55 lines
1.5 KiB
Dart
55 lines
1.5 KiB
Dart
/// Centralized error handler that gets notified of every caught exception
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class ErrorHandler {
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/// Singleton instance of ErrorHandler
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static final ErrorHandler _instance = ErrorHandler._internal();
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factory ErrorHandler() => _instance;
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ErrorHandler._internal();
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/// Callback function to handle errors - can be overridden for custom behavior
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void Function(Object error, [StackTrace? stackTrace])? onError;
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// TODO: SET A DEFAULT ONERROR LIKE
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// ScaffoldMessenger.of(context).showSnackBar(
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// SnackBar(
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// content: Text('Error creating derived formula: $e'),
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// duration: const Duration(seconds: 3),
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// ),
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// );
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// }
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/// Notifies the error handler of an exception
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void notify(Object error, [StackTrace? stackTrace]) {
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// Print the exception to stdout as requested
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print('ErrorHandler caught exception:');
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print(error);
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if (stackTrace != null) {
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print('Stack trace:');
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print(stackTrace);
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}
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// Call the custom error handler if provided
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onError?.call(error, stackTrace);
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}
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/// Convenience method to wrap code that might throw exceptions
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T handleError<T>(T Function() operation, {T? defaultValue}) {
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try {
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return operation();
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} catch (error, stackTrace) {
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notify(error, stackTrace);
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if (defaultValue != null) {
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return defaultValue;
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}
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rethrow;
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}
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}
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}
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/// Global instance of ErrorHandler for easy access
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final ErrorHandler errorHandler = ErrorHandler();
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