gets the latest value from the server. | ||
| Future<int?> getServerCount(); | ||
| } | ||
|
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| /// Lazy Counter dedicated to Prices counts. | ||
| class LazyCounterPrices extends LazyCounter { | ||
| const LazyCounterPrices(this.owner); | ||
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| final String? owner; | ||
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| @override | ||
| String getSuffixTag() => 'P_$owner'; | ||
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| @override | ||
| Future<int?> getServerCount() async { | ||
| final MaybeError<GetPricesResult> result = | ||
| await OpenPricesAPIClient.getPrices( | ||
| GetPricesParameters() | ||
| ..owner = owner | ||
| ..pageSize = 1, | ||
| uriHelper: ProductQuery.uriPricesHelper, | ||
| ); | ||
| if (result.isError) { | ||
| return null; | ||
| } | ||
| return result.value.total; | ||
| } | ||
| } | ||
|
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| /// Lazy Counter dedicated to OFF User Search counts. | ||
| class LazyCounterUserSearch extends LazyCounter { | ||
| const LazyCounterUserSearch(this.type); | ||
|
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| final UserSearchType type; | ||
|
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| @override | ||
| String getSuffixTag() => 'US_$type'; | ||
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| @override | ||
| Future<int?> getServerCount() async { | ||
| final User user = ProductQuery.getWriteUser(); | ||
| final ProductSearchQueryConfiguration configuration = type.getConfiguration( | ||
| user.userId, | ||
| 1, | ||
| 1, | ||
| ProductQuery.getLanguage(), | ||
| // one field is enough as we want only the count | ||
| // and we need at least one field (no field meaning all fields) | ||
| <ProductField>[ProductField.BARCODE], | ||
| ); | ||
|
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||
| try { | ||
| final SearchResult result = await OpenFoodAPIClient.searchProducts( | ||
| user, | ||
| configuration, | ||
| uriHelper: ProductQuery.uriProductHelper, | ||
| ); | ||
| return result.count; | ||
| } catch (e) { | ||
| Logs.e( | ||
| 'Could not count the number of products for $type, ${user.userId}', | ||
| ex: e, | ||
| ); | ||
| return null; | ||
| } | ||
| } | ||
| } |
78 changes: 78 additions & 0 deletions
78
packages/smooth_app/lib/pages/preferences/lazy_counter_widget.dart
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| import 'package:flutter/material.dart'; | ||
| import 'package:provider/provider.dart'; | ||
| import 'package:smooth_app/data_models/preferences/user_preferences.dart'; | ||
| import 'package:smooth_app/pages/preferences/lazy_counter.dart'; | ||
|
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| /// Widget displaying a Lazy Counter: cached value, refresh button, and loading. | ||
| class LazyCounterWidget extends StatefulWidget { | ||
| const LazyCounterWidget(this.lazyCounter); | ||
|
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| final LazyCounter lazyCounter; | ||
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| @override | ||
| State<LazyCounterWidget> createState() => _LazyCounterWidgetState(); | ||
| } | ||
|
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| class _LazyCounterWidgetState extends State<LazyCounterWidget> { | ||
| bool _loading = false; | ||
| int? _count; | ||
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| @override | ||
| void initState() { | ||
| super.initState(); | ||
| final UserPreferences userPreferences = context.read<UserPreferences>(); | ||
| _count = widget.lazyCounter.getLocalCount(userPreferences); | ||
| if (_count == null) { | ||
| _asyncLoad(); | ||
| } | ||
| } | ||
|
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| @override | ||
| Widget build(BuildContext context) => Row( | ||
| mainAxisSize: MainAxisSize.min, | ||
| mainAxisAlignment: MainAxisAlignment.end, | ||
| crossAxisAlignment: CrossAxisAlignment.center, | ||
| children: <Widget>[ | ||
| if (_count != null) Text(_count.toString()), | ||
| if (_loading) | ||
| const Padding( | ||
| padding: EdgeInsets.symmetric(horizontal: 12), | ||
| child: SizedBox( | ||
| width: 24, | ||
| height: 24, | ||
| child: CircularProgressIndicator.adaptive(), | ||
| ), | ||
| ) | ||
| else | ||
| IconButton( | ||
| onPressed: () => _asyncLoad(), | ||
| icon: const Icon(Icons.refresh), | ||
| ), | ||
| ], | ||
| ); | ||
|
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| Future<void> _asyncLoad() async { | ||
| if (_loading) { | ||
| return; | ||
| } | ||
| _loading = true; | ||
| final UserPreferences userPreferences = context.read<UserPreferences>(); | ||
| if (mounted) { | ||
| setState(() {}); | ||
| } | ||
| try { | ||
| final int? value = await widget.lazyCounter.getServerCount(); | ||
| if (value != null) { | ||
| await widget.lazyCounter.setLocalCount(value, userPreferences); | ||
| _count = value; | ||
| } | ||
| } catch (e) { | ||
| // | ||
| } finally { | ||
| _loading = false; | ||
| if (mounted) { | ||
| setState(() {}); | ||
| } | ||
| } | ||
| } | ||
| } |
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