Kingkor Roy Tirtho
e0c70d153f
now query & mutation share same base class queries are now self-refetchable queryJobs & mutationJobs now support dynamic key allowing dynamic Query/Mutation creation query status & mutation status are now just on point & accurate
66 lines
1.6 KiB
Dart
66 lines
1.6 KiB
Dart
import 'package:flutter/widgets.dart';
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abstract class BaseOperation<Data, StatusType> extends ChangeNotifier {
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/// The number of times the query should refetch in the time of error
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/// before giving up
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final int retries;
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final Duration retryDelay;
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// got from global options
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@protected
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Duration cacheTime;
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// all properties
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Data? data;
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dynamic error;
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StatusType status;
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/// total count of how many times the query retried to get a successful
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/// result
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int retryAttempts = 0;
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DateTime updatedAt;
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@protected
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bool fetched = false;
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/// used for keeping track of query activity. If the are no mounts &
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/// the passed cached time is over than the query is removed from
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/// storage/cache
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Set<ValueKey<String>> _mounts = {};
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BaseOperation({
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required this.cacheTime,
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required this.retries,
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required this.retryDelay,
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required this.status,
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this.data,
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}) : updatedAt = DateTime.now();
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void mount(ValueKey<String> uKey) {
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_mounts.add(uKey);
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}
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void unmount(ValueKey<String> uKey) {
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if (_mounts.length == 1) {
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Future.delayed(cacheTime, () {
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_mounts.remove(uKey);
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// for letting know QueryBowl that this one's time has come for
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// getting crushed
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notifyListeners();
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});
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} else {
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_mounts.remove(uKey);
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}
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}
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Set<ValueKey<String>> get mounts => _mounts;
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bool get isSuccess;
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bool get isError;
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bool get isLoading;
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bool get isIdle;
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bool get isInactive => mounts.isEmpty;
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bool get hasData => isSuccess && data != null;
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bool get hasError => isError && error != null;
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}
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