fbmobile/lib/core/viewmodels/base_model.dart

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import 'package:flutter/widgets.dart';
import 'package:logger/logger.dart';
import '../../core/util/logger.dart';
import '../enums/viewstate.dart';
class BaseModel extends ChangeNotifier {
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static const String stateViewKey = 'viewState';
static const String stateMessageKey = 'viewMessage';
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final Logger _logger = getLogger();
bool _isDisposed = false;
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final Map<String, Object?> _stateMap = {
stateViewKey: ViewState.idle,
stateMessageKey: null
};
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ViewState? get state => _stateMap[stateViewKey] as ViewState?;
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String? get stateMessage => _stateMap[stateMessageKey] as String?;
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bool getStateValueAsBoolean(String key) {
if (_stateMap.containsKey(key) && _stateMap[key] is bool) {
return _stateMap[key] as bool;
}
return false;
}
String? getStateValueAsString(String key) {
if (_stateMap.containsKey(key) && _stateMap[key] is String) {
return _stateMap[key] as String;
}
return null;
}
int? getStateValueAsInt(String key) {
if (_stateMap.containsKey(key) && _stateMap[key] is int) {
return _stateMap[key] as int;
}
return null;
}
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void setStateBoolValue(String key, bool stateValue) =>
_setStateValue(key, stateValue);
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void setStateIntValue(String key, int? stateValue) =>
_setStateValue(key, stateValue);
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void setStateStringValue(String key, String? stateValue) =>
_setStateValue(key, stateValue);
void _setStateValue(String key, Object? stateValue) {
if (_stateMap.containsKey(key)) {
_stateMap.update(key, (value) => stateValue);
} else {
_stateMap.putIfAbsent(key, () => stateValue);
}
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if (!_isDisposed) {
notifyListeners();
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_logger
.d("Notified state value update '($key, ${stateValue.toString()})'");
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}
}
void removeStateValue(String key) {
_stateMap.remove(key);
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if (!_isDisposed) {
notifyListeners();
_logger.d("Notified state removal of '$key'");
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}
}
void setStateView(ViewState stateView) {
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_setStateValue(stateViewKey, stateView);
}
void setStateMessage(String? stateMessage) {
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_setStateValue(stateMessageKey, stateMessage);
}
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@override
void dispose() {
_logger.d("Calling dispose");
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super.dispose();
_isDisposed = true;
}
}